CN116481053B - Hydrogen-rich fuel combustion nozzle, head combustor and combustion chamber - Google Patents
Hydrogen-rich fuel combustion nozzle, head combustor and combustion chamber Download PDFInfo
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- CN116481053B CN116481053B CN202310307527.8A CN202310307527A CN116481053B CN 116481053 B CN116481053 B CN 116481053B CN 202310307527 A CN202310307527 A CN 202310307527A CN 116481053 B CN116481053 B CN 116481053B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 168
- 239000000446 fuel Substances 0.000 title claims abstract description 121
- 239000001257 hydrogen Substances 0.000 title claims abstract description 26
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 26
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000009792 diffusion process Methods 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 239000007921 spray Substances 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 60
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/286—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply having fuel-air premixing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
- F23R3/04—Air inlet arrangements
- F23R3/10—Air inlet arrangements for primary air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/283—Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/44—Combustion chambers comprising a single tubular flame tube within a tubular casing
-
- 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)
Abstract
The invention provides a hydrogen-rich fuel combustion nozzle, a head combustor and a combustion chamber, which relate to the technical field of industrial combustors and comprise a combustion unit fixing plate, a plurality of circumferential combustion units and a central combustion unit, wherein the circumferential combustion units and the central combustion unit are distributed on the combustion unit fixing plate, the circumferential combustion units are circumferentially distributed around the central combustion unit, the circumferential combustion units are provided with air grooves and fuel holes penetrating through the combustion unit fixing plate, the air grooves are used for introducing air and forming a circumferential backflow area on the surface of the combustion unit fixing plate, the fuel holes are used for introducing fuel and performing diffusion combustion, the central combustion unit comprises a fuel channel and an air channel, the air channel is used for introducing air and forming a central backflow area on the surface of the combustion unit fixing plate, and the fuel channel is used for introducing fuel and performing diffusion combustion. The invention avoids the emission of carbon dioxide, miniaturizes the combustion area by using micro-mixed combustion technology, and simultaneously reduces the emission of nitrogen oxides.
Description
Technical Field
The invention relates to the technical field of industrial combustors, in particular to a hydrogen-rich fuel combustion nozzle, a head combustor and a combustion chamber.
Background
The gas turbine is a power device capable of converting chemical energy of fuel into mechanical energy, and has wide application in aerospace, ship traffic, petrochemical industry and energy and power. Currently, the main fuel of a gas turbine is hydrocarbon fuel, such as natural gas, and the main emissions are nitrogen oxides and carbon dioxide, wherein the nitrogen oxides are defined as pollutants, and the emission amount of the nitrogen oxides is clearly specified in pollutant emission standards of various countries. Accordingly, each gas turbine manufacturer is working to reduce emissions of nitrogen oxides.
There are currently two main measures to reduce the formation of nitrogen oxides, ① to enhance the mixing process of fuel and air, reduce the maximum temperature in the reaction zone, ② to reduce the residence time of fuel and air in the hot flame zone. Modern gas turbines are almost exclusively based on lean premixed combustion technology, which exploits the principle of enhancing the mixing process to reduce the maximum temperature in the reaction zone, to develop combustors that meet the nitrogen oxide emissions requirements, forming dry low nitrogen oxide emissions (DLN) combustors for current mainstream applications.
Nitrogen oxides are formed because air itself contains nitrogen and reacts with oxygen at high temperatures to form nitrogen oxides. Thus, when hydrogen fuel is used, the combustion chamber also produces nitrogen oxide pollutants, and it is also necessary to control the amount of nitrogen oxide emissions during combustion. The combustion characteristics of hydrogen fuel and natural gas are greatly different, and DLN combustion technology cannot be directly applied, namely, the flame speed of hydrogen is nearly an order of magnitude higher than that of natural gas (the maximum laminar flame speed of hydrogen is 291cm/s and the maximum laminar flame speed of methane is 37 cm/s), so that under the same conditions, a premixing DLN nozzle using hydrogen needs higher flow speed to prevent flashback and avoid hardware damage.
In this context, micro-hybrid hydrogen combustion technology has evolved. The principle of micro-mixed hydrogen combustion technology is that a combustion reaction zone is miniaturized to generate a plurality of micro-diffusion small flames, so that the residence time of fuel and air in a hot flame zone is reduced, and the emission of nitrogen oxides is obviously reduced. This principle has two advantages, ① preventing flashback, ensuring part safety and operational stability, ② low emission of nitrogen oxides due to the short residence time of reactants in the micro-flame zone.
Chinese patent application number CN201810409372.8 discloses a micromixing nozzle for gas turbine, including fuel chamber, prerotation subassembly and micromixing tube, the prerotation subassembly runs through the fuel chamber sets up, the prerotation subassembly includes inner tube, outer tube and cyclone, the outer tube with form annular channel between the inner tube, the inner tube is equipped with first hole, the outer tube is equipped with the second hole, micromixing tube establishes in the fuel chamber, micromixing tube is equipped with the third hole, wherein, a portion of fuel in the annular channel gets into the interior intraductal air prerotation of inner tube through first hole and mixes, another portion of fuel that discharges from the second hole gets into micromixing tube through the third hole and mixes with the interior air of micromixing tube.
The patent designs a combustion chamber for burning hydrogen fuel, which avoids carbon dioxide emission, and uses micro-mixed hydrogen combustion technology to miniaturize the combustion area and reduce nitrogen oxide emission.
Disclosure of Invention
Based on the above problems, the invention aims to overcome the defects of the prior art and provide a hydrogen-rich fuel combustion nozzle, a head burner and a combustion chamber.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The hydrogen-rich fuel combustion nozzle comprises a combustion unit fixing plate, a plurality of circumferential combustion units and a central combustion unit, wherein the circumferential combustion units and the central combustion unit are distributed on the combustion unit fixing plate;
The circumferential combustion unit is provided with an air groove and a fuel hole which penetrate through the combustion unit fixing plate, and the air groove is used for introducing air and forming a circumferential backflow area on the surface of the combustion unit fixing plate;
The central combustion unit comprises a fuel passage and an air passage for introducing air and forming a central recirculation zone at the surface of the combustion unit fixing plate.
Preferably, the circumferential combustion unit is provided with a plurality of fuel holes, the fuel holes are arranged in a column, and the fuel holes and the central combustion unit are arranged on the same straight line.
Preferably, the air grooves comprise an inner air groove and an outer air groove which are respectively arranged on the upper side and the lower side of the fuel hole, and the inner air groove and the outer air groove are rectangular grooves.
Preferably, the air channels comprise an inner ring air channel and an outer ring air channel, and the inner ring air channel, the fuel channel and the outer ring air channel are all annular and distributed sequentially from inside to outside.
Preferably, the end wall surface of the inner ring air channel is enlarged into a cone shape and seals the end of the fuel channel, the end wall surface of the outer ring air channel is enlarged into a cone shape, fuel spray holes are circumferentially distributed on the outer wall of the fuel channel, and fuel in the fuel channel is sprayed from the fuel spray holes and the spraying direction is perpendicular to the fuel channel.
Preferably, the tail end of the outer ring air channel is provided with an outer ring swirl vane, and the position of the fuel spray hole is positioned at the downstream of the outer ring swirl vane.
Preferably, the inner ring air channel is provided with a central guide rod, and inner ring swirl vanes are arranged between the central guide rod and the wall surface of the inner ring air channel.
Preferably, the shape of the combustion unit fixing plate is at least one of a circle, a triangle, and a regular polygon.
The invention also provides a head burner which is formed by arranging a plurality of combustion nozzles, wherein the combustion nozzles are arranged on the combustion nozzle fixing plate.
The invention also provides a combustion chamber which comprises the head combustor, a casing, an end cover, a flame tube and an igniter, wherein the flame tube comprises a rectifying section, a combustion section, a contraction section and a rear section, and the head combustor is arranged in the upstream area of the combustion section.
Compared with the prior art, the invention has the following advantages:
The invention designs a combustion nozzle, each combustion nozzle comprises a fuel unit fixing plate, a central combustion unit and a plurality of circumferential combustion units, wherein the circumferential combustion units are distributed around the central combustion unit in a circumferential manner, each circumferential combustion unit is provided with an air groove and a fuel hole, the air grooves penetrate through the combustion unit fixing plate, the air grooves are used for introducing air and forming a circumferential backflow area on the surface of the combustion unit fixing plate, the fuel holes are used for introducing fuel and performing diffusion combustion, and the fuel enters a combustion area from the fuel holes through a fuel channel and is not premixed with the air for diffusion combustion. The central combustion unit comprises a fuel channel and an air channel, wherein the air channel is used for introducing air and forming a central backflow area on the surface of the combustion unit fixing plate, and the fuel channel is used for introducing fuel and performing diffusion combustion. The fuel and the air react in the combustion area, the flame is positioned on the shear layer of the inner reflux area and the outer reflux area, the fuel and the air are mixed and directly enter the combustion flame area and do not enter the reflux area, so the residence time of the fuel and air mixture in the flame area is very short, and the emission amount of nitrogen oxides is low. The burner is mainly used for burning hydrogen-rich or pure hydrogen fuel, avoiding carbon dioxide emission, and miniaturizing the burning area by using micro-mixing burning technology, and simultaneously reducing nitrogen oxide emission.
