CN201297645Y - Secondary blasting device of furnace at lower part of industrial boiler - Google Patents
Secondary blasting device of furnace at lower part of industrial boiler Download PDFInfo
- Publication number
- CN201297645Y CN201297645Y CNU2008201650168U CN200820165016U CN201297645Y CN 201297645 Y CN201297645 Y CN 201297645Y CN U2008201650168 U CNU2008201650168 U CN U2008201650168U CN 200820165016 U CN200820165016 U CN 200820165016U CN 201297645 Y CN201297645 Y CN 201297645Y
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- Prior art keywords
- furnace
- lower furnace
- wind
- industrial boiler
- air
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Abstract
A secondary blasting device of a furnace at the lower part of an industrial boiler comprises a lower-part furnace surrounded by a front wall and a rear wall. A burner is arranged on the lower-part furnace; a cool ash bucket is arranged at the bottom of the lower-part furnace; a high-pressure secondary air fan is arranged on the outer side of the lower-part furnace; a bottom air-supporting nozzle and a top air-compressing nozzle are respectively arranged on the lower-part furnace; and the high-pressure secondary air fan is communicated with the bottom air-supporting nozzle and the top air-compressing nozzle through secondary-air air ducts. The secondary blasting device has the advantages that the ash slag at the bottom of the furnace is greatly reduced, the furnace bottom is not easy to coke, and the heat loss caused by the incomplete combustion in the furnace machine is reduced; the combustion of the coal-water slurry is stabler, the ignition thereof is faster, and the burn-out rate is greatly improved; and the generation and the discharge of NOX( Nitrogen Oxide) are reduced by 20 to 30 percent.
Description
(1) technical field
The utility model relates to a kind of Industrial Boiler lower furnace secondary air device, especially water-coal-slurry Industrial Boiler lower furnace secondary air device.
(2) background technology
At present, secondary wind technology has widely in field of boilers and uses, but yet there are no application in the water-coal-slurry Industrial Boiler.Because of the viscosity of coal-water slurry height (＜1200mPa.s), in water-coal-slurry rifle atomization process, have the bulky grain carbon granules to produce, it causes: 1, heat loss due to combustibles in refuse increases; 2, part second-time burning at the bottom of burner hearth makes the coking of burner hearth bottom ash slag.And the burner of water-coal-slurry Industrial Boiler all adopts vortex burner, and it has the wind slurry later stage to mix poor defective, has reduced the burn-off rate of coal slurry.
(3) summary of the invention
In order to overcome the defective that above-mentioned water-coal-slurry Industrial Boiler exists, the utility model provides the clean-burning Industrial Boiler lower furnace of a kind of energy secondary air device.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of Industrial Boiler lower furnace secondary air device, comprise the lower furnace that becomes by front wall, back circummure, described lower furnace is provided with burner, the bottom is provided with furnace hopper, the lower furnace outside is provided with the high-voltage secondary blower fan, be respectively equipped with collet wind nozzle, roof pressure wind nozzle on the described lower furnace, the high-voltage secondary blower fan is communicated with collet wind nozzle, roof pressure wind nozzle by secondary wind airduct respectively.
In the wall displacement design of the corresponding back of lower furnace outlet " bridge of the nose " shape structure is arranged.
Described roof pressure wind arrangement of nozzles blows to front wall at Hou Qiang " bridge of the nose " shape position and near the lower furnace outlet; Collet wind arrangement of nozzles is in the close furnace bottom position of front wall, and wall after blowing to.
Described secondary wind airduct is provided with volume damper.
Be furnished with collet wind nozzle, the roof pressure wind nozzle of high pressure positive blower air feed, the roof pressure wind of generation and collet wind general designation secondary wind, some collet wind nozzles of Bu Zhiing along its length, the 10 ° of angles that make progress are with wind wall backward.Collet wind air quantity accounts for 8%～10% of total blast volume, jet expansion wind speed 30～35m/s.The collet wind action is that the bulky grain carbon granules that unburned is finished is held, avoid it to fall into furnace hopper or furnace bottom, make it reenter the combustion zone burning, reduce heat loss due to combustibles in refuse and the second-time burning at the bottom of burner hearth of part grain carbon granules, make the problem of burner hearth bottom ash slag coking; Arrange some roof pressure wind nozzles along its length, the downward 10 ° of angles of nozzle, with wind to front wall.Collet wind air quantity accounts for total blast volume～10%, jet expansion wind speed～35m/s.The roof pressure wind action is to strengthen the later stage disturbance, remedy the defective of front wall turbulent burner later stage mixing difference, make unburnt carbon granules return the flame combustion district again, also prolonged the time of staying of carbon granules in burner hearth, make burning more complete, guide high-temperature flue gas into front wall simultaneously, help catching fire fast and smooth combustion of water-coal-slurry; Being arranged in of front wall collet wind and burner, back wall roof pressure wind forms the counterclockwise aerodynamic field that circles round greatly in the burner hearth, strengthened ablaze stability, not only improve the burn-off rate of coal slurry and furnace flame degree of filling but also realized the segmentation air feed, also reduced the flame zone temperature simultaneously, reduce the generation of heating power nitrogen, reach NO
XGeneration and discharging.
The beneficial effects of the utility model mainly show: 1, burner hearth furnace bottom lime-ash significantly reduces, and furnace bottom is difficult for coking, and the heat loss due to combustibles in refuse of boiler reduces; 2, water-coal-slurry, catch fire quicker, burn-off rate more stable in the stove internal combustion is greatly improved; 3, NO
XGeneration and discharging reduce by 20～30%.
(4) description of drawings
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is that the B of Fig. 1 is to view.
(5) specific embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to accompanying drawing 1-3, a kind of Industrial Boiler lower furnace secondary air device, comprise the lower furnace 2 that surrounds by front wall 4, back wall 5, described lower furnace is provided with burner 1, the bottom is provided with furnace hopper 3, the lower furnace outside is provided with high-voltage secondary blower fan 3, is respectively equipped with collet wind nozzle 6, roof pressure wind nozzle 7 on the described lower furnace, and the high-voltage secondary blower fan is communicated with collet wind nozzle, roof pressure wind nozzle by secondary wind airduct 10 respectively.In the wall displacement design of the corresponding back of lower furnace outlet " bridge of the nose " shape structure 8 is arranged.Described roof pressure wind arrangement of nozzles blows to front wall at Hou Qiang " bridge of the nose " shape position and near the lower furnace outlet; Collet wind arrangement of nozzles is in the close furnace bottom position of front wall, and wall after blowing to.Described secondary wind airduct is provided with volume damper 11.
Claims (4)
1, a kind of Industrial Boiler lower furnace secondary air device, comprise the lower furnace that becomes by front wall, back circummure, described lower furnace is provided with burner, the bottom is provided with furnace hopper, it is characterized in that: the lower furnace outside is provided with the high-voltage secondary blower fan, be respectively equipped with collet wind nozzle, roof pressure wind nozzle on the described lower furnace, the high-voltage secondary blower fan is communicated with collet wind nozzle, roof pressure wind nozzle by secondary wind airduct respectively.
2, Industrial Boiler lower furnace secondary air device as claimed in claim 1 is characterized in that: in the wall displacement design of the corresponding back of lower furnace outlet " bridge of the nose " shape structure is arranged.
3, Industrial Boiler lower furnace secondary air device as claimed in claim 2 is characterized in that: described roof pressure wind arrangement of nozzles blows to front wall at Hou Qiang " bridge of the nose " shape position and near the lower furnace outlet; Collet wind arrangement of nozzles is in the close furnace bottom position of front wall, and wall after blowing to.
4, Industrial Boiler lower furnace secondary air device as claimed in claim 3, it is characterized in that: described secondary wind airduct is provided with volume damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201650168U CN201297645Y (en) | 2008-09-24 | 2008-09-24 | Secondary blasting device of furnace at lower part of industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201650168U CN201297645Y (en) | 2008-09-24 | 2008-09-24 | Secondary blasting device of furnace at lower part of industrial boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201297645Y true CN201297645Y (en) | 2009-08-26 |
Family
ID=41043627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201650168U Expired - Fee Related CN201297645Y (en) | 2008-09-24 | 2008-09-24 | Secondary blasting device of furnace at lower part of industrial boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201297645Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699166B (en) * | 2009-11-16 | 2011-03-23 | 上海交通大学 | Bottom air spout set of tangentially-fired coal-burning boiler |
| CN102620309A (en) * | 2012-04-10 | 2012-08-01 | 无锡华光锅炉股份有限公司 | Bottom air distribution structure of boiler |
-
2008
- 2008-09-24 CN CNU2008201650168U patent/CN201297645Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699166B (en) * | 2009-11-16 | 2011-03-23 | 上海交通大学 | Bottom air spout set of tangentially-fired coal-burning boiler |
| CN102620309A (en) * | 2012-04-10 | 2012-08-01 | 无锡华光锅炉股份有限公司 | Bottom air distribution structure of boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20130924 |