CN114718768B - High-temperature high-pressure high-speed high-flow density oxygen-enriched gas treatment system and method - Google Patents
High-temperature high-pressure high-speed high-flow density oxygen-enriched gas treatment system and method Download PDFInfo
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- CN114718768B CN114718768B CN202210350679.1A CN202210350679A CN114718768B CN 114718768 B CN114718768 B CN 114718768B CN 202210350679 A CN202210350679 A CN 202210350679A CN 114718768 B CN114718768 B CN 114718768B
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- unsymmetrical dimethylhydrazine
- cooling water
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- gas
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- 239000007789 gas Substances 0.000 title claims abstract description 118
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000001301 oxygen Substances 0.000 title claims abstract description 67
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 67
- 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 142
- 239000000498 cooling water Substances 0.000 claims abstract description 114
- 238000002347 injection Methods 0.000 claims abstract description 72
- 239000007924 injection Substances 0.000 claims abstract description 72
- 239000002737 fuel gas Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000000446 fuel Substances 0.000 claims description 60
- 239000007800 oxidant agent Substances 0.000 claims description 56
- 230000001590 oxidative effect Effects 0.000 claims description 52
- 238000007664 blowing Methods 0.000 claims description 38
- 238000002485 combustion reaction Methods 0.000 claims description 29
- 239000011229 interlayer Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010992 reflux Methods 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 239000010763 heavy fuel oil Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 57
- 238000012360 testing method Methods 0.000 abstract description 14
- 230000006378 damage Effects 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 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
- 239000003380 propellant Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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 high-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 the nitrogen oxides is not suitable for the test of a scale-reducing part of the gas generator. The system comprises a unsymmetrical dimethylhydrazine supply system, an 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, a unsymmetrical dimethylhydrazine liquid collecting ring pipe communicated with the afterburning communicating pipe and a plurality of injection pipes which are circumferentially and uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe, wherein a plurality of injection units are arranged on the injection pipes. The method includes 1, opening a cooling water supply system; 2. starting a scale-reducing part of the gas generator, and reacting the oxygen-enriched gas with the unsymmetrical dimethylhydrazine; 3. and when the work of the gas generator scale reduction piece is completed, performing a closing procedure.
Description
Technical Field
The invention relates to a method for treating oxygen-enriched gas of a gas generator of an afterburning engine, in particular to a system and a method for treating high-temperature high-pressure high-speed high-flow density oxygen-enriched gas.
Background
The normal temperature propellant high pressure afterburning engine comprises a gas generator and an afterburning thrust chamber, and adopts a propellant combination of nitrogen oxides and hydrazine fuels. The gas generator is an oxygen-enriched precombustion chamber, and the generated oxygen-enriched fuel gas and fuel in the afterburning thrust chamber are subjected to secondary combustion; the gas generator needs to develop the reduced-scale ignition test before the full-size engine is developed. The gas generator scale member has a mixing ratio of 19 under the rated working condition, the gas temperature at the outlet of the spray pipe is about 1200K, the pressure is about 11MPa, the flow rate is about 600m/s, and the gas flow density can reach 9500 kg/s.m 2 . The gas generated in the gas generator test process contains a large amount of nitrogen oxides, and the flow rate of the nitrogen oxides is about 15.8kg/s. Therefore, in the ignition test process of the gas generator scale, the gas rich in nitrogen oxides must be treated to reduce the harm of the nitrogen oxides in the gas to the body of the test personnel and the pollution to the environment of the 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 speed, high flow density and the like in the gas generator scale test process, and the existing nitrogen oxide treatment device cannot be matched with the working condition of the gas generator scale test process. In order to match the working environment of high temperature, high pressure, high speed and high flow density in the gas generator scale test, a new device and method are needed to treat nitrogen oxides in the oxygen-enriched gas.
Disclosure of Invention
The invention aims to solve the problems that nitrogen oxides contained in oxygen-enriched fuel gas generated under the test condition of a fuel gas generator have personal hazard and environmental pollution, and the conventional treatment method for the nitrogen oxides is not suitable for the test of a scale-reducing piece of the fuel gas generator, and provides a high-temperature high-pressure high-speed high-flow-rate density oxygen-enriched fuel gas treatment system and method.
The technical scheme provided by the invention is as follows:
the high-temperature high-pressure high-speed high-flow density oxygen-enriched gas treatment system is characterized in that:
comprises a gas generator scale piece for generating oxygen-enriched gas, a unsymmetrical dimethylhydrazine supply system, an afterburning system connected with the unsymmetrical dimethylhydrazine supply system, a gas flow guiding system and a cooling water supply system;
the unsymmetrical dimethylhydrazine supply system is used for providing 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 circumferentially and uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe, wherein the first end of each injection pipe is communicated with the unsymmetrical dimethylhydrazine liquid collecting ring pipe and is in sealing connection; a plurality of injection units are arranged on the injection pipe;
the injection units are multiple groups of two-strand self-impact injection 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 L inj /D inj =2.4 to 3.0, where L inj D is the length in the extending direction of the nozzle inj Is the diameter of the nozzle; the self-striking angle of the nozzle in the two-strand self-striking type injection unit is 45-60 degrees;
the fuel gas flow guiding system comprises an inner cylinder and an outer cylinder, wherein the inner cylinder comprises an upper port and a lower port, the upper port is used for receiving oxygen-enriched fuel gas generated by a scale-up piece of the fuel gas generator, and the lower port is used for transmitting the oxygen-enriched fuel gas to the afterburner system;
the cooling water supply system is used for cooling the afterburning system and the fuel 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-current nozzle.
Further, the first end of the injection tube is detachably connected with the unsymmetrical dimethylhydrazine liquid collecting ring tube through threads;
the connection position of the injection pipe and the unsymmetrical dimethylhydrazine liquid collecting ring pipe is sealed in a line sealing mode;
the end face of the second end of the injection pipe is provided with an injection hole, and the injection hole diameter is 0.8-1.0mm.
Further, the fuel gas diversion system also comprises an interlayer water cooling system;
the interlayer water cooling system comprises a closed interlayer cavity formed between the inner cylinder and the outer cylinder, a cooling liquid inlet which is positioned on the side wall of the lower end of the outer cylinder and communicated with the interlayer cavity, and a cooling liquid outlet which is positioned on the side wall of the upper end of the outer cylinder and communicated with the interlayer cavity.
Further, the unsymmetrical dimethylhydrazine supply system comprises a unsymmetrical dimethylhydrazine storage tank, a regulating valve assembly arranged on the unsymmetrical dimethylhydrazine storage tank and a unsymmetrical dimethylhydrazine manual total supply valve connected with the outlet end of the unsymmetrical dimethylhydrazine storage tank; along the transmission direction of the unsymmetrical dimethylhydrazine, the manual unsymmetrical dimethylhydrazine total supply valve is sequentially connected with the pneumatic unsymmetrical dimethylhydrazine total supply valve and the primary unsymmetrical dimethylhydrazine valve, and the primary unsymmetrical dimethylhydrazine valve is connected with an afterburning communicating pipe of an afterburning system;
further, the regulating valve component comprises a unsymmetrical dimethylhydrazine relief valve, a unsymmetrical dimethylhydrazine booster valve and a safety valve;
the unsymmetrical dimethylhydrazine air release valve comprises a unsymmetrical dimethylhydrazine pneumatic air release valve and a unsymmetrical dimethylhydrazine manual air release valve;
and a unsymmetrical dimethylhydrazine filter and a unsymmetrical dimethylhydrazine mass flowmeter are arranged between the unsymmetrical dimethylhydrazine manual total supply valve and the unsymmetrical dimethylhydrazine pneumatic total supply valve.
Further, the afterburning system further comprises a blowing-off system, 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 a unsymmetrical dimethylhydrazine pressure sensor;
the cooling water supply system comprises a cooling water tank, a cooling water manual total supply valve, a cooling water booster pump, a cooling water pneumatic total supply valve and a cooling water spraying device which stretches into the inner barrel of the fuel gas diversion system, wherein the cooling water tank, the cooling water manual total supply valve, the cooling water booster pump and the cooling water pneumatic total supply valve are sequentially connected through a cooling water pipeline; the cooling water pipeline between the cooling water booster pump and the cooling water pneumatic total supply valve is also connected with a cooling water reflux valve, and the cooling water reflux valve is communicated with the cooling water tank and is used for forming a reflux passage.
Further, the opening cavity of the cooling water pneumatic total supply valve is communicated with the closing cavity of the cooling water return valve, and the closing cavity of the cooling water pneumatic total supply valve is communicated with the opening cavity of the cooling water return valve.
Further, the gas generator scale 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 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 blowing 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 blowing valve is connected with the fuel path blowing 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 blowing valve connected with the other input end of the oxidant path product valve; the oxidant way primary valve is connected with the oxidant supply assembly, and the oxidant way blowing valve is connected with the oxidant way blowing system.
Meanwhile, the invention also provides a high-temperature high-pressure high-speed high-flow density oxygen-enriched gas treatment method, which is characterized by comprising the following steps of:
s1, opening a unsymmetrical dimethylhydrazine booster valve, a unsymmetrical dimethylhydrazine manual total supply valve, a unsymmetrical dimethylhydrazine pneumatic total supply valve, a cooling water manual total supply valve and a cooling water pneumatic total supply valve;
s2, starting a gas generator scale reducing part, wherein oxygen-enriched gas discharged by the gas generator scale reducing part enters an inner cylinder of a gas flow guiding system, is cooled by an interlayer water cooling system and a cooling water spraying device, is discharged to a post-combustion system from the lower end of the inner cylinder, and starts a primary valve of the unsymmetrical dimethylhydrazine, and the oxygen-enriched gas reacts with the unsymmetrical dimethylhydrazine;
s3, when the work of the gas generator scale-reducing piece is completed, opening a fuel path blowing valve, then closing a fuel path primary valve, and blowing residual fuel in a pipeline behind a fuel path product valve to a combustion chamber of the gas generator scale-reducing piece by the fuel path blowing system through the fuel path blowing valve;
s4, after the chamber pressure in the combustion chamber of the gas generator scale piece is reduced to 50% of the rated chamber pressure, closing the oxidant path primary valve and the unsymmetrical dimethylhydrazine primary valve, opening a unsymmetrical dimethylhydrazine pneumatic blow-off valve, and blowing off unsymmetrical dimethylhydrazine in a pipeline behind the unsymmetrical dimethylhydrazine primary valve to a post-combustion system;
s5, after the chamber pressure in the combustion chamber of the gas generator scale piece is reduced to 10% of the rated chamber pressure, closing the fuel path blowing valve, opening the oxidant path blowing valve, and blowing residual oxidant in the pipeline behind the oxidant path primary valve to the afterburning system by the oxidant path blowing system through the gas diversion system to react with residual unsymmetrical dimethylhydrazine in the pipeline behind the unsymmetrical dimethylhydrazine primary valve;
s6, the fuel gas outlet of the scale part of the fuel gas generator is not sprayed with oxygen-enriched fuel gas, the oxidant path blowing valve and the cooling water pneumatic total supply valve are closed, the cooling water reflux valve is opened, and the cooling water system continues to circulate;
and S7, closing the unsymmetrical dimethylhydrazine pneumatic blow-off valve, stopping the oxygen-enriched gas afterburning combustion reaction in the afterburning system, and closing the manual total supply valve of the cooling water.
The invention has the beneficial effects that:
1. the oxygen-enriched fuel gas treatment system adopts the unsymmetrical dimethylhydrazine as the afterburning fuel, has the advantages that the unsymmetrical dimethylhydrazine can be spontaneously combusted after meeting nitrogen oxides, and effectively avoids the problem of catalyst poisoning in a catalytic combustion method.
2. The oxygen-enriched gas treatment system is provided with the gas flow guiding device, and has the advantages that the gas flow guiding device can rectify oxygen-enriched gas, so that secondary combustion can be stably carried out.
3. According to the oxygen-enriched gas treatment system, two modes of interlayer water cooling of the gas diversion system and water film cooling of the cooling water supply system are adopted, so that the thermal stress of the gas diversion device and the afterburner can be effectively reduced, and the structural reliability of the gas diversion device in a high-temperature environment can be effectively improved.
4. The secondary combustion in the afterburning device of the oxygen-enriched gas treatment method still is oxygen-enriched combustion, and has the advantages that the unsymmetrical dimethylhydrazine can be fully combusted in the oxygen-enriched gas, so that secondary pollution possibly caused by unsymmetrical dimethylhydrazine is effectively avoided, and simultaneously, the unsymmetrical dimethylhydrazine provided by the unsymmetrical dimethylhydrazine supply system reacts with the oxygen-enriched gas, so that the nitrogen oxide content in the oxygen-enriched gas with high temperature, high pressure, high speed and high flow density generated in the gas generator scale component test can be effectively reduced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of the present invention;
FIG. 2 is a schematic diagram of a liquid collecting ring pipe and an injection pipe of the unsymmetrical dimethylhydrazine in an embodiment of the present invention;
FIG. 3 is a schematic view of an injection tube according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a return path of a cooling water pneumatic total supply valve and a cooling water return valve according to an embodiment of the present invention;
FIG. 5 is a schematic view of a gas generator scale according to an embodiment of the present invention.
The reference numerals are as follows:
a 101-unsymmetrical dimethylhydrazine storage tank, a 102-unsymmetrical dimethylhydrazine manual total supply valve, a 103-unsymmetrical dimethylhydrazine pneumatic total supply valve, a 104-unsymmetrical dimethylhydrazine primary valve, a 105-unsymmetrical dimethylhydrazine pneumatic air release valve, a 106-relief valve, a 107-unsymmetrical dimethylhydrazine manual air release valve, a 108-unsymmetrical dimethylhydrazine pressurizing valve, a 109-unsymmetrical dimethylhydrazine filter, a 110-unsymmetrical dimethylhydrazine mass flowmeter, a 201-unsymmetrical dimethylhydrazine liquid collecting ring pipe, a 202-unsymmetrical dimethylhydrazine pressure sensor, a 203-check valve, a 204-unsymmetrical dimethylhydrazine pneumatic air blow-off valve, a 205-jetting pipe and a 206-jetting nozzle, 207-injection holes, 301-outer cylinder, 302-inner cylinder, 401-cooling water tank, 402-cooling water filter, 403-cooling water manual total supply valve, 404-cooling water booster pump, 405-cooling water pressure sensor, 406-cooling water return valve, 407-cooling water pneumatic total supply valve, 408-cooling water spray device, 5-gasifier scale, 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 high-flow density oxygen-enriched gas treatment system, which comprises a gas generator scale member 5 for generating oxygen-enriched gas, a unsymmetrical dimethylhydrazine supply system, an afterburning system connected with the unsymmetrical dimethylhydrazine supply system, a gas diversion system and a cooling water supply system.
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 includes a fuel path product valve 503 in communication with the combustion chamber, a fuel path primary valve 501 connected to one input of the fuel path product valve 503, and a fuel path purge valve 502 connected to the other input of the fuel path product valve 503; the fuel line primary valve 501 is connected to the fuel supply assembly and the fuel line purge valve 502 is connected to the fuel line purge system.
The oxidant path supply system includes an oxidant path product valve 504 in communication with the combustion chamber, an oxidant path primary valve 506 in communication with one input of the oxidant path product valve 504, and an oxidant path purge valve 505 in communication with the other input of the oxidant path product valve 504; the oxidant line primary valve 506 interfaces with the oxidant supply assembly and the oxidant line blow-off valve 505 interfaces with the oxidant line blow-off system.
The unsymmetrical dimethylhydrazine supply system comprises a 2m 3 A unsymmetrical dimethylhydrazine storage tank 101, a DN50 unsymmetrical dimethylhydrazine manual total supply valve 102 and a regulating valve component connected to the unsymmetrical dimethylhydrazine storage tank 101; along the transmission direction of the unsymmetrical dimethylhydrazine, a manual unsymmetrical dimethylhydrazine total supply valve 102 is sequentially connected with a DN50 unsymmetrical dimethylhydrazine pneumatic total supply valve 103 and a DN50 unsymmetrical dimethylhydrazine primary valve 104, and the unsymmetrical dimethylhydrazine primary valve 104 is connected with an afterburning system; regulating valve groupThe components comprise a DN32 unsymmetrical dimethylhydrazine pneumatic air release valve 105, a DN32 unsymmetrical dimethylhydrazine manual air release valve 107, a DN32 unsymmetrical dimethylhydrazine booster 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 total supply valve 102 and the unsymmetrical dimethylhydrazine pneumatic total supply valve 103; by adjusting the tank pressure of the unsymmetrical dimethylhydrazine storage tank 101, the adjustment of the unsymmetrical dimethylhydrazine flow can be realized, and then the optimal afterburning mixing ratio of the afterburning system can be obtained under various working conditions of the gas generator scale piece 5.
The afterburning system comprises an afterburning communicating pipe, an F38X3 unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 communicated with the afterburning communicating pipe, 8 F26X3 injection pipes 205 circumferentially and uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 and a blowing-off system, wherein the first end of each injection pipe 205 is communicated with the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 and fixedly and hermetically connected with each other; the injection pipe 205 is provided with a plurality of injection units; the unsymmetrical dimethylhydrazine liquid collecting ring pipe 201 and the injection pipe 205 are made of 1Cr8Ni9Ti material, and can be made of other adaptive materials; the post-combustion system simplifies the injector into 8 injection pipes 205, reduces the flow area loss of the oxygen-enriched fuel gas in the fuel gas diversion system, and avoids the backfire phenomenon of the oxygen-enriched fuel gas in the fuel gas diversion system caused by congestion; meanwhile, the injection pipe 205 is connected with the unsymmetrical dimethylhydrazine liquid collecting pipe by adopting threads, and once the structure of the single injection pipe 205 is damaged, the single injection pipe is convenient to dismantle and replace. The afterburning system has a simple structure, is convenient to process, and the oxygen-enriched fuel gas is rectified by the fuel gas flow guide system and then burnt with the unsymmetrical dimethylhydrazine in the afterburning system.
The injection pipe 205 is provided with 6 groups of two-strand self-impact injection units; the two-strand self-impact type injection unit comprises two nozzles 206 arranged on an injection pipe 205, wherein the nozzles 206 are arranged on the lower end surface of the injection pipe 205, the injection direction of the nozzles 206 is downward, the distance between the two nozzles 206 is 30mm, the length-diameter ratio of the nozzles 206 is Linj/dinj=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-striking angle of the two nozzles 206 in the two-strand self-striking type injection unit is 45 degrees, and the self-striking angle is an included angle between the central axis of the nozzle 206 and the central axis of the injection pipe 205; the nozzle 206 is a single component liquid dc nozzle. The injection zone is divided into a central injection zone and an outer edge injection zone, the central injection zone is located in the central area of the afterburner and consists of 3 groups of injection units with the distance of 40mm, the outer edge injection zone is located in the area of the afterburner close to the unsymmetrical dimethylhydrazine supply loop pipe, the outer edge injection zone consists of 3 groups of injection units, the distances from the central injection zone to the outer edge injection zone are sequentially 30mm and 20mm, and the different setting distances of the injection units on a single injection pipe 205 enable the distribution density of the nozzles 206 in the inner ring area of the unsymmetrical dimethylhydrazine liquid collection loop pipe 201 to be 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; an end face of the second end of the injection tube 205 is provided with an injection hole 207, the diameter of the injection hole 207 is 0.8mm, for enhancing the blending of the unsymmetrical dimethylhydrazine with the oxygen enriched fuel gas core stream.
The blowing-off system comprises a one-way valve 203 and a unsymmetrical dimethylhydrazine pneumatic blowing-off valve 204, and the one-way valve 203 is connected with a communicating pipe; the unsymmetrical dimethylhydrazine pneumatic blow-off valve 204 is connected with the one-way valve 203; the afterburning communicating pipe is provided with a unsymmetrical dimethylhydrazine pressure sensor 202.
The fuel 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 fuel gas generated by a gas generator scale piece 5, and the lower port is used for transmitting the oxygen-enriched fuel gas cooled by the cooling water supply system to the afterburner 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 flow guiding system carries out pneumatic design on the gas flow guiding system according to the pneumatic parameters of the scale piece 5 of the gas generator and the one-dimensional normal shock wave theory; the internal diameter D=1300 mm and the length L=7920 mm of the fuel gas flow guiding system are used for guiding and rectifying the oxygen-enriched fuel gas; after the oxygen-enriched gas flows through the gas flow guiding system and is pressurized by a shock system and cooled by cooling water, the total pressure is reduced to about 6MPa, and the total temperature is also obviously reduced.
The cooling water supply system comprises a 3m3 cooling water tank 401, a 75 mu m cooling water filter 402, a DN80 cooling water manual total supply valve 403, a centrifugal cooling water booster pump 404, a cooling water pressure sensor 405, a DN80 cooling water pneumatic total supply valve 407 and three groups of cooling water spraying devices 408 which extend into the inner cylinder 302 of the gas diversion system, which are sequentially connected through cooling water pipelines; the cooling water pipeline between the cooling water booster pump 404 and the cooling water pneumatic total supply valve 407 is also connected with a DN20 cooling water reflux valve 406, the cooling water reflux valve 406 is communicated with the cooling water tank 401 for forming a reflux passage, specifically, an opening cavity of the cooling water pneumatic total supply valve 407 is communicated with a closing cavity of the cooling water reflux valve 406, and a closing cavity of the cooling water pneumatic total supply valve 407 is communicated with an opening cavity of the cooling water reflux 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 addition of the cooling water can reduce the total temperature of the oxygen-enriched gas, so that the thermal protection of the gas diversion system and the afterburning system is facilitated.
The working process of the high-temperature high-pressure high-speed high-flow-rate density oxygen-enriched fuel gas treatment system comprises the following steps of:
s1, opening a unsymmetrical dimethylhydrazine booster valve, a unsymmetrical dimethylhydrazine manual total supply valve 102, a unsymmetrical dimethylhydrazine pneumatic total supply valve 103, a cooling water manual total supply valve 403 and a cooling water return valve 406; before the gas generator scale 5 is started, the supplemental combustion system is filled with the unsymmetrical dimethylhydrazine before the unsymmetrical dimethylhydrazine primary valve 104, the cooling water is filled before the cooling water pneumatic total supply valve 407, and water circulation is formed through the cooling water return valve 406, so that the motor damage caused by the pressure suppression of the cooling water booster pump 404 is prevented.
S2, at t= -5S, the cooling water pneumatic total supply valve 407 is opened, the cooling water return valve 406 is switched to a closed state, and the cooling water starts to cool the gas diversion system and the afterburner system. At t=0 s, the oxidizer line product valve 504 of the gasifier scale 5 is open, and at time t=0.14 s, the fuel line product valve of the gasifier scale 5 is open; the gas rich in a large amount of nitrogen oxides enters the inner cylinder 302 of the gas diversion system after being cooled by the interlayer water cooling system and the cooling water spraying device 408, is discharged to the afterburning system from the lower end of the inner cylinder 302, and at t=0.3 s, the primary valve 104 of the unsymmetrical dimethylhydrazine supply system is opened, and an oxygen-enriched environment is formed near the afterburning system at the moment after debugging, so that the unsymmetrical dimethylhydrazine is self-burned after being self-hit atomized by the two-strand self-hit type injection unit and meets the nitrogen oxides, and the concentration of the nitrogen oxides in the gas can be greatly reduced through combustion reaction. Meanwhile, due to the cooling effect of the cooling water, the temperature of the outlet of the gas diversion system and the temperature near the afterburner system are about 450K, and structural damage to the outlet of the gas diversion system and the outlet of the afterburner system can not be caused.
S3, when the work of the gas generator scale 5 is completed at t=0.74S, the fuel path blowing valve 502 is opened, the corresponding time of the blowing valve is about 0.4S after the debugging before the trial, then at t=1.14S, the fuel path primary valve 501 is closed, and the fuel path blowing system blows residual fuel in the pipeline after the fuel path product valve 503 to the combustion chamber of the gas generator scale 5 through the fuel path blowing valve 502.
S4, at t=1.34S, the oxidant primary valve 506 and the primary valve 104 are closed, the pneumatic blowing valve 204 for the unsymmetrical dimethylhydrazine is opened, and the unsymmetrical dimethylhydrazine in the pipeline behind the primary valve 104 is blown off to the afterburning system.
S5, at t=1.44S, the fuel path blowing valve 502 is closed, and the residual fuel in the pipeline is basically blown off after the fuel path product valve 503; in order to avoid deflagration in the combustion chamber of the gas generator scale 5, starting to blow off the oxidant path after 5s of fuel path blowing, namely opening the oxidant path blowing valve 505 at t=6.44 s, and blowing off the residual oxidant in the pipeline behind the oxidant path primary valve 506 to the afterburner system by the oxidant path blowing-off system through the gas diversion system to react with the residual unsymmetrical dimethylhydrazine in the pipeline behind the unsymmetrical dimethylhydrazine primary valve 104;
s6, at t=7.24S, the oxidant path blow-off valve 505 and the cooling water pneumatic total supply valve 407 are closed, and at the same time, the cooling water return valve 406 is opened, and the cooling water system continues to circulate.
S7, at t=9s, closing the unsymmetrical dimethylhydrazine pneumatic blow-off valve 204, and stopping the oxygen-enriched gas afterburning combustion reaction in the afterburning system; the cooling water manual total supply valve 403 is closed.
Compared with the direct emission of the oxygen-enriched gas, the high-temperature high-pressure high-speed high-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%, effectively reduces the concentration of the nitrogen oxides in the oxygen-enriched gas, and is beneficial to developing the ignition test of the gas generator scale piece.
Claims (9)
1. A high-temperature high-pressure high-speed high-flow density oxygen-enriched gas treatment system is characterized in that:
comprises a gas generator scale (5) for generating oxygen-enriched gas, a unsymmetrical dimethylhydrazine supply system, an 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 providing 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) circumferentially and uniformly arranged on the inner side of the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201), wherein the first end of each injection pipe (205) is communicated with the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) and is in sealing connection; a plurality of injection units are arranged on the injection pipe (205);
the injection units are multiple groups of two-strand self-impact injection units;
the two-strand self-impact type injection unit comprises two nozzles (206) arranged on an injection pipe (205), the distance between the two nozzles (206) is 25-35mm, and the length-diameter ratio of the nozzles (206) is L inj /D inj =2.4 to 3.0, where L inj For the length in the direction of extension of the nozzle (206), D inj Is the diameter of the nozzle (206); the self-striking angle of the nozzle (206) in the two-strand self-striking type injection unit is 45-60 degrees;
the fuel gas flow guiding system comprises an inner cylinder (302) and an outer cylinder (301), wherein the inner cylinder comprises an upper port and a lower port, the upper port is used for receiving oxygen-enriched fuel gas generated by a gas generator scale piece (5), and the lower port is used for transmitting the oxygen-enriched fuel gas to the afterburner system;
the cooling water supply system is used for cooling the afterburning system and the fuel gas diversion system;
the system comprises a unsymmetrical dimethylhydrazine storage tank (101), a regulating valve assembly arranged on the unsymmetrical dimethylhydrazine storage tank (101) and a unsymmetrical dimethylhydrazine manual total supply valve (102) connected with the outlet end of the unsymmetrical dimethylhydrazine storage tank (101); along the direction of the transmission of the unsymmetrical dimethylhydrazine, a manual unsymmetrical dimethylhydrazine total supply valve (102) is sequentially connected with a pneumatic unsymmetrical dimethylhydrazine total supply valve (103) and a primary unsymmetrical dimethylhydrazine valve (104), and the primary unsymmetrical dimethylhydrazine valve (104) is connected with an afterburning communicating pipe of an afterburning system.
2. The high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of claim 1, wherein:
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) is a single component liquid direct current nozzle.
3. The high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of claim 2, wherein:
the first end of the injection pipe (205) is detachably connected with the unsymmetrical dimethylhydrazine liquid collecting ring pipe (201) through threads;
the connection 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 0.8-1.0mm.
4. A high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system according to any one of claims 1-3, wherein:
the fuel gas diversion system also comprises an interlayer water cooling system;
the interlayer water cooling system comprises an enclosed interlayer cavity formed between the inner cylinder (302) and the outer cylinder (301), a cooling liquid inlet which is positioned on the side wall of the lower end of the outer cylinder (301) and communicated with the interlayer cavity, and a cooling liquid outlet which is positioned on the side wall of the upper end of the outer cylinder (301) and communicated with the interlayer cavity.
5. The high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of claim 4, wherein:
the regulating valve assembly comprises a unsymmetrical dimethylhydrazine relief valve, a unsymmetrical dimethylhydrazine booster valve (108) and a safety valve (106);
the unsymmetrical dimethylhydrazine air release valve comprises a unsymmetrical dimethylhydrazine pneumatic air release valve (105) and a unsymmetrical dimethylhydrazine manual air release valve (107);
a unsymmetrical dimethylhydrazine filter (109) and a unsymmetrical dimethylhydrazine mass flowmeter (110) are arranged between the unsymmetrical dimethylhydrazine manual total supply valve (102) and the unsymmetrical dimethylhydrazine pneumatic total supply valve (103).
6. The high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of claim 5, wherein:
the afterburning system further comprises a blowing-off system, the blowing-off system comprises a one-way valve (203) and a unsymmetrical dimethylhydrazine pneumatic blowing-off valve (204), the one-way valve (203) is connected with an afterburning communicating pipe, and the unsymmetrical dimethylhydrazine pneumatic blowing-off valve (204) is connected with the one-way valve (203);
the afterburning communicating pipe is provided with a unsymmetrical dimethylhydrazine pressure sensor (202);
the cooling water supply system comprises a cooling water tank (401), a cooling water manual total supply valve (403), a cooling water booster pump (404), a cooling water pneumatic total supply valve (407) and a cooling water spraying device (408) which stretches into the inner barrel of the fuel gas diversion system, wherein the cooling water tank, the cooling water manual total supply valve (403), the cooling water booster pump (404) and the cooling water pneumatic total supply valve (407) are sequentially connected through a cooling water pipeline; the cooling water pipeline between the cooling water booster pump (404) and the cooling water pneumatic total supply valve (407) is also connected with a cooling water reflux valve (406), and the cooling water reflux valve (406) is communicated with the cooling water tank (401) and is used for forming a reflux passage.
7. The high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of claim 6, wherein:
the opening cavity of the cooling water pneumatic total supply valve (407) is communicated with the closing cavity of the cooling water return valve (406), and the closing cavity of the cooling water pneumatic total supply valve (407) is communicated with the opening cavity of the cooling water return valve (406).
8. The high temperature, high pressure, high velocity, high flow density oxygen enriched gas processing system of claim 7, wherein:
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 blowing 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 blowing valve (502) is connected with the fuel path blowing system;
the oxidant way supply system comprises an oxidant way product valve (504) communicated with the combustion chamber, an oxidant way primary valve (506) connected with one input end of the oxidant way product valve (504) and an oxidant way blow-off valve (505) connected with the other input end of the oxidant way product valve (504); an oxidant path primary valve (506) is connected to the oxidant supply assembly and an oxidant path purge valve (505) is connected to the oxidant path purge system.
9. The high-temperature high-pressure high-speed high-flow density oxygen-enriched fuel gas treatment method is characterized by comprising the following steps of:
s1, opening a unsymmetrical dimethylhydrazine booster valve (108), a unsymmetrical dimethylhydrazine manual total supply valve (102), a unsymmetrical dimethylhydrazine pneumatic total supply valve (103), a cooling water manual total supply valve (403) and a cooling water pneumatic total supply valve (407);
s2, starting a gas generator scale reducing piece (5), enabling oxygen-enriched gas discharged by the gas generator scale reducing piece (5) to enter an inner cylinder (302) of a gas flow guiding system, cooling by an interlayer water cooling system and a cooling water spraying device (408), discharging the cooled oxygen-enriched gas to a afterburning system from the lower end of the inner cylinder (302), and starting a primary valve (104) of the unsymmetrical dimethylhydrazine, wherein the oxygen-enriched gas reacts with the unsymmetrical dimethylhydrazine;
s3, when the work of the gas generator scale piece (5) is completed, opening the fuel path blowing valve (502), then closing the fuel path primary valve (501), and blowing residual fuel in a pipeline after the fuel path product valve (503) to a combustion chamber of the gas generator scale piece (5) by the fuel path blowing system through the fuel path blowing valve (502);
s4, after the chamber pressure in the combustion chamber of the gas generator scale (5) is reduced to 50% of the rated chamber pressure, closing the oxidant path primary valve (506) and the unsymmetrical dimethylhydrazine primary valve (104), opening the unsymmetrical dimethylhydrazine pneumatic blow-off valve (204), and blowing off the unsymmetrical dimethylhydrazine in the pipeline behind the unsymmetrical dimethylhydrazine primary valve (104) to the afterburning system;
s5, after the chamber pressure in the combustion chamber of the gas generator scale (5) is reduced to 10% of the rated chamber pressure, closing a fuel path blowing valve (502), opening an oxidant path blowing valve (505), and blowing residual oxidant in a pipeline behind an oxidant path primary valve (506) to an afterburning system by the oxidant path blowing system through a gas diversion system to react with residual unsymmetrical dimethylhydrazine in the pipeline behind a unsymmetrical dimethylhydrazine primary valve (104);
s6, the fuel gas outlet of the fuel gas generator scale (5) is not sprayed with oxygen-enriched fuel gas, the oxidant path blowing valve (505) and the cooling water pneumatic total supply valve (407) are closed, and meanwhile, the cooling water reflux valve (406) is opened, and the cooling water system continues to circulate;
and S7, closing the unsymmetrical dimethylhydrazine pneumatic blow-off valve (204), stopping the oxygen-enriched gas afterburning combustion reaction in the afterburning system, and closing the manual total supply valve (403) of cooling water.
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