• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A feed system for a finely divided cellulosic material, comprising: a chip silo having an upper chip inlet, an inner chamber oriented substantially vertically and a lower outlet port; at least one lute inlet to the chip silo for injecting lye into the chip silo, the chip silo holding sufficient lye and chips inside the inner chamber to provide a hydraulic pressure on the chip at the lower outlet port; a substantially horizontally oriented chip conveyor or chip tube coupled to the lower outlet port for receiving the chips and liquor from the silo under hydraulic pressure, the conveyor or tube comprising lye injectors injecting lye into the chip and the conveyor or tube, and a high pressure transfer device connected to an outlet of the conveyor or pipe for receiving the chips and the liquor, the hydraulic pressure of the chips and the liquor at the outlet of the chip silo being sufficient to feed the chips and the liquor to the high pressure transfer device.
    公开号:SE537269E
    申请号:SE1151166
    申请日:2010-06-10
    公开日:2017-11-06
    发明作者:Bradford Hunt Tyson；Stromberg Bertil
    申请人:Andritz Inc；
    IPC主号:
    专利说明:

    COMPACT FEEDING SYSTEM AND PROCEDURE FOR FEEDING DISTRIBUTED CELLULOSIS-RELATED MATERIAL RELATED APPLICATION 2009, both of whose contents are incorporated by reference.
    BACKGROUND OF THE INVENTION The present invention relates to a feed system for delivering finely divided cellulosic fibrous material, such as wood chips, to a continuous boiler treatment vessel, and more particularly to feeding these materials to a high pressure transfer device which converts a low pressure slurry of material into a high pressure slurry. which is transported to the boiler treatment vessel.
    In the production of pulp from finely divided cellulosic fibrous material (herein generically referred to as "wood chips" or simply "chips") in a continuous boiler, the wood chips are treated to remove entrapped air and to impregnate the chips with boiling liquor while raising the pressure and temperature of the material. to, for example, 150 degrees Celsius (150 ° C) and 10 bar above atmospheric pressure. Typically, the chips are based to expel air and increase the temperature of the chips, after which it is impregnated with heated cooking liquor, pressurized and transported as a slurry to the digester.
    A conventional chip feeder unit typically includes a chip silo, a low pressure feeder, a basing vessel, a vertical chip tube and a high pressure feeder for expelling air from, heating and pressurizing the chips. Examples of conventional high-pressure feeders are shown in U.S. Pat.
    The chips in the chip silo are traditionally relatively dry and are slurried with lye downstream of the chip silo. However, lye has been added to the chip silo to slurry the chips and facilitate transport of the chips from the chip silo to the basing vessel and the vertical chip tube. Steam has also been added to the chips in the chip silo or in a base vessel. The chips can also be based in a base vessel downstream of the chip silo. At the outlet of the basing vessel or in the chip conveyor, lye has been added to the chips to suspend the chips to facilitate movement of the chips.
    The slurry has been moved with mechanical conveyors, e.g. horizontal pipes with screws and screw feeders, for the vertical chip pipe. The screws and screw feeders in the mechanical conveyors are driven by motors that require energy. These moving mechanical components, e.g. screws and screw feeders, are expensive in terms of acquisition costs and operating costs. There has long been a need to reduce procurement costs, maintenance costs and energy costs in wood chip feeding systems.
    The hydraulic pressure of the slurry in the vertical chip tube helps to feed the chips to the high pressure transfer device. When the chip slurry enters the upper part of the vertical chip tube, the slurry fills the tube and applies a hydraulic pressure to the chip in the lower part of the tube. The chip tube has a height which ensures that the weight of the chip slurry contained in the tube provides a hydraulic pressure at the lower outlet end of the tube which is sufficient to feed the chip to the high pressure transfer device, such as a high pressure feeder.
    Without sufficient hydraulic pressure, the negative pressure provided by the high pressure feeder on the incoming chip slurry can cause gas bubbles in the slurry entering the feeder. Once gas has been trapped in the slurry, the slurry becomes partially compressible and more difficult to pressurize. Gas in the slurry can reduce the efficiency of the high pressure feeder. In some circumstances, gas, caused by a lack of hydraulic pressure, can block the flow of chip slurry into the high pressure feeder.
    Vertical chip pipes have traditionally provided the required hydraulic pressure on the chip slurry. A vertical chip pipe can be 15 feet to 30 feet (5 feet to 10 feet) high. The height of the chip tube significantly increases the total height of the chip feed system and requires that the chip silo be arranged at a relatively high height above the chip tube. The support structures needed for chip silos and other high-lying parts of the chip feed system can be extensive. Wood chip silos can, for example, be arranged at a height of 115 feet (35 meters). There is a need to reduce the height of the chip feed system to minimize the design required for the system and to reduce the design and maintenance costs of the chip feed system.
    BRIEF DESCRIPTION OF THE INVENTION A chip feed system that fills a lower portion of a chip silo with lye to produce a chip slurry in the silo has been developed. The slurry in the silo creates hydraulic pressure at the silo's lower outlet. The hydraulic pressure is sufficient to feed the chip slurry to a high pressure transfer device. Filling the chip silo can make the chip tube redundant.
    A chip screw conveyor or a horizontally arranged chip tube receives the chip slurry under the hydraulic pressure from the chip silo and feeds the chip slurry to a high pressure transfer device, such as a high pressure feeder (HPF). Since the hydraulic pressure is created in the chip silo, a chip tube is superfluous. The chip silo may be located at a lower height than would be possible if a chip pipe were arranged between the silo and the high pressure transfer device.
    Filling the chip silo with lye produces a slurry of finely divided cellulosic fibrous material in the silo. The hydraulic pressure resulting from the liquor in the silo is sufficient to provide the hydraulic pressure needed to feed a high pressure transfer device connected to a continuous boiler. In some cases, the hydraulic pressure produced in the chip silo can eliminate the need for mechanical chip transport devices and thereby eliminate mechanical impact on the atomized cellulosic material as well as eliminate damage caused by mechanical impact on the chip material. Avoidance of mechanical chip conveyors can reduce capital and operating costs for chip transport as well as improved the physical mass properties, such as better burst strength, tensile strength and tear strength.
    A vertical chip tube is not needed, as the filled chip silo applies sufficient hydraulic pressure to feed the chips to a high pressure transfer device. By eliminating a vertical chip tube, the height of the chip feed delivery can be made shorter than for conventional chip feed systems with vertical chip tubes. A shorter chip feeding system requires fewer and less construction supports than would otherwise be necessary to raise the chip silo to a high height and to support the chip tube. The chip feed system can, for example, be about 6 feet (20 meters) high. A conventional chip feeding system with a horizontal chip tube for an equally large pan can, on the other hand, be 115 feet (35 meters) high.
    Elimination of the chip tube by filling the chip silo can reduce the height of the chip feed system by, for example, 20 feet (7 m) to 55 feet (17 m). This reduction in the height of the chip feeding system achieves significant savings in construction and maintenance costs by reducing the amount of structural steel and other materials needed to achieve the high placement of chip silos in conventional systems and making chip silos more easily accessible by lowering its placement.
    The chip feed system with a filled chip silo further provides a high chip delivery capacity for feeding at a relatively high chip slurry flow rate to the high pressure feeder or other transport device. By eliminating the chip tube, restrictions on the chip flow rate through the chip tube are eliminated. The flow rate of the chip slurry can be determined by the capacity of the chip silo, which is typically higher than the flow capacity of conventional chip tubes.
    In addition, a substantially horizontal chip tube can move the chip by hydraulically moving the chip slurry through and out of the tube. Hydraulic forces are applied by injecting lye or steam into the pipe. Nozzles for lye or steam (or both) are arranged along the length of the pipe for injecting jets of lye or steam angled in the direction of the chip flow in the pipe. Furthermore, jets of lye or steam at the outlet of the chip tube can optionally be applied to force the chip slurry from the tube and into a conduit which feeds the high pressure feeder.
    The horizontal chip tube can be arranged without movable components such as screws and screw feeders. By reducing or eliminating the need for a screw or screw feeder, the horizontal chip tube has fewer mechanically movable components compared to horizontal chip tubes with rotating screws and screw feeders.
    A feed system for a finely divided cellulosic material is shown and described, comprising: a chip silo comprising an upper chip inlet, an inner chip chamber oriented substantially vertically and a lower outlet port; at least one lute inlet to the chip silo for injecting lye into the chip chamber, the chip silo holding sufficient lye and chips inside the inner chamber to provide a hydraulic pressure on the chip at the lower outlet port; a substantially horizontally oriented / oriented chip conveyor or chip tube coupled to the lower outlet port for receiving the chips and liquor from the silo under hydraulic pressure, the conveyor or tube comprising lye injectors injecting lye into the chips in the conveyor or tube, and a high-pressure transfer device connected to an outlet of the conveyor or pipe for receiving the chips and the liquor, the hydraulic pressure of the chips and the liquor at the outlet of the chip silo being sufficient to feed the chips and the liquor to the high-pressure transfer device.
    A method of feeding cellulosic fibrous material to a high pressure transfer device is shown, which comprises feeding the cellulosic fibrous material to an upper inlet of a chip silo; adding lye to the chisel to at least partially fill the chisel with a slurry of the lye and the fibrous material; providing a hydraulic pressure in the slurry at a lower outlet of the chip silo due to the liquor in the chip silo; discharging the slurry under hydraulic pressure to a substantially horizontal conveyor or a substantially horizontal pipe; injecting lye into the conveyor or pipe to move the slurry to an outlet of the conveyor or pipe, and transporting the slurry under the hydraulic pressure from the outlet of the conveyor or pipe to an inlet of the high pressure transfer device.
    A chip pipe comprising: a substantially horizontal pipe with an inlet arranged to be attached to an outlet opening of a chip silo and an outlet arranged to be in fluid communication with a chip feeder; a chip slurry passage inside the tube, which extends from the inlet to the outlet; at least one fluid injection nozzle attached to the pipe and arranged to inject a fluid into the chip tube, the fluid injection nozzle being arranged at an angle for injecting the fluid towards a first end of the pipe near the outlet.
    BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram showing a chip silo with a filled lower silo part and a lower outlet, the silo being connected to a horizontal filled twin screw feeder which feeds chips directly to a high pressure transfer device.
    Figure 2 is a schematic diagram showing a chip silo with a filled lower silo part and a lower outlet, the silo being connected to a filled horizontal chip tube feeder which discharges chips directly to a high-pressure transfer device.
    Figure 3 is a schematic diagram showing a chip silo with a filled lower silo part and a lower outlet, the silo being connected to a filled horizontal chip tube feeder which discharges the chips directly to a high-pressure transfer device.
    DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows a chip feed system 10 with a chip silo 11 with a closed upper part 12 with a conventional upper chip inlet 14. The chip silo 11 is a vertical vessel with a lower outlet 15. The chip inlet 14 may include a feed screw 16 and an air lock 18 The feed screw receives chips via a line or conveyor from a chip supply 20. A ventilation opening 22 at the upper part 12 of the chip silo allows the outflow of steam and other gaseous materials from the chip silo to a recovery system 24 for steam or gaseous materials.
    The chip silo 11 may include an upper chamber 26 having a circular or elliptical cross-section and a diameter of, for example, about 10 to 15 feet (3 to 5 meters). A chip level sensor 25, e.g. a gamma sensor, may be present in the upper chamber for monitoring the level and thus the amount of chips in the silo. The height of the upper chamber can be half to two thirds of the total height of the chip silo.
    Chips from the upper chip inlet 14 enter and settle in the upper chamber 26. The chips in the upper chamber form a chip pillar which moves downwards through the chip silo towards a lower chamber 28 of the chip silo. A control device 38, e.g. a computer, monitors the chip level sensor 25 and can adjust the chip feeder screw 16 to maintain a desired level of chips in the silo.
    The chips in the upper chamber 26 may remain relatively dry or be based by steam nozzles 30 provided on the outer wall of the upper section. A steam source 32, e.g. a source of low pressure steam, provides steam to the steam nozzles 30, which may be arranged at one or more heights in the upper chamber of the chip silo. The steam provides heat energy for heating the chips in the upper chamber and for starting basing of the chips.
    The lower chamber 28 of the chip silo has at one upper end the same cross section as the lower end of the upper chamber 26. Wood chips flow directly from the upper chamber to the lower chamber. Flissilon's lower chamber 28 is completely or at least partially filled with lye. A part of the upper chamber 26 can similarly be filled with lye. Lutin injection nozzles 32 are arranged in the lower chamber of the chip silo at, for example, different heights on the outer wall of the chip silicon. At each height, a set of lye nozzles 32 may be distributed around the circumference of the outer wall of the lower chamber of the chip silo. For example, there may be two heights with sets of lye nozzles 32. The lye nozzles 32 may be oriented at an angle of between 15 degrees and 85 degrees down from the horizontal plane for injecting lye down into the chip silo. The downward injection of lye helps to move the chips downwards through the chips of the chip silo.
    A source 34 of lye, e.g. white, green or black liquor, is connected to each of the liquor nozzles 32 through conduits 35 and valves 36. The valves can be adjusted manually and then remain in a set position to regulate the liquor flow to the nozzle connected to the respective valve. The valves can alternatively be controlled by a computer control unit 38 which adjusts the valves to achieve a desired increase in the filling in the chip silo. One or more sensors 39, e.g. float sensor, pressure sensor or optical sensor, can be positioned (e) in the lower and upper chambers of the chip silo to monitor the lye level in the silo.
    Flissilons 11 lower section 28 has a geometry, e.g. a cross-sectional geometry, with an open upper part 40 of substantially circular cross-section and an open lower outlet 15 of substantially rectangular cross-section. The lower section 28 has opposite non-vertical gradual tapered flat sidewalls 42. The flat sidewalls 42 form an angle which may be about 20 degrees to 30 degrees. These angles can be determined depending on the particular material handled in the chip silo 11, such as the particular type of wood chips commonly fed to the silo. The lower chamber 28 provides a smooth geometric transition between the circular configuration of the upper chamber 26 and the substantially rectangular lower outlet 15.
    Between the opposite flat side walls 42, there are opposite curved side walls 44 which are connected to the flat side walls. Each of the planar side walls 42 may be substantially triangular in a plan view. These flat side walls may be arranged vertically in a diamond shape as shown in Figure 1.
    The side walls 42, 44 of the lower section may be welded together and with the upper section to provide a continuous fluid tight chamber 28 for the chip and liquor in the chip silo. The chamber 28 is substantially empty to promote uniform movement of the chips and the liquor downward through the chip silo. The chambers 26, 28 of the chip silo, and in particular the lower chamber 28, are designed (e) to promote uniform downward movement of the chips through the silo over the entire cross-sectional area of the silo. Chip silos that promote uniform downward flow of chips are disclosed in U.S. Patent No. 5,617,975 (see col. 6, line 65 to col. 8, line 52), which is hereby incorporated by reference in its entirety. Lye, chips and steam preferably do not leak from the chip silo, except through the lower chip slurry outlet 15 and the upper vent 22 for vapor and gaseous material.
    The chip silo is partially filled with lye to create a slurry of chips and lye inside the chip silo. The slurry produces an elevated hydraulic pressure at the lower outlet 15 of the chip silo. The hydraulic pressure is sufficient to force the chip slurry into a high pressure transfer device 46, e.g. one or more pumps or a high pressure feeder, without the formation of gas at the inlet of the device 46. The hydraulic pressure required depends on what is required of the high pressure transfer device and the components, e.g. screw conveyor in horizontal chip tube 48, between the silo outlet 15 and the high pressure transfer device 46. The hydraulic pressure produced by filling, or at least partially filling, of chip silo makes a conventional vertical chip tube an unnecessary component at the inlet of the high pressure transfer device 46.
    The level, e.g. the liquid level, for the slurry in the chip silo can be set so that the desired hydraulic pressure is achieved. The level of the slurry in the chip silo may, for example, be at a height of 15 feet (3 meters), or in a range from 10 feet to 20 feet (3 meters to 7 meters) from the lower outlet 15 of the chip silicon to the upper surface level of the liquor silo.
    The rate of injection of lye into the chip silo 11, the rate of chips entering the silo and the rate at which the chip slurry is discharged from the silo determine the lye level in the chip silo. The slope level in the chip silo should generally be kept at a predetermined level. Tilt level sensors 39 can sense the tilt level in the chip silo.
    Based on signals from these sensors, the controller 38 can adjust the valves 36 to control the liquor flow through the nozzles 32 and adjust the speed of chips entering and discharged from the chip silo to achieve a desired liquor level in the chip silo.
    The amount or rate of lye injected into the chip silo may be greater than the chip's ability to absorb lye during the time the chip is in the silo. An amount or rate of lye may be sufficient to generate free liquid in the chip silo. The free liquid helps to provide a slurry which promotes a discharge flow of chips from the chip silo and moves the slurry through the conveyor device, such as a conveyor 48 or a chip tube 62, 82 (Figs. 2 and 3), without the need for a mechanically actuating device.
    Lye 34 for chip silo can be extracted from the treatment vessel, such as from a top separator device. The amount of lye required for boiling or other treatment in the treatment vessel is generally less than the amount of lye desired for transporting the lye as a slurry through the conveyor, the chip tube, pumps, high pressure transfer devices and associated conduits (pipes). The excess lye that is not needed for boiling or treatment can be extracted from the slurry as it enters the treatment vessel, such as by using a top separator. The excess liquor may be used black liquor 34 for injection into the chip silo and thereby provide a sufficient hydraulic pressure. White liquor 34 can also be injected into a chip silo.
    The amount of white liquor introduced into the chip silo may, for example, be ten (10) percent to fifty (50) percent of the total amount of white liquor introduced into the pulp production system, which generally includes the chip silo, the chip feeding system and the treatment vessel (s). All or most of the remaining amount of white liquor is preferably introduced into the treatment vessel (s). The white liquor introduced into the chip silo and into the treatment vessel is used for processing, e.g. boil, the chips in the treatment vessel.
    For wood chips from heavy hardwood, the amount of white liquor introduced into chip silo can be between 10 and 25 percent of the total amount of white liquor introduced into the pulp production system. For softwood chips, the amount of white liquor introduced into chip silo can be between 25 and 50 percent of the total amount of white liquor introduced into the pulp production system.
    The lye added to the chip silo can be an initial filling of highly concentrated white liquor that drowns the chips in the silo. In one example, wood chips are heavy hardwood that absorbs an amount of lye corresponding to 1.2 times the dry weight of the wood. Light softwood chips have a tendency to absorb twice as much lye as the dry weight of the wood. The amount of lye added at the lower part of the chip silo, e.g. white liquor, may constitute at least 0.2 to 1.0 times the dry weight of the wood in wood chips. For a chip silo with light softwood chips, the amount of white liquor added to the chip silo can be at least between 0.6 and 1.0 times the dry weight of the chips in the silo.
    However, the amount of liquor in the chip silo is preferably sufficient to provide the hydraulic pressure needed to feed the chips into a high pressure feeder.
    The white liquor can be added at a temperature that is lower than the temperature of the chips in the chip silo. The lower temperature of the white liquor reduces the risk of premature boiling of the wood chips before the chips are in the treatment vessel. The chips in the chip silo can be heated to 100 degrees Celsius by adding steam 22 to the chip silo. The white liquor can be added at temperatures lower than 90 degrees Celsius, such as at ambient temperature.
    The chip slurry is discharged under hydraulic pressure from the chip outlet's lower outlet 15. The lower outlet is connected to a substantially horizontal twin screw conveyor 48, which includes a helical screw in a cylindrical housing. The conveyor 48 may be substantially horizontal, such as arranged at an inclination of not more than ten degrees.
    The chip slurry enters the screw conveyor 48 and is moved by means of helical screws to the outlet end 50 of the conveyor. discharging chips to line 54 and helping to prevent chips from clogging and blocking the screw conveyor outlet 50. The injection of lye can also be used to adjust the ratio of lye to chips in the slurry to a ratio suitable for the high pressure transfer device.
    Nozzles 56 may inject steam or liquor (or both) at a lower inlet 52 to promote the movement of chips out of the conveyor. The nozzles 56 may be oriented to apply jets of liquor or steam in a partially upward direction to the chips to assist in moving the chips out of the screw conveyor. The vertical nozzle 56 can be installed by modifying a conventional horizontal chip tube having an upper chip outlet 78.
    The chip slurry flows through line 54 to the high pressure transfer device (s) 46, such as a serial or parallel set of one or more pumps or a high pressure feeder. The high pressure transfer device may be arranged at a height which is substantially the same as, e.g. be arranged within 15 to 25 vertical feet (5 to 8 meters) from, the height at the lower outlet port of the chip silo 15. The chip slurry is pressurized in the high pressure transfer device to a pressure level suitable for a treatment vessel 58, such as a continuous boiler vessel line 54.
    Figure 2 shows a chip feed system 60 with a filled chip silo 11 (as shown in Figures 1 and 2) and a horizontal chip tube 62 at the lower outlet 15 of the silo 15. The chip tube 62 replaces the screw conveyor 48 shown in Figure 1. Chip silo 11 in the feed system 60 the same way and has the same components and geometry as the chip silo 10 described in connection with Figure 1. In addition, a rotating scraper may or may not be provided in the lower part of the chip silo to help discharge the chip slurry to the chip tube. The rotary scraper is a component of the chip silo and not of the chip tube.
    The chip tube 62 is dependent on hydraulic action for moving the chip slurry through the tube from the chip silo and to the high pressure transfer device 46. The hydraulic action includes injecting liquor 34 or steam through nozzles 70 arranged along the chip tube housing. By hydraulically moving the chip slurry from the silo to the high pressure feeder, such mechanical screw and screw feeder devices in the chip tube found in conventional chip conveyors (such as those shown in Figure 1) are avoided. Cost efficiency, e.g. acquisition costs, energy costs and maintenance costs, can be achieved by eliminating the movable screw and screw feeder components of a conventional chip conveyor.
    The chips are discharged from the silo to the upper inlet 64 of the horizontal chip tube 62. The coupling 66 between the chip outlet's lower outlet 15 and the upper inlet 64 is designed to promote a smooth and uniform flow of chips into the chip tube. The coupling 66 may have a geometric cross-sectional shape, such as a circular shape, an elliptical shape, a race-like shape, or an eight-figure shape.
    One or more lye injectors 68 at the axial end of the chip tube inject lye 34 or steam into the chip tube 62 to provide a flow through the tube, which draws chips from the silo and into the tube. Several lye or steam injectors 68 provided at the axial end and adjacent coupling 66 to the chip tube can be used to inject lye or steam into the chip tube to move the chips from the silo and into the chip tube.
    The flow rate of the chip from the chip silo to the chip tube 62 can be controlled by the amount of lye or steam injected through the injector (s) 68. Lye or steam can similarly be injected along the length of the chip tube from nozzles 70 arranged in the side wall of the chip tube. These nozzles 70 may be oriented to angle the flow of injected liquor in substantially the same direction as the desired flow of chips through the chip tube. These nozzles 70 move the chips through the chip tube and help control the flow rate of the chips through the chip tube.
