CN205504974U - Low nitrogen coal burner - Google Patents
Low nitrogen coal burner Download PDFInfo
- Publication number
- CN205504974U CN205504974U CN201620269704.3U CN201620269704U CN205504974U CN 205504974 U CN205504974 U CN 205504974U CN 201620269704 U CN201620269704 U CN 201620269704U CN 205504974 U CN205504974 U CN 205504974U
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- Prior art keywords
- wind
- passage
- powder
- spout
- air channel
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Abstract
The utility model discloses a low nitrogen coal burner. Including the combustor body the inside from interior to exterior of the cavity of combustor body is equipped with ignition fuel channel, ignition fuel wind channel, wind powder passageway and secondary air channel in proper order the exit end of ignition fuel channel is equipped with the burning torch spout, the exit end of a wind powder passageway is equipped with wind powder spout one time, secondary air channel's exit end is equipped with secondary air nozzle, near being equipped with the buggy shower nozzle on the surface of exit end on the wind powder passageway, the outside of buggy shower nozzle is equipped with overgrate air whirl blade, secondary air channel's the outside is equipped with perimeter wind passageway, the exit end of perimeter wind passageway is equipped with annular perimeter wind spout. The utility model discloses in, the spout is difficult for the coking in the stove, greatly reduced the nitrogen oxide who produces during the burning, reduced nitrogen oxide's emission, avoid environmental pollution, this equipment can be in 30% o'clock stable combustion of low -load, life extension.
Description
Technical field
This utility model relates to coal powder burning technology field, particularly relates to a kind of low nitrogen coal burner.
Background technology
China's miniature coal Industrial Boiler, based on grate furnace, pollutes the problems such as high, efficiency is low, automatization level is low.Reveal
Industrial coal powder boiler solve the drawback of above grate furnace, run automatization level high, discharge is reduced.But coal dust is little
There is the underload stability that bigger drawback is exactly burning in type Industrial Boiler, can operate in the relatively underload of 50% and be
The most advanced combustion technology.Meanwhile, without preferable technology in NOx emission so that tail flue gas processes the base of NOx emission
Number is very big, and afterbody processing cost increases.
Utility model content
This utility model provides a kind of low nitrogen coal burner, overcomes existing coal burner under underload environment, burning
Poor stability, nitrogen oxide emission is big, pollutes height, the problems such as service life is short.
The purpose of this utility model is achieved through the following technical solutions:
A kind of low nitrogen coal burner, including burner body, it is characterised in that: described burner body inside cavity by
Interior to being sequentially provided with outward igniter fuel passage, igniter fuel air channel, primary wind and powder passage and secondary air channel, in described igniting combustion
The port of export of material passage is provided with burning torch spout, and the port of export of described primary wind and powder passage is provided with primary wind and powder spout, described secondary
The port of export of wind passage is provided with overfiren air port；Described primary wind and powder passage is provided with coal dust shower nozzle on the outer surface of the port of export,
Described coal dust shower nozzle is arranged between primary wind and powder passage and secondary air channel, and the rear end of described coal dust shower nozzle connects coal dust shower nozzle phase
To position adjusting mechanism, the outside of described coal dust shower nozzle is provided with secondary wind swirl vane, and the rear end of described secondary wind swirl vane is even
Meet secondary wind adjustment of blade angle mechanism；The outside of described secondary air channel is provided with surrounding air passage, going out of described surrounding air passage
Mouth end is provided with annular peripheral wind snout.
The air opening end of described burning torch spout and primary wind and powder spout is towards the precombustion chamber within burner hearth.
The front end of described igniter fuel passage is provided with igniter fuel entrance, and the front end in described igniter fuel air channel is provided with igniter fuel wind
Entrance, the front end of described primary wind and powder passage is provided with primary wind and powder entrance, and the front end of described secondary air channel is provided with secondary wind entrance,
The front end of described surrounding air passage is provided with surrounding air entrance.
Compared with prior art, this utility model at least has the advantage that
By above-mentioned the technical solution of the utility model, this low NO mainly by ignition smooth combustion technology, air distribution hierarchy system,
Precombustion chamber, fluid field in furnace control composition.Ignition, makes precombustion chamber temperature reach 700-1000 degree, then be passed through primary wind and powder and
Secondary wind so that coal dust separates out volatile matter stable burning of catching fire in precombustion chamber, by the steady combustion effect of precombustion chamber so that should
Burner stably can burn when underload 30%.Tertiary air (surrounding air) passes through precombustion chamber circumference, cools precombustion chamber circumference
Material temperature, improves the life-span, has also preheated tertiary air；Tertiary air annular is passed through burner hearth at a high speed so that become a common practice at freeze profile
Bao Fen, and the flow field of inner flue gas of the stove recirculation.In bellows chamber powder makes stove, spout is difficult to coking, and fuel is allocated in combustion air classification into
Act on, and the nitrogen oxides that inner flue gas of the stove recirculation makes combustion process produce is substantially reduced.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of low nitrogen coal burner that this utility model embodiment provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model, the technical scheme in this utility model is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present utility model rather than whole embodiments.Based on this reality
By the embodiment in novel, the every other reality that those of ordinary skill in the art are obtained under not making creative work premise
Execute example, broadly fall into the scope of this utility model protection.
As it is shown in figure 1, the one low nitrogen coal burner proposed for this utility model embodiment, including burner body 1,
The inside cavity of burner body 1 is sequentially provided with igniter fuel passage 2, igniter fuel air channel 3, primary wind and powder passage from the inside to the outside
4 and secondary air channel 5, the port of export at igniter fuel passage 2 is provided with burning torch spout 6, the port of export of primary wind and powder passage 4
Being provided with primary wind and powder spout 7, the port of export of secondary air channel 5 is provided with overfiren air port 8；Near outlet on primary wind and powder passage 4
The outer surface of end is provided with coal dust shower nozzle 9, and coal dust shower nozzle 9 is arranged between primary wind and powder passage 4 and secondary air channel 5, coal
The rear end of powder shower nozzle 9 connects coal dust shower nozzle and is provided with secondary wind swirl vane relative to position adjusting mechanism 10, the outside of coal dust shower nozzle 9
11, the rear end connecting secondary air blade angle adjusting mechanism 12 of secondary wind swirl vane 11；The outside of secondary air channel 5 is provided with
Surrounding air passage 13, the port of export of surrounding air passage 13 is provided with annular peripheral wind snout 14.
Preferably, the air opening end of burning torch spout 6 and primary wind and powder spout 7 is towards the precombustion chamber 15 within burner hearth.
Preferably, the front end of igniter fuel passage 2 is provided with igniter fuel entrance 16, and the front end in igniter fuel air channel 3 is provided with igniting
Fuel air entrance 17, the front end of primary wind and powder passage 4 is provided with primary wind and powder entrance 18, and the front end of secondary air channel 5 is provided with secondary
Wind entrance 19, the front end of surrounding air passage 13 is provided with surrounding air entrance 20.
The function declaration of each structure above-mentioned to the present invention is as follows below in conjunction with the accompanying drawings:
Primary wind and powder entrance 18: the gas-particle two-phase circulation road of certain density, coal dust and First air enter burner through this passage；
Igniter fuel passage 2: this passage provides the fuel of the incendiary source of coal burner, and this passage can be that various combustion gas also may be used
To be fuel oil；
Igniter fuel wind entrance 17: for igniter fuel gas/oil offer combustion air；
Coal dust shower nozzle is relative to position adjusting mechanism 10: regulate primary wind and powder with igniter fuel rifle in the relative position of secondary air channel,
By regulation front and back position, size and the flow velocity of secondary wind can be regulated, and coal dust is ejected in the relative position of precombustion chamber；
Secondary wind adjustment of blade angle mechanism 12: design is fixed on coal dust shower nozzle, by regulating the angle of this blade, then can be real
The regulation of existing secondary wind eddy flow angle.
Secondary wind entrance 19: providing secondary combustion-supporting wind for coal dust firing, this combustion air all allocates the precombustion chamber of burner into；
Surrounding air entrance 20 (tertiary air): provide third level combustion air for coal burner, this combustion air is annular high speed air distribution；
Secondary wind swirl vane 11: be fixed on coal dust primary wind and powder spout, this blade can realize secondary wind by regulation angle and revolve
The regulation of intensity of flow, thus change flame profile；
Primary wind and powder spout 7: this spout is coal dust spout, for the jet of fuel；
Burning torch spout 6: provide igniting for pulverized coal ignition and stablize source, for the independent little burner of igniting, this burner designs
For premixed combustion flame stabilization, rigidity is strong, is difficult to fire extinguishing；
Overfiren air port 8: for secondary wind spout on burner body；
Precombustion chamber 15: by the combustion space of the refractory material casting inside contracted, provide ignition space, this space endogenous fire for coal dust
Flame temperature controls between 700-1000 degree；
Annular peripheral wind snout 14: provide third level air feed for coal dust, and form flue gas in stove in circulation by high-speed jet.
Compared with prior art, this utility model at least has the advantage that
By above-mentioned the technical solution of the utility model, this low NO mainly by ignition smooth combustion technology, air distribution hierarchy system,
Precombustion chamber, fluid field in furnace control composition.Ignition, makes precombustion chamber temperature reach 700-1000 degree, then be passed through primary wind and powder and
Secondary wind so that coal dust separates out volatile matter stable burning of catching fire in precombustion chamber, by the steady combustion effect of precombustion chamber so that should
Burner stably can burn when underload 30%.Tertiary air (surrounding air) passes through precombustion chamber circumference, cools precombustion chamber circumference
Material temperature, improves the life-span, has also preheated tertiary air；Tertiary air annular is passed through burner hearth at a high speed so that become a common practice at freeze profile
Bao Fen, and the flow field of inner flue gas of the stove recirculation.In bellows chamber powder makes stove, spout is difficult to coking, and fuel is allocated in combustion air classification into
Act on, and the nitrogen oxides that inner flue gas of the stove recirculation makes combustion process produce is substantially reduced.
The above, only this utility model preferably detailed description of the invention, but protection domain of the present utility model is not limited to
This, any those familiar with the art in the technical scope that this utility model discloses, the change that can readily occur in or
Replace, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be wanted with right
The protection domain seeking book is as the criterion.
Claims (3)
1. a low nitrogen coal burner, including burner body, it is characterised in that: in the inside cavity of described burner body
It is sequentially provided with igniter fuel passage, igniter fuel air channel, primary wind and powder passage and secondary air channel from the inside to the outside, in described igniting
The port of export of fuel channel is provided with burning torch spout, and the port of export of described primary wind and powder passage is provided with primary wind and powder spout, and described two
The port of export of secondary wind passage is provided with overfiren air port；Described primary wind and powder passage is provided with pulverized coal injection on the outer surface of the port of export
Head, described coal dust shower nozzle is arranged between primary wind and powder passage and secondary air channel, and the rear end of described coal dust shower nozzle connects pulverized coal injection
Head position adjusting mechanism relatively, the outside of described coal dust shower nozzle is provided with secondary wind swirl vane, after described secondary wind swirl vane
End connecting secondary air blade angle adjusting mechanism；The outside of described secondary air channel is provided with surrounding air passage, described surrounding air passage
The port of export be provided with annular peripheral wind snout.
Low nitrogen coal burner the most as claimed in claim 1, it is characterised in that: described burning torch spout and primary wind and powder spout
Air opening end towards the precombustion chamber within burner hearth.
Low nitrogen coal burner the most as claimed in claim 1, it is characterised in that: the front end of described igniter fuel passage is provided with a little
Fire fuel inlet, the front end in described igniter fuel air channel is provided with igniter fuel wind entrance, and the front end of described primary wind and powder passage is provided with
Primary wind and powder entrance, the front end of described secondary air channel is provided with secondary wind entrance, and the front end of described surrounding air passage is provided with surrounding air
Entrance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620269704.3U CN205504974U (en) | 2016-04-01 | 2016-04-01 | Low nitrogen coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620269704.3U CN205504974U (en) | 2016-04-01 | 2016-04-01 | Low nitrogen coal burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205504974U true CN205504974U (en) | 2016-08-24 |
Family
ID=56735078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620269704.3U Expired - Fee Related CN205504974U (en) | 2016-04-01 | 2016-04-01 | Low nitrogen coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205504974U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196044A (en) * | 2016-08-31 | 2016-12-07 | 福建永恒能源管理有限公司 | Low NO is put at a kind of end being applicable to significantly load adjustment |
| CN106765098A (en) * | 2017-02-20 | 2017-05-31 | 烟台龙源电力技术股份有限公司 | Gas burner |
| CN107504488A (en) * | 2017-08-31 | 2017-12-22 | 华电国际电力股份有限公司山东分公司 | Depth peak regulation combines steady burning burner |
| CN108167826A (en) * | 2017-12-29 | 2018-06-15 | 浙江百能科技有限公司 | A kind of turbulent burner for being used for fuel oil or gas steam injection boiler |
| CN108662585A (en) * | 2018-07-06 | 2018-10-16 | 西安交通大学 | A kind of ultralow NO of low-load combustion-stabilizingXCombustion system and its burner |
| CN109373316A (en) * | 2018-09-10 | 2019-02-22 | 常州大学 | A kind of heating natural gas hot water boiler low NO |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
-
2016
- 2016-04-01 CN CN201620269704.3U patent/CN205504974U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196044A (en) * | 2016-08-31 | 2016-12-07 | 福建永恒能源管理有限公司 | Low NO is put at a kind of end being applicable to significantly load adjustment |
| CN106765098A (en) * | 2017-02-20 | 2017-05-31 | 烟台龙源电力技术股份有限公司 | Gas burner |
| CN107504488A (en) * | 2017-08-31 | 2017-12-22 | 华电国际电力股份有限公司山东分公司 | Depth peak regulation combines steady burning burner |
| CN108167826A (en) * | 2017-12-29 | 2018-06-15 | 浙江百能科技有限公司 | A kind of turbulent burner for being used for fuel oil or gas steam injection boiler |
| CN108662585A (en) * | 2018-07-06 | 2018-10-16 | 西安交通大学 | A kind of ultralow NO of low-load combustion-stabilizingXCombustion system and its burner |
| CN108662585B (en) * | 2018-07-06 | 2024-05-28 | 西安交通大学 | Low-load stable-combustion ultralow NOXCombustion system and combustor thereof |
| CN109373316A (en) * | 2018-09-10 | 2019-02-22 | 常州大学 | A kind of heating natural gas hot water boiler low NO |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20180401 |