CN220186803U - Graded ammonia fuel combustion device - Google Patents
Graded ammonia fuel combustion device Download PDFInfo
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- CN220186803U CN220186803U CN202321602514.5U CN202321602514U CN220186803U CN 220186803 U CN220186803 U CN 220186803U CN 202321602514 U CN202321602514 U CN 202321602514U CN 220186803 U CN220186803 U CN 220186803U
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 385
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 192
- 239000000446 fuel Substances 0.000 title claims abstract description 192
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 120
- 239000007789 gas Substances 0.000 claims abstract description 144
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 70
- 239000000567 combustion gas Substances 0.000 claims abstract description 46
- 238000003860 storage Methods 0.000 claims abstract description 13
- 238000007084 catalytic combustion reaction Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 15
- 230000003197 catalytic effect Effects 0.000 claims description 14
- 239000002737 fuel gas Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010571 fourier transform-infrared absorption spectrum Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052750 molybdenum Inorganic materials 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Abstract
The present utility model provides a staged ammonia fuel combustion device, wherein the device comprises a housing; the primary combustion zone comprises a blower positioned at the front end of the shell and a cyclone burner positioned in the shell, a combustion-supporting gas inlet and an igniter interface are arranged at the inlet of the cyclone burner, and the primary combustion zone is used for enabling the combustion-supporting gas to burn in the cyclone burner and generating combustion gas; the secondary combustion zone is arranged at the downstream of the primary combustion zone in the shell and comprises a gas mixing zone formed by a plurality of porous pipelines and a plurality of ammonia fuel inlets and a catalytic reaction zone positioned at the downstream of the gas mixing zone; and an ammonia fuel delivery zone located outside the housing, the ammonia fuel delivery zone including an ammonia fuel storage tank and a plurality of branch pipes, the ammonia fuel delivery zone being connected to the gas mixing zone such that ammonia fuel is delivered to the gas mixing zone through the plurality of branch pipes, the apparatus further including a rectifier disposed between the cyclone burner and the gas mixing zone for extinguishing a flame of combustion gas generated by the cyclone burner.
Description
Technical Field
The utility model belongs to the technical field of fuel combustion, and particularly relates to a graded ammonia fuel combustion device.
Background
Currently, the main stream of energy systems is traditional fossil fuels represented by coal, oil and natural gas. However, excessive use of these fossil fuels causes environmental pollution, which aggravates the greenhouse effect. The research on new low-carbon fuels is becoming more important for the purpose of carbon peak achievement and carbon neutralization.
Ammonia is a zero carbon fuel, and is also a carrier of hydrogen energy and a common fuel for combustion systems, and thus has attracted considerable attention. Ammonia has the advantage of higher energy density when burned as a gaseous fuel, but the ignition temperature of ammonia is relatively high and the flame propagation speed is relatively slow, resulting in relatively poor stability of ammonia combustion. At the same time, ammonia produces fuel-type nitrogen oxides (NO x ) And NO of fuel type x It is more difficult to remove by means of lowering the temperature.
Disclosure of Invention
In view of the above, the present utility model provides a staged ammonia fuel combustion device in an effort to at least partially solve the above-described problems.
As a first aspect of the present utility model, there is provided a staged ammonia fuel combustion device comprising: a housing; a primary combustion zone and a secondary combustion zone,
the primary combustion zone comprises a blower arranged at the front end of the shell and a cyclone burner arranged in the shell, wherein a combustion-supporting gas inlet and an igniter interface are arranged at the inlet of the cyclone burner, and the primary combustion zone is used for enabling the combustion-supporting gas to burn in the cyclone burner to generate combustion gas;
the secondary combustion zone is arranged in the shell and is arranged at the downstream of the primary combustion zone, and comprises a gas mixing zone consisting of a plurality of porous pipelines and a plurality of ammonia fuel inlets and a catalytic reaction zone positioned at the downstream of the gas mixing zone; and
the ammonia fuel conveying area is arranged outside the shell and comprises an ammonia fuel storage tank and a plurality of branch pipelines, and the ammonia fuel conveying area is connected with the gas mixing area and is used for conveying ammonia fuel from different positions to the gas mixing area through the plurality of branch pipelines;
wherein the ammonia fuel combustion device further comprises:
and the rectifier is arranged between the cyclone burner and the gas mixing zone and is used for extinguishing the flame of the combustion gas generated by the cyclone burner.
In one embodiment, the catalytic reaction zone is configured to produce NO at a temperature below that of the ammonia fuel gas mixture from the gas mixing zone x Catalytic combustion is carried out at the temperature of the temperature.
