CN114811582A - Double-swirl low-nitrogen combustor - Google Patents
Double-swirl low-nitrogen combustor Download PDFInfo
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- CN114811582A CN114811582A CN202210436998.4A CN202210436998A CN114811582A CN 114811582 A CN114811582 A CN 114811582A CN 202210436998 A CN202210436998 A CN 202210436998A CN 114811582 A CN114811582 A CN 114811582A
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- 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
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
- F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
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Abstract
The invention discloses a double-cyclone low-nitrogen burner, which comprises: the device comprises a first shell, wherein an airflow conveying assembly is arranged in the first shell, the airflow conveying assembly divides a cavity in the first shell into a combustion-supporting chamber and a combustion chamber, the combustion-supporting chamber is communicated with a first combustion-supporting air inlet, and the combustion chamber is provided with a combustion port; the gas flow conveying assembly comprises a combustion-supporting gas cyclone component and a fuel injection head, wherein the combustion-supporting gas cyclone component is provided with a first-stage cyclone area and a second-stage cyclone area which are annular, and the fuel injection head is arranged in the middle of the first-stage cyclone area and is convexly arranged on one side of the combustion chamber; the primary cyclone area is provided with a plurality of primary cyclone channels which are annularly arranged at intervals; the second-stage rotational flow area is provided with a plurality of second-stage rotational flow channels which are arranged at intervals in an annular mode. The invention utilizes the ammonia fuel to be capable of cracking and reacting partial ammonia gas into hydrogen and ammonia gas under the condition of high temperature and oxygen deficiency and then to burn, thereby greatly reducing the generation amount of fuel type nitrogen oxides and realizing low-nitrogen combustion.
Description
Technical Field
The invention relates to the technical field of combustion equipment, in particular to a double-cyclone low-nitrogen combustor.
Background
At present, the 'hydrogen' energy is considered as an important direction of the development of global energy structures in the future, ammonia is used as a high-efficiency zero-carbon carrier of hydrogen, the mass hydrogen content is as high as 17.6%, the ammonia can be liquefied at normal temperature by 8atm, the industrial chain of preparation, storage and transportation is mature, and the energy density of the liquid ammonia is 18.8MJ/kg, so that the ammonia is the zero-carbon fuel which has the highest potential to replace the traditional fossil energy and is applied to industrial thermal equipment such as power boilers, industrial furnaces, internal combustion engines, gas turbines and the like. The ammonia has the advantage of no carbon, the emission after complete combustion is only water and nitrogen, and the ammonia is used as a carbon-free fuel and has the advantages of high heat value, easy storage and the like. However, when ammonia is used as fuel, the emission of nitrogen oxides during combustion is greatly increased due to the fact that ammonia contains fuel nitrogen, and environmental pollution is caused.
Disclosure of Invention
The present invention is directed to a dual-swirl low-nitrogen burner, which solves one or more of the problems of the prior art and provides at least one of the advantages of the dual-swirl low-nitrogen burner.
The technical scheme adopted for solving the technical problems is as follows:
the invention provides a double-cyclone low-nitrogen burner, which comprises: the device comprises a first shell, wherein an airflow conveying assembly is arranged in the first shell, the airflow conveying assembly divides a cavity in the first shell into a combustion-supporting chamber and a combustion chamber, the combustion-supporting chamber is communicated with a first combustion-supporting air inlet, and the combustion chamber is provided with a combustion port; the gas flow conveying assembly comprises a combustion-supporting gas cyclone component and a fuel injection head, wherein the combustion-supporting gas cyclone component is provided with a primary cyclone area and a secondary cyclone area which are annular, the primary cyclone area and the secondary cyclone area are coaxial and arranged at intervals inside and outside, and the fuel injection head is arranged in the middle of the primary cyclone area and is convexly arranged on one side of the combustion chamber; the primary cyclone area is provided with a plurality of primary cyclone channels which are annularly arranged at intervals, the primary cyclone channels are spirally arranged along the ventilation direction, and the primary cyclone through holes are communicated with the combustion-supporting chamber and the combustion chamber; the secondary cyclone area is provided with a plurality of secondary cyclone channels which are arranged at intervals in an annular mode, the secondary cyclone channels are arranged in a spiral mode along the ventilation direction, and the secondary cyclone through holes are communicated with the combustion-supporting chamber and the combustion chamber.
The invention has the beneficial effects that:
during the use, combustion-supporting gas gets into combustion-supporting cavity through first combustion-supporting air inlet, get into the combustion chamber through one-level whirl passageway and second grade whirl passageway respectively, ammonia fuel sprays through the fuel injection head simultaneously, in ammonia fuel spun in-process, some fuel can mix the burning with the primary air of one-level whirl passageway, form the high temperature region after burning the certain time, because the oxygen in the primary air of one-level whirl passageway is limited in this high temperature region, lead to remaining part ammonia fuel to become hydrogen and nitrogen gas because of the oxygen deficiency schizolysis reaction, hydrogen is toward expanding outward and mixes complete combustion with the secondary air of second grade whirl passageway, and consume the oxygen in the secondary air, reduce the formation volume of nitrogen oxide. In addition, the first-stage cyclone channel and the second-stage cyclone channel are spirally arranged along the ventilation direction, and the combustion-supporting gas is spirally discharged, so that the mixture of the combustion-supporting gas and the ammonia fuel is more uniform, and the combustion is more sufficient and stable. The invention utilizes the ammonia fuel to be capable of cracking partial ammonia gas to react into hydrogen and ammonia gas under the condition of high temperature and oxygen deficiency and then burn, thereby greatly reducing the generation amount of fuel type nitrogen oxides, realizing low-nitrogen combustion and greatly reducing the emission of the nitrogen oxides.
As the further improvement of above-mentioned technical scheme, the fuel injection head periphery wall is provided with a plurality of fuel nozzle, and is a plurality of the fuel nozzle is that annular interval sets up the periphery wall of fuel injection head, ammonia fuel along fuel injection head's radial blowout, with the burning of a wind intensive mixing, in time produce the high temperature condition, promote the ammonia decomposition to become the hydrogen burning.
As a further improvement of the technical scheme, an annular baffle is arranged between the primary cyclone area and the secondary cyclone area, one side of the baffle, which faces the combustion chamber, is connected with a cylindrical blocking shell, and the primary cyclone area and the fuel injection head are arranged in the blocking shell.
A high-temperature reflux area is formed in the baffle shell, so that a small part of ammonia gas is combusted in the high-temperature reflux area to form a high-temperature condition, the ammonia gas is promoted to be decomposed into hydrogen gas, and the direct combustion amount of the ammonia gas is reduced.
As a further improvement of the above technical solution, the fuel injection head is provided with a plurality of first fuel injection ports and a plurality of second fuel injection ports, the plurality of first fuel injection ports are annularly arranged at intervals on the outer peripheral wall of the fuel injection head, the plurality of second fuel injection ports are annularly arranged at intervals on the end surface of the fuel injection head, and the ejection direction of the second fuel injection ports is inclined outward. The blocking shell is internally provided with a low oxygen region, so that primary air and fuel are fully mixed due to the arrangement of the first fuel nozzle and the second fuel nozzles, and ammonia gas can be more easily combusted.
As a further improvement of the above technical solution, the ventilation volume of the primary cyclone passage is smaller than the ventilation volume of the secondary cyclone passage. The ventilation volume of the primary cyclone channel mainly ensures that ammonia gas is combusted to generate a high-temperature condition, so that the ammonia gas is decomposed into hydrogen, the direct combustion volume of the ammonia gas is reduced, and the generation of nitrogen oxides is reduced, so that the ventilation volume of the primary cyclone channel is relatively small.
As a further improvement of the technical scheme, the distance between the coaxial inner part and the outer part of the primary cyclone area and the coaxial inner part of the secondary cyclone area is more than 50mm, and the ventilation of the primary cyclone accounts for 13 to 17 percent of the total ventilation. The interval is more than 50mm, and the fuel burning needs a certain time to generate high temperature condition, so that a large amount of ammonia gas is avoided being directly used as fuel. The primary cyclone has a ventilation of 13% to 17% of the total ventilation, which contributes to the direct combustion of part of the ammonia gas and to the decomposition of the majority of the ammonia.
As a further improvement of the above technical solution, the first-stage swirling area is provided with an annular rotatable first-stage impeller, the first-stage impeller is provided with a plurality of first-stage swirling blades arranged at annular intervals, the first-stage swirling channel is formed between every two adjacent first-stage swirling blades, the second-stage swirling area is provided with an annular rotatable second-stage impeller, the second-stage impeller is provided with a plurality of second-stage swirling blades arranged at annular intervals, and the second-stage swirling channel is formed between every two adjacent second-stage swirling blades. The primary air and the secondary air are fully mixed with the ammonia fuel, so that the combustion is more complete.
As the further improvement of the technical scheme, the double-cyclone low-nitrogen burner further comprises a second shell, the second shell is arranged in the combustion-supporting cavity, the second shell divides the combustion-supporting cavity into an inner cavity and an outer cavity, the inner cavity is communicated with the first-stage cyclone zone, the outer cavity is communicated with the second-stage cyclone zone, the first combustion-supporting air inlet is communicated with the outer cavity, the inner cavity is provided with a second combustion-supporting air inlet, the ventilation volume of the inner cavity and the outer cavity can be directly controlled, namely the primary air volume and the secondary air volume are directly controlled, and further the quantity of most of ammonia gas directly combusted is controlled.
As a further improvement of the above technical solution, the first combustion-supporting air inlet is communicated with a first air inlet pipe, the second combustion-supporting air inlet is communicated with a second air inlet pipe, the first air inlet pipe is connected with a first control valve, and the second air inlet pipe is communicated with a second control valve.
The sizes of the primary air quantity and the secondary air quantity can be adjusted according to the increase of the quantity of the nitrogen oxides so as to find out a proper air inflow proportion, and the quantity of the nitrogen oxides is small.
As a further improvement of the above technical solution, the first casing is a cylindrical casing, the two ends of the cylindrical casing are respectively a first end and a second end, the first end is closed, the second end is opened, the air flow conveying assembly is arranged in the cylindrical casing to divide the cylindrical casing into a combustion chamber and a combustion chamber, the first combustion-supporting air inlet is arranged on the side wall of the cylindrical casing, the burner port is arranged at the second end, the cylindrical casing can enable ammonia fuel and combustion-supporting gas to be mixed more uniformly, and the burner port is arranged at the second end and is helpful for spraying flame.
Drawings
The invention is further described with reference to the accompanying drawings and examples;
FIG. 1 is a schematic structural diagram of an embodiment of a dual-swirl low-nitrogen burner provided by the invention, wherein four arrows respectively show a left direction, a right direction, an upward direction and a downward direction;
FIG. 2 is a schematic diagram of an embodiment of an airflow delivery assembly of the dual cyclone low-NOx burner provided by the present invention, wherein four arrows indicate left, right, up and down directions, respectively;
FIG. 3 is a right side view of an embodiment of a dual swirl low NOx burner provided in accordance with the present invention;
FIG. 4 is a schematic structural diagram of an embodiment of a dual-swirl low-NOx burner provided by the invention, wherein four arrows respectively show a left direction, a right direction, an upward direction and a downward direction;
FIG. 5 is an enlarged view of A in FIG. 4;
FIG. 6 is a schematic structural diagram of an embodiment of a dual-swirl low-NOx burner provided by the invention, wherein four arrows respectively show a left direction, a right direction, an upward direction and a downward direction;
fig. 7 is a schematic structural diagram of an embodiment of a dual-swirl low-nitrogen burner provided by the invention, wherein four arrows respectively represent a left direction, a right direction, an upward direction and a downward direction.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 to 7, a dual cyclone low-nitrogen burner of the present invention. The invention utilizes the ammonia fuel to be capable of cracking partial ammonia gas to react into hydrogen and ammonia gas under the condition of high temperature and oxygen deficiency and then burn, thereby greatly reducing the generation amount of fuel type nitrogen oxides, realizing low-nitrogen combustion and greatly reducing the emission of the nitrogen oxides. The problem of a large amount of nitrogen oxides are discharged in the combustion process of the traditional ammonia fuel combustion structure is solved, and the pollution to the environment is reduced. Simultaneously a double-cyclone low-nitrogen burner of this application simple structure only needs simply to change double-cyclone low-nitrogen burner on current furnace can use this technique, does not design the change in other aspects of combustion system, and the method is simple, and the effect is obvious, effectively reduces the working costs and the equipment cost that adopts other technical means to drop into for reaching the ammonia fuel surely fires the low nitrogen purpose. The following specifically describes the structure of the present application.
Referring to fig. 1, in an embodiment, a dual cyclone low-nitrogen burner includes a first housing 100, the first housing 100 is a cylindrical housing, two ends of the cylindrical housing are respectively a first end and a second end, the first end is disposed in a closed manner, the second end is disposed in an open manner, an air flow conveying assembly 200 is disposed in the cylindrical housing to divide the cylindrical housing into a combustion supporting chamber 110 and a combustion chamber 120, a first combustion supporting air inlet 113 is disposed in a side wall of the cylindrical housing, the combustion supporting chamber 110 is communicated with the first combustion supporting air inlet 113, the combustion chamber 120 is provided with a combustion port 121, the combustion port 121 is disposed at the second end, the cylindrical housing can enable ammonia fuel and combustion supporting gas to be mixed more uniformly, and the stable combustion of the ammonia fuel is facilitated, and the combustion port 121 is disposed at the second end and is in accordance with an air flow conveying direction, which facilitates the injection of flames. During the in-service use, the low nitrogen combustor of two whirl sets up in the furnace lateral wall, and burner port 121 is towards in the furnace, and flame directly spouts in the furnace through the burner port. And a plurality of general double-cyclone low-nitrogen burners are arranged, the first combustion-supporting air inlet 113 is arranged on the side wall of the cylindrical shell, and the combustion-supporting chamber 110 of the double-cyclone low-nitrogen burner can be arranged to be communicated with each other and simultaneously control air inlet.
Referring to fig. 2 and 3, the airflow delivery assembly 200 is described in detail. The gas flow conveying assembly 200 comprises a combustion-supporting gas cyclone component and a fuel injection head 210, wherein the combustion-supporting gas cyclone component is provided with a primary cyclone area 220 and a secondary cyclone area 230 which are annular, the primary cyclone area 220 and the secondary cyclone area 230 are coaxial and arranged at intervals inside and outside, the fuel injection head 210 is arranged in the middle of the primary cyclone area 220 and is convexly arranged on one side of the combustion chamber 120, the fuel injection head 210 is connected with a fuel pipe, the fuel pipe is connected with a third control valve, fuel feeding is controlled through the third control valve, and in practice, the fuel injection head 210 is also an ammonia spray gun injection head; the primary cyclone area 220 is provided with a plurality of primary cyclone channels which are annularly arranged at intervals, and the primary cyclone through holes are communicated with the combustion-supporting chamber 110 and the combustion chamber 120; the secondary cyclone area 230 is provided with a plurality of primary cyclone channels arranged at intervals in a ring shape, and the secondary cyclone through holes are communicated with the combustion-supporting chamber 110 and the combustion chamber 120.
When the combustion-supporting device is used, gas enters the combustion-supporting chamber 110 through the first combustion-supporting air inlet 113, and respectively enters the combustion chamber 120 through the first-stage cyclone channel and the second-stage cyclone channel, meanwhile, fuel is sprayed through the fuel spray head 210, because oxygen in primary air of the first-stage cyclone channel is limited, part of the fuel is mixed and combusted with primary air of the first-stage cyclone channel, a high-temperature environment is formed after the fuel is combusted for a certain time, and the rest of the fuel is partially cracked and reacted into hydrogen and ammonia due to oxygen deficiency until the hydrogen and the ammonia are mixed and completely combusted with secondary air of the second-stage cyclone channel. The first-stage cyclone channel and the second-stage cyclone channel are spirally arranged along the ventilation direction, the cyclone directions of the first-stage cyclone channel and the second-stage cyclone channel are consistent, the combustion-supporting gas is spirally discharged, the mixture of the combustion-supporting gas and the ammonia fuel is more uniform, and the combustion is more sufficient and stable.
