• 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 fuel delivery system (10) includes a fuel tank (12) for storing a supply of fuel (16) and conduits (18) for conducting the fuel (16) from the fuel tank (12) to an engine (20). A separator module (22) in fluid communication with the conduits (18) separates by cross-flow separation a substantially water and particle free fuel permeate flow from a fuel retentate flow. The conduit (18) includes a first passageway (24) conducting the fuel permeate flow to the engine (20) and a second passageway (30) conducting the fuel retentate flow back to the fuel tank (12).
    公开号:SU1743344A3
    申请号:SU884356861
    申请日:1988-10-09
    公开日:1992-06-23
    发明作者:А.Тейлор Джон
    申请人:Сепарейшн Дайнэмикс, Инк. (Фирма)；
    IPC主号:
    专利说明:

    VI
    4 WITH
    with
    four
     WITH
    The invention relates to a system for separating dry hydrocarbon fuel, free from particles and water, from the total mass of fuel, and relates to a dry fuel supply system, free from particles, from the fuel tank to the engine and the fuel supply method.
    The purpose of the invention is to increase reliability by providing more complete fuel cleaning.
    Fig. 1 is a schematic diagram of the fuel supply system: Fig. 2 is a side elevation with a partial section of the filter; on fig.Z - hollow fiber, the section showing separation in a tangential stream.
    System 1 comprises a fuel tank 2 having an opening 3 for lowering. Tank 2 contains fuel 4. The fuel may be one of various types of fuel: gasoline, diesel fuel, jet fuel or other fuel, depending on the environment in which the system is used. In a preferred embodiment, the invention is shown by the example of a fuel supply system to a diesel engine and. therefore, this fuel1 is diesel 4. This fuel usually contains water, dissolved and suspended and particulate material. Pipeline 5 transfers fuel 4 from fuel tank 2 to engine 6. The system includes a first tangential flow separator 7 that communicates with pipe 5 to separate through a cross flow penetrating fuel flow, which is practically free from water and particles, from the fuel retaining flow fuel. The pipeline 5 includes a first channel 8, transmitting a penetrating flow of fuel to the injector that injects fuel into the engine, and a second channel 9. returning the fuel holding flow to the fuel tank 2.
    A tangential flow separator contains at least one separator module, as shown in FIG. 2. The separator module 7 has an inlet 10. The first outlet 11. Communicates with the first channel 8 and the second outlet 12. Communicates with the second channel 9. The separator module 7 contains an outer casing 13 with a plurality of hollow hydrophobic microporous BOLO membranes 14. they are located in the form of a bundle inside the polyurethane tube 15. The fibers 16 are embedded in the potting material 17 adjacent to the inlet 10. Each fiber 16 contains a hollow core 18, the fiber 16 having an inner surface 19 passing through g hollow core 18. Each fiber 16 also comprises an outer surface 20. The hollow core 18 of the fiber 16 forms a plurality of first chambers communicating between the inlet 10 and the second outlet 12, thus creating a first path for flow through the separator module 7. Case 13 the combinations with the outer surfaces 20 of the fibers 16 form a second chamber in communication with the first outlet 11. The fibers of the 16 membranes are microporous membranes separating the first and second chambers. The membrane fibers 16 run parallel to the first flow path, indicated by arrow A in FIG. 3, and are tangentially in contact with the flow path.
    Fibers 16 may contain a uniform layer of microporous material formed from hydrophobic materials, for example, polypropylene-based and fluorocarbon tetrafluoroethylene resins included in this group should be very resistant to degradation in the medium by hydrophilic elements, for example, water and water-soluble components, and also the hydrocarbon environment of the fuel.
    For example, a 10-inch module may contain 197 floors of fibers having an internal diameter of 0.6 mm and an average pore size of 0.20 mm. A 20 inch (508 mm) module may contain 440 hollow fibers having an internal diameter of 0.6 mm and an average pore size of 0.20 mm. All values are given with a tolerance of ± 10%.
    System 1 contains a plurality of pumps for actively pumping fuel from fuel tank 2 through pipe-line 5 to engine 6 with an axial flow rate of approximately 1 m / s to 3 m / s. The fuel consumption in system 1 can be from 1 gallon per hour to 65 gallons per hour or more. The fuel flow through the conduit 8 can be about 60% of the fraction pumped from the fuel tank 2 through the separator module 7.
    System 1 may include a primary pump 21 connected to pipe 5 between the fuel tank 2 and separator module 7. Secondary pump 22 may be connected to pipe 8 between the separator module 7 and the engine 6. The second channel 9 may include the first pipe 23. Pipeline 5 may also include a third channel 24 and a fluid communication connection between the fuel injector 25 and the fuel tank 32 for transferring a flow of overflow fuel from the fuel injector 25 to the fuel tank 2. Or a three-way valve in combination with the corresponding non-return valves can connect the third channel 24 to the second channel 9 and transfer the flow only in one direction from the third channel 24 to the second channel 9. The flow from the third channel 24 passes to return back to the tank 2. The backflow valve will prevent the return th stream of fuel from the third channel 24 to the tank 2.
    Unlike the prior art devices, which require the use of a coagulant and a separate filter of conventional design, the present invention offers one separating device that separates the fuel flow, essentially free of water and particles, from the fuel retention flow. This is achieved by a cross flow system having a hollow fiber membrane used in the separator module 7. The cross flow separator 7 is shown in FIG. The fuel travels in direction A. The fuel retention stream passes tangentially, as indicated by the arrows B. B. At the same time, the hydrophobic microporous membrane allows hydrocarbon fuels to pass through, but prevents particles and hydrophilic materials, such as water. The average pore size in the separation membrane is 0.2 microns (± 10%). However, the removal of impurities from the fluid flow in direction A does not depend on the size of the pores in the membrane, but on the speed of movement of the flow tangential to the surface of the membrane. The transverse flow system takes advantage of a known physical phenomenon in which particles suspended in a fluid flow passing at a certain speed and shear rate through the cylindrical geometry of the fibers 16. will tend to concentrate near the center of the flow and away from the inner surface 19 of the wall. Consequently, the powder material does not bake on the inner surfaces of the 19 fibers 16. The microporous hollow fiber membranes are free from any particles that can be deposited freely on the membrane during shutdown with a simple reverse pulse of a few seconds during start-up. Tests have shown that membrane hydrodynamics allows the system to process solid loads of a few parts per million to 15% or more for an extended period of time without significantly reducing the flow rate. Fuel consumption may range from
    how many gallons to over one thousand gallons per minute. Such hydrodynamics provides for the creation of sufficient and significantly penetrating toppi, having a significantly low degree of contamination with water or particles.
    As shown in FIG. 1, system 1 may include a second tangential flow liquid separator 26. The second separator 26 contains diffusion agent consisting essentially of unsupported non-porous hollow fiber fibers of cuproammonium regenerated cellulose, having solid, continuous inner and outer surfaces that diffuse only water and water soluble components from the fuel retention flow through one membrane surface. System 1 comprises means 27 for removing water from another surface of the hollow fiber membranes into waste blade 28.
    More precisely, the engine 6 contains the exhaust pipe 29, which passes the exhaust gases into the module of the second separator 26 and from it. Cellulose hollow fiber membranes located inside the separator module 26 have external surfaces and hollow internal cores. The housing 30 of the separator module 26 together with the outer surface of the fibers forms an outer chamber connected to the pipe 24 and the pipe 31 leading from the outlet in the separator module 26 to the fuel tank 2. The inner core of the cellulosic fibers inside the separator module 26 communicates with the exhaust pipe 29 and another an exhaust pipe 32 leading to the dump 28. The exhaust pipe 27 transfers the exhaust gases from the engine to the separator module 26 and from there, the exhaust pipe 29 communicates with the inner cores Cellulose fiber membranes to create a washing engine exhaust gas stream tangentially through the inner surface of cellulose fibers to the outside of the system. In a vehicle with a diesel engine, the blade 28 may be the environment in which exhaust gases transfer water separated from the fuel retention flow. Other systems are possible in which water may be required to be purified from hydrocarbon impurities. The present invention provides a means for first separating the amount of hydrocarbon from the fuel stream by defining the module of the first separator, and then separating the uncontaminated water stream using the module of the second separator 26.
