CN2630654Y - Double-primary-air duct coal-ash master burner - Google Patents
Double-primary-air duct coal-ash master burner Download PDFInfo
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- CN2630654Y CN2630654Y CN 03245338 CN03245338U CN2630654Y CN 2630654 Y CN2630654 Y CN 2630654Y CN 03245338 CN03245338 CN 03245338 CN 03245338 U CN03245338 U CN 03245338U CN 2630654 Y CN2630654 Y CN 2630654Y
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- burner
- channel outlet
- wind channel
- certain distance
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Abstract
The utility model relates to a multiple sudden expansion double primary air channel pulverized coal main burner, which mainly consists of an upper and a lower primary air channel, a waist air channel, a separator, and a reflux space. The export of the upper and lower primary air channel keeps a certain distance with the burner two side walls and upper and lower walls, with multiple sudden expansion formed. The waist air channel with the separator can make secondary air and cold air which are pumped in spread to the whole wall surface of the burner, with adjustable flow. The pulverized coal in the primary air can use normal concentration, and the dense can be separated to realize burn of bias pulverized coal, with nitric oxide emission reduced further.
Description
The utility model relates to a kind of burner, particularly relates to a kind of multi-projecting double-primary-air duct coal dust main burner.Belong to pulverized coal combustion.
Double-primary-air duct coal dust main burner has two wind passages, and designs a backflow space between two passages.This burner coal adaptability is wide, uses different coals and can both reach good steady combustion effect when boiler at low load.But in use find, space, the upper and lower part major part of burner is occupied by a upper and lower wind passage, the backflow high-temperature flue gas can only heat the bottom coal dust of last wind and the top coal dust of wind next time, and be difficult to the be refluxed high-temperature flue gas heating of the two sides of a wind, therefore most of coal dust without heating, catching fire just enters burner hearth, does not play the steady combustion effect that preheating is caught fire in advance.And the primary air jet of broad washes away the water screen tube at burner outlet place easily, influences the safe operation of boiler.
At the problems referred to above, the utility model purpose is a kind of improved burner apparatus of design, can give full play to the steady combustion ability of double-primary-air duct coal dust main burner, guarantees the smooth combustion of various coals under boiler at low load.
The utility model adopts following technical measures: last wind channel outlet 2 dual-sides and burner 1 two side keep certain distance H1, form sudden expansion 4 and sudden expansion 5, last wind channel outlet 2 tops and burner 1 upper wall keep certain distance H2, form sudden expansion 6, sudden expansion 4,5,6 and backflow space 7 form a backflow space that can be communicated with around last wind.Wind channel outlet 3 dual-sides and burner 1 two side keep certain distance H3 next time, form sudden expansion 8 and sudden expansion 9, wind channel outlet 3 bottoms keep certain distance H4 with burner 1 lower wall next time, form sudden expansion 10, sudden expansion 8,9,10 and backflow space 7 form one and can be communicated with around the backflow space of wind next time.High-temperature flue gas enters these two backflow spaces and fully contacts with coal dust, and more coal dust is heated, catches fire in advance, has improved the steady combustion ability of burner.Part is a feeding secondary wind or cold wind and the adjustable rectangle waist of air quantity wind passage 11 between the left and right sides wall of burner 1, two deflector aprons 12 and 15 that are mutually angle α are housed in the passage, following porose 13 are communicated with the backflow space on the passage, can make the secondary wind of feeding or the whole sidewall in the left and right sides that cold wind is diffused into burner 1.
The major advantage of this burner is:
1. it is a kind of general-purpose coal fines combustion device, and it is strong that it surely fires ability, is applicable to various coals, when boiler during in 50%～100% rated load, all can de-oiling surely fire.
2. the strong and weak degree of coal powder ignition point position and burning can regulate and control with waist wind; temperature in the also controlled burner made; promptly feeding air quantity with waist increases, and therefore the temperature in the burner protects whole burner especially to avoid overheated, slagging scorification in its two side by high step-down.
Because a large amount of coal dust by the high-temperature flue gas heating flame of anoxic in the recirculating zone, thereby significantly reduce the NOx growing amount that produces by fuel bound nitrogen, further reduce the NOx discharge capacity.
4. be applicable to the various type of furnaces, various coal mill systems and conventional pulverized-coal concentration or pulverized coal bias combustion.
5. it can be used as the main burner long-time running.
