CN114718768A - High-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system and method - Google Patents
High-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system and method Download PDFInfo
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- CN114718768A CN114718768A CN202210350679.1A CN202210350679A CN114718768A CN 114718768 A CN114718768 A CN 114718768A CN 202210350679 A CN202210350679 A CN 202210350679A CN 114718768 A CN114718768 A CN 114718768A
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- unsymmetrical dimethylhydrazine
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- 239000007789 gas Substances 0.000 title claims abstract description 131
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000001301 oxygen Substances 0.000 title claims abstract description 72
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 26
- RHUYHJGZWVXEHW-UHFFFAOYSA-N 1,1-Dimethyhydrazine Chemical compound CN(C)N RHUYHJGZWVXEHW-UHFFFAOYSA-N 0.000 claims abstract description 146
- 239000000498 cooling water Substances 0.000 claims abstract description 106
- 238000002347 injection Methods 0.000 claims abstract description 69
- 239000007924 injection Substances 0.000 claims abstract description 69
- 239000002737 fuel gas Substances 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000000446 fuel Substances 0.000 claims description 57
- 239000007800 oxidant agent Substances 0.000 claims description 56
- 230000001590 oxidative effect Effects 0.000 claims description 44
- 238000002485 combustion reaction Methods 0.000 claims description 28
- 238000007664 blowing Methods 0.000 claims description 20
- 239000011229 interlayer Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 4
- 239000010763 heavy fuel oil Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 54
- 230000006378 damage Effects 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/96—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to a high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system and method, which are used for solving the problems that nitrogen oxides contained in oxygen-enriched gas generated under the test condition of a gas generator have personal harm and environmental pollution, and the conventional treatment method for nitrogen oxides is not suitable for the test of a gas generator scale piece. The system comprises an unsymmetrical dimethylhydrazine supply system, a afterburning system connected with the unsymmetrical dimethylhydrazine supply system, a fuel gas diversion system and a cooling water supply system; the afterburning system comprises an afterburning communicating pipe, an unsymmetrical dimethylhydrazine liquid collecting ring pipe communicated with the afterburning communicating pipe and a plurality of injection pipes which are uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe in the circumferential direction, wherein the injection pipes are provided with a plurality of injection units. The method comprises 1, opening a cooling water supply system; 2. starting a gas generator scale reducing component, and reacting the oxygen-enriched gas with unsymmetrical dimethylhydrazine; 3. when the work of the gas generator reducing rule piece is finished, a closing procedure is carried out.
Description
Technical Field
The invention relates to an oxygen-enriched gas treatment method for a gas generator of a afterburning engine, in particular to a high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system and a method.
Background
The normal temperature propellant high pressure afterburning engine comprises a fuel gas generator and an afterburning thrust chamber, and adopts the propellant combination of nitrogen oxide and hydrazine fuel. The fuel gas generator is an oxygen-enriched pre-combustion chamber, and the generated oxygen-enriched fuel gas and the fuel in the afterburning thrust chamber are subjected to secondary combustion; the gas generator needs to develop a reduced-size ignition test before a full-size engine is developed. The mixing ratio of the gas generator scale component is 19 under rated working condition, the gas temperature at the outlet of the spray pipe is about 1200K, the pressure is about 11MPa, the flow speed is about 600m/s, and the gas flow density can reach 9500 kg/s.m2. The fuel gas generated in the test process of the fuel gas generator contains a large amount of fuel gasNitrogen oxides, nitrogen oxides flow about 15.8 kg/s. Therefore, during the ignition test of the gas generator scale member, the gas rich in nitrogen oxides must be treated so as to reduce the harm of the nitrogen oxides in the gas to the bodies of testers and the pollution to the environment of a test area.
The nitrogen oxide treatment method widely applied to engineering at present comprises a catalytic combustion method, an adsorption method, a freezing method, a washing method and the like. However, the oxygen-enriched gas has the characteristics of high temperature, high pressure, high flow velocity, high flow density and the like in the test process of the gas generator scale component, and the existing nitrogen oxide treatment device cannot be matched with the working condition of the test process of the gas generator scale component. In order to match the working environment of high temperature, high pressure, high speed and large flow density during the test of the gas generator scale component, a new device and a new method are needed to be adopted for treating nitrogen oxides in oxygen-enriched gas.
Disclosure of Invention
The invention aims to solve the problems that nitrogen oxides contained in oxygen-enriched gas generated under the test condition of a gas generator have personal harm and environmental pollution, and the conventional treatment method for the nitrogen oxides is not suitable for the test of a scale piece of the gas generator, and provides a high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system and method.
The technical scheme provided by the invention is as follows:
a high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system is characterized in that:
comprises a gas generator scale component for generating oxygen-enriched gas, an unsymmetrical dimethylhydrazine supply system, a afterburning system connected with the unsymmetrical dimethylhydrazine supply system, a gas diversion system and a cooling water supply system;
the unsymmetrical dimethylhydrazine supply system is used for supplying unsymmetrical dimethylhydrazine to the afterburning system;
the afterburning system comprises an afterburning communicating pipe, a unsymmetrical dimethylhydrazine liquid collecting ring pipe communicated with the afterburning communicating pipe and a plurality of radial injection pipes which are uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe in the circumferential direction, wherein the first ends of the injection pipes are communicated with and hermetically connected with the unsymmetrical dimethylhydrazine liquid collecting ring pipe; the injection tube is provided with a plurality of injection units;
the jetting units are a plurality of groups of two-strand self-impact jetting units;
the two-strand self-impact type injection unit comprises two nozzles arranged on an injection pipe, the distance between the two nozzles is 25-35mm, and the length-diameter ratio of the nozzles is Linj/Dinj2.4 to 3.0, wherein LinjIs the length in the direction of extension of the nozzle, DinjIs the diameter of the nozzle; the self-attack angle of the nozzles in the two-strand self-attack type injection unit is 45-60 degrees;
the gas diversion system comprises an inner cylinder and an outer cylinder, the inner cylinder comprises an upper port and a lower port, the upper port is used for receiving oxygen-enriched gas generated by a gas generator scale component, and the lower port is used for transmitting the oxygen-enriched gas to the afterburning system;
and the cooling water supply system is used for cooling the afterburning system and the gas diversion system.
Further, the nozzle is arranged at the lower end of the pipe wall of the injection pipe, and the injection direction of the nozzle is downward; the nozzle adopts a single-component liquid direct-flow nozzle.
Furthermore, the first end of the injection pipe is detachably connected with the unsymmetrical dimethylhydrazine liquid collecting ring pipe through threads;
the connection position of the injection tube and the unsymmetrical dimethylhydrazine liquid collecting ring tube is sealed in a line sealing mode;
and the end surface of the second end of the injection pipe is provided with an injection hole, and the diameter of the injection hole is 0.8-1.0 mm.
Further, the gas diversion system also comprises an interlayer water cooling system;
the interlayer water cooling system comprises a closed interlayer cavity formed between the inner barrel and the outer barrel, a cooling liquid inlet located on the side wall of the lower end of the outer barrel and communicated with the interlayer cavity, and a cooling liquid outlet located on the side wall of the upper end of the outer barrel and communicated with the interlayer cavity.
Further, the unsymmetrical dimethylhydrazine supply system comprises an unsymmetrical dimethylhydrazine storage tank, a regulating valve assembly arranged on the unsymmetrical dimethylhydrazine storage tank and a unsymmetrical dimethylhydrazine manual main supply valve connected to the outlet end of the unsymmetrical dimethylhydrazine storage tank; along the unsymmetrical dimethylhydrazine transmission direction, an unsymmetrical dimethylhydrazine manual main supply valve is sequentially connected with an unsymmetrical dimethylhydrazine pneumatic main supply valve and an unsymmetrical dimethylhydrazine primary valve, and the unsymmetrical dimethylhydrazine primary valve is connected with an afterburning communicating pipe of an afterburning system;
further, the regulating valve assembly comprises a unsymmetrical dimethylhydrazine deflation valve, a unsymmetrical dimethylhydrazine pressurization valve and a safety valve;
the unsymmetrical dimethylhydrazine gas release valve comprises a unsymmetrical dimethylhydrazine pneumatic gas release valve and a unsymmetrical dimethylhydrazine manual gas release valve;
and an unsymmetrical dimethylhydrazine filter and an unsymmetrical dimethylhydrazine mass flowmeter are arranged between the unsymmetrical dimethylhydrazine manual main supply valve and the unsymmetrical dimethylhydrazine pneumatic main supply valve.
Furthermore, the afterburning system also comprises a blowing-off system, wherein the blowing-off system comprises a one-way valve and a unsymmetrical dimethylhydrazine pneumatic blowing-off valve, the one-way valve can be communicated with the communicating pipe, and the unsymmetrical dimethylhydrazine pneumatic blowing-off valve is connected with the one-way valve; the afterburning communicating pipe is provided with an unsymmetrical dimethylhydrazine pressure sensor;
the cooling water supply system comprises a cooling water tank, a manual cooling water main supply valve, a cooling water booster pump, a pneumatic cooling water main supply valve and a cooling water spraying device extending into the inner cylinder of the gas diversion system, which are sequentially connected through a cooling water pipeline; and a cooling water return valve is also connected to a cooling water pipeline between the cooling water booster pump and the cooling water pneumatic main supply valve, and the cooling water return valve is communicated with the cooling water tank and used for forming a return passage.
Further, the opening cavity of the cooling water pneumatic main supply valve is communicated with the closing cavity of the cooling water return valve, and the closing cavity of the cooling water pneumatic main supply valve is communicated with the opening cavity of the cooling water return valve.
Further, the gas generator scale member comprises a combustion chamber, a fuel circuit supply system and an oxidant circuit supply system;
the fuel path supply system comprises a fuel path product valve communicated with the combustion chamber, a fuel path primary valve connected with one input end of the fuel path product valve and a fuel path blow-off valve connected with the other input end of the fuel path product valve; the fuel path primary valve is connected with the fuel supply assembly, and the fuel path blow-off valve is connected with the fuel path blow-off system;
the oxidant path supply system comprises an oxidant path product valve communicated with the combustion chamber, an oxidant path primary valve connected with one input end of the oxidant path product valve, and an oxidant path blow-off valve connected with the other input end of the oxidant path product valve; the primary valve of the oxidant path is connected with the oxidant supply assembly, and the blowing valve of the oxidant path is connected with the blowing system of the oxidant path.
Meanwhile, the invention also provides a high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment method which is characterized by comprising the following steps:
s1, opening an unsymmetrical dimethylhydrazine pressure increasing valve, an unsymmetrical dimethylhydrazine manual main supply valve, an unsymmetrical dimethylhydrazine pneumatic main supply valve, a cooling water manual main supply valve and a cooling water pneumatic main supply valve;
s2, starting a fuel gas generator reducing rule piece, enabling oxygen-enriched fuel gas discharged by the fuel gas generator reducing rule piece to enter an inner cylinder of a fuel gas diversion system, cooling the fuel gas by an interlayer water cooling system and a cooling water spraying device, discharging the oxygen-enriched fuel gas to a afterburning system from the lower end of the inner cylinder, starting an unsymmetrical dimethylhydrazine primary valve, and enabling the oxygen-enriched fuel gas to react with the unsymmetrical dimethylhydrazine;
s3, when the work of the gas generator scale reducing piece is finished, opening a fuel path blow-off valve, then closing a primary valve of the fuel path, and blowing off residual fuel in a pipeline behind a product valve of the fuel path to a combustion chamber of the gas generator scale reducing piece by a fuel path blow-off system through the fuel path blow-off valve;
s4, when the chamber pressure in the combustion chamber of the gas generator contraction ruler piece is reduced to 50% of the rated chamber pressure, the primary valve of the oxidant path and the primary unsymmetrical dimethylhydrazine valve are closed, the pneumatic unsymmetrical dimethylhydrazine blowing valve is opened, and unsymmetrical dimethylhydrazine in the pipeline behind the primary unsymmetrical dimethylhydrazine valve is blown to the afterburning system;
s5, when the chamber pressure in the combustion chamber of the gas generator reducing rule piece is reduced to 10% of the rated chamber pressure, closing the fuel path blow-off valve, opening the oxidant path blow-off valve, blowing the residual oxidant in the pipeline behind the oxidant path primary valve to the afterburning system through the gas diversion system by the oxidant path blow-off system, and reacting with the residual unsymmetrical dimethylhydrazine in the pipeline behind the unsymmetrical dimethylhydrazine primary valve;
s6, no oxygen-enriched fuel gas is sprayed out from a fuel gas outlet of the fuel gas generator scale component, the oxidant path blow-off valve and the cooling water pneumatic main supply valve are closed, the cooling water return valve is opened at the same time, and the cooling water system continues to circulate;
s7, closing the unsymmetrical dimethylhydrazine pneumatic blow-off valve, stopping the oxygen-enriched fuel gas afterburning combustion reaction in the afterburning system, and closing the manual main cooling water supply valve.
The invention has the beneficial effects that:
1. the oxygen-enriched fuel gas treatment system adopts unsymmetrical dimethylhydrazine as afterburning fuel, has the advantages that the unsymmetrical dimethylhydrazine can spontaneously combust after meeting nitrogen oxides, and effectively avoids the problem of catalyst poisoning in a catalytic combustion method.
2. The oxygen-enriched fuel gas treatment system is provided with the fuel gas guiding device, and has the advantages that the fuel gas guiding device can rectify the oxygen-enriched fuel gas, so that secondary combustion can be stably carried out.
3. The oxygen-enriched gas treatment system adopts two modes of interlayer water cooling of the gas diversion system and water film cooling of the cooling water supply system, can effectively reduce the thermal stress of the gas diversion device and the afterburning device, and effectively improves the structural reliability of the gas diversion device in a high-temperature environment.
4. The secondary combustion in the afterburning device of the oxygen-enriched gas treatment method is still oxygen-enriched combustion, and the method has the advantages that unsymmetrical dimethylhydrazine can be fully combusted in the oxygen-enriched gas, secondary pollution possibly caused by the unsymmetrical dimethylhydrazine is effectively avoided, and meanwhile, the unsymmetrical dimethylhydrazine provided by a unsymmetrical dimethylhydrazine supply system reacts with the oxygen-enriched gas, so that the content of nitrogen oxides in the high-temperature, high-pressure, high-speed and large-flow-density oxygen-enriched gas generated during a scale spare test of a gas generator can be effectively reduced.
Drawings
FIG. 1 is a schematic view of an embodiment of a high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to the present invention;
FIG. 2 is a schematic structural view of a unsymmetrical dimethylhydrazine liquid collecting ring pipe and an injection pipe in the embodiment of the invention;
FIG. 3 is a schematic view of an injector tube configuration according to an embodiment of the present invention;
FIG. 4 is a schematic view of the cooling water pneumatic main supply valve and the cooling water return valve return flow path in an embodiment of the present invention;
FIG. 5 is a schematic view of the gas generator sizing element in an embodiment of the present invention.
The reference numbers are as follows:
101-unsymmetrical dimethylhydrazine storage tank, 102-unsymmetrical dimethylhydrazine manual main supply valve, 103-unsymmetrical dimethylhydrazine pneumatic main supply valve, 104-unsymmetrical dimethylhydrazine primary valve, 105-unsymmetrical dimethylhydrazine pneumatic air release valve, 106-safety valve, 107-unsymmetrical dimethylhydrazine manual air release valve, 108-unsymmetrical dimethylhydrazine booster valve, 109-unsymmetrical dimethylhydrazine filter, 110-unsymmetrical dimethylhydrazine mass flowmeter, 201-unsymmetrical dimethylhydrazine liquid collecting loop, 202-unsymmetrical dimethylhydrazine pressure sensor, 203-check valve, 204-unsymmetrical dimethylhydrazine pneumatic blow-off valve, 205-nozzle injection, 206-nozzle, 207-injection hole, 301-outer cylinder, 302-inner cylinder, 401-cooling water tank, 402-cooling water filter, 403-cooling water manual main supply valve, 404-cooling water booster pump, 405 cooling water pressure sensor, 406 cooling water return valve, 407 cooling water pneumatic main supply valve, 408 cooling water spray device, 5 gas generator scale reducing component, 501 fuel path primary valve, 502 fuel path blow-off valve, 503 fuel path product valve, 504 oxidant path product valve, 505 oxidant path blow-off valve, 506 oxidant path primary valve.
Detailed Description
Referring to fig. 1 to 5, the present embodiment provides a high-temperature, high-pressure, high-speed, large-flow-density oxygen-enriched gas treatment system, which includes a gas generator scaling member 5 for generating oxygen-enriched gas, an unsymmetrical dimethylhydrazine supply system, a post-combustion system connected to the unsymmetrical dimethylhydrazine supply system, a gas diversion system, and a cooling water supply system.
The gas generator scale 5 comprises a combustion chamber, a fuel path supply system and an oxidant path supply system;
the fuel line supply system includes a fuel line product valve 503 communicated with the combustion chamber, a fuel line primary valve 501 connected to one input end of the fuel line product valve 503, and a fuel line blow-off valve 502 connected to the other input end of the fuel line product valve 503; the fuel line primary valve 501 is connected to the fuel supply assembly and the fuel line blow-off valve 502 is connected to the fuel line blow-off system.
The oxidizer line supply system includes an oxidizer line product valve 504 communicating with the combustion chamber, an oxidizer line primary valve 506 connected to one input end of the oxidizer line product valve 504, and an oxidizer line blow-off valve 505 connected to the other input end of the oxidizer line product valve 504; the primary oxidizer line valve 506 is connected to the oxidizer supply unit, and the oxidizer blow-off valve 505 is connected to the oxidizer blow-off system.
The unsymmetrical dimethylhydrazine supply system comprises a 2m3A unsymmetrical dimethylhydrazine storage tank 101, a DN50 unsymmetrical dimethylhydrazine manual main supply valve 102 and a regulating valve assembly which are connected on the unsymmetrical dimethylhydrazine storage tank 101; along the unsymmetrical dimethylhydrazine transmission direction, the unsymmetrical dimethylhydrazine manual main supply valve 102 is sequentially connected with a DN50 unsymmetrical dimethylhydrazine pneumatic main supply valve 103 and a DN50 unsymmetrical dimethylhydrazine primary valve 104, and the unsymmetrical dimethylhydrazine primary valve 104 is connected with an afterburning system; the regulating valve assembly comprises a DN32 unsymmetrical dimethylhydrazine pneumatic air release valve 105, a DN32 unsymmetrical dimethylhydrazine manual air release valve 107, a DN32 unsymmetrical dimethylhydrazine pressure increasing valve 108 and a DN32 safety valve 106; a 38 mu M unsymmetrical dimethylhydrazine filter 109 and an 83M40 type E + H unsymmetrical dimethylhydrazine mass flowmeter 110 are arranged between the unsymmetrical dimethylhydrazine manual main supply valve 102 and the unsymmetrical dimethylhydrazine pneumatic main supply valve 103; the unsymmetrical dimethylhydrazine flow can be adjusted by adjusting the tank pressure of the unsymmetrical dimethylhydrazine storage tank 101, so that the afterburning system can obtain the optimal afterburning mixture ratio under various working conditions of the gas generator shrinkage rule piece 5.
The afterburning system comprises an afterburning communicating pipe, an F38 multiplied by 3 unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 communicated with the afterburning communicating pipe, 8F 26 multiplied by 3 injection pipes 205 uniformly arranged at the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 in the circumferential direction and a blowing system, wherein the first ends of the injection pipes 205 are communicated with the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 and are fixedly and hermetically connected; a plurality of injection units are arranged on the injection tube 205; the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 and the injection pipe 205 are made of 1Cr8Ni9Ti materials, and can also be made of other adaptive materials; the afterburning system simplifies the injectors into 8 injection pipes 205, reduces the area loss of the oxygen-enriched gas in the gas diversion system, and avoids the tempering phenomenon caused by congestion of the oxygen-enriched gas in the gas diversion system; meanwhile, the injection tube 205 is connected with the unsymmetrical dimethylhydrazine liquid collecting tube by threads, so that once a single injection tube 205 is structurally damaged, the injection tube is convenient to remove and replace. The afterburning system is simple in structure and convenient to process, and oxygen-enriched fuel gas is rectified by the fuel gas diversion system and then is combusted with unsymmetrical dimethylhydrazine in the afterburning system.
The injection tube 205 is provided with 6 groups of two self-impact injection units; the two-strand self-impact injection unit comprises two nozzles 206 arranged on an injection pipe 205, the nozzles 206 are arranged on the lower end face of the injection pipe 205, the injection direction of the nozzles 206 is downward, the distance between the two nozzles 206 is 30mm, and the length-diameter ratio of the nozzles 206 is Linj/Dinj which is 2.5, wherein Linj is the length of the nozzles 206 in the extending direction, and Dinj is the diameter of the nozzles 206; the self-attack angle of two nozzles 206 in the two-strand self-attack type injection unit is 45 degrees, and the self-attack angle is the included angle between the central axis of the nozzle 206 and the central axis of the injection tube 205; the nozzle 206 is a single-component liquid straight-flow nozzle. The injection area is divided into a central injection area and an outer edge injection area, the central injection area is located in the central area of the afterburning device and consists of 3 groups of injection units with a distance of 40mm, the outer edge injection area is located in the area, close to the unsymmetrical dimethylhydrazine supply ring pipe, of the afterburning device, the outer edge injection area consists of 3 groups of injection units, the distance between each injection unit and the outer edge injection area is 30mm and 20mm in sequence, and the injection units on a single injection pipe 205 are arranged at different distances, so that the distribution density of the nozzles 206 in the inner ring area of the unsymmetrical dimethylhydrazine liquid collection ring pipe 201 is relatively uniform.
The connection position of the injection pipe 205 and the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 is sealed in a line sealing mode; the end face of the second end of the injection pipe 205 is provided with an injection hole 207, the diameter of the injection hole 207 is 0.8mm, and the injection hole is used for enhancing mixing of the unsymmetrical dimethylhydrazine and the oxygen-enriched fuel gas core flow.
The blowing system comprises a one-way valve 203 and a unsymmetrical dimethylhydrazine pneumatic blowing valve 204, and the one-way valve 203 is connected with the communicating pipe; the unsymmetrical dimethylhydrazine pneumatic blow-off valve 204 is connected with the one-way valve 203; and an unsymmetrical dimethylhydrazine pressure sensor 202 is arranged on the afterburning communicating pipe.
The gas diversion system comprises an inner cylinder 302, an outer cylinder 301 and a closed interlayer cavity formed between the inner cylinder 302 and the outer cylinder 301, wherein the inner cylinder 302 comprises an upper port and a lower port, the upper port is used for receiving oxygen-enriched gas generated by the gas generator reducing rule component 5, and the lower port is used for transmitting the oxygen-enriched gas cooled by the cooling water supply system to the afterburning system; the side wall of the outer barrel 301 at the lower end of the interlayer cavity is provided with a cooling liquid inlet, and the side wall of the outer barrel 301 at the upper end of the interlayer cavity is provided with a cooling liquid outlet. Specifically, the gas diversion system is designed pneumatically according to the pneumatic parameters of the gas generator scale reducing piece 5 and the one-dimensional normal shock wave theory; the inner diameter D of the gas diversion system is 1300mm, the length L thereof is 7920mm, and the gas diversion system is used for conducting diversion and rectification on oxygen-enriched gas; after oxygen-enriched fuel gas flows through the fuel gas diversion system, the total pressure is reduced to about 6MPa and the total temperature is also obviously reduced after the oxygen-enriched fuel gas is pressurized by the shock wave system and cooled by cooling water.
The cooling water supply system comprises a 3m3 cooling water tank 401, a 75 μm cooling water filter 402, a DN80 manual main cooling water supply valve 403, a centrifugal cooling water booster pump 404, a cooling water pressure sensor 405, a DN80 pneumatic main cooling water supply valve 407 and three groups of cooling water spray devices 408 extending into the gas guide system inner barrel 302 which are sequentially connected through cooling water pipelines; a cooling water return valve 406 of DN20 is further connected to the cooling water pipe between the cooling water booster pump 404 and the cooling water pneumatic main supply valve 407, the cooling water return valve 406 is communicated with the cooling water tank 401 to form a return passage, specifically, an open cavity of the cooling water pneumatic main supply valve 407 is communicated with a closed cavity of the cooling water return valve 406, and a closed cavity of the cooling water pneumatic main supply valve 407 is communicated with an open cavity of the cooling water return valve 406. The cooling water supply system is used for providing cooling water for the gas diversion system and the afterburning system, the flow rate of the cooling water is 4.5kg/s, and the total temperature of the oxygen-enriched gas can be reduced by adding the cooling water, so that the heat protection of the gas diversion system and the afterburning system is facilitated.
The working process of the high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system comprises the following steps:
s1, opening an unsymmetrical dimethylhydrazine pressure increasing valve, an unsymmetrical dimethylhydrazine manual main supply valve 102, an unsymmetrical dimethylhydrazine pneumatic main supply valve 103, a cooling water manual main supply valve 403 and a cooling water return valve 406; before the gas generator reducing rule piece 5 is started, unsymmetrical dimethylhydrazine of the after-combustion system is filled in front of an unsymmetrical dimethylhydrazine primary valve 104, cooling water is filled in front of a cooling water pneumatic main supply valve 407, and water circulation is formed through a cooling water return valve 406, so that the motor damage caused by the pressure holding of a cooling water booster pump 404 is prevented.
S2, at t-5S, the main cooling water pneumatic supply valve 407 is opened, the cooling water return valve 406 is switched to the closed state, and the cooling water starts cooling the gas diversion system and the afterburning system. At time t-0.14 s, the oxidizer path product valve 504 of the gas generator reducing rule 5 is open, and at time t-0.14 s, the gas generator reducing rule 5 fuel path product valve is open; the inside of the gas generator scale part 5 is in an oxygen-enriched combustion state, gas rich in a large amount of nitrogen oxides enters the inner cylinder 302 of the gas guide system, is cooled by the interlayer water cooling system and the cooling water spraying device 408 and then is discharged to the afterburning system from the lower end of the inner cylinder 302, at t ═ 0.3s, the primary unsymmetrical dimethylhydrazine valve 104 of the unsymmetrical dimethylhydrazine supply system is opened, an oxygen-enriched environment is formed near the afterburning system at the moment through debugging, the unsymmetrical dimethylhydrazine meets the nitrogen oxides after being subjected to self-impact atomization by the two self-impact injection units, and then is combusted automatically, and the concentration of the nitrogen oxides in the gas can be greatly reduced through a combustion reaction. Meanwhile, due to the cooling effect of cooling water, the temperature of the outlet of the gas diversion system and the temperature near the afterburning system are about 450K, and structural damage to the outlet of the gas diversion system and the afterburning system cannot be caused.
S3, when the operation of the gas generator scale 5 is finished, opening the blow-off valve 502, debugging before test, the blow-off valve takes about 0.4S, then closing the primary fuel valve 501 when t is 1.14S, and the blow-off system blows off the residual fuel in the pipe behind the product valve 503 to the combustion chamber of the gas generator scale 5 through the blow-off valve 502.
And S4, when t is 1.34S, closing the primary oxidant circuit valve 506 and the primary unsymmetrical dimethylhydrazine valve 104, opening the pneumatic unsymmetrical dimethylhydrazine blowing valve 204, and blowing unsymmetrical dimethylhydrazine in a pipeline behind the primary unsymmetrical dimethylhydrazine valve 104 to the afterburning system.
S5, when t is 1.44S, closing the fuel path blow-off valve 502, and after the fuel path product valve 503, blowing off the residual fuel in the pipeline substantially; in order to avoid deflagration in the combustion chamber of the gas generator scale piece 5, blowing off the oxidant path is started after blowing off the fuel path for 5s, namely, when t is 6.44s, the oxidant path blowing-off valve 505 is opened, and the oxidant path blowing-off system blows off residual oxidant in the pipeline behind the oxidant path primary valve 506 to the afterburning system through the gas diversion system to react with residual unsymmetrical dimethylhydrazine in the pipeline behind the unsymmetrical dimethylhydrazine primary valve 104;
at S6, when t is 7.24S, the oxidizing agent blow-off valve 505 and the cooling water pneumatic main supply valve 407 are closed, and the cooling water return valve 406 is opened to continue the circulation of the cooling water system.
S7, when t is 9S, closing the unsymmetrical dimethylhydrazine pneumatic blow-off valve 204, and stopping the oxygen-enriched gas afterburning reaction in the afterburning system; the cooling water manual main supply valve 403 is closed.
Compared with the direct discharge of the oxygen-enriched gas, the high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system provided by the embodiment can reduce the concentration of nitrogen oxides (dinitrogen tetroxide) in the oxygen-enriched gas by 75 percent, effectively reduces the concentration of the nitrogen oxides in the oxygen-enriched gas, and is favorable for carrying out ignition tests of the gas generator contraction ruler.
Claims (10)
1. The utility model provides a high temperature high pressure high speed large-traffic density oxygen boosting gas processing system which characterized in that:
comprises a gas generator scale component (5) for generating oxygen-enriched gas, an unsymmetrical dimethylhydrazine supply system, a afterburning system connected with the unsymmetrical dimethylhydrazine supply system, a gas diversion system and a cooling water supply system;
the unsymmetrical dimethylhydrazine supply system is used for supplying unsymmetrical dimethylhydrazine to the afterburning system;
the afterburning system comprises an afterburning communicating pipe, a unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) communicated with the afterburning communicating pipe, and a plurality of radial injection pipes (205) which are uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) in the circumferential direction, wherein the first ends of the injection pipes (205) are communicated with the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) and are in sealing connection; a plurality of injection units are arranged on the injection pipe (205);
the jetting units are a plurality of groups of two-strand self-impact jetting units;
the two-strand self-impact injection unit comprises two nozzles (206) arranged on an injection tube (205), and the two nozzles(206) The distance is 25-35mm, and the length-diameter ratio of the nozzle (206) is Linj/Dinj2.4 to 3.0, wherein LinjIs the length in the extending direction of the nozzle (206), DinjIs the diameter of the nozzle (206); the self-attack angle of a nozzle (206) in the two-strand self-attack type injection unit is 45-60 degrees;
the gas diversion system comprises an inner barrel (302) and an outer barrel (301), the inner barrel comprises an upper port and a lower port, the upper port is used for receiving oxygen-enriched gas generated by a gas generator reducing rule piece (5), and the lower port is used for transmitting the oxygen-enriched gas to the afterburning system;
and the cooling water supply system is used for cooling the afterburning system and the gas diversion system.
2. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to claim 1, characterized in that:
the nozzle (206) is arranged at the lower end of the pipe wall of the injection pipe (205), and the injection direction of the nozzle (206) is downward; the nozzle (206) adopts a single-component liquid direct-flow nozzle.
3. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to claim 2, characterized in that:
the first end of the injection pipe (205) is detachably connected with the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) through threads;
the connecting position of the injection pipe (205) and the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) is sealed in a line sealing mode;
an injection hole (207) is formed in the end face of the second end of the injection pipe (205), and the diameter of the injection hole (207) is 0.8-1.0 mm.
4. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to any one of claims 1 to 3, characterized in that:
the gas diversion system also comprises an interlayer water cooling system;
the interlayer water cooling system comprises a closed interlayer cavity formed between the inner barrel (302) and the outer barrel (301), a cooling liquid inlet located on the side wall of the lower end of the outer barrel (301) and communicated with the interlayer cavity, and a cooling liquid outlet located on the side wall of the upper end of the outer barrel (301) and communicated with the interlayer cavity.
5. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to claim 4, characterized in that:
the unsymmetrical dimethylhydrazine supply system comprises an unsymmetrical dimethylhydrazine storage tank (101), a regulating valve assembly arranged on the unsymmetrical dimethylhydrazine storage tank (101), and a unsymmetrical dimethylhydrazine manual main supply valve (102) connected to the outlet end of the unsymmetrical dimethylhydrazine storage tank (101); the unsymmetrical dimethylhydrazine manual main supply valve (102) is sequentially connected with a unsymmetrical dimethylhydrazine pneumatic main supply valve (103) and a unsymmetrical dimethylhydrazine primary valve (104) along the unsymmetrical dimethylhydrazine transmission direction, and the unsymmetrical dimethylhydrazine primary valve (104) is connected with an afterburning communicating pipe of an afterburning system.
6. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to claim 5, characterized in that:
the regulating valve assembly comprises an unsymmetrical dimethylhydrazine deflation valve, an unsymmetrical dimethylhydrazine pressurization valve (108) and a safety valve (106);
the unsymmetrical dimethylhydrazine deflation valve comprises a unsymmetrical dimethylhydrazine pneumatic deflation valve (105) and a unsymmetrical dimethylhydrazine manual deflation valve (107);
and an unsymmetrical dimethylhydrazine filter (109) and an unsymmetrical dimethylhydrazine mass flow meter (110) are arranged between the unsymmetrical dimethylhydrazine manual main supply valve (102) and the unsymmetrical dimethylhydrazine pneumatic main supply valve (103).
7. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment system according to claim 6, characterized in that:
the afterburning system further comprises a blowing system, the blowing system comprises a one-way valve (203) and a unsymmetrical dimethylhydrazine pneumatic blowing valve (204), the one-way valve (203) is connected with the afterburning communicating pipe, and the unsymmetrical dimethylhydrazine pneumatic blowing valve (204) is connected with the one-way valve (203);
the afterburning communicating pipe is provided with an unsymmetrical dimethylhydrazine pressure sensor (202);
the cooling water supply system comprises a cooling water tank (401), a cooling water manual main supply valve (403), a cooling water booster pump (404), a cooling water pneumatic main supply valve (407) and a cooling water spraying device (408) extending into the inner cylinder of the gas diversion system, which are sequentially connected through a cooling water pipeline; and a cooling water return valve (406) is further connected to a cooling water pipeline between the cooling water booster pump (404) and the cooling water pneumatic main supply valve (407), and the cooling water return valve (406) is communicated with the cooling water tank (401) and used for forming a return passage.
8. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system according to claim 7, characterized in that:
an opening cavity of the cooling water pneumatic main supply valve (407) is communicated with a closing cavity of the cooling water return valve (406), and a closing cavity of the cooling water pneumatic main supply valve (407) is communicated with an opening cavity of the cooling water return valve (406).
9. The high-temperature high-pressure high-speed large-flow-density oxygen-enriched gas treatment system according to claim 8, characterized in that:
the gas generator scale piece (5) comprises a combustion chamber, a fuel path supply system and an oxidant path supply system;
the fuel path supply system comprises a fuel path product valve (503) communicated with the combustion chamber, a fuel path primary valve (501) connected with one input end of the fuel path product valve (503), and a fuel path blow-off valve (502) connected with the other input end of the fuel path product valve (503); the fuel path primary valve (501) is connected with the fuel supply assembly, and the fuel path blow-off valve (502) is connected with the fuel path blow-off system;
the oxidant path supply system comprises an oxidant path product valve (504) communicated with the combustion chamber, an oxidant path primary valve (506) connected with one input end of the oxidant path product valve (504), and an oxidant path blow-off valve (505) connected with the other input end of the oxidant path product valve (504); the primary oxidant path valve (506) is connected to the oxidant supply assembly, and the oxidant path blow-off valve (505) is connected to the oxidant path blow-off system.
10. A high-temperature high-pressure high-speed large-flow-density oxygen-enriched fuel gas treatment method is characterized by comprising the following steps:
s1, opening an unsymmetrical dimethylhydrazine pressure increasing valve (108), an unsymmetrical dimethylhydrazine manual main supply valve (102), an unsymmetrical dimethylhydrazine pneumatic main supply valve (103), a cooling water manual main supply valve (403) and a cooling water pneumatic main supply valve (407);
s2, starting a gas generator reducing rule piece (5), enabling oxygen-enriched gas discharged by the gas generator reducing rule piece (5) to enter an inner cylinder (302) of a gas diversion system, cooling the oxygen-enriched gas by an interlayer water cooling system and a cooling water spraying device (408), discharging the oxygen-enriched gas to a afterburning system from the lower end of the inner cylinder (302), starting an unsymmetrical dimethylhydrazine primary valve (104), and enabling the oxygen-enriched gas to react with unsymmetrical dimethylhydrazine;
s3, when the work of the gas generator scale reducing component (5) is finished, opening a fuel path blow-off valve (502), then closing a fuel path primary valve (501), and blowing residual fuel in a pipeline behind a fuel path product valve (503) to a combustion chamber of the gas generator scale reducing component (5) by a fuel path blow-off system through the fuel path blow-off valve (502);
s4, when the chamber pressure in the combustion chamber of the gas generator contraction ruler piece (5) is reduced to 50% of the rated chamber pressure, closing the primary oxidant circuit valve (506) and the primary unsymmetrical dimethylhydrazine valve (104), opening the pneumatic unsymmetrical dimethylhydrazine blow-off valve (204), and blowing off the unsymmetrical dimethylhydrazine in the pipeline behind the primary unsymmetrical dimethylhydrazine valve (104) to the afterburning system;
s5, when the chamber pressure in the combustion chamber of the gas generator contraction rule piece (5) is reduced to 10% of the rated chamber pressure, closing the fuel path blow-off valve (502), opening the oxidant path blow-off valve (505), blowing the residual oxidant in the pipeline behind the oxidant path primary valve (506) to the afterburning system by the oxidant path blow-off system through the gas diversion system, and reacting with the residual unsymmetrical dimethylhydrazine in the pipeline behind the unsymmetrical dimethylhydrazine primary valve (104);
s6, the gas outlet of the gas generator reducing rule piece (5) does not spray oxygen-enriched gas, the oxidant path blow-off valve (505) and the cooling water pneumatic main supply valve (407) are closed, the cooling water return valve (406) is opened at the same time, and the cooling water system continues to circulate;
s7, closing the unsymmetrical dimethylhydrazine pneumatic blow-off valve (204), stopping the oxygen-enriched fuel gas afterburning combustion reaction in the afterburning system, and closing the cooling water manual main supply valve (403).
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