    Alternatively or additionally, the separator module containing membranes from regenerated cuproammonium cellulose may be located in communication with the first channel 8 to remove any dissolved water from the flowing fuel stream from the first separator module 7. Thus, the engine 6 can be completely dry hydrocarbon fuel.
    The following examples illustrate the power of the present system during operation, in which the first and second modules of separators 7. 26 are connected in series.
    Example 1. A hollow fiber membrane device containing a first stage separator with a microporous membrane, having polypropylene membranes and a second stage separator with a membrane containing regenerated cuproammonium cellulose hollow fibers, introduced into the line of the system for testing suspended particles and water for removal and also to remove dissolved water from diesel fuel. h
    Membrane separator equipped with an electric fuel pump. Diesel fuel from a 55 gallon barrel was used to represent the truck's fuel tank. Diesel fuel was pumped through the inlet of the separator device of the first stage, allowing it to pass inside the polypropylene hollow fibers. The fuel coming out of the separator is allowed to pass along the outer surface of the hollow fibers of cuproammonium cellulose in the second stage separator. Measurement of suspended or free water in the passing fuel at the first stage was carried out using a water type analyzer, according to the method. ASTM D-2276 / 1P-216. The fuel retention flow from the first stage separator passed back to the tank. The fuel discharged from the second stage separator with a cuproammonium cellulose membrane was measured for water content. The content of particles was determined on fuel samples before it was introduced into the system and for fuel leaving the second stage separator. A device with a hollow fiber cellulose membrane was equipped with a small air pump to remove water, which was collected on the inner surfaces of the hollow fibers. Water was added to diesel fuel at a concentration of about 50 vol.%. This contaminated fuel circuit was called a holding side and was fitted with a sample opening. A quantity of fine dust AC was added to the 55 gallon diesel fuel tank for testing. The outgoing diesel fuel from the second stage separator was also directed to the sample port. The levels of dissolved water in a passing fuel stream were measured with a Karl-Fischer instrument. The amount of particle was determined using a Hiac particle counter. During actual use, conventional dry fuel (permeable) will be directed to the injection pump with positive displacement, which in turn will feed the fuel injectors on diesel fuel.
    0Results:
    Water in Diesel Water in Diesel
    fuel before separation - fuel after toraseparator
     24,998 parts to 6 ppm
    5 million
    Particle Count After Separator
    to separator 187/100 ml
    357.000 / 100 ml
    Particles were measured in the range of 1-100 microns.
    0 The total number of particles per 100 ml of sample was determined.
    Thus, a simple cross-flow purification method with a hollow fiber membrane using a membrane of micro porous hollow fibers and a regenerated cuproammonium cellulose membrane is able to remove all suspended water, suspended particles to below acceptable levels and also remove almost
    0 all dissolved water from diesel fuel and supply clean, dry fuel to the engine.
    Example 2. A sample of fuel type IP-5 for jet engines was obtained from
    5 US Navy. (The testing apparatus was the same as in Example 1, except that instead of a 55 gallon barrel, a 10 gallon stainless steel vessel was used). One gallon of seawater
    0 added in about 5 gallons of IP-5 fuel. The water content of the IP-5 fuel was determined after it passed through a polypropylene microporous membrane and again after passing through a module
    5 regenerated cuproammonium cellulose membrane. Powder material in the form of fine dust AC added IP-5 to the fuel at a concentration of about 1 wt.%.
    Results:
    in 1P-epara8, 7%
    About an hour
    IP-5 fuel after separation
    After the first stage of passage through a 80 micro ppm microporous membrane
    After passing through the membrane of cuproammonium-regenerated cellulose in the second stage, 4 parts per million. About 70. See the data shown in Table 1 in the Narair 10-1A-17 specification.
     These data slightly exceed the theoretical water saturation data for fuel IP-b at a temperature of 75 ° F, at which the water content determination test was performed (Fig. 2).
    These data are the result of medium retesting and it likely reflects the inadvertent contamination of the sample with airborne particles.
    Example 3. A let A type fuel sample for a jet engine was obtained from F AA. Equipment similar to that of Example 2 was used for testing. To five gallons of the letA fuel sample, water was added at a concentration of approximately 1000 ppm and powdered impurities in the form of iron oxide at a concentration of approximately 500,000 particles per 100 ml of fuel.
    Results:
    Before separatorAfter the first stage
    waters; h 1767 parts / 84 parts / million / million After the second gtdii
    7 ppm of particle 401.887 // 100 ml106 / 100 ml.
    Example 4. Fuel sample No. 2 for a household stove contaminated with an unknown amount of dirt and water was obtained from Dayton Power Co. Dayton Ohio. The device of Example 1 was used for testing.
    Results:
    To separatorAfter separator
    water 1.66% 1 stage 96 parts /
    /million
    2 stages 5 parts // million
    Example 5. A fuel sample of the type MILH83282 was obtained from the Bying company.
    Vertol Co. Water was added to the sample in an amount of about 3 wt.%. No particles were measured for this test. Results:
    Before separationAfter separation
    water 3.27% first stage
    84 particles / million second stage 2 parts / million
    0 (the number of particles was not counted).
    The present invention also relates to a method for supplying fuel from fuel tank 2 to engine 6. Typically, the method consists in the steps of sucking fuel from fuel tank 2, separating the penetrating fuel flow, which is essentially free of water and particles, from the trapped suction flow, transferring the penetrating fuel. fuel flow essentially free of
    0 water and particles in the engine 6 and return to the fuel tank 2 of the delayed flow of fuel.
    More precisely, the system operates by pumping fuel from the fuel
    5 tank 2 into the module of the first separator 7. Inside the module of the first separator 7, the fuel moves tangentially relative to the internal surfaces 19 of the plurality of microporous membranes 14 and hydrophobic
    0 porous fibers 16. The pump 22 continuously supplies a permeable flow of fuel through the first channel 8 to the nozzle 25, thus maintaining a differential across the membranes 14 and there is a positive
    5 action on hydrodynamics. The fuel retention flow is passed through pipelines 9-back to fuel tank 2. The transferred fuel retention stream can be cleaned of dissolved water and
    0 water-soluble components by passing it through a second separator module 66 containing hydrophilic fibers of regenerated cuproammonium cellulose. Then a separated stream of water and
    5 soluble components dissolved in water are removed from the system via conduit 32. And the delayed fuel flow is returned to tank 2 through conduit 31. To the module of the second separator 26 is flow
    0 delayed fuel passes directly in contact with and along the length of the set of the first solid and unsupported outer surfaces of a plurality of hollow non-porous membrane fibers of cuproammonium cellulose, and only water and soluble E dissolved water components from the delayed fuel flow selectively penetrate into the fibers.
    权利要求:
    Claims (15)
    [1]
    1. A fuel supply system from the fuel tank to the engine, comprising two pumps, a fuel tank connected by a feed pipe through the pump with fuel cleaning means that is connected through a pipeline with engine nozzles and through a drain pipe with a fuel tank, which what. In order to increase reliability by providing a more complete cleaning of the fuel, the fuel cleaning agent is designed as a separator with a tangential flow in fluid communication with the feed pipe to separate the filtered filtered flow from water and particles by means of a cross flow.
    [2]
    2. A system according to claim 1. characterized in that the means for cleaning fuel with a tangential flow includes at least one separator module having an inlet element, one exhaust element connected to the pipeline leading to the engine, and a second exhaust element and the separator module includes a first chamber for communicating the inlet element and the second outlet element, the second chamber for communicating the inlet element to the first outlet element and the hydrophobic microporous membrane section the first and second chambers, the membrane being placed parallel to the flow path with the possibility of tangential contact with it
    [3]
    3. The system according to claim 2, wherein that the membrane is made in the form of hollow fibers that have internal channels that pass through them and form a first chamber, and the separator module includes an outer casing, forming a second chamber.