    The liquor added from the nozzles 70 can also be used to dilute the chips in the slurry to a chip-slurry ratio which is suitable for the high pressure transfer device 46 downstream of the chip tube.
    A nozzle 72 vertically oriented at the outlet end of the chip tube injects lye or steam to drive the chip vertically upward from the chip tube and into the conduit 54.
    Each of the injectors 68 and the nozzles 70, 72 (which may be of structurally the same nozzle model) may have a corresponding valve 74 for controlling the flow of liquor or steam to the injector or nozzle. These valves 74 can be set manually or can be controlled by the control device 38 based on signals from the flow sensor 76 in the line 54 or at the high pressure transfer device 46.
    The chip tube 62 may be a substantially cylindrical tube with a shaft and a center passage for chip slurry that is substantially free of obstructions. Mounted on the chip tube housing are the nozzles 70, 72, which are positioned and angled to move the chip slurry through the center passage from the chip inlet to the chip outlet. The nozzles can be mounted at an oblique angle, e.g. 10 degrees to 45 degrees, on the tube casing. The angle of the nozzle directs the fluid flow from the nozzles into the center passage in a chip flow direction through the passage. The nozzles inject fluid along an axis of the tube and into a second end of the tube near the inlet. The nozzles may comprise an axially mounted nozzle near an inlet end of the pipe, a set of nozzles at a plurality of nozzle attachments arranged along the chip tube housing between the inlet and the outlet and nozzles adjacent the chip pipe outlet.
    Figure 3 shows another chip feeding system 80 with a filled chip silo 11 (as shown in Figures 1 and 2) and a horizontal chip tube 82 at the lower outlet 15 of the silo. The chip tube 82 is similar to the chip tube 62 shown in Figure 2, except that the chip tube 82 has an axial (either in or out of the plane) chip slurry outlet port 84. The chip slurry is discharged from the chip tube to the conduit 54 in substantially the same direction as the direction of the chip slurry flow through the chip tube. Because the chip slurry flow does not deviate when it leaves the chip tube. no vertically oriented nozzle (see Fig. 2 at 72) is required at the outlet of the chip tube 84.
    Line 54 transports the chip slurry to the high pressure transfer device 46. The valves 86 in the line can control the flow and pressure of the chip slurry in the line. In addition, the nozzles 88 with associated valves 74 can inject lye or steam to help move the slurry through the conduit 54 and to dilute the slurry. The valve 86 and valve 74 of the nozzle (s) 88 can be set manually or can be controlled by the control unit 38 to provide a desired chip slurry flow or pressure in the line 54. Furthermore, the line 54 can be omitted and the high pressure transfer device, e.g. a pump, may be directly connected to the outlet 84 of the chip tube 82. Although the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to this described embodiment, but on the contrary is intended to comprise various modifications and equivalent devices which are included within the spirit and scope of the appended claims.
    权利要求:
    Claims (15)
    [1]
    A feed system (10, 60, 80) for a finely divided cellulosic material, comprising: a chip silo (11) comprising an upper chip inlet (14), an inner chamber oriented substantially vertically and a lower outlet port (15); at least one lye inlet for the chip silo which is arranged to inject lye into the chip silo, the chip silo holding sufficient lye and chips inside the inner chamber to provide a hydraulic pressure on the chip at the lower outlet port; a substantially horizontally oriented chip transport device (48, 62, 82) coupled to the lower outlet port for receiving the chips and liquor from the silo under hydraulic pressure, and a high pressure transfer device (46) connected to an outlet of the chip transport device for receiving the chips and liquor, characterized that the hydraulic pressure produced by the chips and the liquor in the silo at the outlet of the chip silo is sufficient to feed the chips and the liquor to the high-pressure transfer device, the chip transport device being a chip tube (62, 82) with liquor nozzles (68, 70, 72, 88) arranged for conduction of liquor into the chip tube for hydraulic movement of the chip through the chip tube to the chip transport device outlet.
    [2]
    A feed system according to claim 1, wherein the slope level in the chip silo (11) is at least 15 feet above the chip outlet's lower outlet port (15) and the chip silo is filled with liquor and chips between the liquor level and the lower outlet port.
    [3]
    Feed system according to claim 1 or 2, wherein the chip transport device (48, 62, 82) comprises lye injectors (68, 70, 72, 88) which inject lye into the chips and the lye in the chip transport device.
    [4]
    A feeding system according to any one of claims 1 to 3, wherein the chip conveyor device (48) comprises a mechanical screw conveyor or screw feed conveyor.