In one embodiment thereof, the apparatus further comprises: and another rectifier provided between the cyclone burner and the blower for converting irregularly flowing air sucked by the blower into regularly flowing air.
In one embodiment thereof, the apparatus further comprises: and the tail gas collecting and discharging area is arranged in the shell and is arranged at the downstream of the catalytic reaction area, wherein the tail gas collecting and discharging area comprises a tail gas collecting area and a tail gas discharging area, and the tail gas collecting area is provided with a connecting port for connecting with smoke analysis equipment.
In one embodiment, the catalytic reaction zone comprises a catalytic rectifier and catalytic reaction units, one or more catalytic reaction units, and the areas of the catalytic reaction units are the same or different.
In one embodiment thereof, the apparatus further comprises: a plurality of flow meters;
wherein, a flowmeter is arranged at one end of the blower to control the flow rate of the sucked air;
a flowmeter is arranged at the combustion-supporting gas inlet to control the flow of the combustion-supporting gas;
the ammonia fuel storage tank is connected with the plurality of branch pipelines through a main pipeline, and a flowmeter is arranged on the main pipeline so as to control the flow of ammonia fuel;
flow meters are arranged on the branch pipelines to control the flow of ammonia fuel in the branch pipelines at different positions.
In one embodiment thereof, the apparatus further comprises: a plurality of thermocouples;
wherein, a thermocouple is arranged on the main pipeline of the ammonia fuel conveying area and is used for detecting the temperature of ammonia fuel;
a thermocouple is arranged at the inlet of the cyclone burner and used for detecting the combustion temperature in the cyclone burner;
a thermocouple is arranged at the outlet end of the primary combustion zone and used for detecting the temperature of the combustion gas entering the secondary combustion zone;
the thermocouple is arranged at the inlet end of the secondary combustion zone and used for detecting the temperature of the combustion gas after entering the secondary combustion zone, and the thermocouple is arranged at the outlet end of the secondary combustion zone and used for detecting the temperature of the mixed gas of the combustion gas and the ammonia fuel after being mixed to form the ammonia fuel; and
a thermocouple is arranged between the catalytic rectifier and the catalytic reaction unit of the catalytic reaction zone and used for detecting the temperature of the ammonia fuel mixed gas after being catalyzed by the catalytic rectifier; and
a plurality of thermocouples are arranged among the catalytic units and are used for detecting the temperature after the catalytic reaction units catalyze.
In one embodiment, the ammonia fuel delivery area is multiple, and each branch pipeline in the ammonia fuel delivery area is uniformly distributed outside the shell in a circumference manner.
In one embodiment, gaskets are used for sealing the air blower, the cyclone burner, the gas mixing zone, the catalytic reaction zone and the tail gas collecting and discharging zone in sequence, and the gaskets are connected through flanges.
In one of these embodiments, the manner in which the main pipe of the ammonia fuel delivery unit is connected to the plurality of branch pipes includes welding or flanged connections;
the connection mode of the plurality of branch pipelines and the plurality of hole pipelines of the gas mixing zone comprises welding or flange connection.
Based on the technical scheme, the classified ammonia fuel combustion device provided by the utility model has at least one of the following beneficial effects:
(1) In the embodiment of the utility model, in the primary combustion zone, air is sucked by a blower arranged at the front end of the shell and mixed with combustion-supporting gas entering through a combustion-supporting gas inlet arranged at the inlet of the cyclone burner, combustion gas with cyclone flame is formed in the cyclone burner, the flame of the combustion gas with the cyclone flame is extinguished by a rectifier arranged between the cyclone burner and the gas mixing zone, the flame is prevented from entering the secondary combustion zone, and only combustion gas which does not contain flame and has higher temperature enters the gas mixing zone of the secondary combustion zone. The ammonia fuel conveying area arranged outside the shell comprises an ammonia fuel storage tank and a plurality of branch pipelines, ammonia fuel is conveyed to the gas mixing area from different positions through the plurality of branch pipelines, the gas mixing area comprises a plurality of porous pipelines and a plurality of ammonia fuel inlets, and the porous pipelines and the ammonia fuel inlets can be used for enabling the ammonia fuel from different positions of the ammonia fuel conveying area and combustion gas with higher temperature to be mixed repeatedly and fully to form ammonia fuel mixed gas. The ammonia fuel mixed gas enters a catalytic reaction zone positioned at the downstream of the gas mixing zone, and is subjected to catalytic combustion under the action of a catalyst, so that the ammonia fuel is finally converted into nitrogen, and NO is reduced x Is generated.
(2) In the embodiment of the utility model, the primary combustion zone, the secondary combustion zone and the ammonia fuel conveying zone are utilized to realize the heating of the ammonia fuel by utilizing the heat of combustion gas on one hand, and the ammonia fuel is conveyed to the gas mixing zone from different positions by utilizing a plurality of branch pipelines on the other hand, and the combustion progress of the ammonia fuel mixed gas in the catalytic reaction zone can be controlled by controlling the residence time of the ammonia fuel in the gas mixing zone so as to realize the ammoniaReduction of NO while stable combustion of fuel x The production of the ammonia fuel is finally realized. In addition, the temperature of the ammonia fuel can be increased to the catalytic combustion temperature by mixing the combustion gas with the ammonia fuel at different positions, so that the ammonia fuel mixed gas enters the catalytic reaction zone and is directly catalyzed, the use of the auxiliary fuel gas is reduced, meanwhile, the temperature of the catalytic reaction zone can be controlled by graded mixing, the possibility of generating nitrogen oxide compounds due to overhigh ammonia combustion temperature is reduced, and the efficient and clean utilization of the ammonia fuel is realized. In addition, the device has compact structure and simple flow, and is suitable for reconstruction of new equipment or old equipment.
(3) In the embodiment of the utility model, the effective and selective catalytic combustion of ammonia fuel can be realized by adjusting the size, the composition and the arrangement form of the catalytic reaction units in the catalytic reaction zone, thereby effectively reducing NO x Is generated. In addition, the pressure loss and the heat transfer loss caused by the catalytic reaction unit can reversely influence the catalytic combustion reaction in the catalytic reaction zone, so that the problems of insufficient and unstable combustion of the ammonia fuel caused by too slow or too severe catalytic combustion are solved.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent from the following description of embodiments of the present utility model with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a staged ammonia fuel combustion device in accordance with an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a porous pipe according to an embodiment of the present utility model;
FIG. 3 is a schematic cross-sectional view of a honeycomb catalytic reaction unit in accordance with one embodiment of the utility model;
FIG. 4 is a schematic diagram of a staged ammonia fuel combustion device in accordance with another embodiment of the present utility model.
[ reference numerals description ]
The device comprises a 1-blower, a 2-shell, a 3-combustion-supporting gas inlet, a 4-rectifier, a 5-cyclone burner, a 6-igniter interface, a 7-thermocouple, an 8-porous pipeline, a 9-flowmeter, a 10-gas mixing zone, an 11-branch pipeline, a 12-ammonia fuel storage tank, a 13-catalytic rectifier, a 14-catalytic reaction zone, a 15-tail gas collecting and discharging zone and a 16-catalytic reaction unit.
Detailed Description
The present utility model will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
The ammonia fuel is used as a substitute fuel to replace traditional fuels such as coal, petroleum, natural gas and the like, and has wider application prospect. However, ammonia fuel has problems of high ignition temperature, difficult ignition, slow flame propagation speed, poor combustion stability and the like, which restricts the large-scale use. In particular, when the combustion temperature exceeds the production of fuel type NO x Is liable to generate NO at the temperature of (2) x Is liable to cause environmental pollution such as more than 1300 ℃.
Therefore, the embodiment of the utility model provides a staged ammonia fuel combustion device, which utilizes the synergistic effect of staged mixing of a plurality of branch pipelines of an ammonia fuel conveying zone and a plurality of ammonia fuel inlets of a gas mixing zone and catalytic fuel of a catalytic reaction zone to mix combustion gas with higher temperature and ammonia fuel at different positions to form ammonia fuel mixed gas, and can control the residence time of the ammonia fuel in the gas reaction zone and the reaction progress of the ammonia fuel mixed gas in the catalytic reaction zone by controlling the opening of the branch pipelines at different positions and the ammonia fuel amount fed into the gas mixing zone, thereby realizing clean combustion of the ammonia fuel and reducing NO x The combustion speed and the combustion stability of the ammonia fuel are effectively improved, and the problem of generating nitrogen oxide compounds during the combustion of the ammonia fuel is solved.
Specifically, as one aspect of the present utility model, there is provided a staged ammonia fuel combustion device comprising: a housing, a primary combustion zone, a secondary combustion zone, and an ammonia fuel delivery zone.
The primary combustion zone comprises a blower arranged at the front end of the shell and a cyclone burner arranged in the shell, a combustion-supporting gas inlet and an igniter interface are arranged at the inlet of the cyclone burner, and the primary combustion zone is used for enabling the combustion-supporting gas to burn in the cyclone burner to generate combustion gas.
The secondary combustion zone is arranged in the shell, and comprises a gas mixing zone formed by a plurality of porous pipelines and a plurality of ammonia fuel inlets and a catalytic reaction zone positioned at the downstream of the gas mixing zone.
And the ammonia fuel conveying area is arranged outside the shell and comprises an ammonia fuel storage tank and a plurality of branch pipelines, and is connected with the gas mixing area and used for conveying ammonia fuel from different positions to the gas mixing area through the plurality of branch pipelines.
Wherein the ammonia fuel combustion device further comprises:
and the rectifier is arranged between the cyclone burner and the gas mixing zone and is used for extinguishing the flame of the combustion gas generated by the cyclone burner.
FIG. 1 is a schematic diagram of a staged ammonia fuel combustion device in accordance with an embodiment of the present utility model.
A staged ammonia fuel combustion device in accordance with an embodiment of the present utility model is described in detail below with reference to fig. 1.
Specifically, as shown in fig. 1, the staged ammonia fuel combustion device provided by the embodiment of the utility model comprises: a housing 2, a primary combustion zone, a secondary combustion zone, and an ammonia fuel delivery zone.
The housing 2 is composed of stainless steel or a metal resistant to a high temperature, such as: titanium, molybdenum, tungsten, tantalum, niobium, etc. An air flow pipeline is formed in the shell 2, and a combustion-supporting gas inlet 3, a plurality of flowmeter interfaces, a thermocouple temperature measuring port and the like can be arranged on the surface of the shell 2 according to requirements.
The primary combustion zone is provided with a blower 1, a combustion-supporting gas inlet 3, a rectifier 4, a cyclone burner 5 and an igniter interface 6, and is used for enabling the combustion-supporting gas to burn in the cyclone burner 5 to generate combustion gas.
A secondary combustion zone is provided in the housing 2 downstream of the primary combustion zone, and includes a gas mixing zone 10 composed of a plurality of porous pipes 8 and a plurality of ammonia fuel inlets (not shown in the figure), and a catalytic reaction zone 14 downstream of the gas mixing zone 10 for catalytic combustion after mixing the combustion gas with the ammonia fuel.
The ammonia fuel delivery area is arranged outside the shell 2 and comprises a flowmeter 9, a plurality of branch pipelines 11 and an ammonia fuel storage tank 12. The ammonia fuel delivery zone communicates with the ammonia gas inlet of the gas mixing zone 10 through a plurality of branch pipes 11 for mixing with the flame-free combustion gas generated through the primary combustion zone after the ammonia fuel is delivered to the gas mixing zone 10 from different locations through the plurality of branch pipes 11.
More specifically, a blower 1 is provided at the front end of the housing 2 for introducing air into an air flow duct inside the housing 2 to be introduced into the cyclone burner 5 and thus into the whole ammonia fuel combustion device. The cyclone burner 5 is arranged in the shell 2 and consists of a shaft body and guide vanes. The inlet of the cyclone burner is provided with a combustion-supporting gas inlet 3 and an igniter interface 6, and the igniter interface 6 is connected with an igniter to ignite the mixed gas of the combustion-supporting gas and the air in the cyclone burner, wherein the igniter can be an electric spark igniter or other kinds of igniters. The auxiliary fuel gas enters the cyclone burner 5 through the combustion-supporting gas inlet 3 and is mixed with air blown by the blower 1 in the cyclone burner 5, the ignited combustion-supporting gas and air are combusted in the cyclone burner 5 through an igniter connected with an igniter interface 6 to generate combustion gas, the combustion gas is combustion gas with cyclone flame, the auxiliary fuel gas can be selected from methane, hydrogen or other hydrocarbon combustible gas, and the use of the auxiliary fuel gas is helpful for improving the combustion speed of the ammonia fuel after the subsequent ammonia fuel and the combustion gas are mixed.
A gas mixing zone 10 is provided inside the housing 2 downstream of the primary combustion zone. A plurality of porous tubes 8 and a plurality of ammonia fuel inlets are provided inside the gas mixing zone 10 so that the ammonia fuel delivered from the ammonia fuel delivery zone is more uniformly mixed with the flameless combustion gas from the primary combustion zone.
FIG. 2 is a schematic diagram of a porous pipe according to an embodiment of the utility model.
The openings of the porous tube 8 may include circles, squares, etc., and are not limited to the structure shown in fig. 2.
The catalytic reaction zone 14 is disposed inside the housing 2 downstream of the secondary combustion zone and includes a catalytic rectifier 13 and a catalytic reaction unit 16. The main body of the catalytic reaction zone 14 is a stainless steel pipeline, a porous medium is arranged in the pipeline of the catalytic reaction unit 16, and a metal catalyst is attached to the surface of the porous medium, wherein the porous medium can be a honeycomb nest core, a rectangular nest core and other regular pattern nest cores, but the structure of the porous medium is not limited to the porous medium. The metal catalyst may include copper foam, nickel foam, iron foam, etc., and the catalytic rectifier may be copper foam. The pressure loss and heat transfer loss due to the porous medium structure of the catalytic reaction unit 16 can adversely affect the catalytic combustion reaction in the catalytic reaction zone 14, thereby solving the problems of insufficient and unstable combustion of the ammonia fuel caused by too slow or too severe catalytic combustion.
FIG. 3 is a schematic cross-sectional view of a catalytic honeycomb unit according to an embodiment of the utility model.
The porous medium of the catalytic reaction unit 16 is a cross section of a honeycomb plate, but is not limited to the shape shown in fig. 3.
The ammonia fuel delivery zone is arranged outside the housing 2 and comprises an ammonia fuel storage tank 12 and a plurality of branch pipelines 11, wherein the outlets of the plurality of branch pipelines 11 are communicated with a plurality of ammonia fuel inlets (not shown in the figure) of the gas mixing zone 10, and the ammonia fuel delivery zone is communicated with the gas mixing zone 10 through the plurality of branch pipelines 11, so that the ammonia fuel storage tank 9 delivers ammonia fuel from different positions into the gas mixing zone 10 through the ammonia fuel inlets through the plurality of branch pipelines 11 and carries out graded mixing with combustion gas without flame, and the ammonia fuel storage tank 12 is selected from an ammonia gas bottle or a liquid ammonia bottle for providing a source of the ammonia fuel for the ammonia fuel combustion device.
In the embodiment of the utility model, the combustion-supporting gas and air are mixed in the cyclone burner and combusted to obtain the combustion gas with flame, the flame is extinguished after being treated by the rectifier 4, and only the combustion gas (high-temperature gas) is reserved to enter the secondary combustion zone. The ammonia fuel delivery zone provides ammonia fuel through a plurality of bypass conduits 11Is delivered to different positions of the gas mixing zone 10 and is mixed with the combustion gas of the gas mixing zone 10 to obtain the ammonia fuel mixed gas. Subsequently, the ammonia fuel gas mixture enters the catalytic reaction zone 14 and undergoes a catalytic reaction, so that the ammonia fuel gas mixture undergoes a catalytic reaction to produce nitrogen. The combustion gas generated in the primary combustion zone and the ammonia fuel are mixed with each other repeatedly and fully by utilizing the synergistic effect among the primary combustion zone, the secondary combustion zone and the ammonia fuel conveying device, the residence time of the ammonia fuel in the gas mixing zone 10 is controlled, the combustion process of the ammonia fuel mixed gas in the catalytic reaction zone 14 can be controlled, and the NO is reduced while stable combustion of the ammonia fuel is realized x The production of the ammonia fuel is finally realized. Meanwhile, the device has compact structure and can be suitable for new equipment or further improvement on old equipment.
In accordance with an embodiment of the present utility model, catalytic reaction zone 14 is used to mix ammonia fuel gas from gas mixing zone 10 at a temperature below that at which NO is produced x Catalytic combustion is carried out at the temperature of the temperature. By means of thermocouples 7 arranged on the plurality of porous pipes 8 of the gas mixing zone 10, the temperature of the combustion gas in the gas mixing zone 10, which is higher than the temperature of the generated NO, is detected to form an ammonia fuel mixture after mixing with the ammonia fuel x Under the condition of temperature, the heat of the combustion gas is reduced by adjusting the mixing ratio of the fuel gas and the air, and the temperature in the gas mixing area is further reduced. Alternatively, the temperature in the gas mixing zone 10 is adjusted by controlling the amount of ammonia fuel introduced into the gas mixing zone 10. By controlling the temperature of the ammonia fuel mixture to be lower than NO x The generated catalytic reaction temperature is used for leading the ammonia fuel mixed gas to enter the catalytic reaction zone 14 for catalytic combustion, so that the stability of ammonia fuel combustion can be improved and NO can be reduced x The temperature of the gas mixture zone 10 can be controlled to be about 1000 c, for example.
In accordance with an embodiment of the present utility model, and as further shown in FIG. 1, the ammonia fuel combustion device further comprises: another rectifier 4 is provided between the blower 1 and the cyclone burner 5 for converting irregularly flowing air sucked by the blower 1 into regularly flowing air, the rectifier 4 being a porous means, and the pores may be in a regular shape such as a circle, a square, a hexagon, etc.
In accordance with an embodiment of the present utility model, and as further shown in FIG. 1, the ammonia fuel combustion device of the present utility model further comprises: an exhaust collection and emission area 15. The exhaust gas collecting and discharging area 15 is arranged in the shell 2 and is arranged at the downstream of the catalytic reaction area 14, wherein the exhaust gas collecting and discharging area 15 comprises an exhaust gas collecting area and an exhaust gas discharging area, and the exhaust gas collecting area is provided with a connecting port for connecting with a flue gas analysis device and/or an exhaust gas collecting device, and the flue gas analysis device can select a flue gas analyzer, a Fourier transform infrared absorption spectrum tester (F TIR) and the like. The method can be understood as that the tail gas generated by the catalytic combustion of the fuel and the combustion gas is detected by utilizing the gas capturing bag, the types and the concentration of the reactants generated by the combustion of the ammonia fuel are analyzed, the final product after the catalytic combustion of the ammonia fuel is detected, and the generated tail gas is circulated through the tail gas emission area and finally emitted.
According to an embodiment of the present utility model, the ammonia fuel combustion device as shown in FIG. 1 further comprises a plurality of flow meters.
Specifically, a flow meter (not shown) is also provided at one end of the blower 1 to control the flow rate of the intake air. A flow meter (not shown) is further provided at the combustion-supporting gas inlet 3 to control the flow rate of the combustion-supporting gas, and the mixing ratio of air and the combustion-supporting gas is controlled by using the flow meter at the blower 2 and the flow meter at the combustion-supporting gas inlet 3, thereby controlling the heat of the combustion gas.
The ammonia fuel tank 12 is connected to the plurality of branch pipelines 11 through a main pipeline, and a flowmeter 9 is provided on the main pipeline for controlling the flow rate of the ammonia fuel on the main pipeline. The flow meters 9 are further arranged on the branch pipelines 11, the flow meters 9 can control the flow of the ammonia fuel on each branch pipeline, the branch pipelines 11 are used for separating different branches from the main pipeline of the ammonia fuel storage tank 12 to transport the ammonia fuel, the flow meters 9 are used for cooperatively controlling the feeding position and the feeding amount of the ammonia fuel, and further the residence time of the ammonia fuel in the gas mixing zone 10 is controlled. In other words, the mixing of the ammonia fuel and the combustion gas at different locations is achieved through the plurality of branch pipes 11, so that the ammonia fuel mixture gas is combusted in stages in the catalytic reaction zone 14, thereby controlling the progress of the reaction. It should be noted that a valve or a flow control unit having the same function of controlling the flow rate or the flow velocity as the flow meter 9 may be used, and detailed description thereof will not be repeated.
In accordance with an embodiment of the present utility model, and as further shown in FIG. 1, a plurality of thermocouples are also provided in the primary combustion zone and the secondary combustion zone for sensing temperature at different locations.
Specifically, a thermocouple (not shown) is further disposed at the inlet of the cyclone burner 5, for detecting the temperature of combustion in the cyclone burner 5, that is, the temperature of combustion of the combustion-supporting gas and air; a thermocouple 7 is provided at the outlet end of the swirling combustion zone 5 for detecting the temperature of the combustion gas entering the gas mixing zone 10. A thermocouple 7 is also provided on the main pipe of the ammonia fuel delivery zone for detecting the temperature of the ammonia fuel. A thermocouple 7 is provided at the outlet end of the primary combustion zone for detecting the temperature of the combustion gas without flame entering the secondary combustion zone. The inlet end of the secondary combustion zone is provided with a thermocouple 7 for detecting the temperature of the combustion gas after entering the secondary combustion zone, and the outlet of the secondary combustion zone is provided with the thermocouple 7 for detecting the temperature of the mixed gas of the combustion gas and the ammonia fuel after being mixed to form the ammonia fuel mixed gas. Thermocouples 7 may be placed at various locations in the porous tube 8 as desired to facilitate monitoring of temperature changes within the gas mixing zone 10. A thermocouple 7 is arranged between the catalytic rectifier 13 and the catalytic reaction unit 16 of the catalytic reaction zone 14 and is used for detecting the temperature of the ammonia fuel mixed gas catalyzed by the catalytic rectifier 13, and the temperature of the ammonia fuel, the combustion gas and the mixed temperature of the ammonia fuel and the combustion gas can be more accurately controlled by arranging a plurality of thermocouples 7 so as to control the ammonia fuel mixed gas to be lower than NO in the catalytic reaction zone x Catalytic combustion is performed at the production temperature of (a) to improve combustion stability of ammonia fuel and reduce production of fuel-type NO from ammonia fuel x Realizing clean use of ammonia fuel. It should be noted that: the thermocouple materials can be arranged according to the temperature ranges of different positions in the ammonia fuel combustion device, and different types of thermocouples are arranged at different positions, such asA high temperature resistant thermocouple.
According to the embodiment of the utility model, the ammonia fuel conveying area is multiple, and each branch pipeline in the ammonia fuel conveying area is uniformly distributed outside the shell 2 in a circumference manner. The number of branch pipes may be changed according to the actual equipment size and requirements, for example, another ammonia fuel delivery area may be provided outside the upper surface of the housing 2 opposite to the ammonia fuel delivery area shown in fig. 1 to supply ammonia fuel to the gas mixing area 10.
FIG. 4 is a schematic diagram of a staged ammonia fuel combustion device in accordance with another embodiment of the present utility model.
As shown in fig. 4, the ammonia fuel combustion device includes a housing 2, a primary combustion zone, a secondary combustion zone, an ammonia fuel delivery zone, and an exhaust gas collection and emission zone 15. The structure and function of each part shown in fig. 4 are substantially the same as those of fig. 1, and the same reference numerals are used to designate the same specific structure and function, and a detailed description thereof will be omitted. The following description is directed to only the differences.
Wherein fig. 4 differs from the apparatus shown in fig. 1 in that the catalytic reaction zone 14 is provided with a plurality of catalytic reaction units 16, the types and/or sizes of the catalysts in the plurality of catalytic reaction units 16 are the same or different. The thermocouple 7 arranged at different positions among the catalytic reaction units 16 of the catalytic reaction zone 14 is used for detecting the gas temperature after catalytic combustion of the ammonia fuel mixed gas, and different types of catalysts are selected according to the gas temperature after catalytic combustion of the catalytic reaction units 16 at different positions in the catalytic reaction zone 14, so that the catalytic effect of the catalytic reaction units 16 in the catalytic reaction zone 14 is improved, and NO is reduced x Is generated. For example: the temperature of the combustion gas generated by the cyclone combustion is higher, so that the catalyst of the secondary combustion zone close to the gas mixing zone can be a high-temperature-resistant catalyst, and the temperature close to the tail gas collecting and discharging zone 15 is lower, so that the catalyst of the tail gas collecting and discharging zone 15 is selected to be suitable for the catalyst with lower temperature, or the whole ammonia fuel combustion device is suitable for the high-temperature-resistant catalyst. Meanwhile, the type and size of the catalyst can be adjusted according to the catalytic combustion reaction temperature, the concentration of the reaction products, the components of the products and the like at different positions of the catalytic reaction zone 14One step control of the reaction degree and reduction of NO x And the cost of the catalyst can be effectively reduced.
According to an embodiment of the present utility model, gaskets are sequentially used for sealing between the blower 1, the cyclone burner 5, the gas mixing zone 10, the catalytic reaction zone 14 and the exhaust gas collecting and discharging zone 15, and flange connection is used. As exemplified by the primary combustion zone, the rectifier 4 between the blower 1 and the swirl burner 5, the rectifier 4 between the swirl burner 5 and the swirl burner 5, and the rectifier 5 between the swirl burner 5 and the gas mixing zone 10 are sealed with gaskets in this order from left to right, and are connected with flanges.
According to an embodiment of the utility model, the way in which the main pipe of the ammonia fuel delivery unit is connected to the plurality of branch pipes 8 comprises welding or flanged connections; the connection of the plurality of branch pipes 11 to the plurality of porous pipes 8 of the gas mixing zone 10 comprises welding or flange connection.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the utility model thereto, but to limit the utility model thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the utility model.
Claims (10)
1. A staged ammonia fuel combustion device comprising:
the shell body is provided with a plurality of grooves,
the primary combustion zone comprises a blower arranged at the front end of the shell and a cyclone burner arranged in the shell, a combustion-supporting gas inlet and an igniter interface are arranged at the inlet of the cyclone burner, and the primary combustion zone is used for enabling the combustion-supporting gas to burn in the cyclone burner to generate combustion gas;
a secondary combustion zone disposed within the housing downstream of the primary combustion zone, comprising a gas mixing zone comprised of a plurality of porous tubes and a plurality of ammonia fuel inlets, and a catalytic reaction zone downstream of the gas mixing zone; and
an ammonia fuel delivery zone disposed outside the housing, the ammonia fuel delivery zone including an ammonia fuel storage tank and a plurality of branch conduits, the ammonia fuel delivery zone being coupled to the gas mixing zone for transporting ammonia fuel from different locations to the gas mixing zone through the plurality of branch conduits,
wherein the ammonia fuel combustion device further comprises:
and the rectifier is arranged between the cyclone burner and the gas mixing zone and is used for extinguishing the flame of the combustion gas generated by the cyclone burner.
2. The ammonia fuel combustion device of claim 1 wherein the catalytic reaction zone is configured to produce NO at a temperature below that of the ammonia fuel gas mixture from the gas mixing zone x Catalytic combustion is carried out at the temperature of the temperature.
3. The ammonia fuel combustion device of claim 1, further comprising: and another rectifier arranged between the cyclone burner and the blower for converting irregularly flowing air sucked by the blower into regularly flowing air.
4. An ammonia fuel combustion device according to claim 1 or 3, further comprising:
the tail gas collecting and discharging area is arranged in the shell, and is arranged at the downstream of the catalytic reaction area, wherein the tail gas collecting and discharging area comprises a tail gas collecting area and a tail gas discharging area, and the tail gas collecting area is provided with a connecting port for connecting smoke analysis equipment.
5. The ammonia fuel combustion device of claim 4, wherein the catalytic reaction zone comprises a catalytic rectifier and catalytic reaction units, one or more catalytic reaction units, and the areas of a plurality of catalytic reaction units are the same or different.
6. The ammonia fuel combustion device of claim 5, further comprising: a plurality of flow meters;
wherein, a flowmeter is arranged at one end of the blower to control the flow rate of the sucked air;
a flowmeter is arranged at the combustion-supporting gas inlet to control the flow rate of the combustion-supporting gas;
the ammonia fuel storage tank is connected with the plurality of branch pipelines through a main pipeline, and a flowmeter is arranged on the main pipeline so as to control the flow of the ammonia fuel;
and the plurality of branch pipelines are provided with flow meters so as to control the flow of ammonia fuel in the branch pipelines at different positions.
7. The ammonia fuel combustion device of claim 6, further comprising: a plurality of thermocouples;
a thermocouple is arranged on a main pipeline of the ammonia fuel conveying area and used for detecting the temperature of the ammonia fuel;
a thermocouple is arranged at the inlet of the cyclone burner and used for detecting the combustion temperature in the cyclone burner;
a thermocouple is arranged at the outlet end of the primary combustion zone and used for detecting the temperature of the combustion gas entering the secondary combustion zone;
the inlet end of the secondary combustion zone is provided with a thermocouple for detecting the temperature of the combustion gas after entering the secondary combustion zone, and the outlet end of the secondary combustion zone is provided with a thermocouple for detecting the temperature of the mixed gas of the combustion gas and the ammonia fuel after being mixed to form the ammonia fuel mixed gas;
a thermocouple is arranged between the catalytic rectifier and the catalytic reaction unit of the catalytic reaction zone and used for detecting the temperature of the ammonia fuel mixed gas after being catalyzed by the catalytic rectifier; and
and a plurality of thermocouples are arranged among the catalytic reaction units and are used for detecting the temperature of the catalytic reaction units after catalysis.
8. The ammonia fuel combustion device of claim 7 wherein the ammonia fuel delivery unit is a plurality of the branch pipes each being circumferentially and evenly distributed outside the housing.
9. The ammonia fuel combustion device of claim 4, wherein gaskets are used for sealing the air blower, the cyclone burner, the gas mixing zone, the catalytic reaction zone and the tail gas collecting and discharging zone in sequence, and the gaskets are connected by flanges.
10. The ammonia fuel combustion device according to claim 7, wherein the main pipe of the ammonia fuel delivery unit is connected to a plurality of the branch pipes by means of welding or flange connection;
the connection mode of the plurality of branch pipelines and the plurality of porous pipelines of the gas mixing zone comprises welding or flange connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321602514.5U CN220186803U (en) | 2023-06-21 | 2023-06-21 | Graded ammonia fuel combustion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321602514.5U CN220186803U (en) | 2023-06-21 | 2023-06-21 | Graded ammonia fuel combustion device |
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| Publication Number | Publication Date |
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| CN220186803U true CN220186803U (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321602514.5U Active CN220186803U (en) | 2023-06-21 | 2023-06-21 | Graded ammonia fuel combustion device |
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| Country | Link |
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| CN (1) | CN220186803U (en) |
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2023
- 2023-06-21 CN CN202321602514.5U patent/CN220186803U/en active Active
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