CN201348244Y - Fixed pulverized coal nozzle of central air multi-channel lignite burner - Google Patents
Fixed pulverized coal nozzle of central air multi-channel lignite burner Download PDFInfo
- Publication number
- CN201348244Y CN201348244Y CNU2008202117185U CN200820211718U CN201348244Y CN 201348244 Y CN201348244 Y CN 201348244Y CN U2008202117185 U CNU2008202117185 U CN U2008202117185U CN 200820211718 U CN200820211718 U CN 200820211718U CN 201348244 Y CN201348244 Y CN 201348244Y
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- China
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- coal
- pulverized coal
- coal nozzle
- wind
- sandwich
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Abstract
The utility model provides a fixed pulverized coal nozzle of a central air multi-channel lignite burner, which is composed of two portions, wherein one portion includes a pulverized coal nozzle body provided with central air and the other portion includes a pulverized coal nozzle made by heat resisting cast steel. Two central air passages are installed in the pulverized coal nozzle body, a portion of secondary air from a baffle plate flows into the center air passages while the other portion is circumferential air of a primary air spout, and corrugated blunt bodies are arranged at central air outlet ends. The fixed pulverized coal nozzle can reflux a large quantity of high-temperature smoke, increases ignition capacity of pulverized coal and effectively reduces generation of NOx during early ignition of the pulverized coal.
Description
(1) technical field
The utility model relates to the boiler using brown coal technical field, is specifically related to a kind of multichannel brown coal burner.
(2) background technology
In large-scale boiler using brown coal design, the design of burner is a more complicated, should consider the smooth combustion of catching fire of coal dust, consider the coking property of coal dust again, particularly the NOx discharging is difficult to control, and a little less than the jet rigidity of a wind, boiler is in actual motion, burner hearth is unclean, often occurs serious coking phenomenon in the stove.Its major defect has:
1, brown coal burner design more complicated, Consideration is more, and structure and parameter are chosen bad, are easy to cause boiler coke, have a strong impact on the safe operation of boiler, and can influence the smooth combustion of coal dust.
2, owing to the burning feature of brown coal, air distribution requires accurately should not adopt air stage feeding, discharges so be difficult to control NOx.
(3) summary of the invention
The backflow high-temperature flue gas that provides a kind of energy a large amount of is provided the purpose of this utility model, improve the ability of catching fire of coal dust, and can effectively reduce the coal dust initial stage fixed coal nozzle of sandwich wind multichannel brown coal burner that NOx generates that catches fire.
The purpose of this utility model is achieved in that fixed coal nozzle is made of two parts, a part is the coal nozzle body that sandwich wind is installed, another part is the coal dust spout of being made by heat resisting cast steel, two sandwich wind passages of installing in the coal nozzle body, secondary wind part from baffle plate is divided in the sandwich wind passage, another part is the surrounding air of a wind snout, is provided with the ripple bluff body at the sandwich wind port of export.
The utility model also has some technical characterictics like this:
1, described fixed coal nozzle connects the combustion chamber by pulverized coal channel, and the circular end of coal nozzle body links to each other with the elbow of pulverized coal channel, and a square end welds with the coal dust spout.
The utility model is based on the characteristics of above brown coal burning, mainly be smooth combustion and reduction NOx discharging for coal dust, and can effectively control coking in the stove, guarantee the safe operation of boiler, be characterized in: two sandwich wind passages of installing in the coal nozzle body, secondary wind part from baffle plate is divided in the sandwich wind passage, and another part is the surrounding air of a wind snout.Sandwich wind not only can protect burner nozzle not by scaling loss; can provide suitable secondary combustion air and the jet rigidity that improves a wind for coal dust timely simultaneously; also designed the ripple bluff body at the sandwich wind port of export in addition; high-temperature flue gas preferably can reflux; improve the ability of catching fire of coal dust, effectively reduced the catch fire generation of NOx of coal dust initial stage.
The utility model burner has obtained practical application at Yi Min second phase 600MW boiler using brown coal, has reached good result by actual motion, and the application of sandwich wind multichannel brown coal burner has mainly reached following purpose:
1: because the design of the sandwich wind port of export has the ripple bluff body, the high-temperature flue gas that can reflux preferably so in actual motion, improved the ability of catching fire of coal dust, makes the combustion stability of coal dust good.
2: sandwich wind multichannel brown coal burner has been realized bias combustion, has controlled the generation of NOx effectively.
3: sandwich wind provides needed oxygen amount of coal dust initial stage in time, when coal dust can in time be caught fire, has also improved the jet rigidity of a wind, prevented the spout coking, boiler is in actual motion, and burner hearth is cleaner, does not occur serious coking phenomenon in the stove.
(4) description of drawings
Fig. 1 is a structure principle chart of the present utility model.
(5) specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described:
In conjunction with Fig. 1, the fixed coal nozzle of present embodiment mainly is made of two parts, and one is the coal nozzle body 1 that sandwich wind is installed, and another is the coal dust spout of being made by heat resisting cast steel 2, and both form fixed coal nozzle jointly.Two sandwich wind passages 3 of installing in the coal nozzle body, secondary wind part from baffle plate is divided in the sandwich wind passage, another part is the surrounding air of a wind snout, be provided with ripple bluff body 4 at the sandwich wind port of export, 1 one-tenth circumference of coal nozzle body transition shape, a circular end links to each other with the elbow of pulverized coal channel, and a square end is with 2 welding of coal dust spout.One time the wind breeze airflow enters coal nozzle body 1 by pulverized coal channel, divides three strands of air-flows to spray into combustion chamber through sandwich wind coal dust, and two-layer sandwich wind has improved the primary air jet rigidity on the one hand, and the oxygen amount that the coal dust initial stage catches fire required is provided on the other hand.The ripple bluff body of the sandwich wind port of export, backflow high-temperature flue gas that can be a large amount of improves the ability of catching fire of coal dust, and can effectively reduce the catch fire generation of NOx of coal dust initial stage.
Claims (2)
1, the fixed coal nozzle of a kind of sandwich wind multichannel brown coal burner, it is characterized in that fixed coal nozzle is made of two parts, a part is the coal nozzle body that sandwich wind is installed, another part is the coal dust spout of being made by heat resisting cast steel, two sandwich wind passages of installing in the coal nozzle body, secondary wind part from baffle plate is divided in the sandwich wind passage, and another part is the surrounding air of a wind snout, is provided with the ripple bluff body at the sandwich wind port of export.
2, the fixed coal nozzle of sandwich wind multichannel brown coal burner according to claim 1, it is characterized in that described fixed coal nozzle connects the combustion chamber by pulverized coal channel, the circular end of coal nozzle body links to each other with the elbow of pulverized coal channel, and a square end welds with the coal dust spout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202117185U CN201348244Y (en) | 2008-12-17 | 2008-12-17 | Fixed pulverized coal nozzle of central air multi-channel lignite burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202117185U CN201348244Y (en) | 2008-12-17 | 2008-12-17 | Fixed pulverized coal nozzle of central air multi-channel lignite burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201348244Y true CN201348244Y (en) | 2009-11-18 |
Family
ID=41367711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202117185U Expired - Fee Related CN201348244Y (en) | 2008-12-17 | 2008-12-17 | Fixed pulverized coal nozzle of central air multi-channel lignite burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201348244Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705820A (en) * | 2012-06-29 | 2012-10-03 | 山东电力集团公司电力科学研究院 | Intelligent adaptive multi-coal type direct current pulverized coal combustion device |
| CN103148505A (en) * | 2013-03-07 | 2013-06-12 | 上海锅炉厂有限公司 | Multi-coal-type low-nitrogen pulverized-coal combustion method with gap air |
| CN104406164A (en) * | 2014-11-28 | 2015-03-11 | 哈尔滨锅炉厂有限责任公司 | Pulverized lignite homogeneous phase combustor and combustion method |
-
2008
- 2008-12-17 CN CNU2008202117185U patent/CN201348244Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705820A (en) * | 2012-06-29 | 2012-10-03 | 山东电力集团公司电力科学研究院 | Intelligent adaptive multi-coal type direct current pulverized coal combustion device |
| CN102705820B (en) * | 2012-06-29 | 2014-06-18 | 山东电力集团公司电力科学研究院 | Intelligent adaptive multi-coal type direct current pulverized coal combustion device |
| CN103148505A (en) * | 2013-03-07 | 2013-06-12 | 上海锅炉厂有限公司 | Multi-coal-type low-nitrogen pulverized-coal combustion method with gap air |
| CN103148505B (en) * | 2013-03-07 | 2015-04-08 | 上海锅炉厂有限公司 | Multi-coal-type low-nitrogen pulverized-coal combustion method with gap air |
| CN104406164A (en) * | 2014-11-28 | 2015-03-11 | 哈尔滨锅炉厂有限责任公司 | Pulverized lignite homogeneous phase combustor and combustion method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20171217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |