CN111947141B - Adjustable wind-coal progressive mixing low NOx combustion device - Google Patents
Adjustable wind-coal progressive mixing low NOx combustion device Download PDFInfo
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- CN111947141B CN111947141B CN202010811902.9A CN202010811902A CN111947141B CN 111947141 B CN111947141 B CN 111947141B CN 202010811902 A CN202010811902 A CN 202010811902A CN 111947141 B CN111947141 B CN 111947141B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/20—Fuel flow guiding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/01001—Pulverised solid fuel burner with means for swirling the fuel-air mixture
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
An adjustable air-coal progressive mixing combustion device comprises a central air duct, a primary air duct, a rotational flow inner secondary air duct and a direct current outer secondary air duct which are sequentially arranged from inside to outside, wherein a precombustion chamber is arranged at the tail part of each duct along the air flow direction, and a tertiary air duct is arranged outside the precombustion chamber; the annular air flow channel between the primary air pipe and the rotational flow inner secondary air pipe is provided with an air-coal mixing primary regulator which is sleeved outside the primary air pipe, and the annular air flow channel between the rotational flow inner secondary air pipe and the direct current outer secondary air pipe is also provided with an air-coal mixing secondary regulator with the same structure. The mixing time and the mixing position of the primary air carrying the pulverized coal, the secondary air in the rotational flow and the secondary air outside the direct flow are controlled, so that the pulverized coal is ensured to be stably combusted, the production of NOx is obviously reduced, and the coal adaptability of the combustion device is improved.
Description
Technical Field
The invention relates to the technical field of pulverized coal combustion and environmental protection, in particular to an adjustable wind-coal progressive mixing low NOx combustion device.
Background
The basic characteristics of the energy structure in China, namely 'rich coal, lean oil and less gas', mean that coal resources are taken as main energy sources in China. According to statistics of Chinese statistics annual book, the total energy consumption of China in 2017 is 44 hundred million tons of standard coal, wherein the coal accounts for 60.4% of the total energy consumption. But coal is used as an energy source with serious environmental pollution, a large amount of nitrogen oxides, sulfur oxides and particulate matters can be generated in the combustion process, the environmental damage is serious, even acid rain, photochemical pollution and the like can be caused, and the harm to human bodies is great. Therefore, reducing NOx generated during coal combustion has been a major concern for research. NOx generated by coal combustion is classified into a thermal type, a rapid type and a fuel type according to its source. Fuel-type NOx means that during combustion of fuel, nitrogen-containing compounds are oxidized to form a portion of nitrogen oxides; thermal NOx and rapid NOx refer to nitrogen and oxygen in the high temperature air during combustionCan generate nitrogen oxides by oxidation reaction, and NOx generated in the pulverized coal combustion process mainly comprises NO and NO 2 。
In order to reduce NOx generated in the pulverized coal combustion process, the burner mostly adopts a multi-stage air distribution mode to control the combustion condition of pulverized coal, and a central air, a primary air, a secondary air, an overfire air and the like are sequentially arranged from inside to outside. The primary air carries the pulverized coal into the precombustion chamber, and at the moment, the pulverized coal is pyrolyzed and gasified under the anoxic state to generate reducing gas and coke particles because the air quantity of the primary air is smaller; then, the secondary air enters the precombustion chamber and moves for a certain distance along the air flow direction to be mixed with the primary air, oxygen is provided for ignition and combustion of the pulverized coal, and in the process, partial NOx generated by combustion can be reduced into N by reducing gas generated by pyrolysis and gasification of the pulverized coal 2 The NOx emission is reduced, and then the pulverized coal is mixed with the over-fire air, so that the over-fire rate of the pulverized coal is improved. However, the problems that the mixing time of primary air, secondary air and over-fire air is difficult to control can occur in the operation process of the burner, the early mixing can lead to insufficient pyrolysis of coal dust, less reducing gas is generated, and only a small amount of NOx is reduced into N in the combustion process 2 At this time, the NOx emission amount is high; too late mixing can lead to insufficient oxygen and heat required by the pulverized coal in the ignition stage, unstable combustion and even flameout.
Disclosure of Invention
Aiming at the problems existing in the use process of the existing graded air distribution burner, the invention provides an adjustable air-coal step-by-step mixed combustion device, and the mixing time and the mixing position of primary air carrying pulverized coal, secondary air in cyclone and secondary air outside direct current are controlled to ensure stable combustion of the pulverized coal, remarkably reduce the production of NOx and improve the coal type adaptability of the combustion device.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an adjustable wind-coal progressive mixing combustion device comprises a central wind pipe 1, a primary wind pipe 2, a rotational flow inner secondary wind pipe 3 and a direct current outer secondary wind pipe 4 which are sequentially arranged from inside to outside, wherein a precombustion chamber 8 is arranged at the tail part of each wind pipe along the airflow direction, and a tertiary wind pipe 9 is arranged outside the precombustion chamber 8; the annular airflow channel of the rotational flow inner secondary air between the primary air pipe 2 and the rotational flow inner secondary air pipe 3 is provided with an air-coal mixing primary regulator 6, the air-coal mixing primary regulator 6 is sleeved outside the primary air pipe 2, the annular airflow channel of the direct flow outer secondary air between the rotational flow inner secondary air pipe 3 and the direct flow outer secondary air pipe 4 is also provided with an air-coal mixing secondary regulator 7 with the same structure, and the air-coal mixing secondary regulator 7 is sleeved outside the rotational flow inner secondary air pipe 3.
The wind-coal mixing primary regulator 6 and the wind-coal mixing secondary regulator 7 have the same structure and comprise a fixed ring 10 and a wind regulating ring 11, the fixed ring 10 of the wind-coal mixing primary regulator 6 is tightly attached to the outer wall of the primary wind pipe 2, the fixed ring 10 of the wind-coal mixing secondary regulator 7 is tightly attached to the outer wall of the secondary wind pipe 3 in the rotational flow, and the fixed ring 10 and the wind regulating ring 11 are connected into a whole.
The wind adjusting ring 11 is flared along the airflow direction and is used for changing the airflow direction.
The wind-coal mixing primary regulator 6 and the wind-coal mixing secondary regulator 7 are of annular structures.
The outer wall surfaces of the primary air duct 2 and the cyclone inner secondary air duct 3 are provided with threaded guide rails 5.
The screw guide 5 is connected with the fixed ring 10 and can rotate.
The wind-coal mixing primary regulator 6 is connected with the threaded guide rail 5, and can freely move along the axial direction of the primary wind pipe 2 outside the primary wind pipe 2 along with the rotation of the threaded guide rail 5;
the wind-coal mixing secondary regulator 7 is connected with the threaded guide rail 5, and can freely move along the axial direction of the air pipe outside the secondary air pipe 3 in the rotational flow along with the rotation of the threaded guide rail 5.
The wind-adjusting ring 11 of the wind-coal mixing primary regulator 6 and the wind-coal mixing secondary regulator 7 extend into the precombustor 8 in the running process of the combustion device.
The invention has the beneficial effects that:
the combustion device disclosed by the invention realizes the adjustment of the combustion condition of the pulverized coal by adjusting the mixing time and the mixing position of the pulverized coal and the air flow on the basis of multi-stage air distribution, and realizes the stable and low NOx combustion of the pulverized coal. The device divides the secondary air into the cyclone inner secondary air and the direct-current outer secondary air, and is provided with the tertiary air duct 9 outside the precombustion chamber, so that the air required by pyrolysis, ignition, combustion and burnout of the pulverized coal is divided into four airflows to be mixed with the pulverized coal step by step, the pulverized coal is ensured to be combusted in an anoxic environment, and the generation of NOx is reduced. When the secondary air in the rotational flow flows through the air-coal mixing primary regulator 6 and enters the precombustion chamber 8, under the action of the air regulating ring 11, the air flow entering the precombustion chamber 8 is changed from a horizontal cylinder shape to an outward expansion shape, at the moment, the air-coal mixing primary regulator 6 moves along the direction of the precombustion chamber 8, the mixing of the primary air and the secondary air in the rotational flow is delayed, a mixing delay zone I appears between the primary air and the secondary air in the rotational flow, the coal dust is ensured to have enough time for pyrolysis and gasification in the pyrolysis gasification zone to generate reducing gas, and meanwhile, the uniform mixing of the coal dust and air can be promoted. Similarly, when the direct-current external secondary air enters the precombustion chamber 8, a mixing delay zone II appears between the pulverized coal airflow and the direct-current external secondary air due to the action of the air-coal mixing secondary regulator 7, so that the mixed combustion of the pulverized coal and the rotational-flow internal secondary air is ensured to be under the strong reducing atmosphere, and the generation of NOx is further reduced.
When the primary air is mixed with the secondary air in the rotational flow and the secondary air outside the direct current, the travel of the pulverized coal in the precombustion chamber 8 is far, the pulverized coal is not timely mixed with the secondary air in the rotational flow and the secondary air outside the direct current after pyrolysis gasification is completed, and the ignition and the unstable combustion of the pulverized coal are caused by insufficient oxygen and heat. At the moment, the air-coal mixing primary regulator 6 and the air-coal mixing secondary regulator 7 move towards the air inlet, so that the time for pyrolysis and gasification of pulverized coal and reduction of NOx before mixing primary air with secondary air in a rotational flow and secondary air outside a direct flow is shortened, at the moment, the mixing delay area I and the mixing delay area II are reduced, the mixing position is advanced, and stable ignition of the pulverized coal is ensured. The device realizes the stable and low NOx combustion of the pulverized coal by adjusting the wind-powder mixing in real time.
Meanwhile, the device also has good adaptability to coal types, for easy-to-catch fire coal types such as bituminous coal and the like, the pyrolysis gasification and NOx reduction time of coal dust before primary air is mixed with secondary air in cyclone and secondary air outside direct current are prolonged by adjusting the air-coal mixing primary regulator 6 and the air-coal mixing secondary regulator 7, so that the coal dust is fully pyrolyzed and NOx generation is reduced; for the coal types difficult to catch fire, such as anthracite, the air-coal mixing primary regulator 6 and the air-coal mixing secondary regulator 7 are regulated to enable the pulverized coal to be mixed with the secondary air in the rotational flow and the secondary air outside the direct flow in advance, so that oxygen and enough heat are provided for catching fire of the pulverized coal, and stable combustion of the pulverized coal is ensured.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic cross-sectional view of a wind-coal mixing primary conditioning slider.
In the figure: the central air duct 1, the primary air duct 2, the rotational flow inner secondary air duct 3, the direct current outer secondary air duct 4, the screw guide rail 5, the air-coal mixing primary regulator 6, the air-coal mixing secondary regulator 7, the precombustion chamber 8, the tertiary air duct 9, the fixed ring 10 and the air adjusting ring 11
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the low NOx combustion device with air-coal multistage mixing and real-time adjustment according to the present invention includes a central air duct 1, a primary air duct 2, a cyclone inner secondary air duct 3, a dc outer secondary air duct 4, a screw guide 5, an air-coal primary mixing regulator 6, an air-coal secondary mixing regulator 7, a precombustion chamber 8, and a tertiary air duct 9. When the air flow enters the precombustion chamber 8 through the air-coal mixing primary (secondary) regulator, the air flow direction is changed, the air flow is changed from a horizontal cylinder type to an external expansion type, and the mixing of coal dust and the air flow is delayed.
An air-coal mixing primary regulator 6 is arranged between the primary air duct 2 and the cyclone inner secondary air duct 3 and sleeved on the outer wall surface of the primary air duct 2; an air-coal mixing secondary regulator 7 is arranged between the cyclone inner secondary air pipe 3 and the direct-current outer secondary air pipe 4 and sleeved on the outer wall surface of the cyclone inner secondary air pipe 3. The wind-coal mixed primary (secondary) regulator is of an annular structure and consists of a fixed ring 10 and a wind regulating ring 11, wherein the fixed ring 10 is tightly attached to the outer wall of a primary wind pipe 2 (a cyclone inner secondary wind pipe 3) to play a role in fixing, the fixed ring 10 and the wind regulating ring 11 are integrated, and the wind regulating ring 11 is of a flaring type along the airflow direction and is used for changing the airflow direction. The outer wall surfaces of the primary air duct 2 and the cyclone inner secondary air duct 3 are provided with threaded guide rails 5, and the threaded guide rails 5 are connected with a fixed ring 10 and can rotate, so that the air-coal mixing adjusting slide block can freely move in the axial direction of the air duct.
The device realizes stable and low NOx combustion of the pulverized coal by changing the mixing time and mixing position of the primary air carrying the pulverized coal, the secondary air in the rotational flow and the secondary air outside the direct flow, and meanwhile, the combustion device has stronger adaptability to coal types.
During operation of the combustion device, the wind-coal mixing primary regulator 6 and the wind regulating ring 11 of the wind-coal mixing secondary regulator 7 extend into the precombustor 8.
The primary air carries pulverized coal through an annular channel between the central air pipe 1 and the primary air pipe 2 to enter a pyrolysis gasification zone of the precombustion chamber 8 to generate reducing gas, the secondary air in the rotational flow enters the precombustion chamber 8 through an annular channel between the primary air pipe 2 and the secondary air pipe 3 in the rotational flow, and the secondary air in the rotational flow enters the precombustion chamber 8 to be expanded outwards due to the existence of the primary air-coal mixing regulator 6, so that a mixing delay zone I is formed between the primary air and the secondary air in the rotational flow, the mixing of the primary air and the secondary air in the rotational flow is delayed, and the pyrolysis time of the pulverized coal is prolonged. The secondary air in the rotational flow moves in the precombustion chamber 8 along the axial direction of the air pipe and catches up high-temperature flue gas in the furnace, then the secondary air in the rotational flow is mixed with the primary air to provide oxygen and heat for ignition and combustion of pulverized coal, and meanwhile, the reducing gas generated by pyrolysis and gasification of the pulverized coal can reduce part of NOx generated in the ignition and combustion process into N 2 The NOx concentration is reduced. When primary air and secondary air in the cyclone are mixed still too early, the pyrolysis of the pulverized coal is insufficient, the generated reducing gas is less, only a small amount of NOx is reduced in the combustion process, the generation amount of NOx is large at the moment, the air-coal mixing primary regulator 6 moves along the air flow direction at the moment, the mixing delay area I between the primary air and the secondary air in the cyclone is increased, the mixing of the pulverized coal and the secondary air in the cyclone is delayed, the pyrolysis and gasification are sufficient, and the generation of NOx is further reduced. When the primary air and the secondary air in the rotational flow are mixed too late, the heat required by the pulverized coal in the ignition and combustion stage is needed to be usedAnd the oxygen is insufficient, the combustion stability is reduced, even flameout occurs, at the moment, the air-coal mixing primary regulator 6 moves along the direction of the air flow inlet, the mixing delay area I is reduced, primary air and secondary air in the rotational flow are mixed in advance, and the stable combustion of pulverized coal is ensured.
Because of the existence of the wind-coal mixing secondary regulator 7, the direct-current external secondary wind enters the precombustion chamber 8 to present external expansion, a mixing delay zone II appears between the primary wind and the direct-current external secondary wind, the mixing of the pulverized coal airflow and the direct-current external secondary wind is delayed, at the moment, a part of NOx generated in the pulverized coal combustion process is reduced into N in the NOx reduction zone 2 . When the direct-current external secondary air is mixed with the pulverized coal airflow earlier, the pulverized coal staged combustion effect is poor, the NOx reduction area is smaller, the oxygen content is higher during combustion, and more NOx is generated; when the direct-current external secondary air and the pulverized coal air flow are mixed later, the oxygen content of the pulverized coal is too low in the combustion process, so that the stability of pulverized coal combustion is affected, at the moment, the air-coal mixing secondary regulator 7 is moved towards the direction of the air inlet, the mixing delay zone II is reduced, the pulverized coal air flow and the direct-current external secondary air are mixed in advance, and the stability of pulverized coal combustion is improved.
And then tertiary air is mixed with the pulverized coal airflow at the tail part of the precombustion chamber 8 to provide sufficient oxygen for pulverized coal combustion and ensure the burnout of the pulverized coal.
Claims (4)
1. The adjustable wind-coal progressive mixing combustion device is characterized by comprising a central wind pipe (1), a primary wind pipe (2), a rotational flow inner secondary wind pipe (3) and a direct current outer secondary wind pipe (4) which are sequentially arranged from inside to outside, wherein a precombustion chamber (8) is arranged at the tail part of each wind pipe along the airflow direction, and a tertiary wind pipe (9) is arranged outside the precombustion chamber (8); the cyclone inner secondary air annular airflow channel between the primary air pipe (2) and the cyclone inner secondary air pipe (3) is provided with an air-coal mixing primary regulator (6), the air-coal mixing primary regulator (6) is sleeved outside the primary air pipe (2), the direct current outer secondary air annular airflow channel between the cyclone inner secondary air pipe (3) and the direct current outer secondary air pipe (4) is also provided with an air-coal mixing secondary regulator (7) with the same structure, and the air-coal mixing secondary regulator (7) is sleeved outside the cyclone inner secondary air pipe (3);
the wind-coal mixing primary regulator (6) and the wind-coal mixing secondary regulator (7) have the same structure and comprise a fixed ring (10) and a wind regulating ring (11), the fixed ring (10) of the wind-coal mixing primary regulator (6) is tightly attached to the outer wall of the primary wind pipe (2), the fixed ring (10) of the wind-coal mixing secondary regulator (7) is tightly attached to the outer wall of the cyclone secondary wind pipe (3), and the fixed ring (10) and the wind regulating ring (11) are connected into a whole;
the outer wall surfaces of the primary air pipe (2) and the cyclone inner secondary air pipe (3) are provided with threaded guide rails (5);
the wind-coal mixing primary regulator (6) is connected with the threaded guide rail (5), and can freely move along the axial direction of the air pipe outside the primary air pipe (2) along with the rotation of the threaded guide rail (5), and a mixing delay zone I is formed in the precombustion chamber (8) between primary air and secondary air in the rotational flow;
the wind-coal mixing secondary regulator (7) is connected with the threaded guide rail (5), and can freely move along the axial direction of the air pipe outside the secondary air pipe (3) in the rotational flow along with the rotation of the threaded guide rail (5), and a mixing delay zone II is formed in the precombustion chamber (8) between primary air and direct-current external secondary air;
the real-time on-line adjustment of the mixing time and the space position of the air in the cyclone inner secondary air pipe (3) and the direct-current outer secondary air pipe (4) and the pulverized coal airflow in the primary air pipe (2) along with the coal quality and the combustion condition is realized;
the wind adjusting ring (11) is flared along the airflow direction and is used for changing the airflow direction, and the tail ends of the primary air pipe (2), the cyclone inner secondary air pipe (3) and the direct current outer secondary air pipe (4) are connected with the precombustor in a flush way.
2. An adjustable wind-coal progressive mix combustion apparatus according to claim 1, characterized in that the screw guide (5) is connected to the stationary ring (10) and is rotatable.
3. An adjustable wind-coal progressive mixing combustion device according to claim 1, characterized in that the wind-coal primary mixing regulator (6) and the wind-adjusting ring (11) of the wind-coal secondary mixing regulator (7) extend into the precombustor (8) during operation of the combustion device.
4. An adjustable wind-coal progressive mixing combustion apparatus according to claim 1, wherein the wind-coal mixing primary regulator (6) and the wind-coal mixing secondary regulator (7) are of annular structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010811902.9A CN111947141B (en) | 2020-08-13 | 2020-08-13 | Adjustable wind-coal progressive mixing low NOx combustion device |
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| CN202010811902.9A CN111947141B (en) | 2020-08-13 | 2020-08-13 | Adjustable wind-coal progressive mixing low NOx combustion device |
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| CN111947141A CN111947141A (en) | 2020-11-17 |
| CN111947141B true CN111947141B (en) | 2023-05-30 |
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| CN113007707A (en) * | 2021-03-31 | 2021-06-22 | 中国科学技术大学 | Internal flue gas recirculation low NOx burner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673620A (en) * | 2004-03-24 | 2005-09-28 | 巴布考克日立株式会社 | Burner, fuel combustion method and boiler retrofit method |
| CN101644431A (en) * | 2009-08-31 | 2010-02-10 | 中国计量学院 | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3344694B2 (en) * | 1997-07-24 | 2002-11-11 | 株式会社日立製作所 | Pulverized coal combustion burner |
| CN2387392Y (en) * | 1999-07-21 | 2000-07-12 | 王炜 | Graded burning coal powder burner |
| CN2771656Y (en) * | 2005-02-07 | 2006-04-12 | 煤炭科学研究总院北京煤化工研究分院 | Coal-powder burning apparatus |
| CN101832551A (en) * | 2010-06-18 | 2010-09-15 | 上海交通大学 | Adjustable center weak swirl pulverized coal burner |
| CN106196040A (en) * | 2016-08-29 | 2016-12-07 | 金大地新能源（天津）集团股份有限公司 | Coal burner |
| CN106895408B (en) * | 2017-03-22 | 2023-12-22 | 黄玉河 | Multi-fuel low NO x Burner with a burner body |
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2020
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673620A (en) * | 2004-03-24 | 2005-09-28 | 巴布考克日立株式会社 | Burner, fuel combustion method and boiler retrofit method |
| CN101644431A (en) * | 2009-08-31 | 2010-02-10 | 中国计量学院 | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner |
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