    [5]
    A feeding system according to any one of claims 1 to 4, wherein said at least one lutein inlet to the fleece silo (11) is a set of lye nozzles (32) arranged around a circumference of the fleece silo at a plurality of heights of the fleece silo.
    [6]
    A feeding system according to any one of claims 1 to 5, wherein said at least one lye inlet to the chute (11) includes a chute nozzle (32) oriented at an angle of between 15 degrees and 85 degrees down from the horizontal plane for injecting lye down into the chute. .
    [7]
    A feeding system according to any one of claims 1 to 6, wherein an upper part (26) of chipboard (11) has a circular or elliptical cross-section and a lower part (28) of chipboard comprises flat tapered opposite side walls.
    [8]
    A supply system according to any one of claims 1 to 7, wherein the lower outlet port (15) is located at a height within 15 feet of a height of the high pressure transfer device (46).
    [9]
    A method of feeding finely divided cellulosic fibrous material to a high pressure transfer device (46), comprising: feeding the atomized cellulosic fibrous material to an upper inlet (14) of a chip silo (11); adding lye to the chisel to at least partially fill the chisel with a slurry of the lye and the fibrous material; providing a hydraulic pressure in the slurry at a lower outlet (15) of the chip silo due to the liquor in the chip silo; discharging the slurry under the hydraulic pressure to a substantially horizontal conveyor (48) or a substantially horizontal pipe (62, 82) and transporting the slurry under the hydraulic pressure from the outlet of the conveyor or pipe to an inlet of the high pressure transfer device, characterized in that the liquor The hydraulic pressure produced in the silo at the chip silo outlet is sufficient to feed the chips and liquor to the high pressure transfer device, which method further comprises injecting liquor into the conveyor (48) or pipe (62, 82) pre-moving the slurry to an outlet of the conveyor or pipe.
    [10]
    The method of claim 9, further comprising maintaining a slope level in the chip silo (11) at least 15 feet above a lower outlet port (15) of the chip silo.
    [11]
    A method according to claim 10, which includes filling with lye and fl ice between the lye level and the lower outlet port (15).
    [12]
    A method according to any one of claims 9 to 11, wherein the liquor is injected into the chip silo (11) through a set of liquor nozzles (32) arranged around a circumference of the chip silicone and at a plurality of elevations on the chip silicone.
    [13]
    The method of claim 12, wherein said at least one lye inlet to the chip silo includes a lye nozzle (32) oriented at an angle of between 15 degrees and 85 degrees down from the horizontal plane for injecting lye down into the chip silo.
    [14]
    A method according to any one of claims 9 to 13, wherein an upper part (26) of chipboard (11) has a circular or elliptical cross-section and a lower part (28) of chipboard comprises flat tapered opposite side walls and wherein the lower part of chipboard promotes downward movement of the slurry.
    [15]
    The method of claim 9, wherein a lower outlet port (15) of the chip silo is located at a height within 15 feet of a height of the high pressure transfer device (46).
    类似技术:
    公开号 | 公开日 | 专利标题
    SE518138C2|2002-09-03|Feeding chips to a continuous boiler
    SE537269E|2017-11-06|Compact feed system and method for feeding finely divided cellulosic material
    WO2009094531A2|2009-07-30|Reactor pump for catalyzed hydrolytic splitting of cellulose
    WO2008057993A2|2008-05-15|Reactor pump for catalyzed hydrolytic splitting of cellulose
    US20090020244A1|2009-01-22|Impregnation vessel with convergence side relief and method for heat injection at convergence
    US7988822B2|2011-08-02|Treatment vessel for straw or other light bulky material
    CN211069835U|2020-07-24|Novel cosmetics emulsification device
    US20140338252A1|2014-11-20|Method of using reactor vessel having single convergence sidewall plates
    CN107149921A|2017-09-12|It is a kind of to adjust the reactor of temperature
    US5851350A|1998-12-22|Method and apparatus for pumping cellulose pulp
    WO2019169530A1|2019-09-12|Conveying device and conveying method therefor
    SE0950839A1|2011-05-07|System and method for pumping chips into a continuous boiler
    CN210131457U|2020-03-10|Stable pulp filtering tank