Drawings
FIG. 1 is a schematic view of a combustion nozzle in accordance with the present invention;
FIG. 2 is a schematic view of the structure of the circumferential combustion unit of the present invention;
FIG. 3 is a schematic illustration of the flame zone formed by the circumferential combustion unit of the present invention;
FIG. 4 is a schematic view of the structure of the central combustion unit of the present invention;
FIG. 5 is a partial schematic view of a central combustion unit for a fuel injection hole in accordance with the present invention;
FIG. 6 is a schematic illustration of the flame zone formed by the central combustion unit of the present invention;
FIG. 7 is a schematic view of the structure of the head burner of the present invention;
FIG. 8 is a schematic view of the structure of the combustion chamber of the present invention;
fig. 9 is a schematic view of a structure of a head burner according to a second embodiment of the present invention;
fig. 10 is a schematic diagram of the distribution of the circumferential combustion units according to the third embodiment of the present invention.
Reference numerals:
1-combustion nozzle, 101-circumferential flame zone, 102-circumferential outer recirculation zone, 103-circumferential inner recirculation zone;
104-a central flame zone, 105-a central outer reflux zone, 106-a central inner reflux zone;
2-a combustion unit fixing plate;
3-circumferential combustion units, 301-outer air slots, 302-fuel holes, 303-inner air slots;
4-center combustion unit, 401-fuel passage, 402-outer ring air passage, 403-inner ring air passage;
404-central combustion unit wall, 405-conical outlet ring, 406-fuel nozzle, 407-central deflector rod;
408-outer ring swirl blades and 409-inner ring swirl blades;
5-head burner, 6-combustion nozzle fixing plate, 7-casing, 8-flame tube, 9-fuel tube and 10-rectifying hole;
11-igniter.
Detailed Description
In order to make the purpose and technical solution of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in connection with the embodiments of the present invention.
In the description of the present application, it should be understood that the terms "orientation" or "positional relationship" as used herein are merely for convenience of description and to simplify the description of the present application, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Example 1
Fig. 1-6 show schematic structural views of combustion nozzles 1, which are mainly used for the combustion of hydrogen-rich fuel, wherein each combustion nozzle 1 comprises a fuel unit fixing plate, a central combustion unit 4 and a plurality of circumferential combustion units 3. Each of the circumferential combustion unit (3) and the central combustion unit (4) is a separate combustion reaction zone. The circumferential combustion units 3 are distributed circumferentially around said central combustion unit 4.
The circumferential combustion unit 3 structure includes an inner air groove 303, a fuel hole 302 and an outer air groove 301 penetrating the combustion unit fixing plate 2. The inner air groove 303 and the outer air groove 301 are rectangular grooves having the same shape. The fuel holes 302 are located between the inner air groove 303 and the outer air groove 301, and are a plurality of circular channels, and the distances between adjacent fuel holes 302 are equal. The fuel holes 302 are arranged in a row, and the fuel holes 302 are arranged on the same line as the central combustion unit 4. The inner air groove 303 and the outer air groove 301 are provided on both sides of the fuel hole 302.
The combustion operation principle of the circumferential combustion unit 3 is shown in fig. 3, in which air enters the combustion zone from the inner air groove 303 channel and the outer air groove 301 channel, and the inner recirculation zone and the outer recirculation zone are formed on the wall surface. Fuel enters the combustion zone from the fuel holes 302, is not premixed with the outer ring air, and is diffusion combusted. The fuel and the air react in the combustion area, the flame is positioned on the shearing layers of the circumferential outer reflux area 102 and the circumferential inner reflux area 103, the fuel-air mixture directly enters the circumferential flame area 101 through the shearing layers and does not enter the circumferential outer reflux area 102 and the circumferential inner reflux area 103 at the two sides, so that the residence time of the fuel-air mixture in the flame area is short, and the emission amount of nitrogen oxides is low.
The central combustion unit 4 is structured as shown in fig. 4 to 6, and includes an inner ring air passage 403, a fuel passage 401, and an outer ring air passage 402. The inner ring air passage 403, the fuel passage 401, and the outer ring air passage 402 are all annular and distributed in order from the inside to the outside.
The inner ring air channel 403 is composed of a central guide rod 407, inner ring swirl blades 409 and a conical outlet ring 405, wherein the inner side of the end of the conical outlet ring 405 is of an expanded conical structure and seals the end of the fuel channel 401, and air enters a combustion area from a head channel through the axial swirl blades, and forms a central inner reflux zone 106 under the guidance of the conical structure.