    [4]
    4. A system according to Clause 3, characterized in that the fibers are made in the form of a uniform layer of microporous material made from the group including fluorocarbon polymers of polypropylene
    and tetrafluoroethylene.
    [5]
    5. The system according to claim 4, characterized in that it is provided with a second means of cleaning the fuel, which is a tangential flow separator in fluid communication with the feed pipe located between the first tangential flow separator and the engine for separating water and dissolved in water soluble components from the second residual fuel stream and the removal of water and dissolved in
    water soluble components and the direction of the second fuel residual flow into the engine.
    [6]
    6. The system according to claim 1, characterized in that it is provided with a second separator with a tangential flow in fluid communication with a supply pipe placed between the first separator with a tangential flow and the engine for separating water and soluble components dissolved in water from the second residual fuel flow and removing water and soluble components dissolved in water and directing the second residual fuel stream to the engine.
    [7]
    7. A system according to claim 5 or 6, characterized in that the second tangential flow separator includes diffusion means consisting of membranes with unsupported non-porous hollow fibers of cuproammonium cellulose having continuous continuous inner and outer surfaces to allow water to diffuse and soluble components dissolved in water from the residual fuel stream through one of said surfaces, and the system contains a means for removing water from said surfaces.
    [8]
    8. The system of claim 7, wherein the intake pipe of the engine of the vehicle is connected to the second separator in fluid communication with the inner surface of the membranes of cuproammonium cellulose to form a curved engine exhaust stream tangentially across the inner surface and out of the system.
    [9]
    9. The system according to claim 1, characterized in that it is provided with a pipeline placed between the fuel injection nozzles and the fuel tank for directing excess fuel from the injectors to the fuel tank.
    [10]
    10. The system according to claim 9, wherein it is provided with a pipeline positioned between the fuel injection nozzles and the fuel tank for directing excess FELT from the nozzles to the fuel tank.
    [11]
    11. The method of supplying fuel from the fuel tank to the engine, which consists in collecting fuel from the fuel tank, filtering the fuel stream from solid particles, directing the fuel stream into the fuel tank, which is different in that the filtering is performed from water and direct the fuel flow tangentially relative to the surface of the membranes of microporous hydrophobic hollow fibers and maintain the gradient of the filtered fuel through the membranes.
    [12]
    12. Method of pop, 11, characterized in that it directs the flow of fuel through the inner surfaces of the microporous membrane fibers and removes the filtrate from the outer surfaces of the microporous membrane fibers.
    [13]
    13. The method according to claim 12, which includes the removal of water and soluble components dissolved in water from the residual fuel, the direction of the residual fuel in the fuel tank and the direction of water and soluble in water filtrate components from the system.
    [14]
    14. The method according to p. 13, of tl and h ay y and y, so that during the removal of skip
    five
    the residual fuel current directly in contact with the first surface formed by hollow non-porous membrane fibers of cuproammonium cellulose and along it selectively filters the fibers by diffusing only water and soluble components dissolved in water from the residual fuel and sends the remainder of the cellulose membranes to the fuel tank and discharging the filtrate contained in the cellulosic membranes from the system.
    [15]
    15. The method according to 14 ,. characterized in that the engine exhaust gases are directed along the second surface of the cellulosic membrane fibers and gases containing water and soluble components dissolved in water are removed from the system.
    AT
    Fig.Z
    sixteen
    ft
    18
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    同族专利:
    公开号 | 公开日
    IL87688D0|1989-02-28|
    MY103416A|1993-06-30|
    AU2457288A|1990-08-02|
    KR890006968A|1989-06-17|
    NO884459L|1989-04-10|
    EP0311162A2|1989-04-12|
    US4814087A|1989-03-21|
    IL87688A|1992-05-25|
    CN1032841A|1989-05-10|
    JPH01138364A|1989-05-31|
    CN1017541B|1992-07-22|
    AU612188B2|1991-07-04|
    EP0311162A3|1990-01-24|
    NO884459D0|1988-10-07|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US07/107,261|US4814087A|1987-10-09|1987-10-09|Fuel delivery system|
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