CN117189356A - Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine - Google Patents
Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine Download PDFInfo
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- CN117189356A CN117189356A CN202311364882.5A CN202311364882A CN117189356A CN 117189356 A CN117189356 A CN 117189356A CN 202311364882 A CN202311364882 A CN 202311364882A CN 117189356 A CN117189356 A CN 117189356A
- Authority
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- Prior art keywords
- hydrogen
- premixing
- air
- tube body
- jet hole
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 239000001257 hydrogen Substances 0.000 claims abstract description 138
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 138
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Gas Burners (AREA)
Abstract
The application relates to the technical field of hydrogen premixing, in particular to a premixing tube structure for preventing hydrogen overflow based on a hydrogen gas turbine. The premixing device comprises a premixing tube body, wherein a premixing cavity which is communicated from front to back is arranged in the premixing tube body, the front end and the rear end of the premixing tube body are respectively provided with an air inlet end and a premixing air outlet end, the air inlet end of the premixing tube body is provided with a sealing cover plate, and the air inlet end of the premixing tube body is sealed by the sealing cover plate; the side face of the air inlet end of the premixing tube body is provided with a hydrogen jet hole, the outer side of the hydrogen jet hole is provided with a hydrogen inlet tube, and the air outlet end of the hydrogen inlet tube extends into the hydrogen jet hole. According to the application, the pressure of the position opposite to the hydrogen jet hole is increased by arranging the anti-overflow cover plate, so that air enters the premixing cavity from the air jet hole positioned on the side wall of the premixing tube at a lower speed, and hydrogen is prevented from overflowing from the air jet hole positioned at the position; meanwhile, the hydrogen guide profile is arranged in the premixing cavity, so that radial hydrogen jet from the hydrogen jet hole can be guided to the axial direction in the premixing cavity, and the mixing effect is improved.
Description
Technical Field
The application relates to the technical field of hydrogen premixing, in particular to a premixing tube structure for preventing hydrogen overflow based on a hydrogen gas turbine.
Background
At present, the traditional fossil fuel has high carbon content and cannot meet the low-carbon emission requirement. The hydrogen is used as a novel green energy, the reaction product of the hydrogen and the oxygen is water or steam, and the hydrogen has the advantages of wide combustion adaptability, high heat value and zero carbon emission, and is a fuel with development potential, especially in the fields of aeroengines and ground gas turbines.
The hydrogen has the characteristics of low density, wide flammable boundary, high combustion speed and high flame temperature. In the traditional gas turbine combustion organization mode, in order to reduce NOx emission, a premixed combustion mode is adopted to reduce the highest temperature of a flame zone. If the traditional diffusion combustion mode is adopted, a large amount of NOx emission is generated, and the environmental protection requirement cannot be met. With the development of combustion technology using hydrogen as fuel, higher requirements are put on the premixing technology of hydrogen and air, and the importance of the rapid mixing technology of hydrogen and air is gradually highlighted. The uniform mixing of the high-speed hydrogen jet flow and the air is completed within a very short flowing distance, the uniform distribution of the outlet speed of the premixing container is ensured, the hydrogen is prevented from overflowing, and the method is a target to be realized by the rapid premixing technology of the hydrogen and the air.
Because of the low hydrogen density, small flow momentum and wide combustion boundary, the manner of using transverse hydrogen jet is difficult to mix the hydrogen and air completely and ensure no overflow in a shorter flow distance. The existing mixing structure of hydrogen and air has large volume, long mixing distance, poor mixing effect and easy overflow. If the flame is directly applied to the existing ground gas turbine or aeroengine using hydrogen as fuel, local equivalent ratio in flame can be high, local hot spots can occur, NOx emission is high, and the phenomenon of hydrogen overflow can possibly occur, so that explosion accidents can be caused.
Disclosure of Invention
Aiming at the defects in the prior art, the application provides a premix tube structure for preventing hydrogen from overflowing based on a hydrogen turbine, and the pressure of the position opposite to a hydrogen jet hole is increased by arranging an overflow preventing plate, so that air enters a premix cavity from the air jet hole on the side wall of the premix tube at a lower speed, and hydrogen is prevented from overflowing from the air jet hole at the position; meanwhile, the hydrogen guide profile is arranged in the premixing cavity, so that radial hydrogen jet from the hydrogen jet hole can be guided to the axial direction in the premixing cavity, and the mixing effect is improved.
The technical scheme adopted by the application is as follows:
the premixing tube structure for preventing hydrogen overflow based on the hydrogen gas turbine comprises a premixing tube body, wherein a premixing cavity which is communicated front and back is arranged in the premixing tube body, the front end and the back end of the premixing tube body are respectively provided with an air inlet end and a premixing air outlet end, the air inlet end of the premixing tube body is provided with a sealing cover plate, and the air inlet end of the premixing tube body is sealed by the sealing cover plate; the side surface of the air inlet end of the premixing tube body is provided with a hydrogen jet hole, the outer side of the hydrogen jet hole is provided with a hydrogen inlet tube, and the air outlet end of the hydrogen inlet tube extends into the hydrogen jet hole; the side surface of the air inlet end of the premixing tube body is provided with a plurality of air jet holes along the circumferential direction, and the air jet holes are positioned at the downstream of the hydrogen jet holes; an anti-overflow cover plate is arranged on one side, facing away from the hydrogen jet hole, of the air inlet end of the premixing tube body, and the anti-overflow cover plate covers the air jet hole arranged facing the hydrogen jet hole.
Further, the premixing tube body is of a cylindrical structure.
Further, the sealing cover plate and the premixing tube body are integrally formed.
Further, the upper end of the anti-overflow cover plate is connected with the upper end of the premixing tube body through an upper baffle plate which is horizontally arranged, and the lower end of the anti-overflow cover plate is connected with the side wall of the premixing tube body through a lower baffle plate which is horizontally arranged.
Further, a hydrogen flow guide profile is arranged at the position, facing the hydrogen jet hole, in the premixing cavity, the hydrogen flow guide profile is arranged on the inner side end face of the sealing cover plate, and the hydrogen flow guide profile can guide radial hydrogen jet flow coming from the hydrogen jet hole to the axial direction in the premixing cavity.
Further, the hydrogen guide profile is an arc end face.
Further, two side air jet holes are formed in the side face of the air inlet end of the premixing tube body, the two side air jet holes and the hydrogen jet hole are located on the same circumference, and the two side air jet holes are respectively formed in the left side and the right side of the hydrogen jet hole.
Further, the left side and the right side of the hydrogen guide profile are respectively provided with an air guide groove, the two air guide grooves are respectively communicated with the two side air jet holes in a one-to-one correspondence mode, and the air guide grooves can guide air jet entering the side air jet holes to the hydrogen guide profile.
Further, a shrinkage cavity is arranged in the pre-mixing air outlet end, and the cross section area of the shrinkage cavity is changed from large to small from the air inlet end to the air outlet end.
The beneficial effects of the application are as follows:
the application has compact and reasonable structure, and the pressure of the position opposite to the hydrogen jet hole is improved by arranging the anti-overflow cover plate, so that air enters the premixing cavity from the air jet hole positioned on the side wall of the premixing tube at a lower speed, and hydrogen is prevented from overflowing from the air jet hole at the position; meanwhile, a hydrogen guide molded surface is arranged in the premixing cavity, so that radial hydrogen jet from the hydrogen jet hole can be guided to the axial direction in the premixing cavity, and the mixing effect is improved; the shrinkage cavity provided by the application can rectify the mixed air flow, rectify the speed into uniform flow and spray out from the pre-mixed air outlet end; the air guide groove can guide the air jet flow entering from the side air jet hole to the hydrogen guide molded surface, so that the air jet flow and the hydrogen jet flow are mixed at the position of the hydrogen guide molded surface, and the mixing effect is improved.
Drawings
Fig. 1 is a front view of the present application.
Fig. 2 is a cross-sectional view A-A of fig. 1.
Fig. 3 is a front view of the present application after removing the hydrogen inlet pipe.
Fig. 4 is a sectional view of B-B in fig. 3.
Wherein: 1. premixing the pipe body; 2. a hydrogen inlet pipe; 3. a hydrogen jet hole; 4. side air jet holes; 5. an air jet hole; 6. an anti-overflow cover plate; 7. a hydrogen gas diversion profile; 8. an air guide groove; 9. sealing the cover plate; 10. a shrink chamber; 11. premixing an air outlet end; 12. an upper baffle; 13. and a lower baffle.
Detailed Description
The following describes specific embodiments of the present application with reference to the drawings.
As shown in fig. 1 and 2, a premixing tube structure for preventing hydrogen overflow based on a hydrogen turbine comprises a premixing tube body 1 with a cylindrical structure, a premixing cavity which is communicated from front to back is arranged in the premixing tube body 1, an air inlet end and a premixing air outlet end 11 are respectively arranged at the front end and the rear end of the premixing tube body 1, a sealing cover plate 9 is arranged at the air inlet end of the premixing tube body 1, the sealing cover plate 9 seals the air inlet end of the premixing tube body 1, and the sealing cover plate 9 and the premixing tube body 1 are integrally formed.
As shown in fig. 1 and 2, a circular hydrogen jet hole 3 is arranged on the side surface of the air inlet end of the premixing tube body 1, a hydrogen inlet tube 2 is arranged on the outer side of the hydrogen jet hole 3, and the air outlet end of the hydrogen inlet tube 2 extends into the hydrogen jet hole 3 and can radially jet hydrogen into the premixing cavity.
As shown in fig. 1 and 2, two long kidney-shaped side air jet holes 4 are formed in the side surface of the air inlet end of the premixing tube body 1, the two side air jet holes 4 and the hydrogen jet hole 3 are located on the same circumference, and the two side air jet holes 4 are respectively formed in the left side and the right side of the hydrogen jet hole 3.
As shown in fig. 1 and 2, a plurality of circular air jet holes 5 are formed in the circumferential direction on the side surface of the air inlet end of the premix tube body 1, and the plurality of air jet holes 5 are located downstream of the hydrogen jet holes 3.
As shown in fig. 2 and 3, an arc-shaped overflow preventing cover plate 6 is arranged at one side of the air inlet end of the premixing tube body 1, which is opposite to the hydrogen jet hole 3, and the overflow preventing cover plate 6 covers the air jet hole 5 arranged facing the hydrogen jet hole 3, and hydrogen is easy to overflow from the position because of lower pressure at the position, so that the overflow preventing cover plate 6 is arranged at the position to prevent the hydrogen jet in the hydrogen jet hole 3 from overflowing from the air jet hole 5 arranged opposite to the hydrogen jet hole 3. The upper end of the anti-overflow cover plate 6 is connected with the upper end of the premixing tube body 1 through an upper baffle plate 12 which is horizontally arranged, and the lower end of the anti-overflow cover plate 6 is connected with the side wall of the premixing tube body 1 through a lower baffle plate 13 which is horizontally arranged. In use, outside air enters the side air jet holes 4 and the air jet holes 5 provided facing the hydrogen jet holes 3 through the space between the overflow preventing plate 6 and the outer side wall of the premix tube body 1.
As shown in fig. 2 and fig. 4, a hydrogen flow guiding profile 7 is arranged at the position facing the hydrogen jet hole 3 in the premixing cavity, the hydrogen flow guiding profile 7 is arranged at the inner side end surface of the sealing cover plate 9, and the hydrogen flow guiding profile 7 can guide radial hydrogen jet from the hydrogen jet hole 3 to the axial direction in the premixing cavity and mix with air jet entering the side air jet hole 4 and the air jet hole 5.
As shown in fig. 2 and 4, the hydrogen diversion profile 7 is an arc end surface, and the arc end surface can make the hydrogen jet flow turn more stable.
As shown in fig. 2 and fig. 4, air guide grooves 8 are respectively arranged on the left side and the right side of the hydrogen guide profile 7, the two air guide grooves 8 are respectively communicated with the two side air jet holes 4 in a one-to-one correspondence manner, and the air guide grooves 8 can guide air jet streams entering the side air jet holes 4 onto the hydrogen guide profile 7, so that the air jet streams and the hydrogen jet streams are mixed at the position of the hydrogen guide profile 7.
As shown in fig. 2, a contraction cavity 10 is arranged in the pre-mixing air outlet end 11, the cross-sectional area of the contraction cavity 10 is reduced from the air inlet end to the air outlet end, the contraction cavity 10 can rectify the mixed air flow, rectify the speed into uniform flow, and spray out from the pre-mixing air outlet end 11.
The working principle of the application is as follows: when the device is used, the mixing process of hydrogen and air mainly occurs in the premixing cavity, and the hydrogen is radially injected into the premixing cavity from the side surface of the premixing tube body 1 at a high speed through the hydrogen inlet tube 2. The anti-overflow cover plate 6 can increase the pressure of the position facing away from the hydrogen jet hole 3, so that air enters the premixing cavity from the air jet hole 5 positioned on the side wall of the premixing tube at a lower speed, and the hydrogen is ensured not to overflow from the air jet hole 5 at the position. The hydrogen and air are rapidly mixed in the premixing cavity through mass exchange and momentum exchange. The mixed premixed gas is subjected to rectification action of the contraction cavity 10, the speed is rectified into uniform flow, and the uniform flow is sprayed out from the premixed gas outlet end 11 coaxial with the premixed pipe. The premixing pipes can be arranged according to a certain rule to form a pipe bundle, so that larger flow of the premixing air is realized.
The above description is intended to illustrate the application and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the application.
Claims (9)
1. The utility model provides a prevent excessive premix tube structure of hydrogen based on hydrogen gas turbine, includes premix body (1), its characterized in that: the premixing device comprises a premixing tube body (1), wherein a premixing cavity which is communicated front and back is arranged in the premixing tube body (1), the front end and the back end of the premixing tube body (1) are respectively provided with an air inlet end and a premixing air outlet end (11), the air inlet end of the premixing tube body (1) is provided with a sealing cover plate (9), and the air inlet end of the premixing tube body (1) is sealed by the sealing cover plate (9); the side surface of the air inlet end of the premixing tube body (1) is provided with a hydrogen jet hole (3), the outer side of the hydrogen jet hole (3) is provided with a hydrogen inlet tube (2), and the air outlet end of the hydrogen inlet tube (2) extends into the hydrogen jet hole (3); the side surface of the air inlet end of the premixing tube body (1) is provided with a plurality of air jet holes (5) along the circumferential direction, and the air jet holes (5) are positioned at the downstream of the hydrogen jet holes (3); an anti-overflow cover plate (6) is arranged at one side of the air inlet end of the premixing tube body (1) back to the hydrogen jet hole (3), and the anti-overflow cover plate (6) covers the air jet hole (5) arranged facing the hydrogen jet hole (3).
2. The premix tube structure for preventing hydrogen overflow based on the hydrogen turbine as recited in claim 1, wherein: the premixing tube body (1) is of a cylindrical structure.
3. The premix tube structure for preventing hydrogen overflow based on the hydrogen turbine as claimed in claim 2, wherein: the sealing cover plate (9) and the premixing tube body (1) are integrally formed.
4. A premix tube structure for preventing hydrogen overflow based on a hydrogen gas turbine as claimed in claim 3, wherein: the upper end of the anti-overflow cover plate (6) is connected with the upper end of the premixing tube body (1) through an upper baffle plate (12) which is horizontally arranged, and the lower end of the anti-overflow cover plate (6) is connected with the side wall of the premixing tube body (1) through a lower baffle plate (13) which is horizontally arranged.
5. The premix tube structure for preventing hydrogen overflow based on the hydrogen turbine as claimed in claim 4, wherein: the hydrogen jet flow guiding device is characterized in that a hydrogen guide molded surface (7) is arranged at the position, facing the hydrogen jet hole (3), of the premixing cavity, the hydrogen guide molded surface (7) is arranged on the inner side end surface of the sealing cover plate (9), and the hydrogen guide molded surface (7) can guide radial hydrogen jet flow coming from the hydrogen jet hole (3) to the axial direction in the premixing cavity.
6. The premix tube structure for preventing hydrogen overflow based on the hydrogen turbine as recited in claim 5, wherein: the hydrogen guide profile (7) is an arc end face.
7. The premix tube structure for preventing hydrogen overflow based on the hydrogen turbine as recited in claim 6, wherein: two side air jet holes (4) are formed in the side face of the air inlet end of the premixing tube body (1), the two side air jet holes (4) and the hydrogen jet hole (3) are located on the same circumference, and the two side air jet holes (4) are respectively formed in the left side and the right side of the hydrogen jet hole (3).
8. The premix tube structure for preventing hydrogen overflow based on a hydrogen turbine as recited in claim 7, wherein: the hydrogen gas guide profile (7) left and right sides set up air guide groove (8) respectively, and two air guide grooves (8) communicate with two side air jet holes (4) one-to-one respectively, and air guide groove (8) can be with the air jet direction hydrogen gas guide profile (7) that side air jet hole (4) got into.
9. The premix tube structure for preventing hydrogen overflow based on the hydrogen turbine as recited in claim 8, wherein: a shrinkage cavity (10) is arranged in the pre-mixing air outlet end (11), and the cross section area of the shrinkage cavity (10) is changed from large to small from the air inlet end to the air outlet end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311364882.5A CN117189356B (en) | 2023-10-20 | 2023-10-20 | Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311364882.5A CN117189356B (en) | 2023-10-20 | 2023-10-20 | Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117189356A true CN117189356A (en) | 2023-12-08 |
| CN117189356B CN117189356B (en) | 2024-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311364882.5A Active CN117189356B (en) | 2023-10-20 | 2023-10-20 | Hydrogen-overflow-preventing premixing pipe structure based on hydrogen gas turbine |
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| Country | Link |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315540A (en) * | 2014-09-26 | 2015-01-28 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Premixing fuel spray nozzle of combustion chamber of gas turbine |
| CN204717741U (en) * | 2015-04-16 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas-turbine combustion chamber head construction |
| CN107013912A (en) * | 2017-05-31 | 2017-08-04 | 深圳智慧能源技术有限公司 | From cooling injection type burner |
| CN111878811A (en) * | 2020-08-04 | 2020-11-03 | 刘根 | Three-return-stroke vertical gas boiler |
| CN115823744A (en) * | 2023-02-23 | 2023-03-21 | 中国矿业大学 | Plasma-excited wide-temperature-range combustion type air heating device and method |
-
2023
- 2023-10-20 CN CN202311364882.5A patent/CN117189356B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315540A (en) * | 2014-09-26 | 2015-01-28 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Premixing fuel spray nozzle of combustion chamber of gas turbine |
| CN204717741U (en) * | 2015-04-16 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas-turbine combustion chamber head construction |
| CN107013912A (en) * | 2017-05-31 | 2017-08-04 | 深圳智慧能源技术有限公司 | From cooling injection type burner |
| CN111878811A (en) * | 2020-08-04 | 2020-11-03 | 刘根 | Three-return-stroke vertical gas boiler |
| CN115823744A (en) * | 2023-02-23 | 2023-03-21 | 中国矿业大学 | Plasma-excited wide-temperature-range combustion type air heating device and method |
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| Publication number | Publication date |
|---|---|
| CN117189356B (en) | 2024-07-23 |
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