巴西专利BR112012030313B1 liquefied natural gas production facility and method of projection or construction

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专利摘要:
MODULAR LNG PRODUCTION INSTALLATION. A natural gas production facility and a method of designing and building a liquefied natural gas production facility are described. The installation comprises a plurality of modules spaced for installation at a production site to form a production train having a main axis and a minor axis, each module having a base for the assembly of a plurality of equipment with a selected function assigned to each module, the base module having a major axis and a minor axis; and, a plurality of heat exchangers arranged to run parallel to the main axis of the production train to form a heat exchanger band, having a main axis and a minor axis, where the main axis of the seat is parallel to the main axis of the train; wherein a subset of the plurality of heat exchangers is arranged on a first level of vertically displaced from the base of at least one module to form a partially covered module, and where the main axis of the partially covered module is arranged to be perpendicular to the main axis of the train when the partially covered module is installed in place (...).
公开号:BR112012030313B1
申请号:R112012030313-9
申请日:2012-09-27
公开日:2020-12-29
发明作者:Geoffrey Brian Byfield
申请人:Woodside Energy Technlogies Pty Ltd；
IPC主号:

专利说明:

FIELD OF THE INVENTION
The present invention relates to a modularized liquefied natural gas (LNG) production facility. BACKGROUND OF THE INVENTION
Natural gas (“NG”) is routinely transported from one location to another location in its liquid state as “Liquefied Natural Gas” (LNG). The liquefaction of natural gas makes it more economical to transport, since LNG occupies only 1/600 of the volume that the same amount of natural gas occupies in its gaseous state. After liquefaction, LNG is typically stored in cryogenic containers both at atmospheric pressure and slightly above. LNG is regasified prior to distribution to end users via a pipe or other distribution network at a temperature and pressure that meets the delivery requirements of end users.
Wellhead gas is subjected to gas pretreatment to remove contaminants before liquefaction. Hydrogen sulfide and carbon dioxide can be removed using a suitable process, such as amine adsorption. The removal of water can be achieved using conventional methods, for example, a molecular sieve. Depending on the composition of contaminants present in the inlet gas stream, the inlet gas stream may be subjected to additional pretreatment to remove other contaminants, such as mercury and heavy hydrocarbons prior to liquefaction. Liquefaction is achieved using methods that are well established in the art, which typically involve compression and cooling. Such processes include the APCI C3 / MRTMor Split MRTMor AP-XTM processes, the Phillips Optimized Cascade Process, the Linde Mixed Fluid Cascade process or the Shell Double mixed Refrigerant or Parallel Mixed Refrigerant process. Regardless of the choice of liquefaction process, refrigerants are used to reduce the temperature of the treated wellhead gas to a temperature of around - 160 ° C to form LNG, resulting in the heating of the refrigerant that must be compressed to recycle to the liquefaction process. The compressors used for this function are traditionally gas turbines or electric motors depending on the energy requirements and layout issues of a particular LNG production facility. The coolers required for the various compression and heat exchange operations associated with the LNG plant can be air coolers or water coolers arranged in a heat exchanger bank.
State-of-the-art modularized LNG production trains were closely based on the design and layout of LNC production trains produced in traditional locations. So far, modularization has been driven by the shredding of the LNG train project built on the existing site into transportable sections, leading to some compromises in relation to the placement of some module boundaries. Examples of the state of the art of an air-cooled LNG train built at the traditional site were based on dividing the air-cooled heat exchanger seat into the fewest modules possible for a given air-cooler size inside the cooled heat exchanger seat by air. To keep the total plan size of the LNG production facility to a minimum, it is known to organize subsections of the air-cooled heat exchanger bank along the top of each module to cover one hundred percent of the area defined by the base of the said module aiming to make the heat exchanger bank cooled by air as large as possible for a given module size. Having opted for the complete coverage of each module with a portion of the air-cooled heat exchanger bank, selected larger and taller pieces of process equipment operatively associated with each module, such as pressure vessels, compressors and the heat exchanger cryogenic, are built on site or built as separate modules that are designed to remain uncovered by the air-cooled heat exchanger bank.
The total footprint of such modularized LNG production plants is large due to the sufficient planned space needing to be allocated to allow covered modules incorporating the air-cooled heat exchanger bank to be positioned in a straight line, running along the central longitudinal axis of the LNG production facility with the uncovered modules being moved from the central longitudinal axis and located on one side or the other side of the centrally located air-cooled heat exchanger bank. This prior art organization has several disadvantages. A large number of interconnections are required along the modules between the covered modules of an air-cooled heat exchanger bank and the adjacent uncovered module located from the associated equipment. The use of a large number of small modules invariably requires that the air coolers within the air-cooled heat exchanger bank that are required to perform the cooling function for a particular module will be required to span over at least two modules, avoiding the circulation of fluid through the air coolers until these two modules are joined at the production site. These state-of-the-art designs are based on doubling the angle, as there is inevitably a large amount of empty space below the air-cooled heat exchanger bench in addition to the angle that is used for the spatially displaced process equipment modules .
There remains a need to explore alternative designs for a modular LNG production facility to alleviate at least one of these problems. SUMMARY OF THE INVENTION
According to a first aspect of the present invention, a natural gas production facility is provided comprising:
a plurality of modules spaced for installation in a production site to form a production train having a main axis and a minor axis, each module having a base module for the assembly of a plurality of equipment associated with a selected function assigned to said module , the base module having a major axis and a minor axis; and,
a plurality of heat exchangers arranged to run parallel to the main axis of the production train to form a heat exchanger bank, having a main axis and a minor axis, wherein the main axis of the bank is parallel to the main axis of the train;
wherein a subset of the plurality of heat exchangers is arranged on a first level of vertically displaced from the base of at least one module to form a partially covered module and, where the main axis of the partially covered module is arranged to be perpendicular to the main axis of the train when the partially covered module is installed at the production site.
In one form, the heat exchanger seat has a footprint and the base of the partially covered module projects transversely outwardly beyond the heat exchanger seat's footprint to provide a bare section of the base module on a first side of the heat exchanger seat and , in which the uncovered section of the base module is sized for the assembly of a selected part of the process equipment.
In one form, the heat exchanger seat has a footprint and the base of the partially covered module projects transversely outwardly beyond the heat exchanger seat footprint to provide a first bare section of the base module on a first side of the heat exchanger seat and a second uncovered side of the base module on a second side of the heat exchanger seat, where the first uncovered section is dimensioned for the assembly of a selected first piece of process equipment and the second uncovered section is dimensioned for the assembly of a second selected part of the process equipment.
In one form, one or both or the first and second selected pieces of equipment is a rotating piece of equipment associated with a circulating refrigerant. In one form, one or both selected first and second pieces of equipment is a piece of equipment having a flammable inventory. In one form, one or both or the first and second selected pieces of equipment is a long-term piece of equipment. In one form, one or both or the first and second selected pieces of equipment is equipment having an overall height that is higher than the height of the first level.
In one form, at least a plurality of modules are built at a construction site or assembled at an assembly site prior to transport to the production site, and at least one module is tested for verification at the assembly or construction.
In one form, the heat exchanger bank is arranged such that a subset of the plurality of heat exchangers operatively associated with the selected function of a module is arranged in a first level of vertical displacement from the base of said module.
In one form, the heat exchanger bank is arranged such that a subset of the plurality of heat exchangers operatively associated with the selected function of a module is arranged in a first level vertically displacing from the base of said module and an adjacent module.
In a way, each of the plurality of modules is a partially covered module.
In one form, in the subset of heat exchangers of at least one module, it has a footprint that covers at least 90% of the footprint of the base module to form a fully covered module with a major axis and a minor axis, the main axis of the module fully covered being arranged to be parallel to the main axis of the train when the fully covered module is installed at the production site.
In one form, one of the plurality of modules is a pretreatment module for removing contaminants from a natural gas feed stream to produce a pretreated natural gas stream.
In one form, the pretreatment module is a partially covered module, having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation at the production site.
In one form, one of the plurality of modules is a first refrigerant condenser module for pre-cooling a pretreated gas stream to produce a pre-cooled gas stream and a first coolant stream.
In a way, that the first refrigerant condenser module is a fully covered module.
In one form, one of the plurality of modules is a first refrigerant gas compression module for compacting a first refrigerant vapor stream to produce a first compressed refrigerant stream to recycle to a first refrigerant condenser module.
In one form, the first refrigerant gas compression module is a partially covered module, having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation at the production site.
In one form, one of the plurality of modules is a liquefaction module operatively associated with a main cryogenic heat exchanger to further cool a flow of pre-cooled gas through indirect heat exchange, with a second refrigerant to produce a flow of liquefied natural gas product and a second flow of refrigerant vapor.
In one form, the liquefaction module is a partially covered module having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation on site of production.
In one form, one of the plurality of modules is a second refrigerant compression module for compressing a second flow of refrigerant vapor to produce a second compressed refrigerant flow for recycling to a main cryogenic heat exchanger.
In one form, the second refrigerant compression module is a partially covered module having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation. on the production site.
In one form, a first refrigerant compressor is disposed in the first uncovered section and a second refrigerant compressor is disposed in the second uncovered section.
In one form, one or both of the first and second compressors is a variable speed compressor.
In one form, one or both of the first and second compressors is / are driven by an aero-derivative gas turbine.
In one form, the first refrigerant is propane. In one form, the second refrigerant is a mixture of mixed refrigerant hydrocarbons.
In one form, each of the plurality of modules is substantially equal in size.
In one form, each of the plurality of modules has a weight in the range of 2000 to 8000 tons or 3000 to 4000 tons.
In one way, the production site is onshore, offshore, in a floating installation, offshore in a fixed installation, barge-mounted or grounded installation.
In one form, heat exchangers are air-cooled heat exchangers.
According to a second aspect of the present invention, a module is provided for use in any form of the natural gas production facility of the first aspect of the present invention.
According to a second aspect of the present invention, a method is provided for designing or building a natural gas production facility, the method comprising the steps of:
provide a plurality of spaced modules for installation in a production site to form a production train having a main axis and a minor axis, each module having a base module for the assembly of a plurality of equipment associated with a selected function assigned to said module, the base module having a major axis and a minor axis; and,
organizing a plurality of heat exchangers to run parallel to the main axis of the production train, to form a heat exchanger bank having a main axis and a minor axis, where the main axis of the bank is parallel to the main axis of the train;
organizing a subset of the plurality of heat exchangers on a first level of vertically displaced from the base of at least one module to form a partially covered module; and,
arrange the main axis of the partially covered module to be perpendicular to the major axis of the train when the partially covered module is installed at the production site.
In one form, the heat exchanger seat has a footprint and the base of the partially covered module projects transversely outwardly beyond the heat exchanger seat's footprint to provide a bare section of the base module on a first side of the heat exchanger seat and, where the bare section of the base module is dimensioned for the assembly of a selected part of the process equipment.
In one form, the heat exchanger seat has a footprint and the base of the partially covered module projects transversely outwardly beyond the heat exchanger seat footprint to provide a first bare section of the base module on a first side of the heat exchanger seat and a second uncovered side of the base module on a second side of the heat exchanger seat, where the first uncovered section is dimensioned for the assembly of a selected first piece of process equipment and the second uncovered section is dimensioned for the assembly of a second selected part of the process equipment.
In a way, that one or both or the first and second selected pieces of equipment is / are a rotating piece of equipment associated with a circulating refrigerant
In one form, one or both selected first and second pieces of equipment is a piece of equipment having a flammable inventory.
In one form, one or both or the first and second selected pieces of equipment is / are a long-term piece of equipment time.
In one form, one or both of the selected first and second pieces of equipment is / are a piece of equipment having an overall height that is higher than the height of the first level.
In one form, at least one of the plurality of modules is built at a construction site or assembled at an assembly site prior to transport to the production site, and at least one module is tested for on-site verification purposes assembly or construction.
In one form, the heat exchanger bank is arranged such that a subset of the plurality of heat exchangers operatively associated with the selected function of a module is arranged on a first level of vertically displaced from the base of said module.
In one form, the heat exchanger bank is arranged such that a subset of the plurality of heat exchangers operatively associated with the selected function of a module is arranged on a first level vertically displaced from the base of said module and an adjacent module.
In one way, each of the plurality of modules is a partially covered module.
In one form, in the subset of heat exchangers, at least one module has a footprint that covers at least 90% of the footprint of the base module to form a fully covered module with a major axis and a minor axis, the main axis of the module fully covered being arranged to be parallel to the main axis of the train when the fully covered module is installed at the production site.
In one form, one of the plurality of modules is a pretreatment module for removing contaminants from a natural gas feed stream to produce a pretreated gas stream.
In one form, the pretreatment module is a partially covered module having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation on the production site.
In one form, one of the plurality of modules is a first refrigerant condenser module for pre-cooling a pretreated gas stream to produce a pre-cooled gas stream and a first coolant stream. In one form, the first refrigerant condenser module is a fully covered module.
In one form, one of the plurality of modules is a first refrigerant gas compression module for compacting a first refrigerant vapor stream to produce a first compressed refrigerant stream to recycle to a first refrigerant condenser module.
In one form, the first refrigerant compression module is a partially covered module having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation on the production site.
In one form, one of the plurality of modules is a liquefaction module operatively associated with a main cryogenic heat exchanger to further cool a flow of pre-cooled gas through indirect heat exchange, with a second refrigerant to produce a flow of natural gas product and a second flow of refrigerant vapor.
In one form, the liquefaction module is a partially covered module having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation on site of production.
In one form, one of the plurality of modules is a second refrigerant compression module for compressing a second flow of refrigerant vapor to produce a second compressed refrigerant flow for recycling to a main cryogenic heat exchanger.
In one form, the second refrigerant compression module is a partially covered module having a first bare section of the base on a first side of the heat exchanger seat and a second bare section of the module on a second side of the heat exchanger seat after installation. on the production site.
In one form, a first refrigerant compressor is disposed in the first uncovered section and a second refrigerant compressor is disposed in the second uncovered section.
In one form, one or both of the first and second compressors is a variable speed compressor.
In one form, one or both of the first and second compressors is / are driven by an aero-derivative gas turbine.
In one form, the first refrigerant is propane. In one form, the second refrigerant is a mixture of mixed refrigerant hydrocarbons.
In one form, each of the plurality of modules is substantially equal in size.
In one form, each of the plurality of modules has a weight in the range of 2000 to 8000 tons or 3000 to 4000 tons.
In one way, the production site is onshore, offshore, in a floating installation, offshore in a fixed installation, barge-mounted or grounded installation.
In one form, heat exchangers are air-cooled heat exchangers. BRIEF DESCRIPTION OF THE FIGURES
In order to facilitate a more detailed understanding of the nature of the invention, various embodiments of the present invention will now be in detail, for example only, with reference to the attached figures, in which:
FIG. 1a) is a schematic plan view of a first embodiment of the present invention;
FIG. 1b) is a schematic plan view of a second embodiment of the present invention;
FIG. 1c) is a schematic plan view of a third embodiment of the present invention;
FIG. 2 is an isometric view from a direction of a detailed embodiment of an LNG production train of the present invention;
FIG. 3 is an isometric view of the LNG production train of FIG. 2 taken from a second direction;
FIG. 4 is a plan view of the LNG production train of FIG.2;
FIG. 5 is an isometric view of the pretreatment module of the LNG production train illustrated in FIG. two;
FIG. 6 is a plan view of the pretreatment module of FIG. 5;
FIG. 7 is an isometric view of the propane compression module of the LNG production train illustrated in FIG. two;
FIG. 8 is a plan view of the propane compression module of FIG. 7;
FIG. 9 is an isometric view of the propane condenser module of the LNG production train illustrated in FIG. two;
FIG. 10 is a plan view of the propane condenser module of FIG. 7;
FIG. 11 is an isometric view of the LNG production train liquefaction module illustrated in FIG. two;
FIG. 12 is a plan view of the liquefaction module of FIG. 11;
FIG. 13 is an isometric view of the mixed refrigerant gas compression module of the LNG production train illustrated in FIG. two;
FIG. 14 is a plan view of the mixed refrigerant gas compression module of FIG. 13. DETAILED DESCRIPTION OF PRIVATE MODALITIES
Particular embodiments of the present invention are now described. The terminology used here is for the purpose of describing the particular modalities only, and is not intended to limit the scope of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those versed in the technique to which this invention belongs. Similar reference numerals refer to similar parts.
The term "built on site" or "out of module" refers to a factory or section of a factory that is built predominantly on a production site that the plant is intended to occupy with the completion of the construction of the factory. In contrast, the term "module" refers to a section of a factory that is pre-assembled at an assembly or construction site remote from the production site. Each module is designed to be transported from the assembly or construction site to the production site by trailer or floating barges or by land using rail or truck. After each module is moved from the assembly or construction site to the production site, the module is positioned module in a predetermined orientation to suit the needs of a given LNG production facility.
The term “train” refers to facilities used for pretreating a natural gas feed stream to remove contaminants and facilities used to receive pretreated gas and subject pretreated gas to cool to form natural gas liquefied.
Referring to FIG. 1a), the present invention relates to an LNG production facility (10) including at least one elongated LNG production train (12) having a major axis (14) and a minor axis (16). The at least one train can be one of a plurality of trains. The LNG production train includes a plurality of spaced modules (18) that are built at a construction site or assembled at an assembly site and then transported to a production site (20) for installation. Each module (18) has a base module (22) for assembling a plurality of equipment (24) associated with the selected function assigned to that module, the base (22) having a main axis (26) and a minor axis (28) with the main axis being perpendicular to the minor axis. The major and minor axes (26 and 28, respectively) form a horizontal plane. When the base (22) is rectangular, the main axis (26) is longer than the smaller axis (24). When the base is square, the main axis is equal to the minor axis. When installed at the production site, the horizontal plane defined by the base of each module will rest on an area of soil, defining a footprint for that module.
The LNG production facility additionally includes a plurality of heat exchangers (29) arranged to run parallel to the main axis (14) of the elongated production train (12) to form a heat exchanger bank (30) having a main axis ( 32) and a minor axis (34). The main axis (34) of the heat exchanger bank (30) is parallel to the main axis (14) of the LNG production train (12). In addition to this, a subset (36) of the plurality of heat exchangers is arranged on a first level (38) vertically displaced from the base (22) of at least one module (18) to form a partially covered module (40) . This organization is used to minimize the planned space required for the installation of LNG production (10). The main axis (26) of the partially covered module (40) is arranged to rest perpendicular to the main axis (14) of the train when the partially covered module (40) is installed at the production site (20). In a preferred embodiment of the present invention, each of the plurality of modules can be covered by a subset of the plurality of heat exchangers. However, the LNG production train can include at least one module that remains uncovered by any of the plurality of heat exchangers.
The heat exchanger seat (30) has a footprint and the base (22) of the partially covered module (40) projects across the main axis of the train (12) in order to extend beyond the footprint of the heat exchanger seat (30 ) to provide a bare section (42) of the base module (22) on a first side (44) of the heat exchanger bank (30). The uncovered section of the base module is sized for mounting a selected part of the process equipment (46) as illustrated in FIG.Ia). Alternatively, the base (22) of the partially covered module (40) projects transversely outwardly beyond the footprint of the heat exchanger bank (30) to provide a first bare section (48) of the base module (22) on a first side (44) ) of the heat exchanger bank (30) and a second uncovered side (50) of the base module (22) on a second side (52) of the heat exchanger bank (30). The first uncovered section (48) is dimensioned for mounting a selected first piece of process equipment (54). The second uncovered section (50) is dimensioned for mounting a second selected piece of process equipment (56). In FIG. 1c), some of the partially discovered modules (40) are arranged to have only one covered section (42) while other partially covered modules (40) are arranged to have a first discovered section (48) of the base module (22) in a first side (44) of the heat exchanger seat (30) and a second bare side (50) of the base module (22) on a second side (52) of the heat exchanger seat (30). The selected pieces of equipment (46, 54 or 56) can be a rotating piece of equipment associated with a circulating refrigerant, a piece of high-cost construction equipment, a piece of intensive maintenance equipment, a piece of stock equipment from high hydrocarbon, a long-term standby part of the equipment, or, a piece of equipment having an overall height that is higher than the height of the first level.
Within each module, the pieces of equipment required to perform the predetermined assigned function for that module are organized to minimize the interfaces between modules in order to minimize the interconnection that is required to be completed when the modules are delivered from a construction site or assembly site for the production site. In this way, a module can be essentially self-contained and provided with a temporary control system to allow the module to be switched for cycle and commissioning checks at the assembly or construction site prior to transportation to the production site. Upon arrival at the production site, wireless control can be used for intra-modular communication and control of the additional reduction in interconnection time. In a production site where it is important to minimize the length of interconnecting pipeline paths between modules, the plurality of modules are spaced as closely as possible, while still allowing sufficient space at the production site to interconnect interconnections between modules.
The present invention is based in part on the decision to position substantially all of the equipment required to perform the predetermined assigned function for each module within each module. Preferably, this includes the organization of the heat exchanger bank so that the subset of the plurality of heat exchangers that is operatively associated with the predetermined function of each module is positioned within the module that performed that predetermined function. This arrangement allows for a reduction in the number of cross-module interconnections between heat exchangers and related process equipment. However, if required, one or more of the subset of heat exchangers (36) that are operatively associated with a first module (for example, the propane condenser module (64)) can be located in an adjacent module (for example, the liquefaction module (70)) as illustrated by the strongly dashed line in FIG. 4, to minimize the total footprint while maximizing the total capacity of the heat exchanger. In this way, the subset of heat exchangers (36) is organized to span over a plurality of adjacent modules when installed at the production site (20).
It can be clearly seen from FIGS. 1a), b) and c) that the subset of heat exchangers associated with each partially covered module are positioned in such a way that, when the plurality of modules (18) is installed at the production site (20), the plurality of heat exchangers Heat (29) runs parallel to the main axis (14) of the elongated production train (12) to form the heat exchanger bank (30).
A module that has a predetermined function that requires a large number of heat exchangers in a given subset can be completely covered with the heat exchangers. The term ‘fully covered module’ (60) is used here to describe a module for which the footprint of the heat exchanger subset covers at least 90% of the footprint of the base module. For those modules that have a predetermined function that requires a smaller subset of operatively associated heat exchangers, the module can be a partially covered module. The uncovered section is designed and sized to be large enough to accommodate a selected piece of equipment, preferably a selected piece of equipment that performs the function assigned to the partially covered module. By definition, using this arrangement, the main axis (26) of each of the fully covered modules (60) runs parallel to the main axis (14) of the LNG production train. In this way, a fully covered module (60) is designed to be rotated at right angles to a partially covered module (40).
The uncovered sections of the partially covered modules allow unobstructed access to the overhead crane from selected pieces of equipment as well as access from the improved side making construction and maintenance of selected pieces of equipment easier. The extension of the footprint of the base module in relation to the footprint of the module's heat exchanger subset allows installation and placement of selected pieces of equipment in a less congested area of the module that has the fluid benefit of allowing selected pieces of equipment to be the last pieces of equipment that are installed in each module. The selected pieces of equipment can be high-cost construction equipment, long-term wait equipment, or large pieces of equipment that have a height that is higher than the height of the first high level occupied by the subset of heat exchangers in the bank. The long-term wait items that need to be incorporated into the module last in the construction sequence can be installed at the assembly or construction site or at the production site to optimize the construction schedule requirements of an LNG production facility particular.
Advantageously, each partially covered module can be tested for verification purposes at an assembly or construction site remote from the production site. In circumstances where a subset of heat exchangers operatively associated with a fully covered module need to be arranged above both the fully covered module and an adjacent partially covered module, pre-commissioning testing and verification of the fully covered module occurs after installation of both modules at the production site.
An embodiment of a LNG production facility using the method and system of the present invention will now be described in detail with reference to Figures 2 to 14. In general terms, the method for liquefying a natural gas flow comprises the steps of:
a) pretreating a natural gas supply stream in a pretreatment module (62) to produce a pretreated natural gas stream;
b) pre-cooling the pre-treated natural gas flow in a first refrigerant condenser module (64) to produce a pre-cooled gas flow and a first refrigerant vapor flow;
c) compressing the first refrigerant vapor stream into a first refrigerant gas compression module (66) to produce a first compressed refrigerant stream to recycle to step b);
d) further cooling of the pre-cooled gas flow in a main cryogenic heat exchanger (68) operatively associated with a liquefaction module (70) through indirect heat exchange with a second refrigerant to produce a natural gas product flow liquefied and a second flow of refrigerant vapor;
e) compressing the second refrigerant vapor flow into a second refrigerant gas compression module (72) to produce a second refrigerant flow to recycle for step d).
In a detailed discussion of the various embodiments of the present invention below, the first refrigerant is propane, while the second refrigerant is a mixture of mixed refrigerant hydrocarbons. This type of process is known as a pre-cooled propane mixed refrigerant, or C3MR process, which is used to manufacture most of the LNG produced worldwide and is a process that is not further discussed here as it is considered well known by the person skilled in technical. When using propane as the first refrigerant, care is taken to ensure that the propane does not leak, as propane vapor is highly flammable. Using the system of the present invention, the process equipment required for propane compression is grouped together with the propane compression module to facilitate pre-commissioning and commissioning of the module - having all the necessary accessories to circulate the fluid through the compressor at the assembly or construction site. In order to further improve safely, the main rotating equipment associated with the propane circuits is positioned in the uncovered sections of the partially covered modules instead of below the heat exchangers arranged on the first level. In one embodiment, the main rotating equipment is positioned in the first bare section of a module with the main hydrocarbon stock positioned in a second bare section of the module. Using this arrangement, both sets of equipment avoid an otherwise congested area below the operatively associated heat exchangers, while ensuring that the main hydrocarbon stock is located away from the main rotating equipment.
In the embodiment illustrated in Figures 2 to 14, the LNG production facility has a single LNG production train that includes the following modules of substantially equal sizes:
a) a pre-treatment module;
b) a first refrigerant gas compression module (in this example, a propane compression module);
c) a first refrigerant condenser module (in this example, a propane condenser module);
d) a liquefaction module; and,
e) a second refrigerant gas compression module (in this example, a mixed refrigerant compression module (MR).
The organization of the equipment within the modules was fair with a view to construction, maintenance and safety. The main rotating equipment was completely positioned on the edges of the module instead of below the heat exchangers. This allows good access for maintenance and allows long-term wait items to be incorporated into the module last in the construction sequence. The main hydrocarbon stocks avoid the congested area below the heat exchangers, and are located away from the main rotating equipment. Elevated platforms with bridge access were provided for the installation of reliefs and recycling valves.
A modality of a pre-treatment module (18, 62) is now described with reference to Figures 5 and 6. In this modality, the pre-treatment module is a partially covered module (42) to maximize the potential for pre-commissioning at the assembly or construction site. As best seen in Figure 6, a first uncovered section (48) of the base (22) of the pretreatment module (62) is located on a first side (44) of the heat exchanger bank (30) with a second uncovered section (50) of the base module being located on the second (opposite) side (52) of the heat exchanger bank (30). With installation at the production site, the main axis (26) of the base (22) of the pretreatment module (62) is positioned to be perpendicular to the main axis (14) of the train. In this configuration, the subset of heat exchangers operatively associated with the pretreatment module is arranged to rest parallel to the longitudinal axis of the LNG production train after installation at the production site. The pretreatment module includes the equipment required to perform the function of removing contaminants by removing acid gas, dehydrating and (optionally) removing mercury. In the illustrated embodiment, the acid gas removal unit column and the associated waste vessel and pumps are located outside the module to provide spacing between other pretreatment processing equipment and spent equipment. The adsorbents are located on the module with sufficient opening for changes in the molecular sieve. The pretreatment module is designed as one of the outer modules to provide easy connection to the natural gas inlet flow source being fed to the pretreatment module.
One embodiment of a propane compression module (66) is now described with reference to Figures 7 and 8. The propane suction drums are all located in a single module to maximize the potential for commissioning at an assembly or construction site . In this modality, the propane compression module is a partially covered module to maximize the potential for pre-commissioning at the assembly or construction site. As best seen in Figure 8, a first bare section (48) of the base (22) of the propane compression module (66) is located on a first side (44) of the heat exchanger seat (30) with a second bare section (50) of the base module being located on the second side (opposite) (52) of the heat exchanger bank (30). With installation at the production site, the main axis (26) of the base (22) of the propane compression module (66) is positioned to be perpendicular to the main axis (14) of the train. In this configuration, the subset of heat exchangers operatively associated with the propane compression module will be parallel to the longitudinal axis of the LNG production train after installation at the production site. A propane storage unit is positioned on the first side of the heat exchanger structure together with the sub-chiller C3 to minimize the length of the pipe containing the flammable liquid. The propane compression module is designed as one of the interior modules to provide a central position to facilitate the distribution of propane refrigerant to keep the stock as low as possible and to allow the location of one or more of the propane boilers in the adjacent modules or outside the module.
A modality of a propane condenser module (64) is now described with reference to Figures 9 and 10. In this modality, the propane condenser module (64) is a fully covered module (60) as best seen in Figure 10 due to this module requires a comparatively large number of heat exchangers compared to other modules. The propane condenser module has a main shaft (26) that is longer than the other modules to accommodate your requirement for a larger subset of heat exchangers in the heat exchanger bank (30). With installation at the production site, the main axis (26) of the base (22) of the propane condenser module (64) is positioned to be parallel to the main axis (14) of the train. In this configuration, the subset of heat exchangers operatively associated with the propane condenser module is arranged to rest parallel to the main axis of the LNG production train (12) after installation at the production site (20). Thus, the orientation of the propane condenser module differs from that of the other modules. The flow system and cooling water system equipment associated with the predetermined function being performed by the propane condenser module can be safely located below the heat exchangers operatively associated with the propane condenser module, since these stocks are not flammable. The predetermined function being performed by the propane condenser module includes pre-cooling natural gas using propane. The propane condenser module is conveniently located between the propane compression module (66) and the liquefaction module (70) so that the pretreated natural gas can be pre-cooled before liquefaction.
One embodiment of a liquefaction module (70) is now described with reference to Figures 11 and 12. In the illustrated embodiment, the main cryogenic heat exchanger (68) is located outside the module and positioned adjacent to the propane condenser module (64) as best seen in Figures 9 and 10, due to their size and weight mitigating the potential for damage during transport. The static equipment and pumps that are operatively associated with the main cryogenic heat exchanger (68) are positioned in the liquefaction module (70) on the same side of the heat exchanger bank as the main cryogenic heat exchanger to minimize interconnecting piping routes. . If it is decided to place the MCHE on the liquefaction module, the partially covered liquefaction module can be dimensioned to accommodate a main cryogenic heat exchanger (MCHE). In the illustrated embodiment, the liquefaction module has only one uncovered section (42) to allow a flow-driven final flash gas compressor (80) to be located on the first side of the liquefaction module (70). This allows access from the overhead crane to the final flash gas compressor and overhead crane away from the MCHE. With installation at the production site, the main axis (26) of the base (22) of the liquefaction module (70) is positioned to be perpendicular to the main axis (14) of the train (12). In this configuration, the subset of heat exchangers operatively associated with the liquefaction module (70) will be parallel to the main axis (14) of the train (12) after installation at the production site (20). Equipment associated with the removal of nitrogen and helium can also be positioned in the liquefaction module if required.
A modality of a second refrigerant compression (MR) module (72) is now described with reference to Figures 13 and 14. The mixed refrigerant gas compression module includes all the process equipment required to fulfill the functional requirement of that module including the gas turbine, compressor, interconnection piping, waste heat recovery, and recycling valves that are arranged in the base module. The subset of heat exchangers operatively associated with the MR compression module provide the required post-cooling and inter-cooling for mixed refrigerant compressors. In this modality, the MR compression module (72) is a partially covered module (to maximize the potential for pre-commissioning at the assembly or construction site). As best seen in Figure 14, a first uncovered section (48) of the base (22) of the MR compression module (72) is located on a first side (44) of the heat exchanger bank (30) to accommodate the refrigerant compressor mixed (82) high pressure (HP). The second uncovered section (50) of the base (22) is located on the second (opposite) side (52) of the heat exchanger bank (30) to accommodate the mixed low pressure (84) refrigerant compressor (LP). With installation at the production site, the main axis of the base of the MR compression module is positioned so as to be perpendicular to the central longitudinal axis of the train. In this configuration, the subset of heat exchangers operatively associated with the MR compression module will be parallel to the longitudinal axis of the LNG production train after installation at the production site. The MR compression module is designed as one of the outer modules.
Referring now to Figures 2 to 14, the positioning of the liquefaction module (70) between the first and the second refrigerant gas compression modules (66 and 72, respectively) provides two important advantages. First, the compressors associated with the second refrigerant module (MR) are long-term waiting items. By positioning the MR compression module on the LNG production train, the other modules can be transported to the production site and interconnected first if there is a delay in the delivery of the MR compressors. Second, while the subset of heat exchangers associated with the mixed refrigerant gas compression module is positioned in the first layer above the base of the mixed refrigerant gas compression module, the subset of heat exchangers operatively associated with the propane condenser module not only completely covers the base module of the propane condenser module, but also transposes to partially cover the base module of the adjacent liquefaction module as represented by the strongly dotted line in Figure 4. The final flash gas compressor requires only very few heat exchangers with the result that the liquefaction module has space available for additional heat exchangers. The service that requires additional space is the propane condenser, which makes it advantageous to position the liquefaction module adjacent to the propane condenser module. This arrangement requires relatively long MR piping routes to reach the boilers located in the propane compression module for pre-cooling. The design of the state-of-the-art LNG production plant is based on the positioning of the liquefaction outside the train in order to minimize the length of the LNG export pipeline. However, in balance, the organization shown in Figures 2 to 14 is favored due to the compressed MR operating at high pressure (> 5000 kPag). If the train is organized, on the contrary, to minimize the length of the MR tracks at the expense of the propane cooling pipe operating at lower pressure (<1000 kPag), hydraulic losses would result in a more significant reduction in the train's capacity of liquefaction.
Each module is designed to ensure that the main hydrocarbon stocks and all rotating equipment are positioned at the edges of the module in the uncovered sections of partially covered modules, and not below the air-cooled heat exchanger bank. This allows good access for maintenance and allows long wait items to be incorporated into the module last in the construction sequence. The significantly reduced hydrocarbon stock provides improved safety by facilitating treatment with the consequences of a spill. In addition, the general layout of the LNG production train of the present invention is designed for modularization, with small compact equipment selected to suit modularization instead of adopting the state of the art approach based on economies of scale. In contrast, the smaller, more intensive equipment was selected in order to be able to fit more items within the modules of a limited size and weight. The organization of the process equipment along each module in the illustrated mode has been optimized to provide modules of uniform weight in the order of 2000 to 8000 tons, preferably 3000 to 4000 tons. The capacity of the optimized modularized train is around 2.5 million tons per year (mtpa) of LNG production. If greater capacity is desired at a particular production site, the modularized train can be one of a plurality of modularized trains. For example, two modularized trains can be organized at a production site to provide a total LNG production capacity of 5 mtpy.
An example of smaller, more intensive equipment selection that is easier to modularize is the main refrigerant gas turbines. The starting point of this work was to use smaller, more efficient aero-derivative gas turbines (86) that can be completely integrated into modules of a practical size. Aero-derivative gas turbines have been integrated into the modules, complete with all elements of each compression system. This allows complicated large diameter compressor suction and discharge lines to be built at a construction site instead of being built at the production site, while retaining a practical total module size / weight. Using smaller units and keeping the gas turbine and compressor integrated in the same module minimizes the number of connections on site, and also allows the compression system to be fully tested to a stage of nitrogen testing pathway at the assembly or construction site. This extra level of commissioning and testing at the assembly or construction site has benefits in reducing the amount of work performed that must be done at a significantly higher work rate at the production site. The variable speed nature of aero-derivative gas turbines simplifies compressor startup and eliminates the need to depressurize refrigerant. Removing the need for starter / auxiliary engines for the gas turbines used in state-of-the-art LNG trains significantly reduces the maximum electrical power demand of the modularized LNG train and helps to keep the module size low.
In the illustrated modality, a small number of elements of selected equipment have been deliberately retained outside the module in favor of being built on site. These include the acid gas disposal unit that is built on site for safety reasons to maintain the separation of the spent equipment. The acid gas absorber column is built in place due to its weight and its high center of gravity. Top propane boilers are built on site for safety reasons and because of their elevation. The main cryogenic heat exchanger is built in place to protect against damage to the internal piping that could occur during transportation and due to this item being able to have the longest delivery time in the construction schedule.
The production site can be onshore, offshore in a floating facility, offshore in a fixed facility, or a barge-mounted or grounded facility. For example routes, the modules can be floating using gravity-based structures made of steel or concrete with integrated LNG storage, vaporization gas reliquefaction functionality or charge with gas supplied to the production site through an underwater pipeline line . The plurality of heat exchangers in the heat exchanger bank can be air coolers or water coolers. Alternatively, water coolers can be used for at least one module with air coolers used for at least another module. The LNG plant can additionally include optional treatment steps, such as product purification steps (helium removal, nitrogen removal) and non-methane product production steps (deethanization, depropanization, sulfur recovery) if desired. The natural gas feed stream can be produced and obtained from a reservoir of natural gas or oil. As an alternative, the natural gas feed stream can also be obtained from another source, also including a synthetic source, such as a Fischer-Tropsch process, in which methane is produced from synthesis gas.
It will be clearly understood that, although a number of prior art publications are referred to here, such reference does not constitute an admission that any of these documents form part of the common general knowledge of the technique, in Australia or in any other country. In the summary of the invention, the description of the claims that follows, except where the context requires otherwise due to the expressed language or necessary implication, the word "understand" or variations, such as "understand" or "understanding", is used in a inclusive sense, that is, to specify the presence of stated features, but not to exclude the presence or addition of additional features in various embodiments of the invention.

权利要求:
Claims (51)
[0001]
1. Installation for the production of liquefied natural gas (10), comprising: a plurality of modules (18) for installation in a production site (20) to form a production train (12) having a main axis (14) and a minor axis (16), each module (18) having a base module (22) for the assembly of a plurality of equipment (24) associated with a selected function assigned to said module (18), the base module (22) having a main axis (26) and a minor axis (28); and, a plurality of heat exchangers (29) arranged to run parallel to the main axis (14) of the production train (12) to form a heat exchanger bank (30), having a main axis (32) and a minor axis (34), where the main axis (32) of the seat is parallel to the main axis (14) of the train (12); characterized by the fact that the plurality of modules (18) is spaced and a subset (36) of the plurality of heat exchangers is arranged on a first level (38) vertically offset from the base (22) of at least one module (18) to form a partially covered module (40) and, where the main axis (26) of the partially covered module (40) is arranged to be perpendicular to the main axis (14) of the train (12) when the partially covered module (40) is installed at the production site (20).
[0002]
2. Liquefied natural gas production facility (10), according to claim 1, characterized by the fact that the heat exchanger bank (30) has a footprint and the base (22) of the partially covered module (40) is projects transversely outwardly beyond the footprint of the heat exchanger bank (30) to provide an uncovered section (42) of the base module (22) on a first side (44) of the heat exchanger bank (30) and, where the section discovery (42) of the base module (22) is dimensioned for the assembly of a selected piece of process equipment (46, 54, 56).
[0003]
3. Liquefied natural gas production facility (10), according to claim 1, characterized by the fact that the heat exchanger bank (30) has a footprint and the base (22) of the partially covered module (40) is projects transversely outwardly beyond the footprint of the heat exchanger seat (30) to provide a first bare section (48) of the base module (22) on a first side (44) of the heat exchanger seat (30) and a second session (50 ) discovery of the base module (22) on a second side (52) of the heat exchanger bank (30), in which the first uncovered section (48) is dimensioned for the assembly of a first selected piece of process equipment (54) and the second uncovered section (50) is dimensioned for the assembly of a second selected part of the process equipment (56).
[0004]
4. Liquefied natural gas production facility (10), according to claim 2 or 3, characterized by the fact that one or both or the first and second selected pieces of equipment (46, 54, 56) is / are a or more among: a rotating piece of equipment associated with a circulating refrigerant, a piece of equipment having a flammable inventory; a piece of equipment long-term wait time; or a piece of equipment having an overall height that is higher than the height of the first level (38).
[0005]
5. Liquefied natural gas production facility (10) according to any one of claims 1 to 4, characterized by the fact that the heat exchanger bank (30) is arranged such that a subset (36) of the plurality of exchangers The heat (29) of a module (64) is arranged on a first level vertically offset from the base (22) of said a module and an adjacent module (70).
[0006]
6. Liquefied natural gas production facility (10) according to any one of claims 1 to 5, characterized by the fact that each of the plurality of modules (18) is a partially covered module (40).
[0007]
7. Liquefied natural gas production facility (10) according to any one of claims 1 to 6, characterized by the fact that in the heat exchanger subset (36) of at least one module (18) has a footprint that covers at least 90% of the footprint of the base module (22) to form a fully covered module (60) having a main axis (26) and a minor axis (28), the main axis (26) of the fully covered module (60) being arranged to be parallel to the main axis (14) of the train (12) when the fully covered module (60) is installed at the production site.
[0008]
8. Liquefied natural gas production facility (10), according to any of the preceding claims, characterized by the fact that one of the plurality of modules (18) is a pre-treatment module (62) for removing contaminants of a natural gas feed stream to produce a pre-treated gas stream.
[0009]
9. Liquefied natural gas production facility (10), according to claim 8, characterized by the fact that the pre-treatment module (62) is a partially covered module (40), having a first uncovered section (48 ) of the base on a first side (44) of the heat exchanger bank (30) and a second uncovered section (50) of the module on a second side (52) of the heat exchanger bank after installation at the production site.
[0010]
10. Liquefied natural gas production facility (10) according to any one of claims 1 to 9, characterized by the fact that one of the plurality of modules (18) is a first refrigerant condenser module (64) for pre-cooling a pre-treated gas stream to produce a pre-cooled gas stream and a first refrigerant steam stream.
[0011]
11. Installation for the production of liquefied natural gas (10), according to claim 10, characterized by the fact that the first refrigerant condenser module (64) is a fully covered module (60).
[0012]
12. Liquefied natural gas production facility (10) according to any one of claims 1 to 9, characterized by the fact that one of the plurality of modules (18) is a first refrigerant gas compression module (66) for the compaction of a first refrigerant vapor stream to produce a first compressed refrigerant stream to recycle to a first refrigerant condenser module (64).
[0013]
13. Liquefied natural gas production facility (10), according to claim 12, characterized by the fact that the first refrigerant gas compression module (66) is a partially covered module (40), having a first uncovered section (48) of the base (22) on a first side (44) of the heat exchanger seat (30) and a second bare section (50) of the module (66) on a second side (52) of the heat exchanger seat (30 ) after installation at the production site.
[0014]
14. Liquefied natural gas production facility (10) according to any one of claims 1 to 13, characterized by the fact that one of the plurality of modules (18) is a liquefaction module (70) operatively associated with a exchanger of main cryogenic heat (68) to additionally cool a flow of pre-cooled gas through indirect heat exchange with a second refrigerant to produce a flow of liquefied natural gas product and a second flow of refrigerant vapor.
[0015]
15. Liquefied natural gas production facility (10), according to claim 14, characterized by the fact that the liquefaction module (70) is a partially covered module (40) having a first bare section (48) of the base (22) on a first side (44) of the heat exchanger bank (30) and a second bare section (50) of the module (70) on a second side (52) of the heat exchanger bank (30) after installation in the production site.
[0016]
16. Liquefied natural gas production plant (10) according to any one of claims 1 to 13, characterized by the fact that one of the plurality of modules (18) is a second refrigerant compression module (72) for compressing a second stream of refrigerant vapor to produce a second compressed refrigerant stream to recycle to a main cryogenic heat exchanger (68).
[0017]
17. Liquefied natural gas production facility (10), according to claim 16, characterized by the fact that the second refrigerant compression module (72) is a partially covered module (42) having a first uncovered section (48) the base (22) on a first side (44) of the heat exchanger seat (30) and a second bare section (50) of the module (72) on a second side (52) of the heat exchanger seat (30) after installation at the production site.
[0018]
18. Installation for the production of liquefied natural gas (10), according to claim 17, characterized by the fact that a first refrigerant compressor (82) of the second refrigerant compression module (72) is disposed in the first uncovered section (48) and a second refrigerant compressor (84) of the second refrigerant compression module (72) is disposed in the second uncovered section (50).
[0019]
19. Liquefied natural gas production facility (10) according to claim 18, characterized by the fact that one or both of the first and second compressors (82, 84) is / are a variable speed compressor or are / are driven by an aero-derivative gas turbine.
[0020]
20. Plant for the production of liquefied natural gas (10), according to any one of claims 10 to 19, characterized by the fact that the first refrigerant is propane.
[0021]
21. Plant for the production of liquefied natural gas (10) according to any one of claims 16 to 20, characterized by the fact that the second refrigerant is a mixture of mixed refrigerant hydrocarbons.
[0022]
22. Liquefied natural gas production facility (10) according to any one of claims 1 to 21, characterized by the fact that each of the plurality of modules (18) is substantially equal in size.
[0023]
23. Liquefied natural gas production facility (10) according to any one of claims 1 to 22, characterized by the fact that each of the plurality of modules (18) has a weight in the range of 2000 to 8000 tons or 3000 to 4000 tons.
[0024]
24. Liquefied natural gas production installation (10) according to any of claims 10 to 19, characterized by the fact that the production site is onshore, offshore in a floating installation, offshore in a fixed installation, installation of barge-mounted or landed.
[0025]
25. Liquefied natural gas production facility (10) according to any one of claims 1 to 24, characterized by the fact that heat exchangers (29) are air-cooled heat exchangers.
[0026]
26. Method of designing or constructing a liquefied natural gas production facility (10), the method comprising the steps of: providing a plurality of modules (18) for installation at a production site (20) to form a train production line (12) having a main axis (14) and a minor axis (16), each module (18) having a base module (22) for the assembly of a plurality of equipment (46, 54, 56) associated with a selected function assigned to said module (18), the base module (22) having a main axis (26) and a minor axis (28); and, organizing a plurality of heat exchangers (29) to run parallel to the main axis (14) of the production train (12), to form a heat exchanger bank (30) having a main axis (32) and a minor axis (34), where the main axis (34) of the seat (30) is parallel to the main axis (14) of the train (12); characterized by spacing the modules (18) and organizing a subset (36) of the plurality of heat exchangers (29) in a first level (38) vertically displaced from the base (22) of at least one module (18) to form a partially covered module (40); and, organize the main axis (26) of the partially covered module (40) to be perpendicular to the major axis (14) of the train (12) when the partially covered module (40) is installed at the production site.
[0027]
27. Method according to claim 26, characterized by the fact that the heat exchanger bank (30) has a footprint and the base (22) of the partially covered module (40) projects transversely outwardly beyond the footprint of the exchanger bank heater (30) to provide a bare section (42) of the base module (22) on a first side (44) of the heat exchanger seat (30) and, where the bare section (42) of the base module (22) it is dimensioned for the assembly of a selected part of the process equipment (46, 54, 56).
[0028]
28. Method according to claim 26, characterized by the fact that the heat exchanger bank (30) has a footprint and the base (22) of the partially covered module (40) projects transversely outwardly beyond the footprint of the exchanger bank heat (30) to provide a first bare section (48) of the base module on a first side (44) of the heat exchanger seat and a second session (50) bare of the base module (22) on a second side (52) of the heat exchanger bench (30), where the first bare section (48) is dimensioned for the assembly of a first selected piece of process equipment (54) and the second bare section (50) is dimensioned for the assembly of a second selected part of the process equipment. (56)
[0029]
29. Method according to claim 27 or 28, characterized by the fact that one or both or the first and second selected pieces of equipment (46, 54, 56) is / are one or more among: a rotating piece of equipment associated with a circulating refrigerant; a piece of equipment having a flammable inventory; a piece of equipment long-term wait time; a piece of equipment having an overall height that is higher than the height of the first level (38).
[0030]
30. Method according to any one of claims 26 to 29, characterized in that at least one of the plurality of modules (18) is built on a construction site or assembled at an assembly site prior to its transport to the production site (20) and where at least one module (18) is tested for verification at the assembly or construction site.
[0031]
31. Method according to any one of claims 26 to 30, characterized by the fact that the heat exchanger bank (30) is arranged such that a subset (36) of the plurality of heat exchangers (29) of a module ( 64) is arranged on a first level (38) vertically displaced from the base (22) of said module (64) and an adjacent module (70).
[0032]
32. Method according to any one of claims 26 to 31, characterized in that each of the plurality of modules (18) is a partially covered module (40).
[0033]
33. Method according to any of claims 26 to 31, characterized in that in the subset (36) of heat exchangers (29), at least one module (18) has a footprint that covers at least 90% of the footprint of the base module to form a fully covered module (60) having a main axis (26) and a minor axis (28), the main axis (26) of the fully covered module (60) being arranged to be parallel to the main axis ( 14) of the train (12) when the fully covered module (60) is installed at the production site (20).
[0034]
34. Method according to any of claims 26 to 33, characterized in that one of the plurality of modules is a pretreatment module (18) (62) for removing contaminants from a gas supply stream to produce a pre-treated natural gas stream.
[0035]
35. Method according to claim 34, characterized in that the pretreatment module (62) is a partially covered module (40) having a first uncovered section (48) of the base (22) on a first side (44) of the heat exchanger bank (30) and a second uncovered section (50) of the module (62) on a second side (52) of the heat exchanger bank (30) after installation at the production site (20).
[0036]
36. Method according to any of claims 26 to 35, characterized in that one of the plurality of modules (18) is a first refrigerant condenser module (64) for pre-cooling a pre-treated gas stream to produce a flow of pre-cooled gas and a first flow of refrigerant vapor.
[0037]
37. Method according to claim 36, characterized by the fact that the first refrigerant condenser module (64) is a fully covered module (60).
[0038]
38. Method according to any of claims 26 to 35, characterized in that one of the plurality of modules (18) is a first refrigerant gas compression module (66) for compacting a first flow of refrigerant vapor to produce a first compressed refrigerant stream to recycle to a first refrigerant condenser module (64).
[0039]
39. Method according to claim 38, characterized in that the first refrigerant compression module (66) is a partially covered module (40) having a first bare section (48) of the base on a first side (44) of the heat exchanger seat (30) and a second bare section (50) of the module (66) on a second side (52) of the heat exchanger seat (30) after installation at the production site (20).
[0040]
40. Method according to any one of claims 26 to 39, characterized by the fact that one of the plurality of modules (18) is a liquefaction module (70) operatively associated with a main cryogenic heat exchanger (68) for additionally chilling a flow of pre-cooled gas through indirect heat exchange, with a second refrigerant to produce a flow of liquefied natural gas product and a second flow of refrigerant vapor.
[0041]
41. Method according to claim 39, characterized by the fact that the liquefaction module (70) is a partially covered module (40) having a first uncovered section (48) of the base (22) on a first side (44) ) of the heat exchanger bank (30) and a second bare section (50) of the module on a second side (52) of the heat exchanger bank (30) after installation at the production site (20).
[0042]
42. Method according to any of claims 26 to 39, characterized in that one of the plurality of modules (18) is a second refrigerant compression module (72) for compressing a second flow of refrigerant vapor to produce a second compressed refrigerant flow to recycle to a main cryogenic heat exchanger (68).
[0043]
43. Method according to claim 42, characterized in that the second refrigerant compression module (72) is a partially covered module (40) having a first bare section (48) of the base (22) on a first side (44) of the heat exchanger bank (30) and a second uncovered section (50) of the module on a second side (52) of the heat exchanger bank after installation at the production site (20).
[0044]
44. Method according to claim 43, characterized in that a first refrigerant compressor (82) of the second refrigerant compression module (72) is disposed in the first uncovered section (48) and a second refrigerant compressor (84) of the second refrigerant compression module (72) is disposed in the second uncovered section (50).
[0045]
45. Method according to claim 44, characterized in that one or both of the first and second compressors (82, 84) is / are a variable speed compressor or driven by an aero-derivative gas turbine.
[0046]
46. Method according to any one of claims 36 to 45, characterized in that the first refrigerant is propane.
[0047]
47. Method according to any one of claims 43 to 46, characterized in that the second refrigerant is a mixture of mixed refrigerant hydrocarbons.
[0048]
48. Method according to any one of claims 26 to 47, characterized in that each of the plurality of modules is substantially equal in size.
[0049]
49. Method according to any one of claims 26 to 48, characterized in that each of the plurality of modules has a weight in the range of 2000 to 8000 tons or 3000 to 4000 tons.
[0050]
50. Method according to any one of claims 26 to 49, characterized by the fact that the production site (20) is onshore, offshore in a floating installation, offshore in a fixed installation, barge-mounted or grounded installation .
[0051]
51. Method according to any of claims 26 to 50, characterized in that the heat exchangers are air-cooled heat exchangers.

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BR102013022719A2|2014-10-29|PROCESS TO LIQUIDATE HYDROCARBON FRACTION

US20190316856A1|2019-10-17|Liquid drains in core-in-shell heat exchanger

AU2013202033A1|2014-10-16|Modular lng production facility

AU2017419936A1|2019-09-12|Natural gas liquefaction device

ES2675592T3|2018-07-11|Method and apparatus for liquefaction of natural gas

JP2020159647A|2020-10-01|Natural gas liquefaction device

KR20120005158A|2012-01-16|Method and apparatus for liquefying natural gas

WO2020075295A1|2020-04-16|Natural gas liquefaction device

AU754108B2|2002-11-07|Liquefaction apparatus

US20200041202A1|2020-02-06|Module for natural gas liquefier apparatus and natural gas liquefier apparatus

WO2019222815A1|2019-11-28|A hydrid modular lng production facility

同族专利:

公开号 | 公开日

CN103629893A|2014-03-12|

AP3298A|2015-05-31|

IL223302A|2016-05-31|

AP2012006571A0|2012-12-31|

EP2718647A4|2016-01-20|

BR112012030313A2|2017-01-24|

AU2012216352A1|2014-03-13|

US10539361B2|2020-01-21|

EP2718647A1|2014-04-16|

US20140053599A1|2014-02-27|

CA2794218A1|2014-02-22|

KR101915007B1|2018-11-05|

WO2014028961A1|2014-02-27|

CA2794218C|2017-03-28|

KR20150054018A|2015-05-20|

AU2012216352B2|2015-02-12|

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法律状态:
2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

2020-11-17| B09A| Decision: intention to grant|

2020-12-29| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 27/09/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

AU2012216352A|AU2012216352B2|2012-08-22|2012-08-22|Modular LNG production facility|

AU2012216352|2012-08-22|

PCT/AU2012/001163|WO2014028961A1|2012-08-22|2012-09-27|Modular lng production facility|

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