The outer ring air passage 402 is formed by a conical outlet collar 405, outer ring swirl vanes 408 and a central combustion unit wall 404, and air enters the combustion zone from the head passage, passes through the outer ring swirl vanes 408 and is directed by the conical configuration of the wall to form the central outer recirculation zone 105.
The combustion principle of the central combustion unit 3 is shown in fig. 6, that is, fuel enters a combustion area through a fuel loop and a flow channel inside a conical outlet ring 405 from a fuel spray hole 406, the fuel spray hole and an outer ring air flow channel form vertical jet flow, a hole is arranged at the downstream of the outer ring air flow channel, a premixing channel is not formed between the hole and the outer ring air, and diffusion combustion is realized. The number of fuel injection holes, the number of inner ring swirl vanes 409 and the number of outer ring swirl vanes 408 are the same, and the fuel injection holes 406 are located between the two outer ring swirl vanes 408 in the circumferential direction.
After being vertically injected through the fuel injection hole, the fuel is mixed with part of the outer ring air, and is separated from the central outer reflux zone 105 through the shear layer of the central outer reflux zone 105 and enters the central flame zone 104, so that the residence time of the fuel-air mixture in the flame zone is short, and the emission of nitrogen oxides is low. In order to ensure that the fuel-air mixture does not enter the outer recirculation zone, a critical depth of fuel injection is calculated, below which the fuel-air mixture can pass through the shear layer directly into the combustion flame zone.
To avoid merging of the individual flames at circumferential locations to form a large flame reaction zone, the reaction time is increased and the number of circumferential fuel holes 302 is not more than 8.
Based on the above-mentioned combustion nozzle 1, this patent devised a head burner 5, as shown in fig. 7, which is composed of a plurality of combustion nozzles 1 arranged in combination and fixed on a combustion nozzle fixing plate 6. For convenience of arrangement, the shape of the combustion unit fixing plate 2 is at least one of a circle, a triangle, and a regular polygon.
Based on the head burner 5, as shown in fig. 8, the present patent designs a combustion chamber including a casing 7, an end cover, the head burner 5, a flame tube 8 and an igniter 11. Wherein, flame tube 8 and receiver 7, end cover and receiver 7, combustor and flame tube 8 all pass through bolted connection. The flame tube 8 comprises a rectifying section, a combustion section, a contraction section and a rear section, and the head burner 5 is installed in an upstream area of the combustion section.
The flame tube 8 comprises a contracted section, and an igniter 11 is mounted on the contracted section, wherein the axis of the igniter 11 and the central axis of the combustion chamber form an acute angle.
A longitudinal section of the combustion chamber is shown in FIG. 8. Air flows in from the annular channel between the flame tube 8 and the casing 7 and enters the flame tube 8 through the rectifying holes 10 on the flame tube 8. A certain distance is reserved between the rectifying hole 10 and the burner, so that uniformity of air entering each combustion unit of the burner is ensured. The combustion chamber has a plurality of fuel passages 401, and fuel holes 302 for fuel are arranged in the end cover. Each fuel path enters each combustion unit through the fuel pipe 9, and then enters the flame tube 8 through the fuel holes 302 of each combustion unit, so that combustion reaction occurs.
During the load-up of the combustion engine, it is necessary to gradually increase the fuel amount. Based on the microminiaturization characteristic of the structure, in order to not change the anchoring position of the hydrogen fuel flame in the load lifting process, the emission in the load lifting process is reduced, a control strategy of controlling the fuel flow in a zoning mode is adopted, in the load lifting process, firstly, fuel is introduced into the central combustion nozzle 1, then, the fuel is introduced into the peripheral combustion nozzle 1 according to the load demand, the whole load lifting process of the fuel engine is completed, and the emission of nitrogen oxides in the load lifting process is controlled.
Example two
The present embodiment is similar to the first embodiment, and differs from the first embodiment in that:
as shown in fig. 9, the combustion nozzles 1 may also be applied in annular combustors, one individual burner per combustion nozzle 1.
Example III
The present embodiment is similar to the first embodiment, and differs from the first embodiment in that:
as shown in fig. 10, the circumferential combustion unit 3 may be designed as a crescent arc combustion unit, wherein the central angle corresponding to the arc is delta, so as to adapt to the installation requirements of different nozzles.
The foregoing is a description of embodiments of the invention, which are specific and detailed, but are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (8)
1. A hydrogen-rich fuel combustion nozzle, characterized by:
The combustion device comprises a combustion unit fixing plate, a plurality of circumferential combustion units and a central combustion unit, wherein the circumferential combustion units and the central combustion unit are distributed on the combustion unit fixing plate;
The circumferential combustion unit is provided with an air groove and a fuel hole penetrating through the combustion unit fixing plate, the air groove is used for introducing air and forming a circumferential backflow area on the surface of the combustion unit fixing plate, and the fuel hole is used for introducing fuel and performing diffusion combustion;
the central combustion unit comprises a fuel channel and an air channel, the air channel is used for introducing air and forming a central backflow area on the surface of the combustion unit fixing plate, and the fuel channel is used for introducing fuel and performing diffusion combustion;
The circumferential combustion unit is provided with a plurality of fuel holes, the fuel holes are arranged in a column shape, and the fuel holes and the central combustion unit are arranged on the same straight line;
the air grooves comprise inner air grooves and outer air grooves which are respectively arranged on the upper side and the lower side of the fuel hole, and the inner air grooves and the outer air grooves are rectangular grooves.
2. A hydrogen-enriched fuel combustion nozzle as claimed in claim 1, wherein:
In the central combustion unit, the air channels comprise an inner ring air channel and an outer ring air channel, and the inner ring air channel, the fuel channel and the outer ring air channel are all annular and distributed in sequence from inside to outside.
3. A hydrogen-enriched fuel combustion nozzle as claimed in claim 2, wherein:
the tail end wall surface of the inner ring air channel is enlarged into a cone shape and seals the tail end of the fuel channel, the tail end wall surface of the outer ring air channel is enlarged into a cone shape, fuel spray holes are circumferentially distributed on the outer wall of the fuel channel, and fuel in the fuel channel is sprayed out from the fuel spray holes, and the spraying direction is perpendicular to the fuel channel.
4. A hydrogen-enriched fuel combustion nozzle as claimed in claim 3, wherein:
the tail end of the outer ring air channel is provided with an outer ring swirl vane, and the position of the fuel spray hole is positioned at the downstream of the outer ring swirl vane.
5. A hydrogen-enriched fuel combustion nozzle as claimed in claim 3, wherein:
The inner ring air channel is provided with a central guide rod, and inner ring swirl vanes are arranged between the central guide rod and the wall surface of the inner ring air channel.
6. A hydrogen-enriched fuel combustion nozzle as claimed in claim 1, wherein:
the shape of the combustion unit fixing plate is at least one of a circle, a triangle and a regular polygon.
7. A head burner, characterized in that:
the head burner is formed by arranging a plurality of hydrogen-rich fuel combustion nozzles according to any one of claims 1 to 6, wherein the combustion nozzles are arranged on a combustion nozzle fixing plate.
8. A combustion chamber, characterized in that:
Comprising a head burner as claimed in claim 7, further comprising a casing, an end cap, a flame tube and an igniter, said flame tube comprising a rectifying section, a combustion section, a contracting section and a rear section, said head burner being mounted in an area upstream of said combustion section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307527.8A CN116481053B (en) | 2023-03-27 | 2023-03-27 | Hydrogen-rich fuel combustion nozzle, head combustor and combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310307527.8A CN116481053B (en) | 2023-03-27 | 2023-03-27 | Hydrogen-rich fuel combustion nozzle, head combustor and combustion chamber |
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| CN116481053A CN116481053A (en) | 2023-07-25 |
| CN116481053B true CN116481053B (en) | 2025-03-07 |
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| CN119267959A (en) * | 2024-11-11 | 2025-01-07 | 中国科学院工程热物理研究所 | A thermoacoustic oscillation passively controlled axially staged combustion chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345879A (en) * | 2010-07-30 | 2012-02-08 | 通用电气公司 | Fuel nozzle and assembly and gas turbine comprising the same |
| CN113137632A (en) * | 2021-05-13 | 2021-07-20 | 中国联合重型燃气轮机技术有限公司 | Premixing type on-duty fuel nozzle head, fuel nozzle and gas turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001280641A (en) * | 2000-03-31 | 2001-10-10 | Mitsubishi Heavy Ind Ltd | Gas turbine combustor, and method for mixing fuel and air in gas turbine combustor |
| JP5084847B2 (en) * | 2010-01-13 | 2012-11-28 | 株式会社日立製作所 | Gas turbine combustor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345879A (en) * | 2010-07-30 | 2012-02-08 | 通用电气公司 | Fuel nozzle and assembly and gas turbine comprising the same |
| CN113137632A (en) * | 2021-05-13 | 2021-07-20 | 中国联合重型燃气轮机技术有限公司 | Premixing type on-duty fuel nozzle head, fuel nozzle and gas turbine |
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| Publication number | Publication date |
|---|---|
| CN116481053A (en) | 2023-07-25 |
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