CN117267711A - Ammonia burner - Google Patents
Ammonia burner Download PDFInfo
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- CN117267711A CN117267711A CN202311394343.6A CN202311394343A CN117267711A CN 117267711 A CN117267711 A CN 117267711A CN 202311394343 A CN202311394343 A CN 202311394343A CN 117267711 A CN117267711 A CN 117267711A
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- Prior art keywords
- combustion
- ammonia
- cavity
- chamber
- shell
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 263
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 114
- 238000002485 combustion reaction Methods 0.000 claims abstract description 152
- 239000007789 gas Substances 0.000 claims abstract description 61
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 32
- 239000001257 hydrogen Substances 0.000 claims abstract description 32
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000003197 catalytic effect Effects 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000446 fuel Substances 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 10
- 150000002431 hydrogen Chemical class 0.000 claims description 8
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2214/00—Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention provides an ammonia burner, and relates to the technical field of burners. Comprising the following steps: the combustion chamber comprises a first combustion shell and a second combustion shell, a combustion cavity for combustion is formed in the first combustion shell, an ammonia heating cavity is formed in an annular cavity between the first combustion shell and the second combustion shell, and an ammonia air inlet is formed in the tail of the ammonia heating cavity; the third combustion casing is coaxially sleeved outside the second combustion casing, a high Wen Anqi decomposition cavity is formed in an annular cavity between the third combustion casing and the second combustion casing, an air introducing hole is formed in the second combustion casing and used for enabling high Wen Anqi in an ammonia heating cavity to enter the high Wen Anqi decomposition cavity, a catalytic structure is arranged in the high Wen Anqi decomposition cavity and used for enabling high Wen Anqi to be decomposed into nitrogen and hydrogen, an exhaust hole is formed in the tail section of the high Wen Anqi decomposition cavity, and the exhaust hole is communicated with the mixed gas inlet cavity. The ammonia burner provided by the invention can stably burn, and has the advantages of extremely low NOx emission, low energy consumption and high combustion efficiency.
Description
Technical Field
The invention relates to the technical field of combustors, in particular to an ammonia combustor.
Background
In the field of combustors, ammonia is used as a potential clean energy carrier and efficient fuel, and has a diversified application prospect. Ammonia is a renewable energy carrier that can be used as a fuel in a combustor to play a role in clean energy conversion. The combustion products of ammonia are mainly nitrogen and water, and hardly emit harmful gases, so that air pollution and greenhouse gas emission can be reduced. The energy efficient performance of ammonia in combustion is also a great advantage in the burner field. The high hydrogen content of ammonia makes it energy density high and can produce a large amount of heat energy. This makes ammonia a potentially efficient fuel option, helping to improve the energy efficiency of the burner.
Currently, there are still some difficulties in the large-scale application of ammonia on burners, mainly comprising: 1. the high hydrogen content and low ignition temperature of ammonia results in poor combustion stability; 2. a problem of nitrogen oxide emissions; 3. in different combustion plants, the combustion efficiency of ammonia may be affected; 4. the large scale use of ammonia as a fuel may require adaptation to existing combustion equipment and infrastructure, which requires equipment retrofitting or adaptation. 5. Ammonia as a fuel requires proper handling and storage to ensure its purity and stability; 6. ammonia is a toxic and flammable gas that can involve safety risks during storage, transport, and use. 7. The large-scale application of ammonia as fuel has high cost and relates to the aspects of technical development, equipment transformation, infrastructure construction and the like.
The direct combustion of ammonia is difficult, the technical problems of combustion stability, ignition, flame control and the like are involved, hydrocarbon and other harmful substances can be generated by the direct combustion, and the emission concentration of NOx is increased. Therefore, the existing ammonia burner apparatus still has the problems of high NOx emission, poor combustion stability, easy backfire and burning out of nozzles, and the like, and in addition, the combustion efficiency of ammonia cannot achieve optimal efficiency in different combustion apparatuses due to system design problems.
Disclosure of Invention
In view of this, the embodiment of the present application provides an ammonia burner to achieve the purposes of stable combustion, extremely low NOx emission, low energy consumption and high combustion efficiency.
The embodiment of the application provides the following technical scheme: an ammonia burner, comprising: the combustion chamber and the air inlet cavity are arranged on one side of the combustion chamber, are communicated with the combustion chamber and are used for introducing fuel and oxidant into the combustion chamber;
the combustion chamber comprises a first combustion shell and a second combustion shell, the first combustion shell is coaxially sleeved in the second combustion shell, a combustion cavity for combustion is formed in the first combustion shell, an ammonia heating cavity for heating ammonia is formed in an annular cavity between the first combustion shell and the second combustion shell, and an ammonia air inlet is formed in the tail of the ammonia heating cavity;
the air inlet cavity comprises a shell, an inlet for introducing an oxidant is formed in one side of the shell, a hydrogen air inlet cavity is formed in the shell, a mixed air inlet cavity is formed in the outer portion of the shell, and the hydrogen air inlet cavity and the mixed air inlet cavity are both communicated with the combustion cavity;
still include the third combustion casing, the coaxial cover of third combustion casing is in the outside of second combustion casing, the third combustion casing with the high Wen Anqi that the ring chamber between the second combustion casing formed and is used for decomposing ammonia decomposes the chamber, offer the gas introducing hole on the second combustion casing, be used for making high Wen Anqi in the ammonia heating chamber get into high temperature ammonia decomposes the chamber, set up catalytic structure in the high temperature ammonia decomposes the chamber, be used for making get into high Wen Anqi in high temperature ammonia decomposes the chamber pass through catalytic structure back decomposes nitrogen gas and hydrogen, the tail section in high temperature ammonia decomposes the chamber sets up the mixed gas exhaust hole, the mixed gas exhaust hole with the mixed gas inlet chamber intercommunication.
According to one embodiment of the present application, the number of bleed holes is plural and is uniformly distributed on the second combustion casing circumferentially.
According to one embodiment of the application, the air introducing hole is positioned at the front section of the high-temperature ammonia gas decomposition cavity, and the catalytic structure is arranged at the middle section of the high-temperature ammonia gas decomposition cavity; wherein the length of the middle section accounts for at least 3/4 of the length of the whole high-temperature ammonia decomposition cavity.
According to an embodiment of the application, the device further comprises a preheating device, wherein a first inlet of the preheating device is used for introducing liquid ammonia fuel, and a first outlet of the preheating device is connected with the ammonia gas inlet and used for gasifying the liquid ammonia fuel after preheating, so that gasified ammonia enters the ammonia heating cavity.
According to an embodiment of the application, the anterior segment of combustion chamber is the burning section, the tail section of combustion chamber is the exhaust section, the gas vent of exhaust section with preheating device's second access connection is used for letting in combustion tail gas preheating device is interior, carries out heat exchange through high temperature combustion tail gas and liquid ammonia fuel, makes liquid ammonia gasification.
According to an embodiment of the application, the device further comprises a cooling device, the mixed gas exhaust hole is communicated with the mixed gas inlet through a gas pipeline, and the cooling device is arranged on the gas pipeline and used for cooling mixed gas of nitrogen and hydrogen.
According to one embodiment of the present application, the engine further comprises an igniter disposed at an outlet position within the intake chamber.
According to an embodiment of the application, a spiral guide plate is arranged in the ammonia heating cavity and used for forming a plurality of spiral ammonia guide channels.
Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least: according to the embodiment of the invention, the burner and the ammonia decomposition device are integrated, the ammonia is heated by using heat generated during combustion of the burner, the ammonia is decomposed, and the ammonia is decomposed while the burner burns; after the ammonia is decomposed, mixed gas of hydrogen and nitrogen is generated, and the mixed gas enters a combustor to be continuously combusted to generate heat energy, so that high-energy-efficiency circulation of ammonia decomposition and combustion is formed. According to the embodiment of the invention, ammonia fuel is decomposed into hydrogen for combustion, so that the generation of nitrogen oxides is reduced, meanwhile, the technical problems of high difficulty in direct combustion of ammonia, related combustion stability, ignition, flame control and the like are avoided, the energy consumption in the ammonia decomposition process is low, and the combustion efficiency is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an ammonia burner in accordance with an embodiment of the present invention;
wherein, 1-hydrogen gas inlet cavity, 2-mixed gas inlet cavity, 3-high temperature ammonia decomposition cavity, 4-ammonia heating cavity, 5-combustion cavity.
Detailed Description
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
As shown in fig. 1, an embodiment of the present invention provides an ammonia burner including: the combustion chamber and the air inlet cavity are arranged on one side of the combustion chamber, are communicated with the combustion chamber and are used for introducing fuel and oxidant into the combustion chamber; the combustion chamber comprises a first combustion shell and a second combustion shell, the first combustion shell is coaxially sleeved in the second combustion shell, a combustion cavity 5 for combustion is formed in the first combustion shell, an ammonia heating cavity 4 for heating ammonia is formed in an annular cavity between the first combustion shell and the second combustion shell, and an ammonia air inlet is formed in the tail of the ammonia heating cavity 4;
the air inlet cavity comprises a shell, an inlet for introducing an oxidant is formed in one side of the shell, a hydrogen air inlet cavity 1 is formed in the shell, a mixed air inlet cavity 2 is formed in the outer portion of the shell, and the hydrogen air inlet cavity 1 and the mixed air inlet cavity 2 are communicated with the combustion cavity 5; still include the third combustion casing, the coaxial cover of third combustion casing is in the outside of second combustion casing, the third combustion casing with the high Wen Anqi that the ring chamber between the second combustion casing formed and is used for decomposing ammonia decomposes chamber 3, offer the gas introducing hole on the second combustion casing, be used for making high Wen Anqi in the ammonia heating chamber 4 get into high temperature ammonia decomposes chamber 3, set up catalytic structure in the high temperature ammonia decomposes chamber 3, be used for making get into high Wen Anqi of high temperature ammonia decomposes chamber 3 pass through catalytic structure back decomposition becomes nitrogen gas and hydrogen, the tail end of high temperature ammonia decomposes chamber 3 sets up the mixed gas exhaust hole, the mixed gas exhaust hole with the mixed gas inlet chamber 2 intercommunication.
The combustion chamber of the embodiment of the invention comprises a first combustion shell, a second combustion shell and a third combustion shell which are coaxially sleeved, wherein the inner cavity of the first combustion shell is a combustion cavity 5, the annular cavity between the first combustion shell and the second combustion shell is an ammonia heating cavity 4, and the annular cavity between the second combustion shell and the third combustion shell is a high Wen Anqi decomposition cavity 3. The air inlet cavity is internally provided with an oxidant inlet, namely an air inlet, and is also provided with a hydrogen air inlet cavity 1 for introducing hydrogen, and the air inlet cavity also comprises a mixed gas air inlet cavity 2, wherein the mixed gas air inlet cavity 2 is used for introducing the mixed gas of nitrogen and hydrogen generated by the decomposition of the high-temperature ammonia decomposition cavity 3 into the combustion cavity 5 to participate in combustion. In practice, the burner is connected to downstream equipment such as a boiler via a mounting flange, and the high temperature exhaust gas produced is used for heating hot water, producing steam, and the like. The exhaust gas generated by the boiler is discharged through an exhaust pipe.
The combustion process of the device in specific implementation is as follows: in the initial state, hydrogen enters the combustion chamber 5 through the hydrogen inlet chamber 1 of the burner, is ignited by an igniter arranged at the inlet position of the combustion chamber 5, and is combusted in the combustion chamber 5 to generate heat energy to heat the burner. Simultaneously, the ammonia fuel is introduced through the ammonia air inlet, the ammonia enters the ammonia heating cavity 4, along with the flow of the ammonia from the tail end of the cavity to the front end of the cavity, the ammonia is gradually heated to the decomposable temperature by the heat energy generated by the combustion of the hydrogen, under the action of air pressure, the high Wen Anqi enters the high Wen Anqi decomposition cavity 3 from the air entraining hole, flows from the front end to the tail end of the high Wen Anqi decomposition cavity 3, and after the catalytic structure, is decomposed into the hydrogen and the nitrogen under the action of the catalyst and then is discharged out of the burner. The discharged mixed gas reenters the combustion chamber 5 through the mixed gas inlet to participate in combustion. At this time, the supply of hydrogen gas was stopped. The heat energy generated by the combustion of the mixed gas heats the burner to form a circulating combustion system. According to the embodiment, ammonia is decomposed into nitrogen and hydrogen through the built-in ammonia decomposition structure, the problems of high difficulty in direct combustion and unstable combustion of the ammonia are solved, the combustion temperature of the hydrogen is low under the action of the nitrogen, the emission amount of NOx is lower than that of direct combustion, and due to the reduction effect of the hydrogen, the emission amount of NOx can be reduced when the nitrogen is injected.
In addition, the ammonia is decomposed by heating the heat generated by self combustion in the combustor, additional electric energy heating is not needed, and compared with the traditional mode of decomposing the ammonia by adopting electric energy and other modes, the consumption of electric energy is effectively reduced, and the comprehensive energy efficiency is improved. And the ammonia gas is heated by using the heat energy generated by combustion to decompose the ammonia gas, and the decomposed mixed gas returns to the combustion cavity 5 to participate in combustion, so that an efficient self-circulation combustion system is formed, the combustion heat energy is efficiently utilized, the combustion efficiency is greatly improved, and the energy consumption is reduced.
In one embodiment, the number of bleed holes is plural and is uniformly distributed circumferentially on the second combustion housing, respectively. The gas introduction holes are uniformly arranged at intervals, so that the gas can enter the high Wen Anqi decomposition cavity 3 uniformly at the height Wen Anqi, and the gas can be decomposed uniformly through the catalytic structure.
In the gas flow direction, ammonia in the ammonia heating cavity 4 flows from the cavity tail end to the cavity front end, and after entering the high Wen Anqi decomposition cavity 3, the gas flows from the cavity front end to the cavity tail end, so that the length of the catalytic structure needs to be strictly set in order to ensure that the high Wen Anqi can be completely decomposed. In the specific implementation, the position of the air vent is arranged at the front section of the high-temperature ammonia gas decomposition cavity 3, and the catalytic structure is arranged at the middle section of the high-temperature ammonia gas decomposition cavity 3; and the length of the middle section accounts for at least 3/4 of the length of the whole high-temperature ammonia gas decomposition cavity 3, so that the complete decomposition of ammonia gas is ensured.
In one embodiment, the device further comprises a preheating device, wherein a first inlet of the preheating device is used for introducing liquid ammonia fuel, and a first outlet of the preheating device is connected with the ammonia gas inlet and is used for gasifying the liquid ammonia fuel after preheating, so that gasified ammonia gas enters the ammonia gas heating cavity 4.
Compared with conventional fuels such as gasoline, natural gas, liquefied petroleum gas, methanol and hydrogen, the cost of ammonia is the lowest, ammonia combustion products do not contain carbon harmful pollutants, the volumetric energy density of ammonia is 33% higher than that of liquid hydrogen, meanwhile, liquid ammonia is easier to store and transport compared with liquid hydrogen due to low vapor pressure and high boiling point, and the fuel cost is greatly reduced while zero carbon emission is realized. Therefore, in the concrete implementation, liquid ammonia fuel is adopted, and firstly, the liquid ammonia fuel is heated by a preheating device, so that the liquid ammonia is gasified into ammonia gas, and then the ammonia gas is introduced into the ammonia gas heating cavity 4.
The preheating device of this embodiment may adopt a conventional heat exchange structure, in a more preferred embodiment, the front section of the combustion chamber 5 is a combustion section, the tail section of the combustion chamber 5 is an exhaust section, and an exhaust port of the exhaust section is connected with the second inlet of the preheating device, so that the combustion tail gas is introduced into the preheating device, and heat exchange is performed between the high-temperature combustion tail gas and the liquid ammonia fuel, so that the liquid ammonia is gasified. According to the embodiment, the heat energy of the combustion tail gas is fully utilized to gasify the liquid ammonia, so that heat loss is avoided, and energy consumption is reduced.
In one embodiment, the device further comprises a cooling device, wherein the mixed gas exhaust hole is communicated with the mixed gas inlet through a gas pipeline, and the cooling device is arranged on the gas pipeline and is used for cooling the mixed gas of nitrogen and hydrogen. The temperature of the hydrogen and the nitrogen generated after decomposing the cavity 3 by the high Wen Anqi is still high, and a cooling device is arranged on the gas pipeline to slightly reduce the temperature of the mixed gas and then enter the mixed gas inlet cavity 2.
In the ammonia heating chamber 4, because ammonia flows from the chamber tail end to the chamber front end, in order to guarantee that ammonia can evenly and stably flow, and can reach the required temperature of decomposition when flowing to the chamber front end, in a preferred structure, set up spiral guide plate in the ammonia heating chamber 4 for form many spiral ammonia water conservancy diversion passageway for ammonia flows through water conservancy diversion passageway spiral, evenly is heated, guarantees the normal clear of decomposition process.
According to the embodiment of the invention, the burner and the ammonia decomposition device are integrated, and the ammonia is heated by utilizing heat generated during combustion of the burner, so that ammonia decomposition is completed; the mixed gas of hydrogen and nitrogen is generated after the ammonia is decomposed, and the mixed gas enters a burner to be continuously combusted to generate heat energy, so that the high-efficiency circulation of ammonia decomposition combustion is formed, and the high-efficiency, stable and controllable combustion reaction is realized.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. An ammonia burner, comprising: the combustion chamber and the air inlet cavity are arranged on one side of the combustion chamber, are communicated with the combustion chamber and are used for introducing fuel and oxidant into the combustion chamber;
the combustion chamber comprises a first combustion shell and a second combustion shell, the first combustion shell is coaxially sleeved in the second combustion shell, a combustion cavity for combustion is formed in the first combustion shell, an ammonia heating cavity for heating ammonia is formed in an annular cavity between the first combustion shell and the second combustion shell, and an ammonia air inlet is formed in the tail of the ammonia heating cavity;
the air inlet cavity comprises a shell, an inlet for introducing an oxidant is formed in one side of the shell, a hydrogen air inlet cavity is formed in the shell, a mixed air inlet cavity is formed in the outer portion of the shell, and the hydrogen air inlet cavity and the mixed air inlet cavity are both communicated with the combustion cavity;
still include the third combustion casing, the coaxial cover of third combustion casing is in the outside of second combustion casing, the third combustion casing with the high Wen Anqi that the ring chamber between the second combustion casing formed and is used for decomposing ammonia decomposes the chamber, offer the gas introducing hole on the second combustion casing, be used for making high Wen Anqi in the ammonia heating chamber get into high temperature ammonia decomposes the chamber, set up catalytic structure in the high temperature ammonia decomposes the chamber, be used for making get into high Wen Anqi in high temperature ammonia decomposes the chamber pass through catalytic structure back decomposes nitrogen gas and hydrogen, the tail section in high temperature ammonia decomposes the chamber sets up the mixed gas exhaust hole, the mixed gas exhaust hole with the mixed gas inlet chamber intercommunication.
2. The ammonia burner of claim 1, wherein the number of bleed holes is a plurality and each is circumferentially uniformly distributed on the second combustion housing.
3. The ammonia burner of claim 1, wherein the gas introduction hole is located at a front section of the high-temperature ammonia gas decomposition chamber, and the catalytic structure is disposed at a middle section of the high-temperature ammonia gas decomposition chamber; wherein the length of the middle section accounts for at least 3/4 of the length of the whole high-temperature ammonia decomposition cavity.
4. The ammonia burner of claim 1, further comprising a preheating device, wherein a first inlet of the preheating device is used for introducing liquid ammonia fuel, and a first outlet of the preheating device is connected with the ammonia gas inlet and is used for gasifying the liquid ammonia fuel after preheating, so that the gasified ammonia gas enters the ammonia gas heating cavity.
5. The ammonia burner of claim 4, wherein the front section of the combustion chamber is a combustion section, the rear section of the combustion chamber is an exhaust section, and an exhaust port of the exhaust section is connected to the second inlet of the preheating device for introducing combustion exhaust gas into the preheating device, and the combustion exhaust gas exchanges heat with liquid ammonia fuel at a high temperature to gasify the liquid ammonia.
6. The ammonia burner of claim 1, further comprising a cooling device, wherein the mixed gas exhaust hole is communicated with the mixed gas inlet through a gas pipeline, and the cooling device is arranged on the gas pipeline and is used for cooling the mixed gas of nitrogen and hydrogen.
7. The ammonia burner of claim 1, further comprising an igniter disposed at an outlet location within the intake chamber.
8. The ammonia burner of claim 1, wherein a spiral deflector is disposed within the ammonia heating chamber for forming a plurality of spiral ammonia deflector channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311394343.6A CN117267711A (en) | 2023-10-25 | 2023-10-25 | Ammonia burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311394343.6A CN117267711A (en) | 2023-10-25 | 2023-10-25 | Ammonia burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117267711A true CN117267711A (en) | 2023-12-22 |
Family
ID=89216022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311394343.6A Pending CN117267711A (en) | 2023-10-25 | 2023-10-25 | Ammonia burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117267711A (en) |
-
2023
- 2023-10-25 CN CN202311394343.6A patent/CN117267711A/en active Pending
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