CN110092001A - The fuel tank of aircraft is catalyzed inerting equipment - Google Patents

The fuel tank of aircraft is catalyzed inerting equipment Download PDF

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Publication number
CN110092001A
CN110092001A CN201910086744.2A CN201910086744A CN110092001A CN 110092001 A CN110092001 A CN 110092001A CN 201910086744 A CN201910086744 A CN 201910086744A CN 110092001 A CN110092001 A CN 110092001A
Authority
CN
China
Prior art keywords
reactant
fuel tank
catalytic reactor
source
inert gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910086744.2A
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Chinese (zh)
Inventor
L.L.史密斯
E.苏劳斯基
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamilton Sundstrand Corp
Original Assignee
Hamilton Sundstrand Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US15/882,296 external-priority patent/US20180148191A1/en
Application filed by Hamilton Sundstrand Corp filed Critical Hamilton Sundstrand Corp
Publication of CN110092001A publication Critical patent/CN110092001A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/14—Production of inert gas mixtures; Use of inert gases in general
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J4/00—Feed or outlet devices; Feed or outlet control devices
    • B01J4/008—Feed or outlet control devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00—Arrangements in connection with fuel supply for power plant
    • B64D37/32—Safety measures not otherwise provided for, e.g. preventing explosive conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00—Arrangements in connection with fuel supply for power plant
    • B64D37/34—Conditioning fuel, e.g. heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
    • B01J2204/002—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the feeding side being of particular interest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
    • B01J2204/005—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the outlet side being of particular interest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
    • B01J2204/007—Aspects relating to the heat-exchange of the feed or outlet devices

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The fuel tank inerting system and method for being used for aircraft are provided.The system comprises: fuel tank；First reactant source, first reactant source are fluidly connected to the fuel tank, and first source, which is arranged to, receives the fuel oil from the fuel tank；Second reactant source；Catalytic reactor, the catalytic reactor, which is arranged to, receives the first reactant from first source and the second reactant from second source to generate inert gas, and the inert gas is supplied to the fuel tank to fill the pasta upper space of the fuel tank；And back pressure current limiter, the back pressure current limiter is located in fuel tank supply line or along fuel tank supply line positioning and in the downstream of the catalytic reactor, the back pressure current limiter is arranged to the operation with high pressure for maintaining the catalytic reactor.

Description

The fuel tank of aircraft is catalyzed inerting equipment
Background technique
The subject matter disclosed herein relates generally to the fuel tank inerting system of aircraft, and more particularly, is related to being matched It is set to the fuel tank inerting system of the supplying inert gas in aircraft.
In general, aircraft pneumatic system is to be provided with power by engine bleed, and the aircraft pneumatic system includes Air handling system, cabin pressurization and cooling and fuel tank inerting system.For example, the pressurized air of the engine from aircraft Cabin is provided to via the series of system of the temperature and pressure of change pressurized air.In order to which this preparation to pressurized air supplies With power, generally, energy source is the pressure of air itself.
It can be used for environmental control system from the air of engine bleed, such as supplying air to cabin and confession It should be to other systems in aircraft.Additionally, can by from the air supply of engine bleed to inerting equipment with by indifferent gas Body is provided to fuel tank.In other situations, air can be originated from compression ram-air.
Regardless of what the source is, the air for being commonly used for fuel tank inerting, which passes through, is referred to as the more of " air separation module " The hollow-fibre membrane in hole is restrained.Control or passively operate downstream flow control valve with to air separation module apply back pressure with It forces a certain amount of air and flows through the pipe and pass through the film on the contrary.It is empty only to leave rich nitrogen more easily by the film for oxygen Gas continues through flow control valve and enters in fuel tank.In general, air separation module is using the dedicated punching press in conjunction with by-passing valve Air heat exchanger.
Summary of the invention
According to some embodiments, the fuel tank inerting system for aircraft is provided.The system comprises: fuel tank；First is anti- Material resource is answered, first reactant source is fluidly connected to the fuel tank, and first source is arranged to reception from the oil The fuel oil of case；Second reactant source；Catalytic reactor, the catalytic reactor are arranged to the received from first source To generate inert gas, the inert gas is supplied to the oil for one reactant and the second reactant from second source Case is to fill the pasta upper space of the fuel tank；And back pressure current limiter, the back pressure current limiter are located at fuel tank supply line It is interior or along the fuel tank supply line position and in the downstream of the catalytic reactor, the back pressure current limiter is arranged to Maintain the operation with high pressure of the catalytic reactor.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include that first source is evaporator vessel.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include the gas vent and at least one of aircraft cabin that second source is the engine of aircraft.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include heat exchanger, the heat exchanger assignment between the catalytic reactor and the fuel tank and by It is configured to be cooled down and condensed at least one operation in the output from the catalytic reactor, by inert gas and pair Product separates.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include providing the exhaust of the environmental control system from the aircraft to the heat exchanger so that energy The enough cooling output from the catalytic reactor.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include heating duct, the heating duct be thermally connected to the catalytic reactor and be arranged to it is described First source thermal communication is to provide heat to first source to generate first reactant.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include syringe pump, and the syringe pump, which is arranged to, receives first reactant and second reaction Object and the mixture of first reactant and second reactant is supplied to the catalytic reactor.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include inert gas recirculating system, and the inert gas recirculating system is located at the catalytic reactor The upstream in downstream and the fuel tank, wherein the inert gas recirculating system is arranged to a part of the inert gas It is directed to the catalytic reactor.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include at least one additional fuel tank, wherein at least one described additional fuel tank is arranged to reception from described The inert gas of catalytic reactor.
Other than one or more features described herein, or alternatively, the fuel tank inerting system it is other Embodiment may include the water between the catalytic reactor and the fuel tank and in the catalytic reactor downstream Separator, the separator, which is arranged to from the first reactant reacted and the second reactant, extracts water.
According to some embodiments, the method that inert gas is supplied to the fuel tank of aircraft is provided.The described method includes: will Fuel from fuel tank is supplied to the first reactant source；The first reactant is generated in first reactant source；It is anti-by described first Object is answered to mix with the second reactant supplied from the second reactant source；In catalytic reactor the first reactant of catalytic mixing and Second reactant is to generate inert gas；The inert gas is supplied to the fuel tank to fill the pasta top of the fuel tank Space；And the operation with high pressure of the catalytic reactor is maintained using back pressure current limiter, the back pressure current limiter is located at fuel tank It is positioned in supply line or along the fuel tank supply line and in the downstream of the catalytic reactor.
Other than one or more features described herein, or alternatively, the method other embodiments It may include first source is evaporator vessel.
Other than one or more features described herein, or alternatively, the method other embodiments It may include the gas vent and at least one of aircraft cabin that second source is the engine of aircraft.
Other than one or more features described herein, or alternatively, the method other embodiments It may include at least one operation for being cooled down and being condensed by heat exchanger in the output from the catalytic reactor To separate inert gas and by-product, the heat exchanger assignment is between the catalytic reactor and the fuel tank.
Other than one or more features described herein, or alternatively, the method other embodiments It may include that the exhaust of the environmental control system from the aircraft is supplied to the heat exchanger and enables to cool down to come From the output of the catalytic reactor.
Other than one or more features described herein, or alternatively, the method other embodiments It may include that first reactant source is heated by heating duct, the heating duct is thermally connected to the catalytic reactor And it is arranged to first source thermal communication to provide heat to first source to generate first reactant.
Other than one or more features described herein, or alternatively, the method other embodiments It may include that first reactant is mixed with second reactant and is injected using syringe pump with by described first The mixture of reactant and second reactant is supplied to the catalytic reactor.
Other than one or more features described herein, or alternatively, the method other embodiments It may include that a part of the inert gas is made to recycle and recycling is partly supplied to the catalytic reactor.
Other than one or more features described herein, or alternatively, the method other embodiments It may include that the inert gas is supplied at least one additional fuel tank from the catalytic reactor.
Other than one or more features described herein, or alternatively, the method other embodiments It may include extracting water from the first reactant reacted and the second reactant using separator, the separator is located at Between the catalytic reactor and the fuel tank and in the catalytic reactor downstream.
Unless expressly indicated otherwise, otherwise preceding feature and element can non-exclusively be combined into various combinations.Mirror In the following description and drawings, these features and element and its operation will become to become readily apparent from.However, it should be understood that retouching below It states and is intended for illustrative and illustrative with the property of schema and is non-limiting.
Detailed description of the invention
Particularly pointing out and being distinctly claimed in the claims at this specification end is considered as this hair Bright theme.From carried out in conjunction with attached drawing it is described in detail below in, feature and advantage above-mentioned and other of the invention are aobvious And it is clear to, in which:
Figure 1A is can be in conjunction with the schematic diagram of the aircraft of the various embodiments of the disclosure；
Figure 1B is the schematic diagram of the compartment section of the aircraft of Figure 1A；
Fig. 2 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 3 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 4 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 5 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 6 A is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 6 B is the schematic diagram of a part of the fuel tank inerting system of Fig. 6 A；
Fig. 7 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 8 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Fig. 9 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Figure 10 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Figure 11 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Figure 12 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；
Figure 13 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure；And
Figure 14 is the schematic diagram according to the fuel tank inerting system of the embodiment of the disclosure.
Specific embodiment
As shown in Figure 1A to Figure 1B, aircraft 101 may include one or more compartments 103 below central wing box. Compartment 103 can accommodate and/or support one or more components of aircraft 101.For example, in some configurations, aircraft 101 It may include environmental control system and/or fuel oil inerting system in compartment 103.As shown in fig. 1b, compartment 103 include every Between door 105, the compartment door realizes the peace to one or more components (for example, environmental control system, fuel oil inerting system etc.) It fills and close.Sky during the environmental control system of aircraft 101 and/or the operation of fuel oil inerting system, outside aircraft 101 Gas can flow into one or more environmental control systems in compartment door 105 via one or more ram-air entrances 107. Air can then flow through environmental control system with various parts that are processed and being supplied in aircraft 101 or position (for example, Main cabin, fuel oil inerting system etc.).Some air can be discharged via one or more ram-air outlets 109.
It also shows that aircraft 101 includes one or more engines 111 in Figure 1A.Engine 111 is typically mounted on aircraft On 101 wing, but can be located elsewhere, this will depend on specific aircraft configuration.In some aircraft configurations, such as It will be apparent to those skilled in the art that air can release from engine 111 and be supplied to environmental control system and/or fuel oil is lazy Change system.
As noted above, typical air separation module is operated using pressure difference to realize desired air separation.This Class system needs high-pressure pneumatic source to drive the separation process across the film.In addition, usually used Middle hollow fiber membrane The size and weight of device are relatively large, this is the important consideration about aircraft (for example, the reduction of the volume and weight of component can be with Improve flight efficiency).Embodiment provided herein provide the inert gas of aircraft or the volume of hypoxemia supply system and/or The characteristic that weight reduces.In addition, embodiment provided herein can prevent humid air from entering the fuel tank of aircraft, therefore prevent The various problems that some fuel-system components are likely to occur.According to some embodiments of the disclosure, with catalysis system (for example, CO2Generation system) typical hollow fiber membrane separator is substituted, the catalysis system may be (for example) than typical tunica fibrosa Separator is small, light and/or more effective.That is, can be removed according to the embodiment of the disclosure to Middle hollow fiber membrane The use of device.
The function that system is reduced according to the fuel tank combustibility of the embodiment of the disclosure is by making a small amount of fuel vapor (for example, " first reactant ") reacts to complete with the source of oxygen-containing gas (for example, " second reactant ").The product of the reaction It is carbon dioxide and vapor.The source of second reactant (for example, air) can be any other source of bleed or oxygen-containing air, Including but not limited to high-voltage power supply (for example, engine), bleed, cabin air etc..Cause chemical reaction using catalyst material, Including but not limited to precious metal material.It is by the carbon dioxide that the reaction generates and is naturally present in fresh air/environment sky The inert gas of nitrogen mixing in gas, and be directed back into fuel tank to generate inert environments in fuel tank, therefore reduce oil The combustibility of steam in case.In addition, in some embodiments, the fuel tank combustibility of the disclosure is reduced or inerting system can be with Functionality is provided, so that the vapor from atmosphere will not enter fuel tank during the decline stage of aircraft navigation.This can lead to The flow rate that control inert gas enters in fuel tank is crossed to complete, so that constantly maintaining normal pressure in fuel tank.
According to the embodiment of the disclosure, cause oxygen (O using catalyst2) and fuel vapor between chemical reaction with Generate carbon dioxide (CO2) and vapor.O used in the reaction2Source can come from any one of many sources, including But it is not limited to the pneumatic source of air of the supply under the pressure higher than environmental pressure on aircraft.Fuel vapor is by that will lack Amount fuel oil is discharged in evaporator vessel from fuel tanker and is generated.If shown and describing in some embodiments of the present disclosure, It can be with heated fuel oil so that fuel gasification, such as by using electric heater.In some embodiments, it will be fired by injector Oil vapour is removed from evaporator vessel, and the injector can trigger extract fuel vapor from evaporator vessel out suction pressure Power.Such injector can use containing O2The high pressure of the second reactant source (for example, pneumatic source) cause the two of injector Secondary stream, the Secondary Flow are originated from evaporator vessel.In this way, can be used injector by extracted fuel vapor with from the The O of two reactant sources2Mixing.
Mixed air-flow (fuel vapor and oxygen or air) is then introduced into catalyst, the catalyst can cause O2 It is transformed into CO with fuel vapor2With the chemical reaction of vapor.Any inert gas species (example present in the mixed flow Such as, nitrogen) it will not react and therefore will steadily pass through catalyst.In some embodiments, catalyst is in and is used as The form factor of heat exchanger.For example, it in a kind of non-limiting configuration, is configured using plate fin type heat exchanger, wherein The hot side of the heat exchanger is coated with catalyst material.In such arrangement, cold air source (such as ram-air can be used Or certain other cold air source) come the cold side for catalyst heat exchanger of feeding.It can control the air of the cold side by heat exchanger, So that the temperature of the mixed airflow of heat heat enough is in catalyst or place maintains desired chemical reaction.Further, it is possible to use Cooling air maintains the temperature cold enough to enable to remove by the heat of the exothermic reaction generation of catalyst.
As noted above, catalytic chemistry reaction generates vapor.The water (in any form) is set to may be into main fuel tank It is unwanted.Therefore, according to the embodiment of the disclosure, can be removed by various mechanism (including but not limited to condensing) come From the water of product gas flow (for example, leaving catalyst).Product gas flow can be guided to enter the heat exchanger in catalyst downstream, institute Heat exchanger is stated for cooled product air-flow, so that vapor is condensed and fallen from product gas flow.It then can be by liquid water It exhausts.In some embodiments, optional separator can be used to enhance or provide the separation of water and product stream.
In some embodiments, the flow of flow control valve measurement inert gas (vapor is removed from it) makes up to Predetermined and/or controlled inert gas flow rate.In addition, in some embodiments, it is lazy to increase that optional fan can be used Property stream pressure with overcome between catalyst and the fuel tank that inert gas is supplied to conduit and flowline it is associated Pressure decline.In some embodiments, fire arrester can be arranged in the entrance of fuel tank (inert gas enters the fuel tank) Sentencing prevents any possible flame propagation into fuel tank.
System is reduced independently of any aircraft combustibility, fuel tanker is usually communicated with environment.In high-altitude, fuel tank internal Pressure is very low and is approximately equal to environmental pressure.However, the pressure of fuel tank internal needs to increase to be equal to Hai Ping during decline At face (or aircraft landing in any height at) environmental pressure.Pressure change requirement gas is externally entering fuel tank so that pressure Power is balanced.When air is externally entering fuel tank, vapor would generally exist therewith.Water may be trapped in fuel tank and Cause problem.According to the embodiment of the disclosure, water enters fuel tank in order to prevent, and the fuel oil inerting system of the disclosure can be with such as The dry inert gas generated as described by above and below is pressurized fuel tank again.It can be controlled by using flow control valve Stream of the inert gas into fuel tank is so that maintain normal pressure constantly in fuel tank to complete described to be pressurized again.Positive pressure in fuel tank Power can prevent the air during decline to be externally entering fuel tank and therefore prevent water from entering fuel tank.
Fig. 2 is reduced according to the flammable of inert gas that generated using catalysis reaction of an embodiment of the disclosure Or the schematic diagram of inerting system 200.As indicated, inerting system 200 includes fuel tank 202 wherein with fuel oil 204.In fuel oil 204 during one or more power operations when being consumed, and pasta upper space 206 is formed in fuel tank 202.In order to reduce Combustibility risk associated with the gasified fuel that may be formed in pasta upper space 206, can produce inert gas simultaneously It is fed in pasta upper space 206.
According to the embodiment of the disclosure, can be extracted in evaporator vessel 210 from fuel tank 202 by inerting fuel oil 208. The amount for the fuel oil 204 being extracted in evaporator vessel 210 can be controlled by evaporator vessel valve 212 (such as float valve) (that is, amount of inerting fuel oil 208).It may can be in evaporator in the inerting fuel oil 208 of liquid form when being extracted out from fuel tank 202 It is vaporized using heater 214 (such as electric heater) in container 210 to generate the first reactant 216.First reactant 216 It is the vaporizing section of the inerting fuel oil 208 in evaporator vessel 210.By the first reactant 216 and it is originated from the second reactant Second reactant 218 in source 220 mixes.Second reactant 218 is oxygen containing air, the first reactant of the oxygen containing air 216 are catalyzed to generate the inert gas in the pasta upper space 206 for being supplied to fuel tank 202.Second reactant 218 can With any source on aircraft under the pressure bigger than environmental pressure, bleed including but not limited to from engine, Cabin air, the pressure-air for extracting or releasing from engine etc. are (that is, any second reactant source 220 can take any number Purpose configuration and/or arrangement).It can be by mixer 224 and/or via mixer 224 by first in evaporator vessel 210 Reactant 216 and the second reactant 218 are directed in catalytic reactor 222, and the mixer in some embodiments can be with It is injector or jet pump.First reactant 216 and the second reactant 218 will be mixed into mixed airflow by mixer 224 225。
Catalyst 222 can be controlled temperature to ensure desired chemical reaction efficiency, allow to through inerting system System 200 effectively generates inert gas by mixed airflow 225.It is, therefore, possible to provide cooling air 226 is with from catalytic reactor 222 extract heat to provide desired heat condition for the chemical reaction in catalytic reactor 222.Cooling air 226 can be originated from Cold air source 228.Catalytic mixing object 230 leaves catalytic reactor 222 and by heat exchanger 232.232 conduct of heat exchanger Condenser works separating inert gas 234 and by-product 236 to catalytic mixing object 230.By cooling air supply to heat To realize that condensation is functional in exchanger 232.In some embodiments, as indicated, cooling air 226 can be originated from and be mentioned It is supplied to the identical cold air source 228 of cold air of catalytic reactor 222, but in other embodiments, described two components Cold air source may be different.By-product 236 can be liquid water or vapor, and therefore currently match shown in Fig. 2 In setting, separator 238 is equipped with to extract liquid water or vapor from catalytic mixing object 230, therefore in 232 downstream of heat exchanger Only leave the pasta upper space 206 that inert gas 234 is provided to fuel tank 202.
Inerting system 200 may include additional components, including but not limited to fan 240, fire arrester 242 and controller 244. It may include various other components without departing from the scope of the present disclosure.In addition, in some embodiments, being wrapped Certain in the component included some can be optional and/or be removed.For example, in some arrangements, fan can be saved 240 and/or separator 238.Controller 244 can operationally be communicated with one or more sensors 246 and valve 248 with reality Now to the control of inerting system 200.
In one non-limiting example, by inerting system 200 by causing oxygen (using catalytic reactor 222 Two reactants 218) and fuel vapor (the first reactant 216) between chemical reaction to generate carbon dioxide (inert gas 234) and in the water (by-product 236) of vapor phase flammable reduction is realized.Second reactant 218 used in the reaction The source of (for example, oxygen) can come from any source under the pressure bigger than environmental pressure on aircraft.By by a small amount of fuel oil 204 are discharged in evaporator vessel 210 from fuel tank 202 (for example, main fuel tanker) and generate fuel vapor (the first reactant 216).Carry out the inertia fuel oil 208 in heating evaporation device container 210 using electric heater 214.In some embodiments, pass through Cause extract the first reactant 216 (for example, fuel vapor) from evaporator vessel 210 out suction pressure using mixer 224 Power to remove the first reactant 216 (for example, fuel vapor) from evaporator vessel 210.In such embodiment, mixer 224 cause Secondary Flow using the high pressure of the second reactant source 220 in mixer 224, and the Secondary Flow holds from evaporator Device 210.In addition, as noted above, using mixer 224 come by two air-flows (the first reactant 216 and the second reactant 218) it mixes to form mixed airflow 225.
Mixed airflow 225 (for example, fuel vapor and oxygen or air) is then introduced into catalytic reactor 222, causing will Mixed airflow 225 (for example, fuel oil and air) is transformed into inert gas 234 and by-product 236 (for example, carbon dioxide and water Steam) chemical reaction.It note that any inert gas species (for example, nitrogen) present in mixed airflow 225 will not rise instead It answers and therefore will steadily pass through catalytic reactor 222.In some embodiments, catalytic reactor 222 is in be used as heat The form factor of exchanger.For example, a kind of non-limiting configuration can be plate fin type heat exchanger, wherein the heat exchange The hot side of device is coated with catalyst material.Those skilled in the art will be appreciated that without departing from the scope of the present disclosure the case where Under, it can be using various types and/or the heat exchanger of configuration.Can be used to from cold air source 228 (for example, ram-air or Certain other cold air source) cooling air 226 come the cold side for catalyst heat exchanger of feeding.It can control and handed over by catalyst heat The air of the cold side of parallel operation, so that the temperature of the mixed airflow 225 of heat heat enough is to remain desired in catalytic reactor 222 Chemical reaction, but it is cold enough to remove the heat generated by exothermic reaction, therefore maintain aircraft safety and surpass material will not Cross maximum temperature limitation.
As noted above, the chemical reaction process in catalytic reactor 222 may generate by-product, including be in steam The water of form.It may be unwanted for so that water (in any form) is entered fuel tank 202.It therefore, can be by condensing from product gas It flows (that is, inert gas 234) and removes water by-product 236.For this purpose, catalytic mixing object 230 is made to enter heat exchanger 232, the heat Exchanger allows to remove by-product 236 (for example, the condensation of most vapor is simultaneously for cooling down catalytic mixing object 230 And fallen from catalytic mixing object 230).By-product 236 (for example, liquid water) can then be exhausted.Optional water can be used Separator 238 completes this function.
Flow control valve 248 positioned at heat exchanger 232 and optional 238 downstream of separator can measure inert gas 234 flow makes up to wanted flow rate.Optional force(d) (draft) fan 240 can be used to increase the air-flow pressure of inert gas 234 Power is associated to the conduit between the emission point in fuel tank 202 with inert gas 234 with the outlet in heat exchanger 232 to overcome Pressure decline.Fire arrester 242 in the inlet of fuel tank 202, which is arranged to, prevents any possible flame propagation to fuel tank In 202.
In general, reducing system independently of any aircraft combustibility, fuel tanker (for example, fuel tank 202) needs and environment phase It is logical.Therefore, as shown in Figure 2, fuel tank 202 includes ventilation hole 250.In high-altitude, the pressure inside fuel tank 202 is very low and about Equal to environmental pressure.However, during decline, the pressure inside fuel tank 202 needs to increase to be equal at sea level (or aircraft At any height of Lu Yu) environmental pressure.Gas is required to be externally entering fuel tank 202 in this way so that pressure is balanced.Work as air When being externally entering fuel tank 202, vapor may be carried in fuel tank 202 by surrounding air.In order to prevent water/vapor into Enter fuel tank 202, inerting system 200 can be pressurized fuel tank 202 with the inert gas 234 generated by inerting system 200 again.This It is completed by using valve 248.For example, one of valve 248, which can be, is fluidly arranged in 222 downstream of catalytic reactor Flow control valve 252.Flow control valve 252 can be used to control inert gas 234 to the stream in fuel tank 202, so that always It is the normal pressure maintained in fuel tank 202 slightly.Such normal pressure can prevent the surrounding air during decline to be externally entering Fuel tank 202 and therefore prevent water from entering fuel tank 202.
As noted above, controller 244 can be operatively attached to the various parts of inerting system 200, including but It is not limited to valve 248 and sensor 246.Controller 244 may be configured to receive input from sensor 246 with control valve 248 simultaneously And the inert gas 234 of proper level is therefore maintained in pasta upper space 206.In addition, controller 244 can be arranged Ensure the pressure of appropriate amount in fuel tank 202, so that surrounding air will not enter the pasta of fuel tank 202 during aircraft decline Upper space 206.
In some embodiments, inert gas can be supplied to multiple fuel tanks on aircraft by inerting system 200.Such as figure Shown in 2 embodiment, fuel tank 202 is fluidly connected to evaporator vessel 210 by inerting supply line 254.It is lazy generating After property gas 234, as schematically shown, inert gas 234 will flow through fuel tank supply line 256 with by inert gas 234 It is supplied to fuel tank 202 and is optionally supplied to additional fuel tank 258.
Turning now to Fig. 3, the embodiment that shows the inerting system 300 according to the disclosure.Inerting system 300 can be similar In the inerting system being shown and described above, and it therefore may not show or discuss for the sake of simplicity similar characteristics.Inerting System 300 makes it possible to remove the heater for making the inerting fuel gasification in evaporator vessel.
As indicated, inerting system 300 includes fuel tank 302 wherein with fuel oil 304, wherein in fuel oil 304 in validity period Between pasta upper space 306 is formed when being consumed.As described above, inerting supply line 354 fluidly connects fuel tank 302 To evaporator vessel 310.It can be by the operation of evaporator vessel valve 312 (such as float valve) and/or controller 344 and/or logical The control of the progress of controller 344 is crossed to control the amount for the fuel oil 304 being extracted in evaporator vessel 310 (that is, inerting fuel oil 308 amount).Make the vaporization of inerting fuel oil 308 to generate the first reactant 316 for using in catalytic reactor 322.As above Described by text, the second reactant can be originated from the second reactant source 320.First reactant and the second reactant are in catalytic reactor Reaction is supplied in one or more fuel tanks (for example, fuel tank 302) in 322 with generating inert gas.
In this embodiment, as described above, cold air source 328 (such as ram-air) is provided to urge to realize Change the cooling of reactor 322 and realizes condensation function in heat exchanger 332.As described above, 332 conduct of heat exchanger Condenser works separating inert gas and by-product to catalytic mixing object.In this embodiment, cooling air source From cold air source 328 identical with the cold air for being provided to catalytic reactor 322.
In order to provide the thermal energy for vaporizing inerting fuel oil 308, it is better than using heating element or device, it can be from urging Change reactor 322 and supplies thermal energy.That is, can will be by the exothermic reaction of catalytic reactor 322 via heating duct 362 The hot-air 360 of generation is directed in evaporator vessel 310 and/or is guided through the evaporator vessel.Heating duct 362 can To pass through the inside of evaporator vessel 310, can be wrapped on evaporator vessel 310 and/or can have another arrangement, make Obtaining the thermal energy in hot-air 360 can be passed in inerting fuel oil 308 with therefore vaporize inerting fuel oil 308.Advantageously, this Class configuration can reduce the weight of system by removing heater shown in Fig. 2.
Various embodiments provided herein are gone for heater (for example, heater 214 shown in Fig. 2) It removes.A kind of arrangement is to use the excessive heat from catalytic reactor shown in Fig. 3.In other embodiments, as follows It is described, it being directly injected into using fuel from fuel tank.Therefore, such system (such as Fig. 4 to system shown in fig. 7) can Using the direct injection system with various configurations.In such embodiment, typical heater is removed, and first Reactant is derived directly from fuel tank or evaporator vessel.
Turning now to Fig. 4, the embodiment that shows the inerting system 400 according to the disclosure.Inerting system 400 can be similar In the inerting system being shown and described above, and it therefore may not show or discuss for the sake of simplicity similar characteristics.Inerting System 400 makes it possible to remove the heater for making the inerting fuel gasification in evaporator vessel.
As indicated, inerting system 400 includes fuel tank 402 wherein with fuel oil 404, wherein in fuel oil 404 in validity period Between pasta upper space 406 is formed when being consumed.As described above, inerting supply line 454 fluidly connects fuel tank 402 To evaporator vessel 410.It can be by the operation of evaporator vessel valve 412 (such as float valve) and/or controller 444 and/or logical The control of the progress of controller 444 is crossed to control the amount for the fuel oil 404 being extracted in evaporator vessel 410 (that is, inerting fuel oil 408 amount).Being better than vaporizes inerting fuel oil 408 before inerting fuel oil 408 is supplied in catalytic reactor 422, can incite somebody to action A part of inerting fuel oil 408 in evaporator fuel tank container 410 is extracted in liquid form and is subsequently injected into air-flow, Make a part of inerting fuel gasification in the air-flow.In such embodiment, as shown in Figure 4, such as schematically Ground is shown, and evaporator vessel 410 can be fluidly connected to 420 supply line of the second reactant source by gravity supply line 464 Supply line.When inerting fuel oil 408 enters supply line, fuel gasification is to generate the first reactant.First reactant with Second reactant reacts in catalytic reactor 422 is supplied to one or more fuel tanks (for example, oil to generate inert gas Case 402) in.It is similar with previous example, as described above, cold air source 428 (such as ram-air) is provided to realize The cooling of catalytic reactor 422 and the realization condensation function in heat exchanger 432.As described above, heat exchanger 432 is made It works catalytic mixing object to separate inert gas and by-product for condenser.In this embodiment, cooling air From cold air source 428 identical with the cold air for being provided to catalytic reactor 422.Because inerting fuel oil 408 is with gravity It is fed into the supply line of the second reactant 420 and vaporizes wherein, so holding it is not necessary that heater is mounted on evaporator In device 410 or it is installed on evaporator vessel 410.That is, by inerting fuel oil 408 be directly injected into the second reactant with Generate the composition that will be reacted in catalytic reactor 422.
Turning now to Fig. 5, the embodiment that shows the inerting system 500 according to the disclosure.Inerting system 500 can be similar In the inerting system being shown and described above, and it therefore may not show or discuss for the sake of simplicity similar characteristics.Inerting System 500 makes it possible to remove the heater for making the inerting fuel gasification in evaporator vessel.
As indicated, inerting system 500 includes fuel tank 502 wherein with fuel oil 504, wherein in fuel oil 504 in validity period Between pasta upper space 506 is formed when being consumed.As described above, inerting supply line 554 fluidly connects fuel tank 502 To evaporator vessel 510.It can be by the operation of evaporator vessel valve 512 (such as float valve) and/or controller 544 and/or logical The control of the progress of controller 544 is crossed to control the amount for the fuel oil 504 being extracted in evaporator vessel 510 (that is, inerting fuel oil 508 amount).Being better than vaporizes inerting fuel oil 508 before inerting fuel oil 508 is supplied in catalytic reactor 522, can make Inerting fuel oil 508 is vaporized and is injected using syringe pump 566, and the syringe pump is also used to the inerting fuel oil that will be vaporized 508 (the first catalyst) are mixed with the second reactant provided from the second reactant source 520.First reactant is reacted with second Object reacts in catalytic reactor 522 is supplied to one or more fuel tanks (for example, fuel tank 502) to generate inert gas In.It is similar with previous example, as described above, cold air source 528 (such as ram-air) is provided to realize that catalysis is anti- It answers the cooling of device 522 and realizes condensation function in heat exchanger 532.As described above, heat exchanger 532 is as condensation Device works separating inert gas and by-product to catalytic mixing object.Because inerting fuel oil 508 is to pass through syringe at it Vaporization when pumping 566, so it is not necessary that heater to be mounted in evaporator vessel 510 or be installed on evaporator vessel 510.Also It is to say, inerting fuel oil 508 is directly injected into the second reactant to generate the combination that will be reacted in catalytic reactor 522 Object.
In some embodiments, syringe pump 566 includes providing two or more individual elements of specific function. For example, as shown in Figure 5, syringe pump 566 includes: pump 566a, and the pump, which is arranged to, arrives 508 pumping of inerting fuel oil High pressure；With syringe/mixer 566b, the syringe/mixer, which is arranged to, is injected into inerting fuel oil 508 from second In the air-flow of reactant source 520.
Turning now to Fig. 6 A to Fig. 6 B, the embodiment that shows the inerting system 600 according to the disclosure.Inerting system 600 It can be similar to the inerting system being shown and described above, and therefore may not show or discuss for the sake of simplicity similar spy Sign.Inerting system 600 makes it possible to remove the heater for making the inerting fuel gasification in evaporator vessel.
As indicated, inerting system 600 includes fuel tank 602 wherein with fuel oil 604, wherein in fuel oil 664 in validity period Between pasta upper space 606 is formed when being consumed.With above-described embodiment on the contrary, inerting supply line 654 is by fuel tank 602 are directly fluidly connected to catalytic reactor 622.In this embodiment, fuel oil pump assembly 668 is mounted on inerting confession It answers in pipeline 654 or is installed along the inerting supply line, the inerting supply line is for making inerting fuel oil (from fuel oil 604) it vaporizes and is mixed with the second reactant from the second reactant source 620, wherein the mixture is supplied to catalysis instead Answer device 622 to be catalyzed.The operation of fuel oil pump assembly 668 can be controlled by controller 644.
Fig. 6 B shows the exemplary details of fuel oil pump assembly 668.As indicated, using fuel pump 668a from 602 pumping of fuel tank Fuel oil is injected into high-pressure air feed nozzle 668b by fuel oil, the fuel pump.High-pressure air feed nozzle 668b will make 604 vapour of fuel oil Change, the fuel oil then mixes in mixing chamber 668c with the second reactant supplied from the second reactant source 620.Then will Mixture is supplied to catalytic reactor 622.In configuration shown in fig. 6b, as schematically shown, the second reactant is come from A certain amount of air in source 620 will be supplied to high-pressure air feed nozzle 668b.
It will be appreciated that, Fig. 6 B is only illustrative, and itself and it is unrestricted.It will be apparent to those skilled in the art that Fig. 6 B Shown in illustrative arrangement be example, and without departing from the scope of the present disclosure, others arrangement and/or configuration It is possible.For example, single-stage pump/syringe can be used, wherein in a single step that all fuel oils (the first source) are straight It connects and is ejected into all air (the second source).
Turning now to Fig. 7, the embodiment that shows the inerting system 700 according to the disclosure.Inerting system 700 can be similar In the inerting system being shown and described above, and it therefore may not show or discuss for the sake of simplicity similar characteristics.Inerting System 700 makes it possible to remove the heater for making the inerting fuel gasification in evaporator vessel.
As indicated, inerting system 700 includes fuel tank 702 wherein with fuel oil 704, wherein in fuel oil 704 in validity period Between pasta upper space 706 is formed when being consumed.As described above, inerting supply line 754 fluidly connects fuel tank 702 To evaporator vessel 710.By the operation of evaporator vessel valve (such as float valve) and/or controller 744 and/or control can be passed through Control that device 744 processed carries out controls the amount for the fuel oil 704 being extracted in evaporator vessel 710 (that is, inerting fuel oil 708 Amount).It is first anti-for using in catalytic reactor 722 to generate to make the vaporization of inerting fuel oil 708 in evaporator vessel 710 Answer object.As described above, the second reactant can be originated from the second reactant source 720.First reactant and the second reactant exist Reaction is supplied in one or more fuel tanks (for example, fuel tank 702) in catalytic reactor 722 with generating inert gas.
In this embodiment, in order to provide the thermal energy for vaporizing inerting fuel oil 708, it is better than using heater member Part or device can supply thermal energy from the second reactant source 720.That is, can will be quite warm via heating duct 770 Air (such as from the bleed of turbogenerator) is directed in evaporator vessel 710 and/or guides to be held by the evaporator Device.Heating duct 770 can pass through the inside of evaporator vessel 710, can be wrapped on evaporator vessel 710 and/or can be with It is arranged with another kind, the thermal energy in heating duct 770 is allowed to be passed in inerting fuel oil 708 with therefore fire inerting Oil 708 vaporizes.
It is described although heating is provided to generate the first reactant (for example, vaporization of fuel oil) in inerting fuel oil The catalyst of system is exothermic and therefore generates heat.Accordingly, it may be desirable to temperature be controlled, so that the system will not overheat And/or allow to maintain the effective temperature of catalysis for first and second reactant in catalyst.In order to realize Such temperature control, provides various systems herein.
Turning now to Fig. 8, the embodiment that shows the inerting system 800 according to the disclosure.Inerting system 800 can be similar In the inerting system being shown and described above, and it therefore may not show or discuss for the sake of simplicity similar characteristics.Inerting System 800 cools down one or both of catalytic reactor 822 and/or heat exchanger 832 using various air-sources.Namely It says, cold air source 828 can substitute typical ram-air source.
As indicated, inerting system 800 includes fuel tank 802 wherein with fuel oil 804, wherein in fuel oil 804 in validity period Between pasta upper space 806 is formed when being consumed.As described above, fuel tank 802 is fluidly connected to by inerting supply line Evaporator vessel 810.It can be carried out by the operation of evaporator vessel valve and/or controller 844 and/or by controller 844 Control control the amount (that is, amount of inerting fuel oil 808) of the fuel oil 804 being extracted in evaporator vessel 810.It says at this In bright property embodiment, make the vaporization of inerting fuel oil 808 to generate the first reactant using heater 814.Second reactant source It is mixed from the second reactant source 820, and by the first reactant with the second reactant.First reactant of mixing is reacted with second Object reacts in catalytic reactor 822 is supplied to one or more fuel tanks (for example, fuel tank 802) to generate inert gas In.The reaction occurred in catalytic reactor 822 generates heat, wherein the catalysate of heat flows in heat exchanger 832.As above It is pointed, for catalytic reactor 822 and/or heat exchanger 832 cooling (for example, for cold air supply and heat transmitting) Usually ram-air.
In the present embodiment, cold air source 828 is not ram-air, and another position being derived from aircraft.It lifts For example, in some embodiments, cold air source 828 can be discharged from the environmental control system of aircraft.Using from environment The outlet air of control system can enable to more water in condensation inert gas and prevent such steam from flowing to fuel tank In 802.In another embodiment, cold air source 828 can be discharged from the cabin of aircraft.In such embodiment, cabin The use of room air can reduce ram-air and release, and therefore reduce aircraft drag.In any arrangement, as retouched above It states, provides cold air source 828 to realize the cooling of catalytic reactor 822 and the realization condensation function in heat exchanger 832.Such as Described above, heat exchanger 832 works separating inert gas and by-product to catalytic mixing object as condenser.
Another method of temperature in control fuel oil inerting system is carried out again to catalyst and heat exchanger assignment Arrangement.For example, turning now to the embodiment for turning now to Fig. 9, showing the inerting system 900 according to the disclosure.Inerting System 900 can be similar to the inerting system being shown and described above, and therefore may not show or beg for for the sake of simplicity By similar characteristics.Inerting system 900 uses the altered arrangement of catalytic reactor 922 and heat exchanger 932.In this implementation In scheme, cold air source 928 can be typical ram-air source arrangement.
As indicated, inerting system 900 includes fuel tank 902 wherein with fuel oil 904, wherein in fuel oil 904 in validity period Between pasta upper space 906 is formed when being consumed.As described above, fuel tank 902 is fluidly connected to by inerting supply line Evaporator vessel 910.It can be carried out by the operation of evaporator vessel valve and/or controller 944 and/or by controller 944 Control control the amount (that is, amount of inerting fuel oil 908) of the fuel oil 904 being extracted in evaporator vessel 910.It says at this In bright property embodiment, make the vaporization of inerting fuel oil 908 to generate the first reactant using heater 914.Second reactant source It is mixed from the second reactant source 920, and by the first reactant with the second reactant.First reactant of mixing is reacted with second Object reacts in catalytic reactor 922 is supplied to one or more fuel tanks (for example, fuel tank 902) to generate inert gas In.It is similar with above situation, can by make catalyzed gas by heat exchanger 932 come from wherein condensation of water steam.
However, in the present embodiment, be better than catalyst it is adjacent with heat exchanger allow described two components each other Cooling air is successively supplied, catalytic reactor 922 is arranged in the downstream of heat exchanger 932.Thus, come from cold air source The coldest air can be provided heat exchanger 932 by 928 cooling stream, and slightly warm air can be from heat exchanger 932 It exits into catalytic reactor 922 and realizes that the temperature in catalytic reactor 922 controls.In general, using punching press sky is passed through The catalyst of air cooling makes fuel tank inerting, and during operation of cruising, air mass flow needs are reduced significantly, so that from catalysis The temperature for the air that the cold side outlet port of agent comes out may be excessively high.It, can by the air-flow in punching press circuit in the arrangement shown in Fig. 9 To increase so that the exhaust (by after heat exchanger 932) of the cold side of catalytic reactor 922 can maintain 450 ℉ with Under.
Turning now to Figure 10, the embodiment that shows the inerting system 1000 according to the disclosure.Inerting system 1000 can be with Similar to the inerting system being shown and described above, and it therefore may not show or discuss for the sake of simplicity similar characteristics. In this embodiment, as with several arrangements in above-mentioned arrangement used in compared with typical case's bleed air source, inerting system 1000 use surrounding air as the second reactant source 1020.Pressurized air and oxygen can be supplied to inerting system 1000 by bleed In.However, the amount that bleed is reduced or removed in aircraft system may be advantageous, because such reduction may improve fuel oil It efficiency and/or reduces and in order to which bleed is supplied to fuel oil inerting system conduit is mounted on to the needs in aircraft.
As indicated, inerting system 1000 includes fuel tank 1002 wherein with fuel oil 1004, wherein making in fuel oil 1004 Pasta upper space 1006 is formed when being consumed with period.As described above, inerting supply line by fuel tank 1002 fluidly It is connected to evaporator vessel 1010.By the operation of evaporator vessel valve and/or controller 1044 and/or controller can be passed through 1044 controls carried out control the amount of the fuel oil 1004 that is extracted in evaporator vessel 1010 (that is, inerting fuel oil 1008 Amount).In this illustrative embodiment, make the vaporization of inerting fuel oil 1008 to generate the first reaction using heater 1014 Object.Second reactant source is from the second reactant source 1020, and in this embodiment, second reactant source is environment sky Gas.First reactant is mixed with the second reactant and is then reacted in catalytic reactor 1022 with generate inert gas so as to It is supplied in one or more fuel tanks (for example, fuel tank 1002).In the present embodiment, the second reactant source 1020 does not draw Gas, and it is derived from the surrounding air of aircraft exterior.In this arrangement, air blower or fan 1072 are arranged in the second reactant source In 1020 flowline or along the second reactant source 1020 flowline arrange, and surrounding air can be sucked it is logical The system is crossed, therefore removes the use to bleed.
Turning now to Figure 11, the arrangement of the inerting system 1100 of an embodiment according to the disclosure is shown.Inerting system System 1100 can be similar to the inerting system being shown and described above, and therefore may not show or discuss for the sake of simplicity Similar characteristics.In this embodiment, inerting system 1100 uses back pressure current limiter 1174, and the back pressure current limiter is located at It is positioned in the fuel tank supply line 1156 in 1122 downstream of catalytic reactor or along the fuel tank supply line.
As indicated, inerting system 1100 includes fuel tank 1102 wherein with fuel oil 1104, wherein making in fuel oil 1104 Pasta upper space 1106 is formed when being consumed with period.Inerting supply line 1154 fluidly connects fuel tank 1102 with by inerting Fuel oil and/or the first reactant are supplied to catalytic reactor 1122.As indicated, in this embodiment, fuel oil pump assembly 1168 (for example, similar with the fuel pump for showing and describing in Fig. 6 A to Fig. 6 B) are mounted in inerting supply line 1154 or edge Inerting supply line installation.Second reactant comes from the second reactant source 1120, wherein the first reactant and second is instead The mixture of object is answered to be supplied to catalytic reactor 1122 to be catalyzed.The operation of fuel oil pump assembly 1168 can pass through control Device 1144 controls.
In order to condense and remove vapor, minimum condenser temperature in heat exchanger 1132 is by a little higher than freezing point.For Condensation at atmosheric pressure, this temperature, which will will lead to, about 0.6% mole point in the saturation air-flow for leaving heat exchanger 1132 Several vapor, because in the H just at a temperature of above freezing2O saturation vapour pressure is about 0.6 kPa (and atmosphere Pressure is about 100 kPa).Because of H2O saturation vapour pressure only becomes (and not becoming with gross pressure) with temperature, thus compared with Under high gross pressure, the molar fraction of vapor becomes smaller, that is, the air-flow for leaving heat exchanger 1132 dries out.For example, 10 Under atm pressure (about 1000 kPa), the molar fraction for leaving the vapor in the saturation air-flow of heat exchanger 1132 will be about 0.06%.Therefore, in terms of making fuel system keep drying, the operation of elevated pressures is advantageous, because more dry air-flow will The pasta upper space 1106 being supplied in fuel tank 1102.In addition, catalytic reactor 1122 and heat exchanger 1132 are higher Size needed for operation will reduce these components under pressure, because working fluid (gas) will become more dense, and because The heat transfer rate of per unit surface area will increase with pressure and (increase with working fluid density and Reynolds number).
The embodiment of Figure 11 enables inerting system 1100 to operate under the pressure higher than the pressure in fuel tank 1102. Increased pressure can be enabled to reduce the required size of catalytic reactor 1122 and/or heat exchanger 1132 and also be provided More dry inert gas, the inert gas return to fuel tank 1102.In order to operate at elevated pressures, pass through fuel oil pump assembly Liquid fuel pumping from fuel tank 1102 is delivered to catalytic reactor 1122 to elevated pressures by 1168, and provides high pressure Second reactant source 1120 (such as from aircraft engine) is so that catalysis oxidation occurs for fuel oil.Equipped with back pressure current limiter 1174 To adjust the operating pressure of inerting system 1100, especially at catalytic reactor 1122 and heat exchanger 1132.Back pressure current limliting Device 1174 may be configured to actively control or can be passive valve by controller 1144.In some embodiments, such as It will be apparent to those skilled in the art that back pressure current limiter 1174 can be throttle valve, electronic control valve (for example, using the gas of feedback Dynamic control), the passive aperture in flowline or current limiter, mechanical valve or other types of current limiter.In some embodiments In, can in response to aircraft operating condition and control controlled back pressure current limiter.
Back pressure current limiter 1174 is arranged to the operation with high pressure for maintaining catalytic reactor 1122 and heat exchanger 1132.Pass through The increased pressure that back pressure current limiter 1174 provides makes it possible to more effectively remove water from inerting system 1100.As indicated, back Pressure current limiter 1174 is located at the downstream of catalytic reactor 1122 and heat exchanger 1132, and in this embodiment, in water The downstream of separator 1138, but in some embodiments, separator 1138 can be removed.In addition, including moisture From in some embodiments of device, counterbalance valve can be located at the downstream of catalytic reactor 1122 and heat exchanger 1132 but in water The upstream of separator 1138.
Turning now to Figure 12, the arrangement of the inerting system 1200 of an embodiment according to the disclosure is shown.Inerting system System 1200 can be similar to the inerting system being shown and described above, and therefore may not show or discuss for the sake of simplicity Similar characteristics.In this embodiment, inerting system 1200 uses inert gas recirculating system 1276, the inert gas Recirculating system is located in the fuel tank supply line 1256 in the downstream of catalytic reactor 1222 or along the fuel tank supply pipe Line positioning.As schematically shown in Figure 12, catalytic reactor 1222 has and other embodiment party shown and described herein The different form factor of case.For example, as indicated, catalytic reactor is simple single chip architecture.
As indicated, inerting system 1200 includes fuel tank 1202 wherein with fuel oil 1204, wherein making in fuel oil 1204 Pasta upper space 1206 is formed when being consumed with period.Inerting supply line 1254 fluidly connects fuel tank 1202 with by inerting Fuel oil and/or the first reactant are supplied to catalytic reactor 1222.As described above, first anti-in catalytic reactor 1222 Answering reacting between object and the second reactant (for example, air with fuel oil) that inert gas is made to return to fuel tank 1202 (has or does not have There are water condensation and removal).It is desirable that zero or least O will be had by returning to the air-flow of fuel tank 12022(make to maximize inerting With), the near-stoichiometric between the first reactant (for example, fuel oil) and the second reactant (for example, air) will be needed anti-in this way It answers.
Regrettably, reaction of fuel oil under the conditions of near-stoichiometric may result in significant heat release and catalysis reaction The overheat of device 1222.In some embodiments, such overheat in order to prevent, can cool down the production for leaving catalytic reactor 1222 A part of logistics and will be cold before the first reactant and the second reactant are reacted at catalytic reactor 1222 But part is mixed with first reactant and the second reactant.That is, in the upstream of catalytic reactor 1222, then follow The product stream of recycling can be supplied in the mixing of the first reactant and the second reactant by loop system 1276.In some implementations In scheme, the product of recycling can have composition identical with the gas for leaving catalytic reactor 1222.In other embodiment party In case, if condensed water and it is removed (separation) from existing gas first, supplied by recirculating system 1276 Recycled product can have different compositions.In addition, in some embodiments, if water is condensed and separates, water Catalytic reactor 1222 or anhydrous air-flow itself can be recycled to (for example, containing CO2And N2) catalysis can be recycled to Reactor 1222.
Although recirculating system 1276 as shown in Figure 12 is located at 1238 downstream of separator or later, in some realities It applies in scheme, separator can be located at the downstream of recirculating system.That is, in some embodiments, separator It can be placed in the pipeline for leading to fuel tank, but after the extraction of recirculation flow.It will be apparent to those skilled in the art that recycling The position of the extraction point of system can position anyway along the fluid line of system described herein.Such arrangement can To allow water to be recycled to catalyst (help catalyst cooling), and allow by the inert gas done (or dry hypoxemia Gas) be delivered to fuel tank pasta upper space before remove water.In addition, in some embodiments, no matter wherein from pipe Line removes water, and a part of extracted water can be added to recirculation flow (or being delivered directly to catalyst) to help to protect It is cold for holding catalyst.
Source or composition regardless of recycled product, it is catalytically anti-under the conditions of fuel oil and air are in near-stoichiometric At once it is achievable for operating catalytic reactor 1222 under safe temperature.For example, by making a part of product stream Cooling and recycling can be reduced and fuel oil temperature liter associated with the reaction of air with being used as diluent during reaction It is high.In addition, if it is desired, recycle product stream (for example, cold diluent) may be used as injection gas to deliver fuel vapor To catalyst.
For example, turning now to Figure 13, the cloth of the inerting system 1300 of an embodiment according to the disclosure is shown It sets.Inerting system 1300 can be similar to the inerting system being shown and described above, and therefore for the sake of simplicity may not Show or discuss similar characteristics.In this embodiment, inerting system 1300 uses inert gas recirculating system 1376, institute Inert gas recirculating system is stated to be located in the fuel tank supply line 1356 in the downstream of catalytic reactor 1322 or along described The positioning of fuel tank supply line, but the product stream of recycling can be supplied to evaporator vessel 1310.
As indicated, inerting system 1300 includes fuel tank 1302 wherein with fuel oil 1304, wherein making in fuel oil 1304 Pasta upper space 1306 is formed when being consumed with period.Fuel tank 1302 is fluidly connected to evaporation by inerting supply line 1354 Device container 1310 is supplied to catalytic reactor 1322 to generate inerting fuel oil and/or the first reactant.As described above, Reacting between the first reactant in catalytic reactor 1322 and the second reactant (for example, air with fuel oil) makes inert gas It returns fuel tank 1302 (with or without water condensation and removal).
Similar with embodiment shown in Figure 12, inerting system 1300 includes recirculating system 1376.In such case In, recirculating system 1376 makes a part for the product stream for leaving catalytic reactor 1322 deviate fuel tank supply line 1356.It will Extracted product is supplied in evaporator vessel 1310.Hold evaporator as indicated, return line 1378 can be arranged A part of fuel oil in device 1310 is circulated back to fuel tank 1302.In this embodiment, recycling gas will flow through recycling System 1376 simultaneously enters in evaporator vessel 1310 to execute injection.Thus, fuel vapor is grouped into be formed by recycling gas Injection gas, and spray gas/fuel vapor mixture and will then mix with air and be delivered to catalytic reactor 1322。
Although recirculation flow as shown in this article is directed into sprayer (that is, evaporator vessel 1310) entirely and passes through institute Sprayer is stated, but the present disclosure is not limited thereto.For example, in some non-limiting embodiments, guiding recirculation flow A part is by sprayer, and the rest part of recirculation flow is transmitted directly to catalyst (that is, around sprayer and straight It connects and is fed to catalyst 1322).That is, in some embodiments, two recirculation lines, the pipeline can be used Arrangement shown in Figure 12 to Figure 13 is combined.In such embodiment, by the small portion for only allowing recirculation flow Divide through sprayer, nebulizer flowrate can be adjusted as needed independently of recirculation flow rate.
In any embodiment shown in Figure 12 to Figure 13, recycle recycled product (for example, inert gas) To the entrance of catalytic reactor.The inert gas may be used as heat dump, and not react in catalytic reactor.Cause It will not react with catalytic reactor (that is, without chemical reaction) for recycled product, so flowing into and flowing through catalysis instead Heat will not be generated by answering this portion gas of device.Therefore, the fuel oil-gas mixture of the first and second reactants will be diluted, in this way The temperature that will therefore reduce in catalytic reactor.
In some embodiments, recirculating system 1276,1376 includes being arranged to that a part of product stream is forced to be returned Return to the pump or air blower of the upstream of corresponding catalytic reactor 1222,1322.In addition, one or more valves can be recycling The part of the volume for controlling the product of releasing from fuel tank supply line 1256,1356 of system 1276,1376.Some In embodiment, eductor pump or syringe pump can be positioned at the upstreams of catalytic reactor, and wherein flowline is connected to catalysis Product suction is returned to upstream position by the downstream of reactor, eductor pump or syringe pump.In some embodiments, drum Blower can be arranged in the downstream of catalytic reactor, wherein the air blower is arranged to a part of extraction product stream and by institute The a part for stating product stream is blown back into the upstream of catalytic reactor.In some embodiments, as described above, such as with supplied It should be compared to the amount in pasta upper space, controller can be arranged the amount of the product stream of control recycling.
Recirculating system provided herein, which can be arranged, follows any given or scheduled ratio or percentage again Ring.For example, in non-limiting example, for the every portion being supplied in pasta upper space, there may be 50 parts Reacting product stream can recycle.This is only example, and in some embodiments, up to 99% reaction product Stream can recycle, wherein only 1% being supplied in pasta upper space.In contrast, another side, extremely low percentage (such as 5% Or it is lower) reacting product stream can recycle, wherein 95% or more reacting product stream be supplied to pasta top sky Between in.
Turning now to Figure 14, the arrangement of the inerting system 1400 of an embodiment according to the disclosure is shown.Inerting system System 1400 can be similar to the inerting system being shown and described above, and therefore may not show or discuss for the sake of simplicity Similar characteristics.In this embodiment, inerting system 1400 uses fuel vaporization system 1480.1480 quilt of fuel vaporization system It is arranged to for fuel oil 1404 being transferred in container 1482 from fuel tanker 1402, the container, which is arranged to, executes injection.Pass through Container value 1412 come measure fuel oil 1404 enter container 1482 in amount.Air is introduced into from air-source 1484 in container 1482 Position below interior fuel liquid level.Air is introduced into the nozzle or frit that can be in fuel oil by being located in container 1482 1486 complete.Air will pass through fuel oil in the form of bubbles, and fuel vapor will be vaporized into bubble.Combined fuel oil and gas Bubble will be deposited in the vapor space above the fuel liquid level in container 1,482 1488, therefore form vapour in vapor space 1488 The fuel air mixture of change.In some embodiments, the air from air-source 1484 into container 1482 can be passed through Temperature is arranged and/or controls fuel air mixture by the design of nozzle or frit 1486.In vapor space 1488 Fuel air mixture can be subsequently used for catalytic reactor 1422 of feeding.In addition, as schematically shown, in some embodiment party In case, the portion of air from air-source 1484 can be guided to be introduced into (for example, injection) into catalytic reactor 1422 Before in the mixed downstream of vapor space 1488.In the downstream of catalytic reactor 1422, inerting system 1400 can substantially class It is similar to one or more of the embodiment above.
Advantageously, the embodiment of the disclosure is provided for generating inert gas and being supplied to such inert gas winged Effective mechanism in the fuel tank of machine.It is furthermore advantageous to which embodiment provided herein can prevent surrounding air from (may contain Have water) enter fuel tanker.Surrounding air enters fuel tanker, the controller of inerting system as described in this article in order to prevent Inert gas can be supplied to fuel tank to maintain wanted pressure (for example, providing the pressure higher than environmental pressure in fuel tank). Such increased pressure can be used in fuel tank to prevent the entrance of oxygen-enriched air (for example, surrounding air).In aircraft navigation Decline stage during in environmental pressure as height reduces when increasing, this may be particularly useful.
Clearly negate unless otherwise indicated herein or by context, otherwise term "one", " one ", " described " and Use of the similar reference in the context of description (especially in the context of following following claims) will be understood as covering list Several and plural number.Described value is included and has by upper and lower by the qualifier " about " and/or " about " being used in combination with quantity Text instruction meaning (such as comprising degree of error associated with certain amount of measured value).All models disclosed herein It encloses and endpoint is included, and the endpoint can be combined independently each other.
Although the present invention is described in detail only in conjunction with a limited number of embodiment, it should be readily understood that, this Invention is not limited to such disclosed embodiment.But the present invention can be modified to combine it is not described so far but with the present invention The consistent any number of variation of spirit and scope, change, substitution, combination, sub-portfolio or equivalent arrangements.In addition, though Various embodiments of the present invention are described, it will be understood that, aspect of the invention can only include in the embodiment It is some.
Therefore, the disclosure is not considered limited to description above, but is limited solely by scope of the appended claims.

Claims (15)

1. a kind of fuel tank inerting system for aircraft, the system comprises:
Fuel tank；
First reactant source, first reactant source are fluidly connected to the fuel tank, and first source is arranged to reception Fuel oil from the fuel tank；
Second reactant source；
Catalytic reactor, the catalytic reactor are arranged to the first reactant received from first source and come from described For second reactant in the second source to generate inert gas, the inert gas is supplied to the fuel tank to fill the fuel tank Pasta upper space；And
Back pressure current limiter, the back pressure current limiter be located in fuel tank supply line or along fuel tank supply line positioning and In the downstream of the catalytic reactor, the back pressure current limiter is arranged to the operation with high pressure for maintaining the catalytic reactor.
2. the system as claimed in claim 1, wherein first source is evaporator vessel.
3. system as claimed in any preceding claim, wherein second source is the gas vent and aircraft of the engine of aircraft At least one of cabin.
4. system as claimed in any preceding claim, the system also includes heat exchanger, the heat exchanger assignment exists Between the catalytic reactor and the fuel tank and it is configured to be cooled down and condensed from the defeated of the catalytic reactor At least one operation in out, inert gas and by-product is separated, it is preferable that wherein by the environment control from the aircraft The exhaust of system processed provides to the heat exchanger and enables to the cooling output from the catalytic reactor.
5. system as claimed in any preceding claim, the system also includes heating duct, the heating duct is thermally connected To the catalytic reactor and it is arranged to first source thermal communication to provide heat to first source to generate State the first reactant.
6. system as claimed in any preceding claim, the system also includes syringe pump, the syringe pump is arranged At receiving first reactant and second reactant and by the mixed of first reactant and second reactant It closes object and is supplied to the catalytic reactor.
7. system as claimed in any preceding claim, the system also includes inert gas recirculating system, the inertia Gas recirculation system is located at the downstream of the catalytic reactor and the upstream of the fuel tank, wherein the inert gas recycles System, which is arranged to, is directed to the catalytic reactor for a part of the inert gas.
8. system as claimed in any preceding claim, the system also includes at least one additional fuel tanks, wherein it is described extremely A few additional fuel tank, which is arranged to, receives the inert gas from the catalytic reactor.
9. system as claimed in any preceding claim, the system also includes be located at the catalytic reactor and the fuel tank Between and the separator in the catalytic reactor downstream, the separator be arranged to from reacted first reaction Object and the second reactant extract water.
10. a kind of method for the fuel tank that inert gas is supplied to aircraft, which comprises
Fuel from fuel tank is supplied to the first reactant source；
The first reactant is generated in first reactant source；
First reactant is mixed with the second reactant supplied from the second reactant source；
The first reactant and the second reactant of catalytic mixing are in catalytic reactor to generate inert gas；
The inert gas is supplied to the fuel tank to fill the pasta upper space of the fuel tank；And
The operation with high pressure of the catalytic reactor is maintained using back pressure current limiter, the back pressure current limiter is located at fuel tank supply pipe It is positioned in line or along the fuel tank supply line and in the downstream of the catalytic reactor.
11. method as claimed in claim 10, wherein at least one of described first source is evaporator vessel and/or described Second source is at least one of gas vent and aircraft cabin of the engine of aircraft.
12. the method as described in any one of claim 10 to 11, cold the method also includes being carried out by heat exchanger But described at least one operation in output of the condensation from the catalytic reactor to separate inert gas and by-product Heat exchanger assignment is between the catalytic reactor and the fuel tank, it is preferable that the method also includes coming from described fly The exhaust of the environmental control system of machine provides to the heat exchanger and enables to the cooling institute from the catalytic reactor State output.
13. the method as described in any one of claim 10 to 12, the method also includes by heating duct to heat The first reactant source is stated, the heating duct is thermally connected to the catalytic reactor and is arranged to be connected with first source heat It passes to and provides heat to first source to generate first reactant.
14. the method as described in any one of claim 10 to 13, the method also includes by first reactant and institute It states the mixing of the second reactant and is injected using syringe pump with by the mixing of first reactant and second reactant Object is supplied to the catalytic reactor.
15. the method as described in any one of claim 10 to 14, the method also includes making the one of the inert gas Recycling is simultaneously partly supplied to the catalytic reactor and using separator come from first reacted by point recycling Reactant and the second reactant extract in water at least one of operation, the separator be located at the catalytic reactor with it is described Between fuel tank and in the catalytic reactor downstream.
CN201910086744.2A 2018-01-29 2019-01-29 The fuel tank of aircraft is catalyzed inerting equipment Pending CN110092001A (en)

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US15/882,296 US20180148191A1 (en) 2016-08-03 2018-01-29 Catalytic fuel tank inerting apparatus for aircraft

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CN112960125B (en) * 2021-02-20 2023-06-23 南京航空航天大学 Aircraft cabin environment control and airborne nitrogen production coupling system

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