CN2109497U - Double wall mounted jet burner - Google Patents
Double wall mounted jet burner Download PDFInfo
- Publication number
- CN2109497U CN2109497U CN 91224873 CN91224873U CN2109497U CN 2109497 U CN2109497 U CN 2109497U CN 91224873 CN91224873 CN 91224873 CN 91224873 U CN91224873 U CN 91224873U CN 2109497 U CN2109497 U CN 2109497U
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- spout
- burner
- power stream
- jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Abstract
The utility model discloses a burner used for coal power or other fuel, comprising a combustion chamber and flat nozzles. The front wall of the combustion chamber is provided with two flat main jet nozzles and two control jet nozzles. The utility model utilizes two control jets to inject two fuel-bearing main jets to respectively attach to upper and lower walls; a large recirculation zone is formed in the middle part of the double wall mounted jet burner to stabilize flame. Meanwhile, the jets attached to the upper and lower walls have strong purging effect on the walls; the slagging problem generated at the time of coal power burning can be effectively avoided and safety is enhanced; combustion chamber walls can also be effectively cooled; the requirement to the material of the combustion chamber is reduced.
Description
The utility model is a kind of burner that is used for coal dust and other fuel, is specially adapted to the precombustion chamber and the main jet burner of station boiler.
The utility model is the burner that belongs to the precombustion chamber type of restricted clearance burning, is the development on " flame stabilizing method of flat efflux and device thereof " (Chinese patent CN86106725A) basis.The burner of present all kinds of precombustion chamber types all can not fully be avoided the slagging scorification problem when coal dust burning, thereby all is affected to some extent in the application of large-scale coal-fired power station boiler.For example, it is good that the flat jet burner has flame holding, simple in structure, no wear-out part, resistance is little, and power output is bigger, do not need comparatively outstanding advantages such as high-voltage high-speed jet, but, caused the upper wall surface coking problem of flat jet burner owing to when the turnover of reflux airflow changes direction, make pulverized coal particle wherein under effect of inertia, separate and collide with upper wall surface.This is difficult to overcome fully under original pattern.
The purpose of this utility model is to provide a kind of new burner, and it still can keep the outstanding advantage of former flat wall-attached jet burner, can solve the problem of its upper wall surface coking simultaneously again.
Problem at the prior art existence, the utility model adopts and opens two slit shape flat jet spouts at the burner front face, utilization is injected the upper and lower attached wall effect of the air fuel jet of combustion chamber by it, make high temperature combustion zone be stabilized in the middle part, combustion chamber on the one hand, another side has played the effect of wall cleaning.
Fig. 1. be the structure of the present utility model and the operation principle schematic diagram that flows.
Fig. 2. for the utility model P to schematic diagram.
Now in conjunction with Fig. 1,2 pairs of contents of the present utility model are introduced in detail. Burner is the combustion chamber (1) that is made of the rectangle restricted clearance, upper control jet spout (2), and upper power stream spout (3), lower power stream spout (4), lower control jet spout (5) consists of. Control jet Spout (2), (5) and power stream spout (3), (4) are the slit spout of rectangular slot or other shape, their width W ' the be substantially equal to width of combustion chamber (1). The position of control jet spout (2), (5) has formed upper and lower two wall jets in the combustion chamber close to the upper and lower wall of combustion chamber (1). The control jet flow velocity should greatly or equal the power stream flow velocity. Two power stream spouts (3) are about the height b of power stream spout (3), (4) apart from δ between (4)1Or b2。
Flame stabilization principle of the present utility model and preventing, the principle of coking is as follows: by upper, lower two control jet spouts (2), (5) inject the control jet injection of combustion chamber (1) by upper, lower power stream spout (3), (4) inject the upper of combustion chamber (1), lower two strands of power streams that contain combustible, make it be attached to respectively the upper of combustion chamber (1), on the lower wall surface, formed along upper, the zone of lower wall surface forward flow (I), (II), these two drag flow districts (I), (II) is similar to flowing of wall jet, wall there is strong purging effect, can effectively prevent the coking problem on the wall, simultaneously wall there is good cooling effect, make the designs simplification of combustion chamber (1), and its material requirements of adopting is reduced (such as embodiment, be built into refractory brick, greatly saved manufacturing expense). Between two drag flow districts (I), (II), formed a big recirculating zone (III), when after the burner igniting, being in fired state, big recirculating zone (III) will be entrainmented the combustion in downstream or partly fired high-temperature flue gas, making too, the recirculating zone is under the condition of high temperature, by the DIFFUSION IN TURBULENCE effect, the big recirculating zone of high temperature (III) can be heated and lighted the power stream that contains combustible, thereby guarantees the flame stabilization of whole burner.
When adopted be coal dust fuel or other solid, liquid fuel the time, flame stabilization performance of the present utility model is fine.When power stream spout (3); when the jet of pulverized coal particle (or other fuel or drop--as follows) is carried in ejection (4); because the crooked attached wall of power stream; pulverized coal particle is wherein separated from power stream in the jet knee owing to effect of inertia; positive adverse current intersection in the jet knee has formed; following two particle compact districts (IV); particle can directly enter recirculating zone (III) after through compact district (IV); pulverized coal particle in top drag flow district (I) can be owing to the gravity effect enters big recirculating zone (III), also can carry by backflow to enter big recirculating zone (III) and ［ see (V) ］.Have higher coal powder density in the particle compact district (IV), certain oxygen concentration and higher temperature are very favourable for the pyrolysis and the burning of coal particle.Pulverized coal particle directly enters recirculating zone (IV) in a large number, and recirculating zone (III) is under the state that burning is arranged, and more helps keeping the condition of high temperature of himself and lights power stream.Thereby for pulverized coal flame, because particle compact district (IV) and big recirculating zone (III) acting in conjunction have guaranteed the stable of flame.
The utility model provides a kind of burner, and can be used for flame stabilization has the fine coking behavior that prevents simultaneously again.Be specially adapted to the igniting, combustion-supporting and do main burner usefulness of coal-fired power station boiler, can save igniting in a large number and help fuel oil.
An embodiment of the present utility model adopts Fig. 1, structure shown in 2, combustion chamber (1) is a rectangle, power stream spout (3), (4) and control jet spout (2), (5) width all equates with the front face width of combustion chamber (1), power stream spout (3), (4) distance between equals the height of 1 times power stream spout, on, following control jet spout (2), (5) be close to respectively, lower wall surface, air fuel stream in the combustion chamber shunting of (1) input respectively through power stream spray (3), (4) enter combustion chamber (1), because it is last, following control jet spout (2), (5) the distinguished and admirable speed of the secondary of injecting is two times of air fuel stream flow velocity, the long L=1200mm of combustion chamber (1), wide W=500mm, height H=600mm.
Claims (4)
1, a kind of combustion chamber that is made of restricted clearance reaches the burner that has the spout of slit shape air fuel power stream spout and control jet spout at the combustion chamber front face, it is characterized in that having on the front face of combustion chamber (1) two power stream spouts (3), (4) up and down, reach two control jet spouts (2), (5) up and down.
2, burner according to claim 1, it is characterized in that power stream spout (3) up and down, (4) and up and down the width W of control jet spout (2), (5) be substantially equal to the width of combustion chamber (1).
3,, it is characterized in that up and down being about power stream spout height b apart from δ between power stream spout (3), (4) according to claim 1 and 3 described burners
1Or b
2
4, burner according to claim 1 is characterized in that the upper and lower wall of combustion chamber (1) is approached in the position of control jet spout (2), (5) up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91224873 CN2109497U (en) | 1991-09-16 | 1991-09-16 | Double wall mounted jet burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91224873 CN2109497U (en) | 1991-09-16 | 1991-09-16 | Double wall mounted jet burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2109497U true CN2109497U (en) | 1992-07-08 |
Family
ID=4931252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91224873 Granted CN2109497U (en) | 1991-09-16 | 1991-09-16 | Double wall mounted jet burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2109497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765101A (en) * | 2011-09-28 | 2014-04-30 | 中外炉工业株式会社 | Radiant wall burner unit |
| CN110762839A (en) * | 2019-11-28 | 2020-02-07 | 大峘集团有限公司 | Anti-slagging L-shaped pulverized coal direct heating hot blast stove |
-
1991
- 1991-09-16 CN CN 91224873 patent/CN2109497U/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765101A (en) * | 2011-09-28 | 2014-04-30 | 中外炉工业株式会社 | Radiant wall burner unit |
| CN103765101B (en) * | 2011-09-28 | 2016-03-09 | 中外炉工业株式会社 | Radiant wall burner unit |
| CN110762839A (en) * | 2019-11-28 | 2020-02-07 | 大峘集团有限公司 | Anti-slagging L-shaped pulverized coal direct heating hot blast stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |