CN110513887B - Ultra-low nitrogen emission gas hot air furnace - Google Patents
Ultra-low nitrogen emission gas hot air furnace Download PDFInfo
- Publication number
- CN110513887B CN110513887B CN201910876295.1A CN201910876295A CN110513887B CN 110513887 B CN110513887 B CN 110513887B CN 201910876295 A CN201910876295 A CN 201910876295A CN 110513887 B CN110513887 B CN 110513887B
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- air
- fuel gas
- blast stove
- combustion chamber
- combustion
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Classifications
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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
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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
- F23D14/46—Details
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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
- F23D14/46—Details
- F23D14/70—Baffles or like flow-disturbing devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1881—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/06041—Staged supply of oxidant
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Abstract
The invention discloses an ultralow nitrogen emission gas hot-blast stove, which is characterized in that: the hot-blast stove comprises a hot-blast stove body and a thick-thin burner, wherein the hot-blast stove body is a cylinder, and the thick-thin burner is positioned at one end of the cylinder and is integrated with the hot-blast stove body. According to the invention, the hot blast stove and the thick and thin burner are used as an integral combustion device to carry out low-nitrogen design, the flame is divided and combusted through the gas spray holes, a plurality of small torches are divided and combusted under the condition of oxygen deficiency, the smoke generated by oxygen deficiency combustion enters a hearth to be mixed into 2 times of air and then is subjected to dispersion combustion with the rest of fuel, and the condition of generating nitrogen oxides by each combustion is destroyed, so that the generated NOX emission is very low, the outlet temperature can be controlled within the range of 150-900 ℃, and the NOX of the smoke emission is less than 30mg/m 3.
Description
Technical Field
The invention relates to an industrial gas flue gas hot-blast stove, which is a device taking burning flue gas as a heat source, and mainly aims to provide a heat source for drying and heating enterprises in steelworks, smelting plants, cement production industries and the like and flue gas emission pretreatment systems in various industries.
Background
The boiler atmospheric pollutant emission standard is specified by referring to the latest national standard GB 13271-2012: the NOx emission of the newly built gas boiler cannot exceed 200mg/m (100 ppm), and the important area cannot exceed 150mg/m (75 ppm). With the improvement of the national environmental protection requirement on NOx emission, the national environmental protection requirements on NOx emission are met by the local boiler standard, such as Beijing, zhengzhou and the like, the emission of nitrogen oxides cannot exceed 30mg, and the existing gas flue gas hot blast stove in industry cannot meet the requirements. In order to reduce NOx emissions from the source, it is necessary to develop a burner and stove integrated stove with ultra low nitrogen emissions stove.
Disclosure of Invention
The invention aims to provide a hot-blast stove with ultralow nitrogen oxide content in discharged flue gas, which utilizes the technologies of flame cutting, oxygen concentration, staged combustion and the like, has simple structure and maintenance, can control the outlet temperature to be in the range of 150-900 ℃ and has the flue gas discharge NOX less than 30mg/m 3.
The technical scheme adopted by the invention is as follows: an ultralow nitrogen emission gas hot-blast furnace, its characterized in that: the hot-blast stove comprises a hot-blast stove body and a thick-thin burner, wherein the hot-blast stove body is a cylinder, and the thick-thin burner is positioned at one end of the cylinder and is integrated with the hot-blast stove body.
The invention discloses a thick and thin burner which consists of an air inlet, an air duct, an air box, a combustion air adjusting device, a fuel gas distribution bag, a fuel gas inlet, a fuel gas distribution pipe, a primary fuel gas and air distribution hole device, a secondary fuel gas and air distribution hole device, a combustion chamber and a hearth, wherein the fuel gas inlet, the fuel gas distribution bag, the air box, the combustion air adjusting device and the fuel gas distribution pipe are positioned at one end of a cylinder, the air inlet is positioned at the other end of the cylinder, the combustion chamber and the hearth are positioned in the cylinder, the air duct is a gap between the combustion chamber and the hearth and a hot blast stove shell, the air duct is divided into two outlets at the combustion chamber, one outlet is connected with the air box, the other outlet is connected with the combustion chamber, the primary fuel gas and air distribution hole device is vertically arranged between the combustion air adjusting device and the combustion chamber, and the secondary fuel gas and air distribution hole device is arranged between the air duct and the combustion chamber.
The air flow disturbance device is arranged between the combustion chamber and the hearth, so that residual air in the combustion chamber and the smoke after lean-oxygen combustion are mixed and enter the hearth.
The gas and air distribution hole device is uniformly provided with air spray holes and gas spray holes, and the distribution of the air spray holes and the gas spray holes is that one row of gas spray holes correspond to two exhaust gas spray holes in a staggered mode.
The invention designs the thick and thin burner on the furnace end of the hot blast stove, the fuel gas and the air are designed into a plurality of small Kong Penru combustion chambers, the fuel gas and the air sprayed out from each small hole are mixed in the combustion chamber to form a plurality of small flames, thus cutting a large flame into hundreds of thousands of small flames; the air is divided into 2 air flows before entering the combustion chamber, one air flow enters the combustion chamber after flow control, the whole combustion chamber is in an oxygen-deficient state, and as the fuel is in the oxygen-deficient state just after combustion, the oxygen content is low, so that the flame temperature is low, and the generation amount of nitrogen oxides of the temperature type and the fuel type is low; the mixed gas of fuel and smoke which is not completely combusted enters the hearth and is mixed with the other air, and then the mixed gas is combusted, so that the air and the smoke quantity are particularly high, and the combustion temperature is also low due to the fact that the air is excessive, the generation quantity of temperature type nitrogen oxides can be reduced, and the nitrogen oxides generated by the invention are correspondingly particularly low.
According to the invention, the hot blast stove and the thick and thin burner are used as an integral combustion device to carry out low-nitrogen design, the flame is divided and combusted through the gas spray holes, a plurality of small torches are divided and combusted under the condition of oxygen deficiency, the smoke generated by oxygen deficiency combustion enters a hearth to be mixed into 2 times of air and then is subjected to dispersion combustion with the rest of fuel, and the condition of generating nitrogen oxides by each combustion is destroyed, so that the generated NOX emission is very low, the outlet temperature can be controlled within the range of 150-900 ℃, and the NOX of the smoke emission is less than 30mg/m 3.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a gas and air jet orifice distribution diagram of the present invention;
in fig. 1, air inlet; 2. an air duct; 3. a wind box; 4. a combustion air conditioning device; 5. a gas distribution package; 6. a gas inlet; 7. a gas distribution pipe; 8. primary gas and air distribution hole means; 9. secondary fuel gas and air distribution hole device; 10. a combustion chamber; 11. an air flow disturbance device; 12. a furnace; 13. an air jet orifice; 14. and (5) a fuel gas spray hole.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description:
the invention has the advantages that the structures of all the parts are independent, all the parts are connected in a split and combination mode, and the air and the fuel gas are mixed in proportion between the air multiple distributor and the fuel gas distribution package to leave enough space, the air and the fuel gas are unified into the same channel and enter the combustion chamber first, and after the first combustion in the combustion chamber, the fuel enters a hearth for secondary combustion, and under the corresponding working condition, the emission standard of the flue gas nitrogen oxides is reached in advance, and the subsequent nitrogen oxide adding and emission reduction equipment is solved, so that the purposes of high efficiency, energy conservation and consumption reduction are achieved.
The structural and arrangement features of the present invention are further described below:
As can be seen from fig. 1, the invention relates to an ultralow nitrogen emission gas combustion hot blast stove, which comprises a hot blast stove and a thick-thin burner, wherein the main body of the hot blast stove is a cylinder, and the thick-thin burner is positioned at one end of the cylinder and is integrated with the main body of the hot blast stove. The thick and thin combustor comprises an air inlet 1, an air flue 2, an air box 3, a combustion air adjusting device 4, a fuel gas distribution bag 5, a fuel gas inlet 6, a fuel gas distribution pipe 7, a primary fuel gas and air distribution hole device 8, a secondary fuel gas and air distribution hole device 9, a combustion chamber 10, an air flow disturbance device 11, a hearth 12, 13 air spray holes and 14 fuel gas spray holes, wherein the fuel gas inlet, the fuel gas distribution bag, the air box, the combustion air adjusting device and the fuel gas distribution pipe are positioned at one end of a cylinder, the air inlet is positioned at the other end of the cylinder, the combustion chamber and the hearth are positioned in the cylinder, the air flue is a gap between the combustion chamber and a shell of the combustion chamber and the hot blast stove, the air flue is divided into two outlets at the combustion chamber, one outlet is connected with the air box, the other outlet is connected with the combustion chamber, the primary fuel gas and the air distribution hole device is vertically arranged in the combustion chamber, and the secondary fuel gas and the air distribution hole device is arranged between the air flue and the combustion chamber. The gas and air distribution hole device is uniformly provided with air spray holes and gas spray holes, and the distribution of the air spray holes and the gas spray holes is that one row of gas spray holes correspond to two exhaust gas spray holes in a staggered mode.
The air is connected to the air inlet 1 and then flows to the bellows 3 through the air duct 2, a jet of air passes through the combustion air conditioning device 4 and then flows from hundreds of air small Kong Penru combustion chambers 10 on the primary gas and air distribution hole device 8, meanwhile, the gas enters the gas distribution bag 5 through the gas inlet 6 and is distributed to hundreds of gas small Kong Penru combustion chambers 10 on the primary gas and air distribution hole device 8 from the gas distribution pipe 7, the whole combustion chamber is in an oxygen-lean state under the regulation of the combustion air conditioning device 4, and the gas is in the oxygen-lean state when being combusted, so that the flame temperature is low due to low oxygen content, and the generation amount of nitrogen oxides of the temperature type and the fuel type is low; the other air and fuel gas are sprayed into the combustion chamber 10 through the secondary fuel gas and air distribution hole device 9, the residual air enters the hearth 12 through the air flow disturbance device 11 and is mixed with the fuel gas after lean oxygen combustion in the combustion chamber 10 to be burnt out continuously, and the air and the fuel gas are particularly high in the combustion process, and the combustion temperature is also lower due to the fact that the air is excessive greatly, so that the generation amount of temperature type nitrogen oxides can be reduced.
All parts of the thick-thin burner are welded and formed, the appearance of the whole product is a single cylinder, no complex external belt part exists, the appearance is concise and attractive, and the practicability is high; meanwhile, the gas distribution package, the gas spray pipe, the air multiple distribution device, the gas multiple distribution device and the combustion chamber are connected into a whole through welding and the main body of the hot blast stove.
The embodiments of the present invention are merely described in terms of preferred embodiments of the present invention, and are not intended to limit the spirit and scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope of the present invention, and the technical contents of the protection of the present invention are all described in the claims.
Claims (2)
1. An ultralow nitrogen emission gas hot-blast furnace, its characterized in that: the hot blast stove comprises a hot blast stove body and a thick-thin burner, wherein the hot blast stove body is a cylinder, the thick-thin burner is positioned at one end of the cylinder, and the thick-thin burner and the hot blast stove body are integrated together: the thick-thin burner consists of an air inlet, an air duct, an air bellows, a combustion air adjusting device, a fuel gas distribution bag, a fuel gas inlet, a fuel gas distribution pipe, a primary fuel gas and air distribution hole device, a secondary fuel gas and air distribution hole device, a combustion chamber and a hearth, wherein the fuel gas inlet, the fuel gas distribution bag, the air bellows, the combustion air adjusting device and the fuel gas distribution pipe are positioned at one end of a cylinder, the air inlet is positioned at the other end of the cylinder, the combustion chamber and the hearth are positioned in the cylinder, the air duct is a gap between the combustion chamber and the hearth and a hot blast stove shell, the air duct is divided into two outlets at the combustion chamber, one outlet is connected with the air bellows, the other outlet is connected with the combustion chamber, the primary fuel gas and air distribution hole device is vertically arranged in the combustion chamber, and the secondary fuel gas and air distribution hole device is arranged between the air duct and the combustion chamber.
2. The ultra-low nitrogen emission gas stove of claim 1, wherein: an airflow disturbance device is arranged between the combustion chamber and the hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876295.1A CN110513887B (en) | 2019-09-17 | 2019-09-17 | Ultra-low nitrogen emission gas hot air furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876295.1A CN110513887B (en) | 2019-09-17 | 2019-09-17 | Ultra-low nitrogen emission gas hot air furnace |
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| Publication Number | Publication Date |
|---|---|
| CN110513887A CN110513887A (en) | 2019-11-29 |
| CN110513887B true CN110513887B (en) | 2024-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910876295.1A Active CN110513887B (en) | 2019-09-17 | 2019-09-17 | Ultra-low nitrogen emission gas hot air furnace |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114754491A (en) * | 2022-05-10 | 2022-07-15 | 黄石市新瑞环保科技有限公司 | Ultralow nitrogen emission gas hot-blast furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201488267U (en) * | 2009-09-03 | 2010-05-26 | 兰州泰得燃烧设备工程有限公司 | Hot blast stove |
| CN110108031A (en) * | 2019-05-30 | 2019-08-09 | 唐山金沙燃烧热能股份有限公司 | A kind of ultralow nitrogen hot-blast stove |
| CN210602281U (en) * | 2019-09-17 | 2020-05-22 | 岳阳远大热能设备有限公司 | Ultralow nitrogen emission gas hot blast stove |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5511971A (en) * | 1993-08-23 | 1996-04-30 | Benz; Robert P. | Low nox burner process for boilers |
| CN108826274A (en) * | 2018-08-24 | 2018-11-16 | 合肥德博生物能源科技有限公司 | A kind of conveying of biological fuel gas and low nitrogen oxide burning device and method |
| CN109099427A (en) * | 2018-10-15 | 2018-12-28 | 北京环科环保技术公司 | A kind of combustion head of burner |
| CN109611842B (en) * | 2019-01-16 | 2025-03-18 | 岳阳远大热能设备有限公司 | Ultra-low nitrogen emission gas burner |
-
2019
- 2019-09-17 CN CN201910876295.1A patent/CN110513887B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201488267U (en) * | 2009-09-03 | 2010-05-26 | 兰州泰得燃烧设备工程有限公司 | Hot blast stove |
| CN110108031A (en) * | 2019-05-30 | 2019-08-09 | 唐山金沙燃烧热能股份有限公司 | A kind of ultralow nitrogen hot-blast stove |
| CN210602281U (en) * | 2019-09-17 | 2020-05-22 | 岳阳远大热能设备有限公司 | Ultralow nitrogen emission gas hot blast stove |
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| CN110513887A (en) | 2019-11-29 |
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Application publication date: 20191129 Assignee: Yueyang Yuanda Electromechanical Equipment Installation Co.,Ltd. Assignor: YUEYANG YUANDA HEAT ENERGY EQUIPMENT Co.,Ltd. Contract record no.: X2024980045148 Denomination of invention: Ultra low nitrogen emission gas hot blast stove Granted publication date: 20241018 License type: Common License Record date: 20241231 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Yueyang Yuanda Electromechanical Equipment Installation Co.,Ltd. Assignor: YUEYANG YUANDA HEAT ENERGY EQUIPMENT Co.,Ltd. Contract record no.: X2024980045148 Date of cancellation: 20251107 |