CN208036637U - Aircraft fuel tank oxygen concentration control device based on low temperature plasma - Google Patents

Aircraft fuel tank oxygen concentration control device based on low temperature plasma Download PDF

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Publication number
CN208036637U
CN208036637U CN201820087828.9U CN201820087828U CN208036637U CN 208036637 U CN208036637 U CN 208036637U CN 201820087828 U CN201820087828 U CN 201820087828U CN 208036637 U CN208036637 U CN 208036637U
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China
Prior art keywords
oxygen concentration
fuel tank
side channel
sensor
entrance
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Expired - Fee Related
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CN201820087828.9U
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Chinese (zh)
Inventor
彭孝天
冯诗愚
李超越
王晨臣
刘卫华
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Abstract

The utility model discloses a kind of aircraft fuel tank oxygen concentration control device based on low temperature plasma, belongs to air line technical field, concrete principle is:The mixed gas of aircraft fuel oil upper box part is extracted out by wind turbine, is adjusted through excess temperature, is passed through in reaction of low temperature plasma device, and hydrocarbon therein is excited by low-temperature plasma, dissociated, ionization ultimately generates harmless CO2And H2O.Nitrogen-rich gas is obtained after cooling drying, fuel tank is flowed back to and carries out gas-phase space oxygen concentration control.System has many advantages, such as that simple in structure, adaptation condition range is wide, control efficiency is high, conforms better to the developing direction of Fuel On Board case oxygen concentration control system.

