CN201246737Y - Anthracite duff combustion device of power station boiler - Google Patents
Anthracite duff combustion device of power station boiler Download PDFInfo
- Publication number
- CN201246737Y CN201246737Y CNU2008200512368U CN200820051236U CN201246737Y CN 201246737 Y CN201246737 Y CN 201246737Y CN U2008200512368 U CNU2008200512368 U CN U2008200512368U CN 200820051236 U CN200820051236 U CN 200820051236U CN 201246737 Y CN201246737 Y CN 201246737Y
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- firing tube
- anthracite powder
- cyclone firing
- boiler
- combustion
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Abstract
The utility model relates to a power station boiler anthracite powder combustion device, comprising a boiler hearth (1), wherein the back part of the boiler hearth (1) is mounted with a cyclone combustion barrel (2) above which a spray gun is arranged for high-speed rotating and spraying anthracite powder into the combustion chamber of the cyclone combustion barrel (2), the top of the cyclone combustion barrel (2) is provided with a first tangent air supply outlet for supplying air for the combustion of the anthracite powder, the wall of the combustion chamber of the cyclone combustion barrel (2) is provided with a second tangent air supply outlet (5) for feeding air for the complete combustion of ignited anthracite powder. The utility model combines cyclone burner and direct-flow burner, to obtain the advantages of cyclone burner and direct-flow burner, thereby confirming fast ignition and complete combustion of anthracite powder, to improve the efficiency of the boiler. The power station boiler anthracite powder combustion device has the advantages of reasonable design, simple structure, simple use, the ability for directly and completely burning anthracite powder, and significant social and economic benefits.
Description
Technical field:
The utility model is a kind of station boiler anthracite powder combustion plant, belongs to the innovative technology of station boiler anthracite powder combustion plant.
Background technology:
Along with rising steadily of fuel price, burned coal price is also in rapid rising, high-quality bituminous coal particularly, and price is high especially as to go against accepted conventions.Simultaneously, the environmental protection dynamics of government is also continuing to increase, and is more and more urgent to the requirement that the burning smoke coal utility boiler is transformed.Anchracite duff has the advantage that sulfur content is low, volatile matter is low, calorific value is high, pollutant discharge amount is few.Can be widely used in station boiler.But the shortcoming that anchracite duff exists is that volatile matter is low, and extremely difficulty is caught fire, difficult after-flame, existing plain cylindrical furnace adopts the single flow coal burner mostly, and its characteristic is as follows: 1. do not rotate, the jet extended corner is little, the ability of entrainmenting is little, and the flammability of single burner is poor, and the burner hearth degree of filling is poor; 2. the jet decay is slow, far firing range, and the later stage mixes, and helps the coal dust after-flame; 3. adopt four jiaos of layouts, when cooperatively interacting, light mutually, catch fire, mix strong; Because DC burner outlet recirculating zone is very little, ignition condition is very poor, and the anthracite of burning low volatile is very difficult.Though can mix a part of anthracite of burning after adopting the bluff body combustion technology, think to be fuel or extremely difficult fully with the anthracite.If will thoroughly change the burning anthracite, must improve the fire behaviour of burner.The technology of improving the anthracite ignition characteristic has a lot, and using the most successful is to adopt the swirl flow combustion technology.
Adopt the vortex burner of swirl flow combustion technology to form, the rotational flow generator (abbreviation cyclone) of various types is housed in the burner by circular spout.When breeze airflow or hot-air pass through cyclone, rotate, after spout penetrates, promptly form rotating jet.Utilize rotating jet, can be formed with and be beneficial to the high temperature gases recirculating district that catches fire, and air-flow is mixed strongly.
Be formed centrally the recirculating zone after penetrating spout in air-flow, this recirculating zone is interior recirculating zone.The high-temperature flue gas that entrainment in the stove interior recirculating zone heats breeze airflow, and with regard to initial burning, flame is outwards propagated from the inward flange of interior recirculating zone after breeze airflow has had certain heat and reached ignition temperature.Meanwhile, also form the recirculating zone in the periphery of swirling eddy, this recirculating zone is in the exteenal reflux district.Also entrainment high-temperature flue gas and add hot-air and breeze airflow in the exteenal reflux district.Because secondary wind also forms swirling eddy, the mixing ratio of secondary wind and a wind is stronger, and combustion process is carried out continuously, and constantly development is until after-flame.Compare with direct jet, swirling eddy has proal axial velocity simultaneously and along the tangential velocity of circular motion, this just makes air-flow on flow direction, strengthen with tangential disturbance ability vertically, thereby the air-flow rate of decay is than very fast, and range is short.In swirl flame, entrainment high-temperature flue gas at the flame root, form recirculating zone on a large scale, this flame can entrainment flame self burning liberated heat, has the extremely strong self-stabilization ability of catching fire, and because of capacity of returns is big, is fit to very much the anthracite of the difficult combustion of burning.
Though the flammability of turbulent burner is fabulous, can satisfy the anthracitic requirement of catching fire fully.But its air-flow rate of decay is than very fast, and range is short, and the later stage mixes bad, causes boiler efficiency to reduce.
The utility model content:
The purpose of this utility model is to consider the problems referred to above and provides a kind of and guarantee that not only anchracite duff can catch fire fast, and guarantees the fully station boiler anthracite powder combustion plant of after-flame of anchracite duff.The utility model combines turbulent burner and DC burner, can make the direct after-flame of anchracite duff, can effectively improve boiler efficiency.
The technical solution of the utility model is: station boiler anthracite powder combustion plant of the present utility model includes boiler furnace, wherein the rear portion of boiler furnace is equipped with the cyclone firing tube, the top of cyclone firing tube is provided with anchracite duff is rotated spray gun in the combustion chamber that sprays into the cyclone firing tube at a high speed, and the top of cyclone firing tube is provided with the once tangential air outlet of sending into anchracite duff burning required air.
The furnace wall, combustion chamber of above-mentioned cyclone firing tube is provided with the tangential air outlet of secondary of sending into the required air of guaranteeing fully to burn after anchracite duff catches fire.
Tangential air outlet of above-mentioned secondary and once tangential air outlet be not on same horizontal plane.
Above-mentioned cyclone firing tube is cylindric cyclone firing tube.
The bottom of above-mentioned cyclone firing tube is provided with the grey slag bucket of accepting the liquid lime-ash of discharging anchracite duff burning back.
Above-mentioned cyclone firing tube adopts water-cooling pattern.The ratio that meets of above-mentioned cyclone firing tube and DC burner is 70%:30%.
The utility model is owing to adopt turbulent burner and DC burner structure combining, so combine the advantage of turbulent burner and DC burner, guarantee that not only anchracite duff can catch fire fast, and guarantee fully after-flame of anchracite duff, thereby can effectively improve boiler efficiency.The utility model is reasonable in design, and is simple in structure, easy to use, is a kind of station boiler anthracite powder combustion plant that can make the direct after-flame of anchracite duff, and its social benefit and economic benefit are all more remarkable.
Description of drawings:
Fig. 1 is the structural representation of the utility model station boiler anthracite powder combustion plant.
The specific embodiment:
Embodiment:
The structural representation of the utility model station boiler anthracite powder combustion plant as shown in Figure 1, include boiler furnace 1, wherein the rear portion of boiler furnace 1 is equipped with cyclone firing tube 2, the top of cyclone firing tube 2 is provided with anchracite duff is rotated spray gun 3 in the combustion chamber that sprays into cyclone firing tube 2 at a high speed, and the top of cyclone firing tube 2 is provided with the once tangential air outlet 4 of sending into anchracite duff burning required air.
For the anchracite duff after further guaranteeing to catch fire can fully burn, the furnace wall, combustion chamber of above-mentioned cyclone firing tube 2 is provided with the tangential air outlet 5 of secondary of sending into the required air of guaranteeing fully to burn after anchracite duff catches fire.Tangential air outlet 5 of above-mentioned secondary and once tangential air outlet 4 be not on same horizontal plane.
In the present embodiment, above-mentioned cyclone firing tube 2 is cylindric cyclone firing tube.
In addition, the bottom of above-mentioned cyclone firing tube 2 is provided with the grey slag bucket 6 of accepting the liquid lime-ash of discharging anchracite duff burning back.
Above-mentioned cyclone firing tube 2 adopts water-cooling pattern.Above-mentioned cyclone firing tube 2 is 70%:30% with the ratio that meets of DC burner.