And a certain combustion time and space are needed for the combustion of part of the fuel in a high-temperature area, so that a baffle 240 is arranged between the primary cyclone area 220 and the secondary cyclone area 230, namely when the primary cyclone area 220 and the secondary cyclone area 230 are coaxial and need a certain interval between the inside and the outside, and when the interval is more than 50mm, part of ammonia gas can be mixed with primary air to be combusted to generate a high-temperature environment, so that the ammonia gas is decomposed into hydrogen gas, and the direct combustion amount of the ammonia gas is reduced.
For part ammonia can and the primary air misce bene, fuel injection head 210 periphery wall is provided with a plurality of fuel spout 211, and a plurality of fuel spout are the annular interval and set up the periphery wall at fuel injection head 210, and ammonia fuel is along fuel injection head 210's radial blowout, and with the intensive mixing burning of primary air, in time produce the high temperature condition, promote the ammonia to decompose into the hydrogen burning, the burning is also more stable.
In other embodiments, referring to fig. 4, a baffle 250 may be further provided to isolate the high temperature backflow region, a cylindrical baffle 250 is connected to a side of the baffle 240 facing the combustion chamber 120, and the primary swirl region 220 and the fuel injection head 210 are disposed in the baffle 250. A high-temperature reflux area is formed in the baffle shell 250, so that a small part of ammonia gas is combusted in the high-temperature reflux area to form a high-temperature condition, the ammonia gas is promoted to be decomposed into hydrogen gas, and the direct combustion amount of the ammonia gas is reduced.
Further, since the baffle case 250 is provided, it is possible to reduce the ammonia gas from directly contacting a large amount of oxygen gas, and as shown in fig. 5, the outer peripheral wall of the fuel injection head 210 is provided with the plurality of first fuel injection ports 212 and the plurality of second fuel injection ports 213, the plurality of first fuel injection ports 212 are annularly provided at intervals on the outer peripheral wall of the fuel injection head 210, the plurality of second fuel injection ports 213 are annularly provided at intervals on the end surface of the fuel injection head 210, and the ejection direction of the second fuel injection ports 213 is inclined outward, so that the primary air and the fuel are sufficiently mixed, and the combustion of the ammonia gas is facilitated.
Further, the primary cyclone area 220 is provided with an annular rotatable primary impeller, the primary impeller is provided with a plurality of primary cyclone blades 221 arranged at intervals in an annular shape, a primary cyclone channel is formed between two adjacent primary cyclone blades 221, the secondary cyclone area 230 is provided with an annular rotatable secondary impeller, the secondary impeller is provided with a plurality of secondary cyclone blades 231 arranged at intervals in an annular shape, and a secondary cyclone channel is formed between two adjacent secondary cyclone blades 231. The primary air and the secondary air are fully mixed with the ammonia fuel, so that the combustion is more complete. The primary air and the secondary cyclone blade 231 are adjustable in angle, the blade angle adjustable range of the blade angle is 40 degrees to 50 degrees, the specific angle is selected according to the actual structure and the size of the structure, the primary cyclone blade 221 and the secondary cyclone blade 231 enable air outlet and ammonia fuel to be fully mixed twice, and combustion is more sufficient. In other embodiments, the first-stage cyclone channel and the second-stage cyclone channel may also be fixed spiral channels with a certain air outlet angle, and also have a cyclone air outlet effect.
It can be understood that the ventilation of the primary cyclone passage is smaller than that of the secondary cyclone passage, and the generation amount of nitrogen oxides is less. The ventilation volume of the primary cyclone channel mainly ensures that ammonia gas is combusted to generate a high-temperature condition, so that the ammonia gas is decomposed into hydrogen, the direct combustion volume of the ammonia gas is reduced, and the generation of nitrogen oxides is reduced, so that the ventilation volume of the primary cyclone channel is relatively small. Specifically, the coaxial internal and external intervals of the primary cyclone area 220 and the secondary cyclone area 230 are larger than 50mm, and the fuel combustion needs a certain time to generate a high-temperature condition, so that a large amount of ammonia is prevented from being directly used as fuel. The primary cyclone has a draft of 13% to 17% of the total draft, which contributes to the direct combustion of part of the ammonia gas and also to the decomposition of the majority of the ammonia.
In order to reduce the generation of nitrogen oxides as much as possible and control the proportion of the ventilation volume, referring to fig. 4 and fig. 7, an embodiment is further provided, in which a second casing 300 is additionally arranged in the dual cyclone low-nitrogen burner, the second casing 300 is cylindrical, the second casing 300 is arranged in the combustion-supporting chamber 110, the second casing 300 divides the combustion-supporting chamber 110 into an inner chamber 111 and an outer chamber 112, the inner chamber 111 is communicated with the primary cyclone zone 220, the outer chamber 112 is communicated with the secondary cyclone zone 230, the first combustion-supporting air inlet 113 is communicated with the outer chamber 112, the inner chamber 111 is provided with a second combustion-supporting air inlet 310, that is, the sizes of the primary air volume and the secondary air volume are directly controlled, and further, the direct combustion quantity of most ammonia gas is controlled.
Further, the first combustion-supporting air inlet 113 is communicated with a first air inlet pipe 400, the second combustion-supporting air inlet 310 is communicated with a second air inlet pipe 500, the first air inlet pipe 400 is connected with a first control valve, and the second air inlet pipe 500 is communicated with a second control valve. The sizes of the primary air volume and the secondary air volume can be adjusted according to the increase of the quantity of the nitrogen oxides so as to find out a proper ventilation ratio and reduce the quantity of the nitrogen oxides. The first control valve and the second control valve can be set to be automatically controlled electric valves, and the sizes of the primary air volume and the secondary air volume are dynamically adjusted according to the change of the quantity of the nitrogen oxides in the combustion process, so that the quantity of the nitrogen oxides is small, and the combustion of ammonia fuel is stable.
When the amount of nitrogen oxides increases, the first control valve is controlled to reduce the amount of primary air intake to the combustion chamber 120, or the second control valve is controlled to increase the amount of secondary air intake to the combustion chamber 120, or the air intake to the first control valve and the second control valve is performed simultaneously, and the air injection amount of the fuel injection head 210 can be adjusted to reduce the amount of nitrogen oxides to be measured.
While the preferred embodiments of the present invention have been described in detail, it is to be understood that the invention is not limited to the precise embodiments, and that various equivalent changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A dual swirl low NOx burner comprising:
the device comprises a first shell (100), wherein an airflow conveying assembly (200) is arranged in the first shell (100), the airflow conveying assembly (200) divides a cavity in the first shell (100) into a combustion-supporting chamber (110) and a combustion chamber (120), the combustion-supporting chamber (110) is communicated with a first combustion-supporting air inlet (113), and the combustion chamber (120) is provided with a combustion port (121);
the gas flow conveying assembly (200) comprises a combustion-supporting gas cyclone component and a fuel injection head (210), wherein the combustion-supporting gas cyclone component is provided with a first-stage cyclone area (220) and a second-stage cyclone area (230) which are annular, the first-stage cyclone area (220) and the second-stage cyclone area (230) are coaxial and arranged at intervals inside and outside, and the fuel injection head (210) is arranged in the middle of the first-stage cyclone area (220) and is convexly arranged on one side of the combustion chamber (120);
the primary cyclone area (220) is provided with a plurality of primary cyclone channels which are annularly arranged at intervals, the primary cyclone channels are spirally arranged along the ventilation direction, and the primary cyclone through holes are communicated with the combustion-supporting chamber (110) and the combustion chamber (120);
the secondary cyclone area (230) is provided with a plurality of secondary cyclone channels which are annularly arranged at intervals, the secondary cyclone channels are spirally arranged along the ventilation direction, and the secondary cyclone through holes are communicated with the combustion-supporting chamber (110) and the combustion chamber (120).
2. A dual swirl low nitrogen burner according to claim 1, wherein:
the fuel injection head (210) periphery wall is provided with a plurality of fuel spout (211), and is a plurality of fuel spout (211) are the annular interval and set up the periphery wall of fuel injection head (210).
3. A dual swirl low nitrogen burner according to claim 1, wherein:
an annular baffle plate (240) is arranged between the primary cyclone area (220) and the secondary cyclone area (230), one side of the baffle plate (240) facing the combustion chamber (120) is connected with a cylindrical retaining shell (250), and the primary cyclone area (220) and the fuel injection head (210) are arranged in the retaining shell (250).
4. A dual swirl low nitrogen burner according to claim 3, wherein:
the fuel injection head (210) is provided with a plurality of first fuel nozzle orifices (212) and a plurality of second fuel nozzle orifices (213), and is a plurality of first fuel nozzle orifices (212) are the annular interval set up in the periphery wall of fuel injection head (210), and a plurality of second fuel nozzle orifices (213) are the annular interval and set up in the terminal surface of fuel injection head (210), the blowout direction of second fuel nozzle orifices (213) is toward outer slope setting.
5. A dual swirl low nitrogen burner according to claim 1, wherein:
the ventilation of the primary cyclone area (220) is smaller than the ventilation of the secondary cyclone area (230).
6. A dual swirl low nitrogen burner according to claim 5, wherein:
the distance between the primary cyclone area (220) and the secondary cyclone area (230) is larger than 50mm, and the ventilation of the primary cyclone area (220) is 13-17% of the total ventilation of the primary cyclone area (220) and the secondary cyclone area (230).
7. A dual swirl low nitrogen burner according to claim 1, wherein:
the annular rotatable first-stage impeller is arranged in the first-stage cyclone area (220), the first-stage impeller is provided with a plurality of first-stage cyclone blades (221) which are arranged at intervals in an annular shape, a first-stage cyclone channel is formed between every two adjacent first-stage cyclone blades (221), the annular rotatable second-stage impeller is arranged in the second-stage cyclone area (230), the second-stage impeller is provided with a plurality of second-stage cyclone blades (231) which are arranged at intervals in an annular shape, and a second-stage cyclone channel is formed between every two adjacent second-stage cyclone blades (231).
8. A dual swirl low nitrogen burner according to claim 1, wherein:
the double-swirl low-nitrogen combustor further comprises a second shell (300), wherein the second shell (300) is arranged in the combustion-supporting chamber (110), the second shell (300) divides the combustion-supporting chamber (110) into an inner chamber (111) and an outer chamber (112), the inner chamber (111) is communicated with the primary swirl area (220), the outer chamber (112) is communicated with the secondary swirl area (230), the first combustion-supporting air inlet (113) is communicated with the outer chamber (112), and the inner chamber (111) is provided with a second combustion-supporting air inlet (310).
9. A dual swirl low nitrogen burner according to claim 8, wherein:
the first combustion-supporting air inlet (113) is communicated with a first air inlet pipe (400), the second combustion-supporting air inlet (310) is communicated with a second air inlet pipe (500), the first air inlet pipe (400) is connected with a first control valve, and the second air inlet pipe (500) is communicated with a second control valve.
10. A dual cyclone low-nitrogen burner as claimed in any one of claims 1 to 9, wherein:
first casing (100) are cylindric casing, the both ends of cylindric casing are first end and second end respectively, first end seals the setting, the second end opens the setting, air flow conveying subassembly (200) set up in will in the cylindric casing is divided into combustion-supporting cavity (110) and combustion chamber (120), first combustion-supporting air inlet (113) set up cylindric casing's lateral wall, burner port (121) set up in the second end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210436998.4A CN114811582A (en) | 2022-04-24 | 2022-04-24 | Double-swirl low-nitrogen combustor |
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| CN202210436998.4A CN114811582A (en) | 2022-04-24 | 2022-04-24 | Double-swirl low-nitrogen combustor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379426A (en) * | 2023-06-06 | 2023-07-04 | 佛山仙湖实验室 | Reverse jet ammonia burner |
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2022
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116379426A (en) * | 2023-06-06 | 2023-07-04 | 佛山仙湖实验室 | Reverse jet ammonia burner |
| CN116379426B (en) * | 2023-06-06 | 2023-08-08 | 佛山仙湖实验室 | Reverse jet ammonia burner |
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