Description

Aircraft fuel tank oxygen concentration control device based on low temperature plasma
Technical field
The utility model is related to air line technical fields, are related to airborne tank oxygen concentration control system more particularly to one Aircraft fuel tank oxygen concentration control device of the kind based on low temperature plasma.
Background technology
The safety problem of modern aircraft is all the time by the extensive concern of society, and fuel system burning, explosion are to draw One of the main reason for playing aviation accident.There is data to suggest that in Vietnam War, United States Air Force is damaged by ground fire attack Thousands of airplanes are lost, wherein since fuel tanker explosion on fire causes the ratio of fatal crass to be as high as 50%.Cabin security study Technology group(cabin safety research technical group,GSRTG)To 1966 to 2009 whole world 3726 civil aircraft accident statistics are the results show that share 370 accidents related with fuel tank combustion explosion.It can be seen that, it is necessary to it uses Effective measures prevent the aircraft fuel tank from firing.
Aircraft fuel tank upper space is full of flammable gas mixture, and inflammable, explosive feature seriously threatens aircraft Safety, it is necessary to adopt an effective measure to reduce the probability of its combustion, outburst life, and reduce its extent of injury.System is protected in fuel tank In, fuel tank explosion on fire can be prevented by reducing fuel tank upper gaseous phase space oxygen concentration, ensure passenger and aircraft safety.Reduce fuel oil Case oxygen concentration can be used the gases such as inert gas such as nitrogen and carbon dioxide and carry out fuel tank inerting, and so that its oxygen content is reduced to can Fire the limit or less.
Common aircraft fuel tank oxygen concentration control technology mainly have liquid nitrogen inerting technology, 1301 inerting technologies of Halon, Sieve technology, membrane separation technique etc..Wherein hollow-fibre membrane produces the airborne nitrogen inerting technology processed of nitrogen-rich gas(On-Board Inert Gas Generator System, OBIGGS)It is that most economical, practical fuel tanker fires suppression technology.But OBIGGS technologies such as detach that membrane efficiency is low to lead to that aircraft panelty is big, seperation film entrance demand pressure there are still many problems Height causes not using on many types(Such as helicopter), tiny film wire and infiltration aperture gradually block and air source in ozone Cause causes fuel-steam to leak when serious film properties decaying, nitrogen-rich gas filling fuel tank pollutes environment etc..
In recent years, non-thermal plasma trap is quickly grown in processing exhaust gas and rubbish etc., plasma and VOCs's The mechanism of action mainly has two aspects:First, the high energy electron of tens thousand of degree is directly and gas molecule(Atom)Inelastic collision occurs, Convert the energy into ground state molecule(Atom)Interior energy, make its excitation, dissociation, ionization ultimately generate harmless CO2 And H2O; Second is that the O in high energy electron energized gas2、N2、H2O equimoleculars have Strong oxdiative ability O, OH, O to generate3, etc. from By base or active particle, they destroy the chemical bonds such as C-H, C=C or C-C, make the hairs such as H, C1, F in VOCs molecules Raw displacement reaction and decomposition oxidation, ultimately generate innocuous substance CO2And H2O.The utility model can be incited somebody to action using low-temperature plasma The fuel-steam catalysis of fuel oil upper box part generates CO2And H2O.Reaction gas is nitrogen-rich gas after being dried, and flows back to fuel tank progress Inerting controls the oxygen concentration of fuel tank gas-phase space.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of base for defect involved in background technology In the aircraft fuel tank oxygen concentration control device of low temperature plasma.
The utility model uses following technical scheme to solve above-mentioned technical problem:
Aircraft fuel tank oxygen concentration control device based on low temperature plasma, including fuel tank, the first spark arrester, wind Machine, the first electric control valve, preheater, electric heater, the first temperature sensor, the first oxygen concentration sensor, the first hydrocarbonization Object sensor, reaction of low temperature plasma device, the second hydrocarbon sensor, the second oxygen concentration sensor, aqueous slkali is closed to inhale Receive device, primary cooler, primary separator, secondary cooling device, secondary separator, water jet, second temperature sensor, the Two electric control valves, one way stop peturn valve, the second spark arrester, third oxygen concentration sensor and automatic controller;
The fuel tank includes gas vent and gas access;The water jet goes out comprising first to third entrance and one Mouthful;The automatic controller includes current input terminal and current output terminal;
The gas vent of the fuel tank, the first spark arrester, wind turbine entrance be sequentially connected by pipeline;
Entrance of the outlet of the wind turbine respectively with the outlet of first electric control valve, preheater cold side channel passes through Pipeline is connected;
The entrance of first electric control valve is connected by pipeline with external ram-air;
The outlet of the preheater cold side channel, electric heater, the first temperature sensor, the first oxygen concentration sensor, One hydrocarbon sensor, reaction of low temperature plasma device, the second hydrocarbon sensor, the second oxygen concentration sensor, The hot-side channel of aqueous slkali absorber, the hot-side channel of primary cooler, primary separator, the hot side of secondary cooling device are logical The gas in road, secondary separator, second temperature sensor, the second electric control valve, one way stop peturn valve, the second spark arrester, fuel tank Body entrance is sequentially connected by pipeline;
The probe of third oxygen concentration sensor stretches into the fuel tank, the concentration for incuding oxygen in the fuel tank, and Pass it to the automatic controller;
The entrance of the aqueous slkali absorber cold side channel, the entrance of primary cooler cold side channel, the water jet Third entrance is connected by pipeline with outside cooling with ram-air;
The outlet of the aqueous slkali absorber cold side channel, the outlet of primary cooler cold side channel respectively by pipeline and The entrance of the preheater cold side channel connects;
The outlet of the preheater cold side channel is connected by pipeline with the external world;
The first entrance of the water jet is connected with the liquid outlet of the primary separator by pipeline, water jet Second entrance is connected with the liquid outlet of secondary separator by pipeline, the outlet of water jet and the secondary cooling device cold side The entrance in channel is connected by pipeline;
The outlet of the secondary cooling device cold side channel is connected by pipeline with the external world;
The current input terminal of the automatic controller respectively with the third oxygen concentration sensor, the first temperature sensor, First oxygen concentration sensor, the first hydrocarbon sensor, the second hydrocarbon sensor, the second oxygen concentration sensor, Second temperature sensor is electrically connected, current output terminal respectively with first electric control valve, the second electric control valve, wind Mechanical, electrical heater, reaction of low temperature plasma device are electrically connected.
The utility model has the following technical effects using above technical scheme is compared with the prior art:
1, technology is high-end, concise in technology:It after booting, i.e., voluntarily operates, is limited by operating mode considerably less;
2, energy saving:Without mechanical equipment, air drag is small, and power consumption is about 0.003kw/m3 exhaust gas;
3, it is wide to adapt to condition range:Equipment starts, stopping is very rapid, with with opening, is not influenced by temperature.? It 250 DEG C or less and can run well in mist state work condition environment.It still can normally be transported in -50 DEG C to+50 DEG C of environment temperatures Turn;
4, simple in structure:Electricity consumption is only needed, operation is extremely simple, and no mechanical equipment, failure rate is low, and repair is easy.
Description of the drawings
Fig. 1 is the aircraft fuel tank oxygen concentration control device schematic diagram based on low temperature plasma.
In figure, 1- fuel tanks, the first spark arresters of 2-, 3- wind turbines, the first electric control valves of 4-, 5- preheaters, 6- electric heaters, The first temperature sensors of 7-, the first oxygen concentration sensors of 8-, the first hydrocarbon sensors of 9-, 10- low temperature plasmas are anti- Answer device, the second hydrocarbon sensors of 11-, the second oxygen concentration sensors of 12-, 13- aqueous slkali absorbers, 14- primary coolings Device, 15- primary separators, 16- secondary cooling devices, 17- grade separator, 18- water jets, 19- second temperature sensors, The second electric control valves of 20-, 21- one way stop peturn valves, the second spark arresters of 22-, 23- third oxygen concentration sensors, 24- are automatically controlled Device.
Specific implementation mode
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings:
The utility model can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein. On the contrary, thesing embodiments are provided so that the disclosure is thorough and complete, and this reality will be given full expression to those skilled in the art With novel range.In the accompanying drawings, for the sake of clarity it is exaggerated component.
It will be appreciated that though term first, second, third, etc., which may be used herein, describes each element, component and/or portion Point, but these elements, component and/or part should not be limited by these terms.These terms be used only for by element, component and/or Part mutually distinguishes.Therefore, first element discussed below, component and/or part are imparted knowledge to students without departing substantially from the utility model Under the premise of can become second element, component or part.
As shown in Figure 1, the aircraft fuel tank oxygen concentration control device based on low temperature plasma.The outlet of fuel tank 1 passes through Pipeline is connected with the first spark arrester 2,3 entrance of wind turbine in turn;The ram-air passes through 4 entrance of pipeline and the first electric control valve Connection;The wind turbine 3 export with first electric control valve 4 outlet by pipeline simultaneously with 5 cold side channel entrance of preheater Connection;The outlet of 5 cold side channel of the preheater is connected with electrical heating 6, the first temperature sensor 7, the first oxygen in turn by pipeline Concentration sensor 8, the first hydrocarbon sensor 9, reaction of low temperature plasma device 10, the second hydrocarbon sensor 11, the second oxygen concentration sensor 12,13 hot-side channel entrance of aqueous slkali absorber, 13 hot-side channel of aqueous slkali absorber go out Mouthful by pipeline be connected in turn 14 hot-side channel of primary cooler, primary separator 15,16 hot-side channel of secondary cooling device, Secondary separator 17, second temperature sensor 19, the second electric control valve 20, one way stop peturn valve 21, the second spark arrester 22, institute State 1 entrance of fuel tank;Third oxygen concentration sensor 23 is connect by popping one's head in the fuel tank 1.The cooling is shared with ram-air Three strands, one is connect by pipeline with 13 cold side channel entrance of the aqueous slkali absorber;Secondly stock by pipeline with it is described 14 cold side channel entrance of primary cooler connects;13 cold side channel of the aqueous slkali absorber outlet and the primary cooler 14 Cold side channel outlet is connect with 5 cold side channel entrance of the preheater simultaneously by pipeline;5 cold side channel of the preheater exports It is drained into outside machine by pipeline.For water jet 18 there are three entrance and one outlet, 15 liquid outlet of the primary separator is logical Piping is connect with 18 one entrance of the water jet;Secondary 17 liquid outlet of separator passes through pipeline and the water spray Device 18 is secondly entrance connects;It is described it is cooling with its three strands of ram-air by pipeline with the water jet 18 thirdly entrance is connect; The outlet of the water jet 18 is connect by pipeline with 16 cold side channel entrance of the secondary cooling device;The secondary cooling device 16 is cold Wing passage outlet is drained by pipeline outside machine.
The third oxygen concentration sensor 23, the first temperature sensor 7, the first oxygen concentration sensor 8, the first nytron Object sensor 9, the second oxygen concentration sensor 12, second temperature sensor 19, passes through cable at second hydrocarbon sensor 11 Parallel connection is simultaneously connect with 24 current input terminal of automatic controller;24 current output terminal of the automatic controller by cable respectively with institute State the electric current of the first electric control valve 4, the second electric control valve 20, wind turbine 3, electric heater 6, reaction of low temperature plasma device 10 Input terminal connects.
Specifically, the aircraft fuel tank oxygen concentration control device course of work based on low temperature plasma is as follows:
1)Inerting process:The gas on 1 top of the fuel tank flows through first resistance under the swabbing action of the wind turbine 3 Firearm 2, the wind turbine 3;It is mixed with the ram-air for flowing through first electric control valve 4;Mixed gas is in the preheater 5 In be preheated;Then it is further heated in the electric heater 6 to reaction required temperature;High-temperature gas is followed by described First temperature sensor 7, the first oxygen concentration sensor 8, the first hydrocarbon sensor 9;It is anti-in the low temperature plasma It answers in device 10 by low-temperature plasma excitation, dissociation, ionization;Gas after reaction is mainly nitrogen, carbon dioxide, water and nitrogen oxygen Compound;High temperature and humidity gas flows successively through second hydrocarbon sensor 11, the second oxygen concentration sensor 12;Described Nitrogen oxides and carbon dioxide are absorbed in aqueous slkali absorber 13;The air that is stamped in the primary cooler 14 is tentatively cold But;Elutriation is gone out in the primary separator 15;It is further cooled down in the secondary cooling device 16;In the secondary water Water is further precipitated in separator 17;It is electronic followed by the second temperature sensor 19, second to obtain the air of low temperature drying Regulating valve 20, one way stop peturn valve 21, the second spark arrester 22;It finally flows back to fuel tank and is rinsed inerting.
2)Cooling procedure:The cooling is divided into three strands with ram-air, one passes through the aqueous slkali absorber 13 Cold side gas exchanges heat;Secondly stock is exchanged heat by 13 cold side gas passage of the primary cooler;After two bursts of heatings 5 hot-side channel of the preheater is flowed through after ram-air mixing, preheats for reaction gas, is finally discharged to the outside.The cooling It is mixed with the liquid water from primary separator 15, secondary separator 17 in the water jet 18 with its three strands of ram-air It closes, is that gas cools down after reacting by 16 cold side channel of secondary cooling device.
3)Data collection and control process:
The third oxygen concentration sensor 23 detects fuel tank top oxygen concentration and transfers signals to the automatic controller 24;When oxygen concentration is more than given value, the controller 24 exports control signal to the wind turbine 3, turns on;According to described Gas temperature that first temperature sensor 7 detects controls the heating frequency of the electric heater 6;It is dense according to first oxygen Spend sensor 8, the first hydrocarbon sensor 9, the second hydrocarbon sensor 11, the detection of the second oxygen concentration sensor 12 To reaction before and after gas oxygen concentration and hydrocarbon concentration control the aperture of first electric control valve 4 and described The power of reaction of low temperature plasma device 10, to improve inerting efficiency.Pass through 19 probe gas body temperature of the second temperature sensor It spends and transfers signals to the automatic controller 24;When temperature is more than given value, the output control signal of the controller 24 To second electric control valve 20, make its closing, to ensure fuel tank safety.
Those skilled in the art of the present technique are it is understood that unless otherwise defined, all terms used herein(Including skill Art term and scientific terminology)With meaning identical with the general understanding of the those of ordinary skill in the utility model fields Justice.It should also be understood that those terms such as defined in the general dictionary should be understood that with upper with the prior art The consistent meaning of meaning hereinafter, and unless defined as here, will not with the meaning of idealization or too formal come It explains.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect carried out into One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done, It should be included within the scope of protection of this utility model.

Claims (1)

1. the aircraft fuel tank oxygen concentration control device based on low temperature plasma, which is characterized in that include fuel tank(1), One spark arrester(2), wind turbine(3), the first electric control valve(4), preheater(5), electric heater(6), the first temperature sensor (7), the first oxygen concentration sensor(8), the first hydrocarbon sensor(9), reaction of low temperature plasma device(10), the second carbon Hydrogen compound sensor(11), the second oxygen concentration sensor(12), aqueous slkali absorber(13), primary cooler(14), it is primary Separator(15), secondary cooling device(16), secondary separator(17), water jet(18), second temperature sensor(19), Two electric control valves(20), one way stop peturn valve(21), the second spark arrester(22), third oxygen concentration sensor(23)With automatically control Device(24);
The fuel tank(1)Including gas vent and gas access;The water jet(18)Including first to third entrance and one Outlet;The automatic controller(24)Including current input terminal and current output terminal;
The fuel tank(1)Gas vent, the first spark arrester(2), wind turbine(3)Entrance be sequentially connected by pipeline;
The wind turbine(3)Outlet respectively with first electric control valve(4)Outlet, preheater(5)Cold side channel enters Mouth is connected by pipeline;
First electric control valve(4)Entrance be connected with external ram-air by pipeline;
The preheater(5)The outlet of cold side channel, electric heater(6), the first temperature sensor(7), the first oxygen concentration sensing Device(8), the first hydrocarbon sensor(9), reaction of low temperature plasma device(10), the second hydrocarbon sensor (11), the second oxygen concentration sensor(12), aqueous slkali absorber(13)Hot-side channel, primary cooler(14)Hot side it is logical Road, primary separator(15), secondary cooling device(16)Hot-side channel, secondary separator(17), second temperature sensor (19), the second electric control valve(20), one way stop peturn valve(21), the second spark arrester(22), fuel tank(1)Gas access pass through pipe Road is sequentially connected;
Third oxygen concentration sensor(23)Probe stretch into the fuel tank(1)It is interior, for incuding the fuel tank(1)Interior oxygen it is dense Degree, and pass it to the automatic controller(24);
The aqueous slkali absorber(13)Entrance, the primary cooler of cold side channel(14)The entrance of cold side channel, the water spray Device(18)Third entrance by pipeline with outside is cooling is connected with ram-air;
The aqueous slkali absorber(13)The outlet of cold side channel, primary cooler(14)The outlet of cold side channel passes through pipe respectively Road and the preheater(5)The entrance of cold side channel connects;
The preheater(5)The outlet of cold side channel is connected by pipeline with the external world;
The water jet(18)First entrance and the primary separator(15)Liquid outlet by pipeline be connected, water spray Device(18)Second entrance and secondary separator(17)Liquid outlet by pipeline be connected, water jet(18)Outlet and institute State secondary cooling device(16)The entrance of cold side channel is connected by pipeline;
The secondary cooling device(16)The outlet of cold side channel is connected by pipeline with the external world;
The automatic controller(24)Current input terminal respectively with the third oxygen concentration sensor(23), the first temperature sensing Device(7), the first oxygen concentration sensor(8), the first hydrocarbon sensor(9), the second hydrocarbon sensor(11), Two oxygen concentration sensors(12), second temperature sensor(19)Be electrically connected, current output terminal respectively with first electric adjustable Save valve(4), the second electric control valve(20), wind turbine(3), electric heater(6), reaction of low temperature plasma device(10)Electrical phase Even.
CN201820087828.9U 2018-01-18 2018-01-18 Aircraft fuel tank oxygen concentration control device based on low temperature plasma Expired - Fee Related CN208036637U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108177786A (en) * 2018-01-18 2018-06-19 南京航空航天大学 Aircraft fuel tank oxygen concentration control device based on low temperature plasma
CN114313279A (en) * 2021-12-28 2022-04-12 中国航空工业集团公司金城南京机电液压工程研究中心 Catalytic inerting system with bypass branch control and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108177786A (en) * 2018-01-18 2018-06-19 南京航空航天大学 Aircraft fuel tank oxygen concentration control device based on low temperature plasma
CN108177786B (en) * 2018-01-18 2023-09-26 南京航空航天大学 Aircraft fuel tank oxygen concentration control device based on low-temperature plasma
CN114313279A (en) * 2021-12-28 2022-04-12 中国航空工业集团公司金城南京机电液压工程研究中心 Catalytic inerting system with bypass branch control and control method

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Granted publication date: 20181102

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