CN116398899B - Centrifugal air hydrogen torch igniter - Google Patents
Centrifugal air hydrogen torch igniter Download PDFInfo
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- CN116398899B CN116398899B CN202310219490.3A CN202310219490A CN116398899B CN 116398899 B CN116398899 B CN 116398899B CN 202310219490 A CN202310219490 A CN 202310219490A CN 116398899 B CN116398899 B CN 116398899B
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- hydrogen
- air
- combustion chamber
- injector
- torch igniter
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 134
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 134
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 238000002485 combustion reaction Methods 0.000 claims abstract description 85
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 18
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 10
- 230000008602 contraction Effects 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 239000002737 fuel gas Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910000601 superalloy Inorganic materials 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000007800 oxidant agent Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q3/00—Igniters using electrically-produced sparks
- F23Q3/008—Structurally associated with fluid-fuel burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/78—Cooling burner parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
The invention belongs to the technical field of combustion and ignition, and discloses a centrifugal air-hydrogen torch igniter. The centrifugal air hydrogen torch igniter comprises a top cover, an injector and a combustion chamber which are sequentially connected from right to left, wherein the injector is clamped between the top cover and the combustion chamber, and the tail end of the combustion chamber is connected with a fire transmission rod; a hydrogen inlet is formed in the top cover, and a hydrogen nozzle is inserted into the hydrogen inlet and is fixed on the top cover in a thread matching mode; the injector is connected with an air inlet; the combustion chamber is provided with spark plug mounting seats which are vertically symmetrical, each spark plug mounting seat is respectively connected with a spark plug through threads, and the spark plug is externally connected with an ignition cabinet. The centrifugal air-hydrogen torch igniter adopts the centrifugal nozzle, so that the mixing of air and hydrogen is enhanced, and reliable ignition can be realized; the gas temperature is controlled by controlling the equivalence ratio of air and hydrogen, so that the working time of the torch igniter is prolonged, and the long-time work and repeated work of the torch igniter are realized.
Description
Technical Field
The invention belongs to the technical field of combustion and ignition, and particularly relates to a centrifugal air-hydrogen torch igniter.
Background
The torch igniter has the advantages of high ignition reliability, reusability, convenient use and the like, and is an ignition device widely applied to liquid rocket engines and combustion air heaters. Torch igniters typically use gaseous or liquid fuels, typically hydrogen, methane, etc., and most of the latter are alcohols, coal oils, etc.
Hydrogen is a common gaseous fuel for torch igniters. The torch igniter generally requires small volume, simple structure and high ignition energy. The heat value of the hydrogen is high, the temperature can reach more than 2000K when the hydrogen is properly mixed with air for combustion, and the energy is enough to be used as an ignition source of a liquid rocket engine and a combustion heater; and the hydrogen density is low, the required mass flow is small, and the requirement of a torch igniter can be met by a small hydrogen source and a supply pipeline, so that the hydrogen is very convenient to use as the fuel of the torch igniter.
In order to improve the ignition reliability of the torch igniter, and improve the ignition energy, the oxidant of the torch igniter can select oxygen. The oxidant selects oxygen, the injector can meet the requirement of reliable ignition without considering a complex configuration, but the flame temperature of combustion of oxygen and fuel is higher than 3000K, a torch igniter can only work for hundreds of milliseconds, and the successful ignition of a combustion device cannot be ensured due to the short working time; and the installation position of the torch igniter in the combustion device is usually narrow, and the addition of a cooling structure on the torch igniter is inconvenient. At the same time, oxygen is a very dangerous combustion-supporting gas, and the use of oxygen greatly increases the risk of the supply system.
If air is used as the oxidant, the temperature of the gas generated by the torch igniter can be controlled within 2000K, and the operating time of the torch igniter can be prolonged to 5s without taking cooling measures, which is enough to ensure the reliable ignition of the combustion device. However, the modes of coaxial injection, wall injection and the like cannot ensure that the gaseous fuel and the air are fully mixed; and the ignition temperature required by hydrogen is higher, and is generally higher than 500 ℃, so that the ignition of the air-hydrogen torch igniter is difficult, and the ignition stability is poor.
