CN210485721U - Gas low-nitrogen burner for boiler - Google Patents
Gas low-nitrogen burner for boiler Download PDFInfo
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- CN210485721U CN210485721U CN201920976252.6U CN201920976252U CN210485721U CN 210485721 U CN210485721 U CN 210485721U CN 201920976252 U CN201920976252 U CN 201920976252U CN 210485721 U CN210485721 U CN 210485721U
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Abstract
The utility model discloses a gas low-nitrogen burner for a boiler, which comprises a gas channel and a combustion-supporting air channel, wherein the gas channel is divided into a central gas channel (1) and an outer layer gas channel (2), and all gas is supplied through a gas collecting ring (3); the combustion-supporting air channel is divided into a central primary air channel (6) and a secondary air channel (8) at the outer side, and all combustion-supporting air is supplied through an air channel inlet (4). This patent simple structure, its unique design can effectively reduce local high temperature in combustor export and whole combustion temperature to realize extremelyLow nitrogen oxide emission, and meets 30mg/Nm3And no carbon monoxide is produced.
Description
Technical Field
The utility model relates to a low nitrogen burner of gas for boiler.
Background
Nitrogen oxides are an important pollution source of the atmospheric environmentCausing acid rain, photochemical smog and haze, and causing serious harm to the ecological environment and the health of human beings. With the increasing concern on environmental problems, the emission limit of the nation on boiler atmospheric pollutants is becoming stricter, and DB11/139-2015 emission Standard of boiler atmospheric pollutants in Beijing City requires that the nitrogen oxide emission of a newly-built gas boiler is reduced to 30mg/m after 4 months and 1 days in 20173The DB31/387 of Shanghai city 2018 emission Standard of atmospheric pollutants for boilers stipulates that the emission of nitrogen oxides of newly-built boilers is 50mg/m3The standard limit of (2).
In order to reduce the investment cost and equipment operation and maintenance cost of denitration after boiler combustion and analyze the production mechanism of nitrogen oxide, the requirement of emission reduction in the combustion stage of the boiler can be met through excellent structural design, and the aim of low NOx emission is fulfilled on the basis of ensuring high combustion efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel efficient gas low-nitrogen burner, the gas of the burner is divided into two stages, the central gas 1 is positioned in a central primary air channel 6, the end part of a gas nozzle is a wedge-shaped inclined plane, the spray holes are axially and uniformly arranged, and the axis is vertical to the inclined plane; the outer gas 2 is uniformly arranged in the secondary air channel 8 of the burner in the circumferential direction. The inlet of the central primary air channel is provided with a pull rod 7 for adjusting the air inlet amount, and the outlet is provided with a swirl vane 10; the secondary air is fed from a perforated plate 11 arranged in the combustor and is fed into the hearth through secondary air holes 9 which are uniformly distributed in the circumferential direction, the air guns on the outer side correspond to the secondary air holes one by one, and each air gun is arranged in the center of the corresponding secondary air hole. The utility model discloses make gas and air flash mixed, the homogeneous combustion can effectively reduce local high temperature and whole combustion temperature, has low nitrogen oxide emission performance.
The utility model provides a novel efficient gas low-nitrogen burner, the gas of the burner is divided into two stages, the central gas 1 is positioned in a central primary air channel 6, the end part of a gas nozzle is a wedge-shaped inclined plane, the spray holes are axially and uniformly arranged, and the axis is vertical to the inclined plane; the injection angle of the central gas can be well and uniformly mixed with the central rotational flow primary air arranged outside, the central stable flame of the burner is ensured, andthe size of the air quantity can be adjusted through the primary air inlet pull rod 7, and the air distribution and the structure of flame can be adjusted. The gas 2 on the outer side is uniformly arranged in the secondary air channel 8 in the circumferential direction and is positioned at the center corresponding to the secondary air hole, and the matching uniformity of the secondary air and the gas of the combustor is ensured through the design of the porous plate 11 and the secondary air hole 9. And a negative pressure area for dividing small flames is formed around each single secondary air hole, so that surrounding smoke is effectively sucked, and a smoke internal circulation structure is formed. This patent simple structure, its unique design can effectively reduce local high temperature in combustor export and whole combustion temperature to realize very low nitrogen oxide and discharge, satisfy 30mg Nm3And no carbon monoxide is produced.
Drawings
FIG. 1 is a schematic structural diagram of a boiler gas low-nitrogen burner in a front view;
fig. 2 is a right side view of fig. 1.
Description of the reference numerals
The gas-liquid separator comprises a central gas channel 1, an outer layer gas channel 2, a gas collecting ring 3, an air channel inlet 4, a central primary air channel 6, a primary air inlet pull rod 7, a secondary air channel 8, a secondary air hole 9, swirl vanes 10 and a porous plate 11.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the detailed description, but the present invention is not limited to the following examples.
The utility model provides a novel efficient gas low-nitrogen burner, the gas of the burner is divided into two stages, the central gas 1 is positioned in a central primary air channel 6, the end part of a gas nozzle is a wedge-shaped inclined plane, the spray holes are axially and uniformly arranged, and the axis is vertical to the inclined plane; the injection angle of the central gas can be well and uniformly mixed with the central rotational flow primary air arranged on the outer side, the continuous and stable flame at the center of the burner is ensured, the air quantity can be adjusted through the primary air inlet pull rod 7, and the air distribution and the structure of the flame are adjusted. The gas 2 outside is evenly arranged in the overgrate air channel 8 in the circumference to be located the center in each overgrate air hole, through the design of perforated plate 11 and overgrate air hole 9, guaranteed the matching homogeneity of combustor overgrate air and gas. And a stable and uniform temperature field is formed at the outlet of the whole combustor, so that the aims of rapid mixing and uniform combustion are fulfilled, the local high temperature and the overall combustion temperature are effectively reduced, and the low nitrogen oxide emission performance of the combustor is met.
Claims (5)
1. Low NOx burner of gas for boiler, including gas channel and combustion-supporting wind passageway, its characterized in that: the gas channel is divided into a central gas channel (1) and an outer layer gas channel (2), and all gas is supplied through a gas collecting ring (3); the combustion-supporting air channel is divided into a central primary air channel (6) and a secondary air channel (8) at the outer side, and all combustion-supporting air is supplied through an air channel inlet (4).
2. The gas low-nitrogen burner for a boiler according to claim 1, characterized in that: the outlet of the central gas channel is a wedge-shaped end, the gas holes are uniformly arranged in the circumferential direction perpendicular to the wedge-shaped inclined plane, and the central gas accounts for 10-20% of the total gas quantity.
3. The gas low-nitrogen burner for a boiler according to claim 1, characterized in that: the central primary air channel (6) is provided with a swirl vane (10) at the central gas outlet end; an inlet adjusting baffle (7) is arranged at the inlet end of the central primary air channel.
4. The gas low-nitrogen burner for a boiler according to claim 1, characterized in that: the secondary air on the outer side enters the furnace through a porous plate (11) arranged in the combustor and enters the furnace through secondary air holes uniformly distributed on a nozzle of the combustor, and the number of the air holes is 6-10 and is consistent with that of the outer side gas guns.
5. The gas-fired low-nitrogen burner for a boiler according to claim 1 or 4, characterized in that: the outer layer gas accounts for 80-90% of the total gas quantity, the number of the gas guns is 6-10, the outer layer gas channels (2) are uniformly arranged in the secondary air channel (8) in the circumferential direction, and the nozzles of the gas guns are arranged in the centers of the corresponding secondary air holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920976252.6U CN210485721U (en) | 2019-06-24 | 2019-06-24 | Gas low-nitrogen burner for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920976252.6U CN210485721U (en) | 2019-06-24 | 2019-06-24 | Gas low-nitrogen burner for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210485721U true CN210485721U (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920976252.6U Active CN210485721U (en) | 2019-06-24 | 2019-06-24 | Gas low-nitrogen burner for boiler |
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| CN (1) | CN210485721U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173690A (en) * | 2019-06-24 | 2019-08-27 | 上海锅炉厂有限公司 | A kind of boiler combustion gas low NO |
| CN111810951A (en) * | 2020-07-17 | 2020-10-23 | 北京泷涛环境科技有限公司 | Environment-friendly combustor with ultralow nitrogen oxide emission |
-
2019
- 2019-06-24 CN CN201920976252.6U patent/CN210485721U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173690A (en) * | 2019-06-24 | 2019-08-27 | 上海锅炉厂有限公司 | A kind of boiler combustion gas low NO |
| CN111810951A (en) * | 2020-07-17 | 2020-10-23 | 北京泷涛环境科技有限公司 | Environment-friendly combustor with ultralow nitrogen oxide emission |
| CN111810951B (en) * | 2020-07-17 | 2022-06-28 | 北京泷涛环境科技有限公司 | Environment-friendly combustor with ultralow nitrogen oxide emission |
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