CN2777375Y - Hood for fluidized bed boiler - Google Patents
Hood for fluidized bed boiler Download PDFInfo
- Publication number
- CN2777375Y CN2777375Y CN 200520081644 CN200520081644U CN2777375Y CN 2777375 Y CN2777375 Y CN 2777375Y CN 200520081644 CN200520081644 CN 200520081644 CN 200520081644 U CN200520081644 U CN 200520081644U CN 2777375 Y CN2777375 Y CN 2777375Y
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- CN
- China
- Prior art keywords
- blast cap
- funnel
- utility
- tube
- funnel cap
- 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.)
- Expired - Fee Related
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to a hood for fluidized bed boilers, which belongs to the field of fluidized bed combustion devices and the utility model comprises a cylindrical funnel cap tube and a funnel cap head arranged on the upper end of the funnel cap tube. The utility model is characterized in that the funnel cap head is spherical or arc vault construction, the wall thickness of the funnel cap is larger than the wall thickness of the funnel cap tube and the tube body of the funnel cap tube is provided with an upwards inclined funnel hole nozzle. Owing to adopting the spherical or arc vault construction funnel cap head and the thickened cowl wall thickness, with the upwards inclined arrangement of the funnel hole, the particle flow caused by the jetted airflow can not direct hurt other funnel caps. Therefore, the utility model extends the wear-resisting performance and the service life of the funnel cap, the service life is exponentially increased in the condition of not increasing manufacturing cost and the utility model can be widely used for the circulating fluidized bed boilers with various standards.
Description
Technical field
The utility model belongs to the fluidized bed combustion apparatus field, relates in particular to a kind of blast cap that is used for CFBB.
Background technology
Combustion technology of circulating fluidized is a kind of clean coal combustion technology that recent two decades develops rapidly.This technology is at station boiler, and fields such as Industrial Boiler and offal treatment utilization have obtained wide range of commercial and used, and develops to the large circulating fluidized bed boiler of hundreds of thousands multikilowatt scale.CFBB has that coal adaptability is strong, efficiency of combustion is high, pollutant emission is low and advantage such as load adjustment ability is good, can predict, and following several years will be the important period of CFBB develop rapidly.
The operation principle of CFBB is: send into burner hearth after coal is broken into particle below the 10mm, there are a large amount of material in the stove simultaneously, by the lower furnace portion air distribution, make fuel in the bed material, be fluidized combustion, and, send the solid particle that separates back to device by flying dust and send into the burner hearth burning once more at furnace outlet installation cyclone separator.Its operation characteristic is that fuel repeatedly circulates in stove with the bed material, has time enough to burnout, and the flying dust sulfur content is descended, and efficiency of combustion improves.
Blast cap is the main consumable accessory on the CFBB, and hundreds and thousands of blast caps all are housed on every boiler, so directly affects the result of use of boiler and the productivity effect of power plant the service life of blast cap.
Because the restriction of manufacturing process, existing blast cap are made of with the umbrella shape or the conical cowl head that are positioned at blast cap tube upper end the cylindrical blast cap tube of a hollow mostly, its cylindrical blast cap tube is identical with the material of blast cap head, and wall thickness equates; Be distributed with tens or tens horizontally disposed eyes of wind on the blast cap cylindrical shell, compress wind enters from blast cap cylindrical shell bottom, outwards sprays from the eye of wind to blow out, for the fuel in the material bed provides burning required oxygen.
Because blast cap is under the condition of high temperature all the time, its top more is subjected to the rubbing action of the slag that glides above, thereby the blast cap top weares and teares easily, causes that blast cap is whole to be damaged.Simultaneously, adopt wind cap that the eye of wind spout of back air draft cap is directly purged front-seat blast cap " head ", the formed grain flow of its ejection gas directly forms impact wear to other blast caps, running time is long slightly, and the particle of fuel or lime-ash just is easy to the crown of front-seat blast cap and cap body " are cut " to fall and form jet.So, further aggravate the disorder in air force flow field again, both influenced fluidization quality, increased the wearing and tearing of blast cap again.
How to develop a kind of can improve its anti-wear performance can avoid again to around the blast cap blast cap that forms " purgings " effect be that the current techniques personnel are just in a difficult problem of idea solution.
The utility model content
Technical problem to be solved in the utility model provides that a kind of its anti-wear performance is good, long service life, can avoid to around blast cap form the fluidized-bed combustion boiler blast cap of " purgings " effect energy.
The technical solution of the utility model is: a kind of fluidized-bed combustion boiler blast cap is provided, comprises a columnar blast cap tube and the blast cap head that is positioned at blast cap tube upper end, it is characterized in that: the blast cap head is sphere or arc vault construction; The wall thickness of blast cap head is greater than the wall thickness of blast cap tube; Acclivitous eye of wind spout is set on the cylindrical shell of blast cap tube.
The wall thickness of above-mentioned blast cap head is thick 1～2.5 times of blast cap barrel.
Above-mentioned eye of wind spout is evenly opened on the cylindrical shell that is distributed in the blast cap tube.
Compared with the prior art, the utility model has the advantages that:
1. adopt the blast cap head of sphere or arc vault construction, and thickeied the wall thickness of the main worn area of blast cap, prolonged the anti-wear performance and the service life of blast cap greatly.
2. the eye of wind spout setting that is inclined upwardly, so its ejection grain flow that air-flow caused can directly " not injure " other blast cap has correspondingly prolonged blast cap service life.
3. eye of wind spout is evenly opened cloth, and can make cloth wind more even, effectively improves fluidization quality, impels the coarse grained disturbance in bottom, avoids the bed material deposition, reduces ash content carbon, thereby has improved the thermal efficiency of boiler, and boiler operatiopn is stable more, reliable.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is the structural representation of existing blast cap;
Fig. 2 is a structural representation of the present utility model.
1 is the blast cap head among the figure, and 2 is eye of wind spout, and 3 is the blast cap tube.
The specific embodiment
Among Fig. 1, existing blast cap is made of columnar blast cap tube 3 and the umbrella shape or the conical cowl head 1 that are positioned at blast cap tube upper end, and the material of its cylindrical blast cap tube and blast cap head is identical, wall thickness equates; Be distributed with the horizontally disposed eye of wind 2 on the blast cap cylindrical shell, compress wind enters from blast cap cylindrical shell bottom, outwards sprays from the eye of wind to blow out, for the fuel in the material bed provides burning required oxygen.
Among Fig. 2, blast cap head 1 of the present utility model is sphere or arc vault construction, and the wall thickness of blast cap head is provided with acclivitous eye of wind spout 2 greater than the wall thickness of blast cap tube 3 on the cylindrical shell of blast cap tube.
The wall thickness of above-mentioned blast cap head is thick 1～2.5 times of blast cap barrel; Its eye of wind spout is evenly opened on the cylindrical shell that is distributed in the blast cap tube.
Owing to adopted the blast cap head of sphere or arc vault construction, and thickeied the wall thickness of blast cap, add the eye of wind setting that is inclined upwardly, its ejection grain flow that air-flow caused can directly " not injure " other blast cap, the anti-wear performance and the service life of blast cap have been prolonged greatly, under the prerequisite that does not increase manufacturing cost, significantly improve its service life.Blast cap after the improvement has carried out contrast test in units such as Shandong Bo Hui power plant, Zibo prosperous victory power plant and mountain aluminium power plant respectively, its service life by original half a year about, bring up to present more than 1 year, all be enhanced about more than once than existing blast cap, boiler maintenance, the maintenance workload of applying unit had both been reduced, reduce the maintenance maintenance expense again, reduced operation expense, helped improving the overall economic efficiency of applying unit.
The utility model can be widely used in the CFBB of all size.
Claims (3)
1. a fluidized-bed combustion boiler blast cap comprises a columnar blast cap tube and the blast cap head that is positioned at blast cap tube upper end, it is characterized in that:
The blast cap head is sphere or arc vault construction;
The wall thickness of blast cap head is greater than the wall thickness of blast cap tube;
Acclivitous eye of wind spout is set on the cylindrical shell of blast cap tube.
2. according to the described fluidized-bed combustion boiler blast cap of claim 1, the wall thickness that it is characterized in that described blast cap head is thick 1～2.5 times of blast cap barrel.
3. according to the described fluidized-bed combustion boiler blast cap of claim 1, it is characterized in that described eye of wind spout evenly opens on the cylindrical shell that is distributed in the blast cap tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520081644 CN2777375Y (en) | 2005-03-23 | 2005-03-23 | Hood for fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520081644 CN2777375Y (en) | 2005-03-23 | 2005-03-23 | Hood for fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2777375Y true CN2777375Y (en) | 2006-05-03 |
Family
ID=36744759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520081644 Expired - Fee Related CN2777375Y (en) | 2005-03-23 | 2005-03-23 | Hood for fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2777375Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287684A (en) * | 2016-01-18 | 2017-01-04 | 无锡华光锅炉股份有限公司 | A kind of blast cap for CFBB |
| CN106855247A (en) * | 2017-02-24 | 2017-06-16 | 泉州市明燃厨房设备有限公司 | For the control wind cylinder of combustion furnace combustion chamber |
| CN113773879A (en) * | 2021-10-08 | 2021-12-10 | 新疆宜化化工有限公司 | Hood for circulating fluidized bed gasification furnace |
-
2005
- 2005-03-23 CN CN 200520081644 patent/CN2777375Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287684A (en) * | 2016-01-18 | 2017-01-04 | 无锡华光锅炉股份有限公司 | A kind of blast cap for CFBB |
| CN106855247A (en) * | 2017-02-24 | 2017-06-16 | 泉州市明燃厨房设备有限公司 | For the control wind cylinder of combustion furnace combustion chamber |
| CN106855247B (en) * | 2017-02-24 | 2023-12-19 | 泉州市明燃厨房设备有限公司 | Air control cylinder for combustion furnace core |
| CN113773879A (en) * | 2021-10-08 | 2021-12-10 | 新疆宜化化工有限公司 | Hood for circulating fluidized bed gasification furnace |
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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 |