    JP2021169839A|2021-10-28|Liquid feeder
    CN101569803B|2011-04-13|Self-diluting device for thickener
    JP2020521068A|2020-07-16|System and chip chute for feeding ground cellulosic material
    JP6512656B2|2019-05-15|Liquid transfer method and liquid transfer apparatus
    CN106894273B|2019-03-05|A kind of boiling vessel
    CN106984207A|2017-07-28|A kind of Vacuum Mixture tank for food ingredient
    JP5110259B2|2012-12-26|Viscous material defoaming / quantitative supply device and viscous material defoaming / quantitative supply device
    CN113202496A|2021-08-03|Slag discharging device for tunnel shield construction
    JPH09221689A|1997-08-26|Treatment apparatus for pyrite
    RU2002134813A|2004-08-10|METHOD FOR DISPERSING PLANT SEEDS AND DEVICE FOR ITS IMPLEMENTATION
    同族专利:
    公开号 | 公开日
    US20100314055A1|2010-12-16|
    RU2524003C2|2014-07-27|
    JP2012530193A|2012-11-29|
    FI20116269A|2011-12-15|
    CN102803604A|2012-11-28|
    SE1151166A1|2012-03-09|
    BR112012000194A2|2016-11-29|
    CN102803604B|2016-03-09|
    US8956505B2|2015-02-17|
    WO2010144693A3|2011-02-24|
    BR112012000194B1|2019-12-03|
    CA2765165A1|2010-12-16|
    JP5789601B2|2015-10-07|
    SE537269C2|2015-03-17|
    RU2012100259A|2013-07-20|
    CL2011003100A1|2012-07-20|
    FI127763B|2019-02-15|
    WO2010144693A2|2010-12-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4071399A|1976-09-01|1978-01-31|Kamyr, Inc.|Apparatus and method for the displacement impregnation of cellulosic chips material|
    US4632729A|1984-05-01|1986-12-30|Laakso Oliver A|Chip presteaming and air washing|
    US5500083A|1994-02-01|1996-03-19|Kamyr, Inc.|Method of feeding cellulosic material to a digester using a chip bin with one dimensional convergence and side relief|
    CA2181892C|1994-02-01|2001-07-24|Jerry R. Johanson|Chip bin assembly including a hollow transition with one dimensional convergence and side relief|
    US5476572A|1994-06-16|1995-12-19|Kamyr, Inc.|Chip feeding for a continuous digester|
    US5635025A|1994-12-05|1997-06-03|Ahlstrom Machinery Inc.|Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chute|
    US5622598A|1995-04-25|1997-04-22|Ahlstrom Machinery Inc.|Chip pumping to a digester|
    US6325888B1|1995-08-31|2001-12-04|Andritz-Ahlstrom Inc.|Method for pulping sawdust|
    US5736006A|1996-10-10|1998-04-07|Ahlstrom Machinery Inc.|Method and apparatus for pulping with controlled heating to improve delignification and pulp strength|
    US5795438A|1996-11-04|1998-08-18|Ahlstrom Machinery Inc.|Method and apparatus for feeding multiple digesters|
    US6159336A|1997-08-07|2000-12-12|Kvaerner Pulping Ab|Method and device for the continuous cooking of pulp|
    US6024227A|1997-08-04|2000-02-15|Ahlstrom Machinery Inc.|Tramp material removal from pulp feed systems|
    SE514296C2|1999-12-29|2001-02-05|Kvaerner Pulping Tech|Method for controlling the boiling temperature in a continuous steam-phase cooker|
    US6436233B1|2000-05-18|2002-08-20|Andritz Inc.|Feeding cellulose material to a treatment vessel|
    SE518789C2|2001-05-04|2002-11-19|Kvaerner Pulping Tech|Chip feed system for chip pockets|
    US6497791B1|2001-08-30|2002-12-24|Jack T. Baker|Apparatus for pre-treatment of wood chips|
    SE0200185L|2002-01-24|2002-12-10|Kvaerner Pulping Tech|Process for increasing the heating economy of the boiler system during continuous boiling|
    SE525065C2|2003-04-17|2004-11-23|Kvaerner Pulping Tech|Pre-treatment of chips with acidic liquid during steaming|
    US7556713B2|2004-06-22|2009-07-07|Andritz, Inc.|Method and system for feeding cellulose chips to a high pressure continuous cooking system|SE526292C2|2004-04-07|2005-08-16|Kvaerner Pulping Tech|Method and apparatus for diluting dewatered cellulose pulp|
    WO2016112203A1|2015-01-07|2016-07-14|Andritz Inc.|System and method for monitoring and control of multiple processing zones within pressurized vessels|
    SE1950436A1|2019-04-08|2020-10-06|Valmet Oy|Reactor assembly and method for treatment of biomass material|
    法律状态:
    2018-02-20| RPOP| Patent has been republished in amended form after opposition|
    优先权:
    申请号 | 申请日 | 专利标题
    US18612309P| true| 2009-06-11|2009-06-11|
    US12/793,965|US8956505B2|2009-06-11|2010-06-04|Compact feed system and method for comminuted cellulosic material|
    PCT/US2010/038156|WO2010144693A2|2009-06-11|2010-06-10|Compact feed system and method for comminuted cellulosic material|
    [返回顶部]