The liquid fuel torch igniter is of a gas-liquid coaxial centrifugal injection structure, and the centrifugal nozzle can enable the inner medium and the outer medium of the centrifugal nozzle to generate strong interaction, so that the mixing of the liquid fuel and the gas oxidant can be enhanced, the atomization effect is improved, and the reliable ignition and the full combustion of the liquid fuel are ensured. However, the combustion process involves complex processes of atomization, evaporation and blending, so that oscillation combustion is easy to generate, the equipment safety is greatly threatened, and the worldwide problem which is not solved up to now is solved.
In summary, although the torch igniter using oxygen as the oxidant has reliable ignition and high ignition energy, the torch igniter has short working time and high risk; the problems of ignition reliability and combustion stability of torch igniters using liquid fuels are difficult to solve. Currently, there is a need to develop a centrifugal air-hydrogen torch igniter.
Disclosure of Invention
The invention aims to solve the technical problem of providing a centrifugal air-hydrogen torch igniter, which solves the problem of mixing and burning gaseous fuel and air and can stably work for a long time.
The invention relates to a centrifugal air hydrogen torch igniter which is characterized by comprising a top cover, an injector and a combustion chamber which are sequentially connected from right to left, wherein the top cover and the combustion chamber are fixedly connected through a bolt assembly of a flange plate, the injector is clamped between the top cover and the combustion chamber, and the tail end of the combustion chamber is connected with a fire transmission rod; a hydrogen inlet is formed in the top cover, and a hydrogen nozzle is inserted into the hydrogen inlet and is fixed on the top cover in a thread matching mode; the injector is connected with an air inlet; the combustion chamber is provided with spark plug mounting seats which are vertically symmetrical, each spark plug mounting seat is respectively connected with a spark plug through threads, and the spark plug is externally connected with an ignition cabinet;
The fire transmission rod, the combustion chamber, the injector, the top cover, the hydrogen nozzle and the hydrogen inlet are the same as the horizontal central axis, and a horizontal airflow channel which is communicated left and right is arranged on the horizontal central axis; the air inlet is provided with a vertical central axis, and a vertical airflow channel which is vertically communicated is arranged on the vertical central axis;
The hydrogen nozzle is a pipe body, tangential holes uniformly distributed along the circumferential direction are formed in the right end of the hydrogen nozzle, and the left end of the hydrogen nozzle is inserted into the injector; the horizontal airflow channel on the central axis of the hydrogen nozzle is a hydrogen flow channel;
The injector is disc-shaped with a disc opening facing the top cover, and a disc cavity of the injector is communicated with the air inlet; the horizontal airflow channel on the central axis of the injector is an airflow channel which is communicated with the hydrogen channel left and right; the air pipeline is provided with air injection holes which are uniformly distributed along the circumferential direction; the bottom edge of the plate of the injector is provided with air film holes which are uniformly distributed along the circumferential direction;
The distance between the outlet of the air flow passage and the central axis of the spark plug is 1.0-1.2 times of the inner diameter of the combustion chamber;
The hydrogen flow channel is an equal-pass channel; the right end inlet and the middle section of the air flow channel are equal-channel passages, and the left end outlet is an expansion passage; the horizontal airflow channel of the fire transmission rod is a contraction channel, and the contraction channel is sequentially provided with a contraction section and an equal straight section from front to back;
High-pressure hydrogen enters a hydrogen flow channel from a hydrogen inlet through a tangential hole of a hydrogen nozzle to form hydrogen rotational flow, and the hydrogen rotational flow enters an air flow channel; high-pressure air enters the disc cavity from the air inlet through the vertical airflow channel, enters the air flow channel through the air injection hole and is mixed with hydrogen in a swirling manner to form combustible mixed gas, the combustible mixed gas is sprayed into the combustion chamber, the spark plug ignites the combustible mixed gas to form high-temperature fuel gas, and the high-temperature fuel gas is sprayed out through the contraction channel of the fire transmission rod; meanwhile, high-pressure air is sprayed out through the air film holes, a cooling film for cooling the combustion chamber is formed on the inner wall of the combustion chamber, and the temperature of the inner wall of the combustion chamber is reduced;
the centrifugal air hydrogen torch igniter inserts a flame transmission rod into a to-be-ignited combustion device, and is fixed on the to-be-ignited combustion device in a bolt connection mode through a flange plate at the tail end of a combustion chamber; the air-hydrogen equivalent ratio range of the centrifugal air-hydrogen torch igniter is 0.8-2.0, and the flame temperature range is 2000-2400K.
Further, the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the spark plug.
Further, the top cover and the injector are sealed by a copper pad, the injector and the combustion chamber are sealed by a copper pad, and the hydrogen nozzle and the top cover are sealed by a copper pad.
Further, the combustion chamber is made of stainless steel.
Further, the pressure range of the high-pressure air is 7-15 MPa, and the flow range is 90-200 g/s; the pressure range of the high-pressure hydrogen is 9-15 MPa, and the flow range is 2-10 g/s.
Further, the fire transmission rod material is a high-temperature alloy, and the brand of the fire transmission rod material is one of GH3128 or GH 3230.
Further, the fire transmission rod is fixed at the tail end of the combustion chamber in a welding mode, the spark plug mounting seat is fixed at the middle section of the combustion chamber in a welding mode, and the air inlet is fixed on the injector in a welding mode.
The high-pressure hydrogen of the centrifugal air hydrogen torch igniter disclosed by the invention enters the hydrogen nozzle and forms hydrogen swirling flow under the action of centrifugal force, and the hydrogen swirling flow has tangential velocity and axial velocity. After the high-pressure air enters the injector from the air inlet, a part of the high-pressure air enters the injector from the air injection hole and directly acts and is mixed with the hydrogen rotational flow at the outlet of the hydrogen nozzle; the hydrogen nozzle as the centrifugal nozzle enhances the mixing of high-pressure hydrogen and high-pressure air, forms combustible mixed gas in the combustion chamber, and reduces the requirement on ignition energy. The other part of high-pressure air enters the combustion chamber through the air film hole of the injector, a cooling film is formed on the inner wall of the combustion chamber, heat transfer between high-temperature fuel gas and the inner wall of the combustion chamber can be effectively reduced, and the combustion chamber can work for a long time without being ablated by adopting common stainless steel.
The spark plug of the centrifugal air hydrogen torch igniter is connected with the spark plug mounting seat through threads, so that the assembly and the disassembly are convenient; the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the ignition plug, and the ignition plug ignites the combustible mixed gas.
The combustion chamber of the centrifugal air hydrogen torch igniter is connected with a combustion device to be ignited through the flange plate bolt assembly, and the installation is convenient.
The flame transfer rod is welded at the tail end of the combustion chamber of the centrifugal air hydrogen torch igniter, the flame transfer rod is made of high-temperature alloy, and the flame transfer rod still has better structural strength without adopting other cooling structures under the condition that the working time of the torch igniter is not longer than 5 s. The shrink channel of passing the fire pole includes shrink section and straight section such as, and the design of shrink section can improve torch igniter combustion chamber room pressure, guarantees that high pressure hydrogen fully burns, promotes torch igniter combustion efficiency and gas outlet temperature homogeneity.
The hydrogen nozzle of the centrifugal air hydrogen torch igniter is a centrifugal nozzle, has excellent mixing effect, and enables the torch igniter to normally ignite and stably work within a wider air hydrogen equivalent ratio range (0.8-2.0); meanwhile, the flame temperature generated by the torch igniter is controlled to 2000-2400K, so that enough ignition energy is provided to ensure that the combustion device is ignited, and the flame temperature is prevented from being too high, and long-time work can be realized without considering a complex cooling structure.
The centrifugal air hydrogen torch igniter provided by the invention has the following characteristics:
1. the air hydrogen is adopted for ignition, so that the safety risk of a supply pipeline is reduced, and long-time work of about 5 seconds can be realized;
2. the mixing effect of the hydrogen and the air is enhanced by adopting the centrifugal nozzle, so that the ignition reliability is improved;
3. the combustion chamber is provided with a gas film cooling structure, a cooling gas film is formed on the wall surface of the combustion chamber, ablation is avoided, and the working time is prolonged;
4. Reliable ignition of the air hydrogen equivalent ratio within the range of 0.8-2.0 can be realized, and the working range is wide; flame temperature is controlled to 2000K-2400K, and temperature interval is proper;
5. the fire transmission rod is made of a high-temperature alloy material, so that the torch igniter can work for a long time;
6. The torch igniter has a simple structure, and the injector and the spark plug can be replaced; the torch igniter is connected with the device to be combusted through bolts, so that the device is convenient to disassemble and assemble;
7. The spark plug for igniting the torch igniter is a common civil product, and has strong universality, simplicity and reliability.
