• 专利附录
  • 专利说明
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    • 专利摘要:
    CONTACT TRAY FOR A MASS TRANSFER COLUMN. The present invention relates to a valve cover having a guide vane that extends laterally and downwardly from the direction of the central portion and in spaced relation to the floor of the tray to deflect most of the steam that passes upwards. through a hole down to the floor of the tray. A drag device with a deflector angled downwards in vertical alignment with a hole in the tray floor may or may not be integrated with the valve cover below the tray floor.
    公开号:BR112012028808B1
    申请号:R112012028808-3
    申请日:2011-04-29
    公开日:2021-05-25
    发明作者:Mark W. Pilling；Stefan Tobias Hirsch；Markus Friedrich Fischer
    申请人:Sulzer Management Ag；
    IPC主号:
    专利说明:

    [001] The present invention relates to a contact tray for a mass transfer column. More particularly, this invention refers to a valve cover for a contact tray for a mass transfer column. Even more particularly, this invention relates to a contact tray for a mass transfer column comprising at least one drag device.
    [002] As you know, the various types of mass transfer columns were built with contact trays that are arranged along the height of the column in spaced relationship with the holes arranged along the trays. In most cases, the trays are arranged so that liquid arriving from below can be routed through each tray and from tray to tray in a zigzag fashion along the height of the column through drop tubes of a side of each tray as rising steam passes through the holes so that liquid and steam can enter a mass transfer or heat transfer operation. In other cases, the trays have been made as circular dual-flow trays so that steam and liquid compete for travel through the holes in each direction. On large columns with high liquid rates, multiple downpipes and multiple tray floor zones are used at each tray elevation.
    [003] In some cases, as described in US patents 3,463,464 and 6,588,736, fluid deflector members are located directly above each hole of a floor tray in order to prevent liquid from passing under the vapor holes formed by inserting it into the trays. As described, the deflection members are integrally formed from the trays. While a tray of this type is relatively strong due to the integral construction of the deflector members within the floor of the tray, the lifting heights of the deflector members, particularly in brittle materials, were limited. That is to say, since the formation of the deflection members requires the material to stretch to a length greater than the depth of the material, the combination of significant elongation and brittle material can cause the deflection members to break during the process of formation.
    [004] US patents 5,911,922 and 5,762,834 describe bridge members that can be mounted through the holes of a contact tray and that function as movable valves. These bridge members have required grooves to be formed in the contact tray adjacent to a hole in order to mount the legs of the bridge members. As a result, the bridge members were quite cumbersome to install.
    [005] US patent 5,360,583 describes fluid deflector members that are integral with a tray, as well as a fluid deflector component that is movable relative to a tray and has limited footing to limit upward movement relative to a tray. pavement. However, such construction is difficult to install.
    [006] US patent 7,540,477 describes a tray valve for a tray column that is of relatively simple construction.
    [007] SU 1369740 describes a mist eliminator that depends on a series of devices with two coupled trays.
    [008] The mass transfer columns were also built with contact trays that cooperate with the drag collection drag devices, i.e. liquids transported with the steam upwards from a floor of the tray opposite the direction desired, before the drag hits the floor of the tray above and distributes the drag back to the floor of the tray below.
    [009] Thus, it is an object of the invention to provide a valve cover for a contact tray of relatively simple construction. It is another object of the present invention to increase the capacity of the tray that contains the valve caps. It is another object of the invention to improve the drag resistance of a tray from a tray column. It is another object of the invention to provide a valve cover that can be easily mounted on a tray. It is another object of the invention to provide a valve cover, which can be fixedly mounted on a floor of the tray or allowed to move up and down relative to a floor of the tray.
    [0010] Briefly, the invention provides a contact tray for a mass transfer column composed of a tray floor having a plurality of holes for passage through it by an upward steam and a plurality of valve caps positioned over the holes for control the passage of steam.
    [0011] Typically, a plurality of horizontal tray floors are arranged in spaced vertical relationship within a tower and means are provided to direct a flow of liquid laterally through each tray floor in a sequential manner from top to bottom of the tower.
    [0012] In one embodiment, each said valve cover is mounted over one of said respective holes and having a central portion disposed in spaced relationship to said tray floor and along a respective hole and at least one guide vane extending one sideways and downwards from said central portion towards said tray floor to deflect at least a part of the rising steam through a respective hole towards said tray floor.
    [0013] At least some of said valve covers may have a pair of legs extending from opposite ends of said central portion on said tray floor and a pair of panels, each said panel extending between one of the respective pairs. of legs and said guide vane for deflecting a part of the rising steam through a respective hole towards said floor of the tray. Furthermore, each of said valve covers may have means for surrounding said tray floor to prevent lifting of the respective said valve cover from said tray floor. Said means may include a deformable tab which extends from at least one of said legs through a slot in said tray floor to abut an underside of said tray floor.
    [0014] In one embodiment, each said valve cover may have means for engaging said tray floor to allow lifting of the respective valve cover from said tray floor by a predetermined amount.
    [0015] Said means may include a pair of extensions, each said extension extending from a respective leg of said pair of legs, each said extension including a first portion to pass through said hole of said floor, a second portion extending downwardly from said first portion and toward a second portion of the other said pair of extensions and a U-shaped portion extending upwardly from said second portion and defining a pair of teeth spaced apart from the said tray floor a predetermined distance to abut an underside of said tray floor in response to lifting of said valve cover relative to said tray floor.
    [0016] A contact tray according to any of the embodiments may further comprise an opening in a selected one of said central portion and said legs for the passage of steam therethrough. Furthermore, each of said valve caps may have a pair of guide vanes extending laterally and downwardly from opposite sides of said central portion towards said tray to deflect at least a portion of the rising steam through a respective hole towards said tray. In addition or as an alternative, each said valve cap may have a plurality of panels, each said panel may extend between one of said respective pairs of legs and one of said respective guide vanes to deflect a portion of the rising steam through. a respective hole for said floor of the tray.
    [0017] A contact tray according to any of the modalities may further comprise a plurality of trailing devices, each said trailing device may extend from a respective valve cover below said tray floor and may include a deflector in vertical alignment with a respective hole in said tray floor. Furthermore, said deflector may be downwardly angled and may include a pair of longitudinally extending blades disposed in angular relation to each other. Additionally or alternatively said baffle may be disposed horizontally and may include a plurality of grooves and at least one finger angled downwards within each groove.
    [0018] Furthermore, each drag device may have a vertically disposed leg connecting said deflector to a respective valve cover.
    [0019] A contact tray according to any of the embodiments can be further configured such that each said hole in said tray floor has a central section and at least a pair of end sections of less width than said center section extending from opposite ends of said center section and each of said valve caps may have a pair of legs slanted at opposite ends, each said leg of each said valve cap extending to a respective section. end of a respective hole.
    [0020] The tray floor of a contact tray according to any of the embodiments may include at least one groove adjacent to a respective hole and each said valve cover may have a leg extending from said central portion in the said slot.
    [0021] A valve cover for a mass transfer column according to the invention comprises a central portion for spaced arrangement in relation to an orifice for the passage of an upward flow of steam in a floor of the tray; a pair of legs extending downwardly from opposite ends of said central portion; and at least one guide vane extending laterally and downwardly from said central portion to deflect at least a part of the rising steam through a respective hole towards said floor of the tray.
    [0022] The valve cover may further comprise a pair of panels, each said panel extending between a respective pair of legs and said guide vane to divert a portion of the rising steam through a respective hole to the floor of the tray.
    [0023] Alternatively or in addition, each valve cap may comprise a first opening in said central portion and a second opening in one of said legs. The valve cover may further comprise a deformable tab extending from at least one of said legs for passage through a groove in a tray floor to abut an underside of the tray floor upon deformation thereof. .
    [0024] The valve cap may further comprise a pair of dependent extensions, each said extension including a first portion to pass through said orifice of said floor, a second portion extending downwardly from said first portion and a second portion towards the other said pair of extensions and a U-shaped portion extending upwardly from said second portion and defining a pair of teeth spaced from said tray floor and a predetermined distance to abut an underside of the said tray floor, in response to lifting of said valve cover relative to said tray floor.
    [0025] Furthermore, each said U-shaped portion may be directed upwards in an outward direction from the U-shaped portion of the other said pair of extensions.
    [0026] In one embodiment, a valve cap may further comprise a pair of guide vanes extending laterally and downwardly from opposite sides of said center portion and a plurality of panels, each said panel may extend between a respective pair of legs and a respective guide vane to deflect a part of the rising steam through a respective hole for the floor of the tray.
    [0027] In one embodiment, a valve cap may further comprise a trailing device that extends downwardly from one of said legs. The drag device may have a deflector angled downwards in vertical alignment with said central portion. The deflector may include a pair of longitudinally extending blades disposed in angular relationship to each other. Furthermore, the drag device may have a vertically disposed leg connecting said deflector to one of said legs.
    [0028] In one embodiment, a drag device for a mass transfer column comprises a downwardly angled baffle for positioning in vertical alignment below a hole in a tray floor, said baffle having at least one blade that extends longitudinally disposed in angular relation to a horizontal plane and a vertical plane, and at least one vertically disposed leg extending from said baffle for mounting said baffle below a floor of the tray. Said deflector may include a pair of blades arranged in angular relation to each other.
    [0029] In one embodiment, a drag device for a mass transfer column comprises a horizontally disposed deflector for positioning in vertical alignment below a hole in a tray floor, said deflector being fenestrated with a series of slit bars and fingers angled downwardly in alignment with said slits, and at least one vertically disposed leg extending from said baffle for mounting said baffle below a floor of the tray. Said fingers may be arranged in two lines with fingers in one line being oppositely disposed to said fingers in the other of said two lines.
    [0030] In one embodiment, the invention further comprises a combination including a tower disposed on a vertical axis; and a plurality of horizontal tray floors disposed in vertical relationship spaced apart within said tower for receiving flows of liquid therein, each said tray floor having a plurality of holes for passage of an upward vapor therethrough; and a plurality of valve covers mounted on each respective floor of the tray, each said valve cover having a central portion disposed in spaced relationship to a respective hole in a respective floor of the tray and at least one guide vane that extends laterally and downwardly from said central portion towards and in spaced relation to said respective tray floor to deflect at least a part of the rising vapor through a respective hole towards said respective tray floor.
    [0031] The combination may further comprise a plurality of drag devices, each of said drag device extending from a respective valve cover below a respective tray floor and having a deflector in vertical alignment with a respective hole on said respective floor of the tray. Alternatively or in addition, each drag device may have a vertically disposed leg connecting said deflector to one of said legs of a respective valve cap.
    [0032] Each valve cover is mounted on the tray floor and can be of any suitable shape, such as a multi-string shape or a semi-circular shape. For example, a preferred form is a valve cap having a central portion disposed in spaced relationship to the floor of the tray and along a respective hole and a pair of legs extending from opposite ends of the central portion to the floor of the tray.
    [0033] According to the invention, each valve cover has at least one guide vane extending laterally and downward from the central portion towards the tray floor to deflect at least a part of the rising steam through of a respective hole for the floor of the tray. These vanes direct the steam flow more laterally and into the liquid over the tray floor and have been found to unexpectedly produce a significant increase in the capacity of the tray containing these valves.
    [0034] Each valve body can be made of solid construction, i.e. without holes, or with one or more holes, for example with an opening in the center portion and/or an opening in the leg in front of the valve cap.
    [0035] In one embodiment, the valve covers and tray floor holes are constructed as described in US 2009/0134533, the description of which is incorporated herein, and the valve covers are provided with a guide vane on each side side of the central portion which extends laterally and downwards towards the floor of the tray to deflect at least a part of the rising steam through a respective hole to the floor of the tray.
    [0036] In another embodiment, the valve cover is provided with means for engaging the floor of the tray to prevent lifting of the valve cover from the floor of the tray. For example, this means may be a deformable spacer which extends from at least one of the angled portions through a groove in the tray floor to abut an underside of the tray floor when deformed as being twisted.
    [0037] The valve cover may also be provided with means for engaging the floor of the tray to allow lifting, i.e. an up and down movement of the valve cover from the floor of the tray by a predetermined amount. This means may be an extension extending from each leg and includes a first portion extending through the hole in the floor, a second portion extending downwardly from the first portion and towards a second portion and defining a pair of teeth spaced from the floor of the tray a predetermined distance to abut one side under the floor of the tray in response to elevation of the valve cover relative to the floor of the tray.
    [0038] In another embodiment, valve covers are provided with panels between the guide vanes and the adjacent cover leg to provide a more uniform flow of steam from the sides of the valve cover and down to the tray floor .
    [0039] The invention also provides a drag device having a downward sloping deflector for positioning in vertical alignment below a hole in the tray floor to collect the drag before the drag hits the tray floor and distribute the drag back to the floor of the tray below.
    [0040] In one embodiment, the deflector can be formed from the hole in the floor of the tray.
    [0041] In another embodiment, the deflector may be formed of a pair of longitudinally extending blades that are arranged in angular relationship to each other. The slope of the blades is such that liquid drains out of the tray floor from below thus helping to carry the liquid forward on this tray floor. In this embodiment, the deflector may have a vertically disposed leg that connects the deflector to one of the legs of a valve cap to form a one-piece structure.
    [0042] Such a one-piece structure can be readily mounted in a hole in the tray floor by first passing the baffle through the hole and then transforming the frame to position the valve cover along the hole. When the one-piece frame has a valve cover, as described in US 2009/0134533, the slanted legs of the valve cover from which the deflector extends can be positioned within a section of the end of the orifice. When the one-piece frame has a valve cover with a deformable separator at the end of a leg, the separator can be passed through a groove provided for them in the floor of the tray. The deformable guide can then be twisted to secure the one-piece frame to the tray floor. In this case, only one leg of the valve cap has a deformable flap.
    [0043] In another embodiment, the deflector may have a pair of legs extending vertically disposed from the deflector for mounting the deflector directly to the tray floor.
    [0044] These and other objects and advantages of the invention will become more evident from the following details and description, taken in conjunction with the accompanying drawings in which:
    [0045] Figure 1 illustrates a perspective view of a section of a tray floor with a valve cover according to the invention;
    [0046] figure 2 illustrates a view taken on line 2 - 2 of figure 1;
    [0047] Figure 3 illustrates a perspective view of the part of a contact tray modified according to the invention;
    [0048] Figure 4 illustrates a bottom view of the contact tray of Figure 3;
    [0049] Figure 5 illustrates an exploded view of a valve cover and tray floor with a schematic indication of the steam flow directions from the valve cover;
    [0050] Figure 6 is a simulation of a steam flow pattern through a valve cap according to the invention;
    [0051] Figure 7 illustrates a perspective view of a valve cover and integrated drag device according to the invention;
    [0052] Figure 8 illustrates a perspective view of a modified valve cover according to the invention;
    [0053] Figure 9 illustrates a perspective view of the valve cap of Figure 8, with an integrated drag device, in accordance with the invention;
    [0054] Figure 10 illustrates a perspective view of a modified drag device according to the invention;
    [0055] Figure 11 illustrates a schematic view of a tower nailing a series of vertically arranged contact trays, according to the invention;
    [0056] Figure 12 illustrates a perspective view of a modified valve cover with panels on a tray floor according to the invention;
    [0057] Figure 13 illustrates a perspective view similar to Figure 12 of a valve cover modified with larger panels, according to the invention;
    [0058] Figure 14 illustrates an exploded perspective view of a valve cover and tray in which the valve cover is mounted on the tray to be movable up and down according to the invention; and
    [0059] Figure 15 illustrates a side view of the valve cover of Figure 14 in place of the tray floor of Figure 14.
    [0060] Referring to figure 11, the tower 10 is arranged on a vertical axis and is constructed in a conventional manner. As indicated, tower 10 contains a plurality of horizontally disposed contact trays 11 which are disposed along the height of column 10 in vertical relationship, spaced apart from one another, and a plurality of downpipes 12. Downpipes 12 are constructed. in a conventional manner to communicate one side of a respective contact tray 11 with an opposite side of the contact tray 11 immediately below, in order to direct a flow of liquid 13 horizontally along the respective contact trays in a zigzagging manner. zag. In some cases, there may be more than one downpipe per tray 11.
    [0061] With reference to figures 1 and 2, each contact tray 11 has a tray floor 14 having a plurality of holes 15 for the passage through it of an upward steam for mass transfer or for heat transfer with the liquid as well as a plurality of valve caps 16 to prevent liquid from passing through ports 15 and to direct steam flow laterally in ports 15.
    [0062] Each hole 15 is molded as described in US 2009/0134533 with a center section 17 and a pair of smaller width rectangular end sections 18 extending from opposite ends of the center part 17.
    [0063] Each valve cover 16 is mounted over a respective hole 15 and has a central portion 19 disposed in spaced relation to the floor of the tray 14 and along a respective hole 15 and a pair of legs 20 extending from of opposite ends of the center portion 19 in a slanting fashion to the floor of the tray 14. Each leg 20 has a reduced end section forming a tab 21 which fits into an end section 18 of a hole 15.
    [0064] The center section 17 of a hole 15 is trapezoidal in shape. In this case, one leg 20 of the valve cover 16 is narrower than the other leg 20 and positioned on the downstream side of the orifice 15 with respect to the liquid flow F (see figure 1). Therefore, the steam leaving valve cover 16 has a lightweight component that helps to push liquid movement across the floor of tray 14. This appears to aid in capacity efficiency and perhaps force a slug of liquid through floor 14 .
    [0065] With reference to figures 1 and 2, each valve cover 16 is provided with one or more guide vanes 22 on the side of the central portion 19 extending laterally and downwards from the central portion 19 in the direction and in relation spaced from the floor of the tray 14 to deflect at least a part of the rising steam through a respective hole 15 to the floor of the tray 14, as indicated by arrows 28 in Figure 5 and the simulation of Figure 6.
    [0066] Referring to Figure 3, in which similar reference characters indicate similar parts as above, the floor of the tray 14 can be made with holes 15 of trapezoidal or rectangular shape with slots 25 disposed adjacent to the two ends and each cover of the valve 16' has a central portion 19, a pair of legs 20 at opposite ends of the central portion 19 which slopes towards the floor of the tray 14 and a pair of flaps 21, each of which extends vertically from the end of a slanted leg 20 to pass through a slot 25 in the tray floor 14 adjacent to hole 15.
    [0067] As indicated in figure 4, each hole 15 is trapezoidal in shape. In this case, as above, the leg 20 of the valve cap 16' is narrower than the other leg 20 and positioned on the downstream side of the orifice 15 with respect to the liquid flow direction F. Thus, the vapor leaving the cap valve 16' has a lightweight component that helps push liquid movement across the floor of tray 14.
    [0068] Alternatively, each hole 15 may be rectangular in shape with the size being the equivalent of a circular hole of about 15 mm to 20 mm.
    [0069] Referring to figure 4, each valve cap 16' also has means, for example in the form of a T-shaped deformable flap 21' extending from a leg 20, to enclose the lower part. of the floor of tray 14 to prevent lifting of the valve cover 16' from the floor of tray 14. In this modality, the deformable flap 21' is twisted to engage the underside of the floor of the tray 14.
    [0070] As shown in Figures 3 and 4, each valve cover 16' has an opening 26 in the central portion 19 and an opening 27 in the slanted leg 20 at the front (downstream side) of the valve cover 16'. Alternatively, the valve cover 16' can be made without holes, i.e. of solid construction, as indicated in figures 5 and 6.
    [0071] With reference to figures 1 to 4, each valve cover 16, 16' is provided with one or more guide vanes 22 on the side of the central portion 19 which extends laterally and downwards from the central portion 19 in the direction and in spaced relation to the floor of the tray 14 to deflect at least a part of the rising vapor through a respective hole 15 to the floor of the tray 14, as indicated by arrows 28 in Figure 5 and in the simulation of Figure 6.
    [0072] As indicated in figure 6, the guide vanes 22 are constructed so as to direct most of the steam that passes upwards through a hole 15 downwards towards the floor of the tray 14. For this purpose, the width of each guide vane 22 is an important fraction of the width of the central portion 19 and approximately 1/3 of the width of a hole 15, eg the width of a guide vane 22 is 15 mm.
    [0073] Furthermore, each guide vane 22 is spaced from the floor of tray 14 by a distance of a range of 3 mm to 10 mm, with a preferred range of 3 to 5 mm.
    [0074] Experimental results have shown that by reorienting the flow of steam from the valve cover 16, a substantial improvement in capacity can be achieved. Specifically, an improvement of about 15% can be seen with the configuration of the tray 14 floor and valve cover 16 of figure 1.
    [0075] As indicated in Figure 5, where similar reference characters indicate similar parts as above, each guide vane 22 slopes evenly towards the floor of tray 14 and has a parallel edge free and spaced from from the floor of the tray 14. The steam thus diverted exits under the guide vane 22 in a direction as indicated by the transverse arrow 28, i.e. perpendicular to the flow of liquid over the floor of the tray 14, which is from left to right in the figure 2.
    [0076] In another embodiment, the guide vanes 22 can be bent in such a way as to direct the outgoing steam under the guide vane in a forward direction so that outgoing steam moves in the direction of the liquid flow. For example, the guide vane may extend laterally outward from the central portion 19 of the valve cover 16 and the end portion of the guide vane may be bent or curved down over an angularly disposed fold line throughout the twist. In such a case, the dependent end portion would have a greater length on one side than the other side and would be spaced from the floor of tray 14 by a smaller amount on one side than the other side. Alternatively, the dependent end portion may be made to be equally spaced from the tray 14 floor along the width thereof, providing a bypass wall to deflect steam forward along the tray 14 floor.
    [0077] Guide vanes 22 may be employed on any suitable valve cover, including, but not limited to, the valve cover embodiments described in US 2009/0134533.
    [0078] Furthermore, a drag device can be employed with any of the aforementioned valve caps. For example, referring to Figure 7, each valve cap 16' can be integrated with a drag device 29 to a one-piece structure. As illustrated, the drag device 29 extends downwardly from one of the slanted legs 20 and includes a vertically disposed leg 30 integral with the dependent guide 21 of the leg 20 that extends across the floor of the tray 14. In this case, tab 21 is not deformable. The drag device 29 can also be manufactured so as to extend downwards from both of the slanted legs 20.
    [0079] The drag device 29 also has a low deflector angle 31 integral with the lower part of the leg 30 which is arranged in vertical alignment with a hole 15 in the floor of the tray 14 and in the central portion 19 of the valve cover 16'. Deflector 31 is positioned to collect the drag before the drag hits the floor of tray 14 above and distributes the drag back to the floor of tray 14 below (not shown).
    [0080] In the illustrated embodiment, the deflector 31 is formed of a pair of longitudinally extending blades 32 that are arranged in angular relationship to each other. Alternatively, the deflector can be formed from a single blade 32 which is arranged at an angle to a horizontal plane and an angle to a vertical plane, for example by eliminating one of the blades 32 from the deflector 31.
    [0081] The integrated structure of the valve cover 16' and the drag device 29 can be easily mounted in a hole 15 of the floor of the tray 14, passing the deflector 31 first through the hole 15 and then transforming the structure to position the valve cover 16' along the hole 15. The deformable tab 21 of the valve cover 16' is passed through the slot 25 provided thereto in the floor of the tray 14 and twisted to secure the frame to the floor of the tray. 14.
    [0082] With reference to figures 8 and 9, in which similar reference characters indicate similar parts as above, in another embodiment, the valve cover 16'' may be constructed of a central portion 19 and a pair of legs 20 , having a sloping portion extending from the central portion 19 and a spacer 33 extending perpendicularly from the sloping portion to pass through the floor of the tray 14. In order to prevent the valve cover 16'' from being blown of the floor of tray 14, each guide 33 is provided with an outwardly extending barb 34 to engage with tray 11 when in place. In this mode, a drag device 29 extends down from a guide 33 and below the hole.
    [0083] Referring to figure 9, in this embodiment, the flap 33 can be elongated to form the vertical leg 30 of the drag device 29 or it can be detached joined to the vertical leg 30 of the drag device 29.
    [0084] Referring to Figure 10, the drag device 29' can be made with a horizontally disposed deflector 31' of rectangular shape that is fenestrated to have a series of bars 35 separated by grooves 36 and pairs of downwardly sloping fingers 37 within each slot 36, arranged opposite each other. As indicated, fingers 37 are cut from deflector 31' to form slots 36. In this embodiment, horizontally disposed deflector 31' is vertically aligned under a hole 15 in the floor of tray 14 to shade hole 15 and the drag collects. over the surfaces of the deflector 31' and travels along and down the respective fingers 37 to descend onto the tray below.
    [0085] As shown in Figure 10, a pair of fingers 37 is cut from the deflector 31' to form a single groove 36 with the fingers 37 disposed in opposite directions relative to each other. As shown, the fingers 37 are arranged in two rows, with the fingers 37 of one row being oppositely arranged to the fingers 37 of the other of the two rows. Alternatively, fingers can be directed in the same direction. In this last modality, each finger would form a single groove.
    [0086] As described above, the horizontally disposed deflector 31' may extend from a single vertically disposed leg that is integrated with a guide 21 in a leg 20 of a valve cover 16 or, as illustrated, may be suspended by a pair of legs 38 integral to a floor from the tray 14 above.
    [0087] The valve covers 16 containing the vane, when combined with the drag devices 29 have been found to achieve an 18% improvement in air/water capacity showing that the benefits of both of these valve modifications are essentially cumulative.
    [0088] Referring to Figure 12, in which similar reference characters indicate similar parts as above, the valve cover 16 is provided with a plurality of panels 39, each of which extends between a respective leg 20 and a respective one. guide vane 22 for deflecting a part of the rising steam through a hole 15 into the floor of the tray 14.
    [0089] By closing the otherwise open bends between the guide vane 22 and the legs 20, a more uniform steam flow of steam out of the valve cover 16 must be achieved, along with the direction of steam down to the tray 14 floor.
    [0090] As indicated in Figure 12, each panel 39 is triangular in shape and extends along the height of the guide vane 22, i.e. the extension of the guide 22 from the central portion 19, and along half the height of a leg 20, i.e. the extension of the leg 20 from the central portion 19 to the floor surface of the tray 14.
    [0091] Alternatively, as indicated in Figure 13, where similar reference characters indicate similar parts as above, each panel 39' is triangular in shape and of a greater extent than panel 39 of Figure 12. That is, each panel 39' extends along the height of the guide vane 22, i.e. the extension of the guide 22 from the central portion 19, and substantially along the height of a leg 20, i.e. the extension of the leg 20 from the central portion 19 to the floor surface of the tray 14, leaving a small space 40.
    [0092] Referring to figures 14 and 15, in which similar reference characters indicate similar parts as above, the valve cover 16 is constructed in a similar manner to the valve cover 16 of figure 13 and is provided with means for engaging the floor of tray 14 to allow lifting, i.e., an upward and downward movement, of the valve cover 16 from the floor of tray 14 by a predetermined amount. As illustrated, this means includes a pair of dependent extensions 41 that extend from legs 20 to pass through a hole 15 in the floor of tray 14.
    [0093] As indicated in Figure 15, each extension 41 has a first portion 43 that passes through the floor of tray 14 and which is perpendicular to the floor of tray 14, a second narrower portion 44 that extends downwards from the first portion 43, through hole 15 and angularly relative to the second portion of the other extension 41 and a U-shaped portion 45 extending upwardly from the second portion 44.
    [0094] As illustrated, the first portion 43 of each extension 41 is sized to pass through the floor of tray 14, while the guide vane 22 rests on the floor of tray 14. As shown, each portion 43 is rectangular in shape.
    [0095] The second portion 44 of each extension 41 is rectangular in shape and extends inwardly under the floor of the tray 14 to form a "diamond" shape with the valve cap 16. This configuration of the extensions 41 prevents lift valve cover 16 off the floor of tray 14 after it has been installed.
    [0096] The third U-shaped portion 45 of each extension 41 extends upwards at a different angle from the second portion 44, for example in an outward direction from the U-shaped portion 45 of the other extension 41 Each U-shaped portion 45 is of a width to pass through hole 15 and defines a pair of prongs 46 to abut an underside of the floor of tray 14 in response to elevation of the valve cap 16 relative to the floor. from tray 14.
    [0097] As shown in figure 14, a small transition section 47 is disposed between the two portions 44, 45 to facilitate the bending of the U-shaped portion at an angle different from that of the second portion 44. Referring to figure 14, in order to install the valve cover 16, the lower ends of the U-shaped portions 45 are passed through hole 15 in the floor of tray 14. As extensions 41 pass through the hole, teeth 46 flex. inward towards each other. After passing the U-shaped portions 45 through the hole 15, the teeth 46 are allowed to deflect back to the original shape, thus forming a stop to prevent lifting of the valve cover 16 off the floor of the tray 14. Once the valve cover 16 is in place, the guide vanes 22 of the valve cover 16 are fitted to the floor of tray 14 and teeth 46 are spaced from the underside of the floor of tray 14.
    [0098] During the operation of a tower, an upward flow of steam through orifice 15 lifts the valve cover 16 from the floor of the tray 14 until the moment when the teeth 46 make contact with the underside of the floor of the tray 14 thus limiting the lifting of the valve cover 16. During this time, the first portions 43 of the two extensions 41 are guided into the hole 15 so as to prevent lateral movement of the valve cover 16''.
    [0099] Alternatively the first portion 43 of each extension 41 can be made of a narrower width than the leg 20 on which the portion 43 depends, so as to be guided into a notch (not shown) that is formed on the floor of the tray 14 as an adjunct to the rectangular hole 15, in order to prevent lateral movement of the valve cover 16'' during the lifting of the valve cover 16''. Alternatively, the first portion 43 of each extension 41 can be sized to rest on top of the floor of the tray 14, while the second portion 44 is guided in a notch (not shown) adjacent to the hole 15, in order to prevent lateral movement of the 16'' valve cover when lifting the 16'' valve cover.
    [00100] The invention thus provides a valve cover for a contact tray of relatively simple construction and one that increases the capacity of the tray.
    [00101] The invention further provides a contact tray on a tray column with a drag device that improves drag resistance.
    权利要求:
    Claims (16)
    [0001]
    1. Contact tray (11) for a mass transfer column comprising a tray floor (14) for receiving a flow of liquid therein, said tray floor (14) having a plurality of holes (15) for the passage. through it by an ascending steam; and a plurality of valve covers (16, 16', 16''), each said valve cover (16, 16', 16'') being mounted over one of the respective holes (15) and having a central portion (19) disposed in spaced relation to said tray floor (14) and along a respective hole (15) and at least one guide vane (22) extending laterally and downwardly from the central portion (19 ) towards said tray floor (14) to deflect at least a part of the rising steam through a respective hole (15) towards said tray floor (14), wherein at least some of said valve covers ( 16, 16', 16'') have a pair of legs (20) extending from opposite ends of said central portion (19) over said tray floor (14) characterized by the fact that a pair of panels ( 39, 39') is provided, each said panel (39, 39') extending between a respective one of said pair of legs (20) and the guide vane (22) for deflecting a a part of the steam rising through a respective hole (15) towards said floor of the tray (14), and in which each panel (39, 39') has a triangular shape and extends above the height of the guide vane (22 ) and above half or substantially the height of the leg (20) to thereby leave a space (40) in relation to the floor of the tray (14).
    [0002]
    2. Contact tray (11) according to claim 1, characterized in that each of said valve cover (16, 16', 16'') has means for engaging said floor of the tray (14) to prevent lifting of said respective valve cover (16, 16', 16'') from said tray floor (14) or means for engaging said tray floor (14) to allow lifting of said valve cover (16) from said floor of the tray (14) a predetermined amount.
    [0003]
    3. Contact tray (11) according to claim 2, characterized in that said means includes a deformable flap (21, 21') that extends from at least one of said legs (20) through a groove in said tray floor (14) to abut an underside of said tray floor (14).
    [0004]
    4. Contact tray (11) according to claim 2, characterized in that said means includes a pair of extensions (41), each said extension (41) extending from a respective leg (20) of the said pair of legs (20), each said extension (41) including a first portion (43) for passing through said hole (15) of said floor, a second portion (44) extending downwardly from said first portion. (43) and towards a second portion (44) of the other of said pair of extensions (41) and a U-shaped portion extending upwardly from said second portion (44) and defining a pair of spaced apart teeth. from said tray floor (14) a predetermined distance to abut an underside of said tray floor (14) in response to lifting of said valve cover (16, 16', 16'') relative to said floor of the tray (14).
    [0005]
    5. Contact tray (11) according to claim 1, characterized in that it further comprises an opening (26, 27) in a selected one of said central portions (19) and said legs (20) for the passage of steam through of the same.
    [0006]
    6. Contact tray (11) according to claim 1, characterized in that each of said valve covers (16, 16', 16'') has a pair of vanes of said guides extending laterally and to down from opposite sides of said central portion (19) towards said tray floor (14) to deflect at least a part of the rising steam through a respective hole (15) towards said tray floor (14) .
    [0007]
    7. Contact tray (11) according to claim 6, characterized in that each of said valve covers (16, 16', 16'') have a plurality of panels (39, 39'), each said panel (39, 39') extending between a respective said pair of legs (20) and one of said respective guide vanes for deflecting a portion of the rising steam through a respective hole (15) towards said tray floor (14).
    [0008]
    8. Contact tray (11) according to claim 1, characterized in that it further comprises a plurality of drag devices (29, 29'), each of said drag device (29, 29') extending from a respective valve cover (16, 16', 16'') below said tray floor (14) and having a deflector (31, 31') in vertical alignment with a respective hole (15) in said tray floor tray (14).
    [0009]
    9. Contact tray (11) according to claim 8, characterized in that said deflector is horizontally disposed and includes a plurality of grooves (36) and at least one finger (37) inclined downwardly into each slot (36).
    [0010]
    10. Contact tray (11) according to claim 1, characterized in that each said hole (15) in said tray floor (14) has a central section (17) and at least one pair of sections end (18) of smaller width than said center section (17) extending from opposite ends of said center section and each said valve cap (16, 16', 16'') has a pair of prongs. at (20) inclined at opposite ends, each said leg (20) of each said valve cap (16, 16', 16'') extending to a respective end section (18) of a respective hole (15) .
    [0011]
    11. Contact tray (11) according to claim 1, characterized in that said tray floor (14) includes at least one groove adjacent to a respective hole (15) and each said valve cover (16, 16', 16'') has a leg (20) extending from said central portion (19) in said groove (25).
    [0012]
    12. Valve cover (16, 16', 16'') for a mass transfer column comprising a central portion (19) for arrangement in spaced relation to an orifice (15) for the passage of an upward flow of steam, on a floor of the tray (14); a pair of legs (20) extending downwardly from opposite ends of said central portion (19); and at least one guide vane (22) extending laterally and downwardly from said central portion (19) to deflect at least a part of the rising steam through a respective hole (15) towards said tray floor. (14), characterized in that a pair of panels (39, 39') is provided, each said panel (39, 39') extending between a respective one of said pairs of legs (20) and said guide vane (22) to deflect part of the steam ascending through a respective hole (15) towards said floor of the tray (14); wherein each panel (39, 39') is triangular in shape and extends above the height of the guide vane (22) and above half or substantially the height of the leg (20) to thereby leave a space (40) in relation to the floor of the tray (14).
    [0013]
    13. Valve cover (16, 16', 16'') according to claim 12, characterized in that it further comprises a pair of dependent extensions (41), each said extension (41) including a first portion (43) to pass through said hole (15) of said floor, a second portion (44) extending downwardly from said first portion (43) and a second portion (44) towards the other of said pair of extensions (41 ) and a U-shaped portion (45) extending upwardly from said second portion (44) and defining a pair of teeth (46) spaced from said tray floor (14) at a predetermined distance to abut to an underside of said tray floor (14) in response to lifting of said valve cover (16) relative to said tray floor (14).
    [0014]
    14. Valve cover (16, 16', 16'') according to claim 12, characterized in that it further comprises a pair of guide vanes extending laterally and downwardly from opposite sides of said central portion (19 ) and a plurality of panels (39, 39'), each said panel (39, 39') extending between a respective one of said pair of legs (20) and a respective one of said guide vanes for deflecting a portion of the vapor ascending through a respective hole (15) to the floor of the tray (14).
    [0015]
    15. Valve cover (16, 16', 16') according to claim 12, characterized in that it further comprises a drag device extending downwards from one of said legs (20).
    [0016]
    16. Combination of a tower (10), a plurality of tray floors and a plurality of valve covers (16, 16', 16''), wherein the tower (10) is disposed on a vertical axis, and the The plurality of horizontal tray floors is disposed in vertically spaced relationship within said tower (10) to receive liquid flows therein, each said tray floor (14) having a plurality of holes (15) for passage therethrough of a rising steam; and a plurality of valve covers (16, 16', 16'') are mounted on each respective floor of the tray (14), each said valve cover (16) having a central portion (19) disposed in spaced-apart relationship. a respective hole (15) in a respective floor of the tray (14) and at least one guide vane (22) extending laterally and downwardly from said central portion (19) in the direction and in spaced relationship to said respective floor of the tray (14), to divert at least a part of the rising steam through a respective hole (15) towards said floor of the respective tray, and optionally further comprising a plurality of drag devices (29), each of the said drag device (29) extending from a respective valve cover (16, 16', 16'') below a respective floor of the tray (14) and having a deflector in vertical alignment with a respective hole (15 ) on said respective tray deck (14), and m that at least part of said valve covers (16, 16', 16'') have a pair of legs (20) extending from opposite ends of said central portion (19) on said tray floor (14), characterized in in that a pair of panels (39, 39') is provided, each said panel (39, 39') extending between a respective one of said pairs of legs (20) and said guide vane (22) for deflect part of the steam ascending through a respective hole (15) towards said floor of the tray (14); wherein each panel (39, 39') is triangular in shape and extends above the height of the guide vane (22) and above half or substantially the height of the leg (20) to thereby leave a space (40) in relation to the floor of the tray (14).
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    同族专利:
    公开号 | 公开日
    MX2012011714A|2012-11-06|
    RU2572961C2|2016-01-20|
    RU2012153249A|2014-06-20|
    KR20130097634A|2013-09-03|
    US8944419B2|2015-02-03|
    EP2944363B1|2020-12-30|
    CN102869421A|2013-01-09|
    JP5860870B2|2016-02-16|
    BR112012028808A2|2016-07-26|
    ES2699196T3|2019-02-07|
    EP2569067A2|2013-03-20|
    TW201212996A|2012-04-01|
    AU2011252198A1|2012-09-27|
    EP2569067B8|2018-11-21|
    PL2569067T3|2019-02-28|
    EP2944363A1|2015-11-18|
    CA2799119C|2019-01-15|
    US20110278745A1|2011-11-17|
    CN102869421B|2015-09-23|
    AU2011252198B2|2015-03-12|
    CN105363233A|2016-03-02|
    TWI542401B|2016-07-21|
    CA2799119A1|2011-11-17|
    WO2011141301A3|2012-05-24|
    WO2011141301A2|2011-11-17|
    CN105363233B|2018-09-14|
    JP2013526401A|2013-06-24|
    KR101799416B1|2017-11-20|
    EP2569067B1|2018-08-29|
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    法律状态:
    2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-02-26| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|
    2020-01-07| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application [chapter 6.1 patent gazette]|
    2020-06-02| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-10-27| B25G| Requested change of headquarter approved|Owner name: SULZER CHEMTECH AG (CH) |
    2020-12-08| B25A| Requested transfer of rights approved|Owner name: SULZER MANAGEMENT AG (CH) |
    2021-05-25| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 29/04/2011, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/800,195|US8720870B2|2010-05-11|2010-05-11|Contact tray for a mass transfer column|
    US12/800,195|2010-05-11|
    US12/932,476|2011-02-25|
    US12/932,476|US8944419B2|2010-05-11|2011-02-25|Contact tray for a mass transfer column|
    PCT/EP2011/056843|WO2011141301A2|2010-05-11|2011-04-29|Contact tray for a mass transfer column|
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