CN202018035U - Fluidized bed boiler provided with plug-type air pipes - Google Patents
Fluidized bed boiler provided with plug-type air pipes Download PDFInfo
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- CN202018035U CN202018035U CN2011200719219U CN201120071921U CN202018035U CN 202018035 U CN202018035 U CN 202018035U CN 2011200719219 U CN2011200719219 U CN 2011200719219U CN 201120071921 U CN201120071921 U CN 201120071921U CN 202018035 U CN202018035 U CN 202018035U
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- boiler
- fluidized bed
- plug
- secondary air
- bed boiler
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Abstract
The utility model discloses a fluidized bed boiler provided with plug-type air pipes, which comprises a fluidized bed boiler body, wherein, the fluidized bed boiler body comprises a primary air duct; a plurality of secondary air ducts are arranged on a front boiler wall and a rear boiler wall of a cone water wall at the lower part of a furnace chamber; and the secondary air ducts are inserted in the boiler, and the extension length ranges from 0.8m to 1.5m after each secondary air duct penetrates through the boiler walls. A group of plug-type primary air pipes are arranged at the bottom part inside the furnace chamber of the circulating fluidized bed boiler. The fluidized bed boiler improves the penetrability of secondary air jet flow, and can improve the burnout degree of coal particles in a center area of the furnace chamber, so that the carbon content in fly ashes of the boiler can be reduced greatly, and the energy waste is reduced.
Description
Technical field
The utility model relates to a kind of fluidized-bed combustion boiler that has the plug-in type airduct.
Background technology
China uses the maximum country of CFBB (CFB boiler) in power plant in the world, the big or small recirculating fluidized bed station boiler that has moved has more than 3000, wherein the above large-size circulating fluidized bed station boiler of 410t/h has more than 140, and the above large-size circulating fluidized bed station boiler of 1025t/h has more than 20 (also having more than 50 builds).
Power station circulating fluid bed boiler body 1 furnace wall before lower furnace portion cone water-cooling wall has been arranged tens secondary air channels (pipe) with the back furnace wall, and secondary wind provides oxygen and is used for the after-flame degree that overheavy firing improves coal particle.Because existing tens secondary wind outlets (comprising overfiren air port 21 ' and following overfiren air port 22 ') all are (referring to Fig. 1) concordant with furnace wall, two rows of preceding furnace wall 11 and back furnace wall 12 go up overfiren air port 21 ' and reach 6 meters apart.Because boiler hearth of circulating fluidized bed bottom granule density is bigger, the single secondary wind jet of going up can not penetrate 3 meters, and this has just caused CFB boiler for deeply direction central area to lack wind is anoxic, thereby the after-flame degree that has reduced coal particle causes energy waste.Cause phosphorus content very big usually (can reach 10-20%) in the CFBB ash discharge.
Fig. 1 shows the structure of existing CFBB, and wherein 3 is an air channel.
Summary of the invention
The purpose of this utility model provides a kind of fluidized-bed combustion boiler that has the plug-in type airduct, and it can realize center oxygenation, to overcome the defective of prior art.
For achieving the above object, the utility model is taked following design:
A kind of fluidized-bed combustion boiler that has the plug-in type airduct comprises the fluidized-bed combustion boiler body, has the air channel one time, is furnished with some secondary air channels on furnace wall and the back furnace wall before lower furnace portion cone water-cooling wall; Wherein, secondary air channel inserts in the stove on each, and it penetrates the length that prolongs behind the furnace wall is 0.8～1.5 meter.
Described on each secondary air channel to penetrate the length that prolongs behind the furnace wall be 1 meter.
Airduct of one group of plug-in type is arranged at the bottom in boiler hearth of circulating fluidized bed.
The utility model has the advantages that:
1) goes up secondary air channel and insert interior 1 meter of stove, improved the energy penetrability of last secondary wind jet;
2) airduct of one group of plug-in type is established in the bottom in the fluid bed boiler furnace, can improve the after-flame degree of burner hearth center coal particle, so reduce the phosphorus content in the boiler fly ash greatly, reduces energy waste.
Description of drawings
Fig. 1 is existing circulating fluid bed boiler structure schematic diagram.
Fig. 2 is a kind of fluidized-bed combustion boiler center oxygenation plug-in type airduct structural representation for the utility model relates to.
Below in conjunction with drawings and the specific embodiments the utility model is described in further details.
The specific embodiment
Consult shown in Figure 2ly, the fluidized-bed combustion boiler that the utility model has the plug-in type airduct comprises fluidized-bed combustion boiler body 1, has air channel 3 one time, is furnished with some secondary air channels 21,22 on furnace wall 11 and the back furnace wall 12 before lower furnace portion cone water-cooling wall; Described on each secondary air channel 21 insert in the stoves, it penetrates the length that prolongs behind the furnace wall is 0.8～1.5 meter.Described on each secondary air channel 21 penetrate the length that prolongs behind the furnace wall should be 1 meter for good.
Bottom in boiler hearth of circulating fluidized bed can be provided with airduct 31 of one group of plug-in type, and it cooperates an air channel 3.
It is to prolong about 1 meter again after the last secondary air channel of both walls all passes furnace wall that the last secondary air channel that the utility model has a fluidized-bed combustion boiler of plug-in type airduct inserts in the stove, two rows of preceding like this furnace wall and back furnace wall go up overfiren air port and have only 4 meters apart, and single upward secondary wind jet only needs to penetrate 2 meters.It is no problem that the single upward secondary wind jet of production practices proof penetrates 2 meters.Technical solutions of the utility model have increased the oxygen amount of burner hearth center, thereby have strengthened the after-flame degree of coal particle, can reduce the phosphorus content in the boiler fly ash greatly, reduce energy waste.
The various embodiments described above can not break away under the scope of the present utility model in addition some variations, thus above explanation comprises and accompanying drawing shown in structure should be considered as exemplary, but not in order to limit the protection domain that the utility model is applied for a patent.
Claims (3)
1. a fluidized-bed combustion boiler that has the plug-in type airduct comprises the fluidized-bed combustion boiler body, has the air channel one time, is furnished with some secondary air channels on furnace wall and the back furnace wall before lower furnace portion cone water-cooling wall; It is characterized in that: wherein, secondary air channel inserts in the stove on each, and it penetrates the length that prolongs behind the furnace wall is 0.8～1.5 meter.
2. fluidized-bed combustion boiler according to claim 1 is characterized in that: described on each secondary air channel to penetrate the length that prolongs behind the furnace wall be 1 meter.
3. fluidized-bed combustion boiler according to claim 1 is characterized in that: airduct of one group of plug-in type is arranged at the bottom in boiler hearth of circulating fluidized bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200719219U CN202018035U (en) | 2011-03-18 | 2011-03-18 | Fluidized bed boiler provided with plug-type air pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200719219U CN202018035U (en) | 2011-03-18 | 2011-03-18 | Fluidized bed boiler provided with plug-type air pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202018035U true CN202018035U (en) | 2011-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200719219U Expired - Fee Related CN202018035U (en) | 2011-03-18 | 2011-03-18 | Fluidized bed boiler provided with plug-type air pipes |
Country Status (1)
| Country | Link |
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| CN (1) | CN202018035U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604119A (en) * | 2013-11-28 | 2014-02-26 | 山东科技大学 | Circulating fluidized bed overgrate air distribution method and special-purpose boiler |
| CN103939892A (en) * | 2014-04-02 | 2014-07-23 | 无锡华光锅炉股份有限公司 | Secondary air distribution structure for circulating fluidized bed boiler |
| CN110542080A (en) * | 2018-05-29 | 2019-12-06 | 中国电力工程顾问集团华北电力设计院有限公司 | Swirl injection device for embedded pipe of directly-upper secondary air furnace of CFB (circulating fluid bed) boiler |
-
2011
- 2011-03-18 CN CN2011200719219U patent/CN202018035U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604119A (en) * | 2013-11-28 | 2014-02-26 | 山东科技大学 | Circulating fluidized bed overgrate air distribution method and special-purpose boiler |
| CN103604119B (en) * | 2013-11-28 | 2016-06-08 | 山东科技大学 | Circulating fluidized bed secondary air joins wind method and boiler dedicated |
| CN103939892A (en) * | 2014-04-02 | 2014-07-23 | 无锡华光锅炉股份有限公司 | Secondary air distribution structure for circulating fluidized bed boiler |
| CN110542080A (en) * | 2018-05-29 | 2019-12-06 | 中国电力工程顾问集团华北电力设计院有限公司 | Swirl injection device for embedded pipe of directly-upper secondary air furnace of CFB (circulating fluid bed) boiler |
| CN110542080B (en) * | 2018-05-29 | 2024-05-10 | 中国电力工程顾问集团华北电力设计院有限公司 | Built-in pipe rotational flow blowing device in overgrate air furnace directly above CFB 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: 20111026 Termination date: 20120318 |