The utility model in the course of the work, anchracite duff by spray gun 3 at a high speed rotation spray into the combustion chamber of cyclone firing tube 2, the combustion space of combustion chamber be the fireball that rotates at a high speed, burning velocity is tens times of plain cylindrical furnace.The burning anchracite duff needed air that burns, be divided into the tangential wind of several parts, promptly once tangential wind and the tangential wind of secondary etc., once tangential wind tangentially enters the combustion chamber of cyclone firing tube 2 from the set once tangential air outlet 4 in top at the cyclone firing tube 2 of a distance, spray gun 3 downstream, do rotation at a high speed from the once tangential wind that tangential air outlet 4 once enters, the air-flow of rotation entrainments the high-temperature flue gas in the combustion chamber of cyclone firing tube 2 front end of the combustion chamber of cyclone firing tube 2 at a high speed, the chamber front end that has guaranteed cyclone firing tube 2 can be kept sufficiently high temperature, make anchracite duff be able to Fast Heating, the stable ignition burning; Fully burn the tangential air outlet 5 of secondary that needed another part air (being the tangential wind of secondary etc.) is provided with by cyclone firing tube 2 furnace walls of anchracite duff after catching fire is sent into the combustion chamber of cyclone firing tube 2, the air-flow of rotation makes strong vorticla motion and the complicated axial flow of formation in cyclone firing tube 2 combustion chambers at a high speed, combustion process is more red-hot, the high-temperature flue gas that the anchracite duff burning produces enters the further afterburnt of burning chamber, enter boiler furnace 1, anchracite duff time of staying in the combustion chamber of cyclone firing tube 2 and boiler furnace 1 reached more than 10 seconds, and the burnout rate of guaranteeing anchracite duff is more than 99%.Because anchracite duff is strong in the combustion chamber of cyclone firing tube 2 internal combustion, the temperature height, can realize slag tap, liquid lime-ash enters grey slag bucket 6, anchracite duff ash content and other oxious component can be excluded in the combustion chamber of cyclone firing tube 2, can not enter in the boiler furnace 1 of boiler, therefore can not influence boiler output; Simultaneously, cyclone firing tube 2 adopts water-cooling pattern, is equivalent to increase the boiler evaporating heating surface, and boiler output is further improved.
Anchracite duff the flue gas after the internal combustion of the combustion chamber of cyclone firing tube 2 float towards boiler furnace 1 above, with the strong mixed combustion of high temperature fireball that the quadrangle tangential circle of boiler furnace 1 forms, guaranteed the later stage after-flame.Simultaneously, the thermal-flame that sprays into of cyclone firing tube 2 provides stable thermal source for catching fire of DC burner again.
Claims (7)
1, a kind of station boiler anthracite powder combustion plant, include boiler furnace (1), the rear portion that it is characterized in that boiler furnace (1) is equipped with cyclone firing tube (2), the top of cyclone firing tube (2) is provided with anchracite duff is rotated spray gun (3) in the combustion chamber that sprays into cyclone firing tube (2) at a high speed, and the top of cyclone firing tube (2) is provided with the once tangential air outlet (4) of sending into anchracite duff burning required air.
2, station boiler anthracite powder combustion plant according to claim 1, the furnace wall, combustion chamber that it is characterized in that above-mentioned cyclone firing tube (2) are provided with the tangential air outlet of secondary (5) of sending into the required air of guaranteeing fully to burn after anchracite duff catches fire.
3, station boiler anthracite powder combustion plant according to claim 1 is characterized in that tangential air outlet of above-mentioned secondary (5) and once tangential air outlet (4) be not on same horizontal plane.
4, station boiler anthracite powder combustion plant according to claim 1 is characterized in that above-mentioned cyclone firing tube (2) is cylindric cyclone firing tube.
5,, it is characterized in that the bottom of above-mentioned cyclone firing tube (2) is provided with the grey slag bucket (6) of accepting the liquid lime-ash of discharging anchracite duff burning back according to each described station boiler anthracite powder combustion plant of claim 1 to 4.
6, station boiler anthracite powder combustion plant according to claim 5 is characterized in that above-mentioned cyclone firing tube (2) adopts water-cooling pattern.
7, station boiler anthracite powder combustion plant according to claim 6 is characterized in that the above-mentioned cyclone firing tube (2) and the ratio that meets of DC burner are 70%:30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200512368U CN201246737Y (en) | 2008-07-24 | 2008-07-24 | Anthracite duff combustion device of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200512368U CN201246737Y (en) | 2008-07-24 | 2008-07-24 | Anthracite duff combustion device of power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201246737Y true CN201246737Y (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200512368U Expired - Fee Related CN201246737Y (en) | 2008-07-24 | 2008-07-24 | Anthracite duff combustion device of power station boiler |
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| CN (1) | CN201246737Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371271A (en) * | 2015-12-14 | 2016-03-02 | 嘉兴华清能源科技有限公司 | Fluidized bed furnace system for biomass combustion |
| WO2017156824A1 (en) * | 2016-03-17 | 2017-09-21 | 西安交通大学 | Lignite semi-coke oxygen deficient combustion boiler |
-
2008
- 2008-07-24 CN CNU2008200512368U patent/CN201246737Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371271A (en) * | 2015-12-14 | 2016-03-02 | 嘉兴华清能源科技有限公司 | Fluidized bed furnace system for biomass combustion |
| CN105371271B (en) * | 2015-12-14 | 2018-01-19 | 嘉兴华清能源科技有限公司 | Biomass combustion boiling furnace system |
| WO2017156824A1 (en) * | 2016-03-17 | 2017-09-21 | 西安交通大学 | Lignite semi-coke oxygen deficient combustion 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: 20090527 Termination date: 20100724 |