The centrifugal air-hydrogen torch igniter adopts the centrifugal nozzle, so that the mixing of air and hydrogen is enhanced, and reliable ignition can be realized; the gas temperature is controlled by controlling the equivalence ratio of air and hydrogen, so that the working time of the torch igniter is prolonged, and the long-time work and repeated work of the torch igniter are realized.
Drawings
FIG. 1 is a schematic diagram of a centrifugal air-hydrogen torch igniter of the present invention;
FIG. 2 is a schematic A-A cross-sectional view of a centrifugal air-hydrogen torch igniter of the invention;
FIG. 3a is a schematic view (front cross-sectional view) of a hydrogen nozzle in a centrifugal air-hydrogen torch igniter according to the present invention;
FIG. 3b is a schematic view (top cross-sectional view) of the hydrogen nozzle configuration in the centrifugal air-hydrogen torch igniter of the invention;
Fig. 4 is an enlarged partial view of an injector in a centrifugal air-hydrogen torch igniter of the invention.
In the figure, 1. A fire transmission rod; 2. a combustion chamber; 3. a spark plug mounting base; 4. an injector; 5. an air inlet; 6. a top cover; 7. a hydrogen gas nozzle; 8. a hydrogen inlet; 9. an air injection hole; 10. an air film hole; 11. tangential holes.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
As shown in fig. 1 and 2, the centrifugal air-hydrogen torch igniter comprises a top cover 6, an injector 4 and a combustion chamber 2 which are sequentially connected from right to left, wherein the top cover 6 and the combustion chamber 2 are fixedly connected through a bolt assembly of a flange plate, the injector 4 is clamped between the top cover 6 and the combustion chamber 2, and the tail end of the combustion chamber 2 is connected with a fire transmission rod 1; the top cover 6 is provided with a hydrogen inlet 8, and the hydrogen nozzle 7 is inserted into the hydrogen inlet 8 and is fixed on the top cover 6 in a thread matching mode; the injector 4 is connected with an air inlet 5; the combustion chamber 2 is provided with spark plug mounting seats 3 which are vertically symmetrical, the spark plugs are respectively mounted on the spark plug mounting seats 3 through threaded connection, and the spark plugs are externally connected with an ignition cabinet;
the fire transfer rod 1, the combustion chamber 2, the injector 4, the top cover 6, the hydrogen nozzle 7 and the hydrogen inlet 8 are the same as the horizontal central axis, and a horizontal airflow channel which is communicated left and right is arranged on the horizontal central axis; the air inlet 5 is provided with a vertical central axis, and a vertical airflow channel which is vertically communicated is arranged on the vertical central axis;
as shown in fig. 3a and 3b, the hydrogen nozzle 7 is a tube body, tangential holes 11 uniformly distributed along the circumferential direction are formed at the right end of the hydrogen nozzle 7, and the left end of the hydrogen nozzle 7 is inserted into the injector 4; the horizontal airflow channel on the central axis of the hydrogen nozzle 7 is a hydrogen flow channel;
As shown in fig. 2 and 4, the injector 4 is in a disc shape with a disc opening facing the top cover 6, and a disc cavity of the injector 4 is communicated with the air inlet 5; the horizontal airflow channel on the central axis of the injector 4 is an airflow channel which is communicated with the hydrogen channel left and right; the air pipeline is provided with air injection holes 9 which are uniformly distributed along the circumferential direction; the bottom edge of the plate of the injector 4 is provided with air film holes 10 which are uniformly distributed along the circumferential direction;
the distance between the outlet of the air flow passage and the central axis of the spark plug is 1.0-1.2 times of the inner diameter of the combustion chamber 2;
The hydrogen flow channel is an equal-pass channel; the right end inlet and the middle section of the air flow channel are equal-channel passages, and the left end outlet is an expansion passage; the horizontal airflow channel of the fire transmission rod 1 is a contraction channel, and the contraction channel is sequentially provided with a contraction section and an equal straight section from front to back;
High-pressure hydrogen enters a hydrogen flow passage from a hydrogen inlet 8 through a tangential hole 11 of a hydrogen nozzle 7 to form hydrogen rotational flow, and the hydrogen rotational flow enters an air flow passage; the high-pressure air enters the disc cavity from the air inlet 5 through the vertical airflow channel, enters the air flow channel through the air injection hole 9 and is mixed with hydrogen in a swirling manner to form combustible mixed gas, the combustible mixed gas is sprayed into the combustion chamber 2, the spark plug ignites the combustible mixed gas to form high-temperature fuel gas, and the high-temperature fuel gas is sprayed out through the contraction channel of the fire transmission rod 1; meanwhile, high-pressure air is sprayed out through the air film holes 10, a cooling film for cooling the combustion chamber 2 is formed on the inner wall of the combustion chamber 2, and the temperature of the inner wall of the combustion chamber 2 is reduced;
The centrifugal air hydrogen torch igniter inserts a flame transmission rod 1 into a to-be-ignited combustion device, and is fixed on the to-be-ignited combustion device in a bolt connection mode through a flange plate at the tail end of a combustion chamber 2; the air-hydrogen equivalent ratio range of the centrifugal air-hydrogen torch igniter is 0.8-2.0, and the flame temperature range is 2000-2400K.
Further, the ignition cabinet converts 220V alternating current into 10kV high voltage power and outputs the 10kV high voltage power to the spark plug.
Further, the top cover 6 is sealed with the injector 4 through a copper gasket, the injector 4 is sealed with the combustion chamber 2 through a copper gasket, and the hydrogen nozzle 7 is sealed with the top cover 6 through a copper gasket.
Further, the combustion chamber 2 is made of stainless steel.
Further, the pressure range of the high-pressure air is 7-15 MPa, and the flow range is 90-200 g/s; the pressure range of the high-pressure hydrogen is 9-15 MPa, and the flow range is 2-10 g/s.
Further, the material of the fire transmission rod 1 is a high-temperature alloy, and the brand is one of GH3128 or GH 3230.
Further, the fire transmission rod 1 is fixed at the tail end of the combustion chamber 2 in a welding mode, the spark plug mounting seat 3 is fixed at the middle section of the combustion chamber 2 in a welding mode, and the air inlet 5 is fixed on the injector 4 in a welding mode.
Example 1
The number of the air injection holes 9 is 8, and the inner diameter phi is 5mm; the number of the air film holes is 20, and the inner diameter phi is 1mm; the number of tangential holes (11) is 4.
Although the embodiments of the present invention have been disclosed above, it is not limited to the use listed in the specification and the embodiments, but it can be fully applied to various fields suitable for the present invention. Additional modifications and variations may readily be made by those skilled in the art without departing from the principles of the present invention, and the invention is not limited to the specific details and illustrations shown and described herein.
Claims (7)
1. The centrifugal air hydrogen torch igniter is characterized by comprising a top cover (6), an injector (4) and a combustion chamber (2) which are sequentially connected from right to left, wherein the top cover (6) and the combustion chamber (2) are fixedly connected through a bolt assembly of a flange plate, the injector (4) is clamped between the top cover (6) and the combustion chamber (2), and the tail end of the combustion chamber (2) is connected with a fire transmission rod (1); a hydrogen inlet (8) is formed in the top cover (6), and a hydrogen nozzle (7) is inserted into the hydrogen inlet (8) and is fixed on the top cover (6) in a thread matching mode; the injector (4) is connected with an air inlet (5); the combustion chamber (2) is provided with spark plug mounting seats (3) which are vertically symmetrical, the spark plugs are respectively mounted on the spark plug mounting seats (3) through threaded connection, and the spark plugs are externally connected with an ignition cabinet;
the fire transmission rod (1), the combustion chamber (2), the injector (4), the top cover (6), the hydrogen nozzle (7) and the hydrogen inlet (8) are the same as the horizontal central axis, and a horizontal airflow channel which is communicated left and right is arranged on the horizontal central axis; the air inlet (5) is provided with a vertical central axis, and a vertical airflow channel which is vertically communicated is arranged on the vertical central axis;
the hydrogen nozzle (7) is a pipe body, tangential holes (11) uniformly distributed along the circumferential direction are formed in the right end of the hydrogen nozzle (7), and the left end of the hydrogen nozzle (7) is inserted into the injector (4); the horizontal airflow channel on the central axis of the hydrogen nozzle (7) is a hydrogen flow channel;
The injector (4) is disc-shaped, the disc opening of which faces the top cover (6), and the disc cavity of the injector (4) is communicated with the air inlet (5); the horizontal airflow channel on the central axis of the injector (4) is an airflow channel which is communicated with the hydrogen channel left and right; the air pipeline is provided with air injection holes (9) which are uniformly distributed along the circumferential direction; the bottom edge of the plate of the injector (4) is provided with air film holes (10) which are uniformly distributed along the circumferential direction;
The distance between the outlet of the air flow passage and the central axis of the spark plug is 1.0-1.2 times of the inner diameter of the combustion chamber (2);
The hydrogen flow channel is an equal-pass channel; the right end inlet and the middle section of the air flow channel are equal-channel passages, and the left end outlet is an expansion passage; the horizontal airflow channel of the fire transmission rod (1) is a contraction channel, and the contraction channel is sequentially provided with a contraction section and an equal straight section from front to back;
High-pressure hydrogen enters a hydrogen flow passage from a hydrogen inlet (8) through a tangential hole (11) of a hydrogen nozzle (7) to form hydrogen rotational flow, and the hydrogen rotational flow enters an air flow passage; high-pressure air enters the disc cavity from the air inlet (5) through the vertical airflow channel, enters the air flow channel through the air injection hole (9) and is mixed with hydrogen in a cyclone way to form combustible mixed gas, the combustible mixed gas is sprayed into the combustion chamber (2), the spark plug ignites the combustible mixed gas to form high-temperature fuel gas, and the high-temperature fuel gas is sprayed out through the contraction channel of the fire transmission rod (1); meanwhile, high-pressure air is sprayed out through the air film holes (10), a cooling film for cooling the combustion chamber (2) is formed on the inner wall of the combustion chamber (2), and the temperature of the inner wall of the combustion chamber (2) is reduced;
The centrifugal air hydrogen torch igniter inserts a flame transmission rod (1) into a to-be-ignited combustion device, and is fixed on the to-be-ignited combustion device in a bolt connection mode through a flange at the tail end of a combustion chamber (2); the air-hydrogen equivalent ratio range of the centrifugal air-hydrogen torch igniter is 0.8-2.0, and the flame temperature range is 2000-2400K.
2. The centrifugal air-hydrogen torch igniter of claim 1 wherein the ignition cabinet converts 220V ac power to 10kV high voltage power for output to the spark plug.
3. The centrifugal air-hydrogen torch igniter of claim 1, wherein the top cover (6) and the injector (4) are sealed by a copper pad, the injector (4) and the combustion chamber (2) are sealed by a copper pad, and the hydrogen nozzle (7) and the top cover (6) are sealed by a copper pad.
4. A centrifugal air-hydrogen torch igniter as defined in claim 1 wherein said combustion chamber (2) is made of stainless steel.
5. The centrifugal air-hydrogen torch igniter of claim 1, wherein the pressure range of the high-pressure air is 7-15 mpa, and the flow range is 90-200 g/s; the pressure range of the high-pressure hydrogen is 9-15 MPa, and the flow range is 2-10 g/s.
6. The centrifugal air-hydrogen torch igniter of claim 1, wherein the material of the flame transfer rod (1) is a superalloy, and the brand is one of GH3128 or GH 3230.
7. The centrifugal air-hydrogen torch igniter of claim 1, wherein the flame transfer rod (1) is fixed at the tail end of the combustion chamber (2) in a welding mode, the spark plug mounting seat (3) is fixed at the middle section of the combustion chamber (2) in a welding mode, and the air inlet (5) is fixed on the injector (4) in a welding mode.
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