Description of drawings:
Fig. 1 is the structural representation of prior art double-primary-air duct coal dust main burner.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the structural representation of the utility model multi-projecting double-primary-air duct coal dust main burner.
Fig. 4 is the side view of Fig. 3.
Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.The utility model Fig. 3-4 with the something in common of prior art Fig. 1-2 is, the top of burner 1 is last wind channel outlet 2, the bottom is a wind channel outlet 3 next time, last wind channel outlet 2 and next time be backflow space 7 between the wind channel outlet 3, height H 〉=the 250mm in backflow space 7, part is a feeding secondary wind or cold wind and the adjustable rectangle waist of air quantity wind passage 11 between the left and right sides wall of burner 1, bottom along last wind channel outlet 2 is a dividing plate 14 in the inside of burner 1 inwards, the length D of burner 1 is generally 600～1000mm, the length of dividing plate 14 is 0～0.5D, both are in difference: last wind channel outlet 2 dual-sides and burner 1 two side keep certain distance H1, form sudden expansion 4 and sudden expansion 5, H1 〉=60mm, last wind channel outlet 2 tops and burner 1 upper wall keep certain distance H2, form sudden expansion 6, H2 〉=0, wind channel outlet 3 dual-sides and burner 1 two side keep certain distance H3 next time, form sudden expansion 8 and sudden expansion 9, the excursion of H3 is greater than 80mm, wind channel outlet 3 bottoms keep certain distance H4 with burner 1 lower wall next time, form sudden expansion 10, H4 〉=0.Two deflector aprons 12 and 15 that are mutually angle α are housed in the waist wind passage 11, the excursion of angle α is smaller or equal to 90 ° more than or equal to 0 °, following porose 13 are communicated with the backflow space on the passage, can make the secondary wind of feeding or the whole wall that cold wind is diffused into burner 1.
Claims (3)
1. double-primary-air duct coal dust main burner, mainly by last wind channel outlet 2, the wind channel outlet 3 next time, waist wind passage 11, dividing plate 14, backflow space 7 is formed, it is characterized in that: last wind channel outlet 2 dual-sides and burner 1 two side keep certain distance H1, last wind channel outlet 2 tops and burner 1 upper wall keep certain distance H2, wind channel outlet 3 dual-sides and burner 1 two side keep certain distance H3 next time, next time wind channel outlet 3 following and burner 1 lower wall maintenance certain distance H4.
2. coal dust main burner as claimed in claim 1, it is characterized in that: last wind channel outlet 2 dual-sides and burner 1 two side keep certain distance H1, the excursion of H1 is greater than 60mm, last wind channel outlet 2 tops and burner 1 upper wall keep certain distance H2, H2 〉=0, wind channel outlet 3 dual-sides and burner 1 two side keep certain distance H3 next time, the excursion of H3 is greater than 80mm, wind channel outlet 3 bottoms keep certain distance H4, H4 〉=0 with burner 1 lower wall next time.
3. coal dust main burner as claimed in claim 1, it is characterized in that: two deflector aprons 12 and 15 that are mutually angle α are housed in the waist wind passage 11, the excursion of angle α be more than or equal to 0 ° smaller or equal to 90 °, following porose 13 are communicated with the backflow space on the passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03245338 CN2630654Y (en) | 2003-04-18 | 2003-04-18 | Double-primary-air duct coal-ash master burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03245338 CN2630654Y (en) | 2003-04-18 | 2003-04-18 | Double-primary-air duct coal-ash master burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2630654Y true CN2630654Y (en) | 2004-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03245338 Expired - Fee Related CN2630654Y (en) | 2003-04-18 | 2003-04-18 | Double-primary-air duct coal-ash master burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2630654Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620291A (en) * | 2011-01-31 | 2012-08-01 | 中国科学院过程工程研究所 | Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge |
| CN103123110A (en) * | 2011-11-18 | 2013-05-29 | 山西三合盛工业技术有限公司 | Pulverized coal burner for pulverized coal collection and concentration and burning method |
-
2003
- 2003-04-18 CN CN 03245338 patent/CN2630654Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620291A (en) * | 2011-01-31 | 2012-08-01 | 中国科学院过程工程研究所 | Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge |
| CN103123110A (en) * | 2011-11-18 | 2013-05-29 | 山西三合盛工业技术有限公司 | Pulverized coal burner for pulverized coal collection and concentration and burning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |