CN201992632U - Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler - Google Patents
Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler Download PDFInfo
- Publication number
- CN201992632U CN201992632U CN2011200718926U CN201120071892U CN201992632U CN 201992632 U CN201992632 U CN 201992632U CN 2011200718926 U CN2011200718926 U CN 2011200718926U CN 201120071892 U CN201120071892 U CN 201120071892U CN 201992632 U CN201992632 U CN 201992632U
- Authority
- CN
- China
- Prior art keywords
- coal
- nozzle
- coal feeding
- air
- feeding pipeline
- 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
Links
Images
Abstract
The utility model relates to an annular sealing nozzle purging and coal feeding pipeline of a fluidized bed boiler, comprising a coal feeding pipeline of a fluidized bed boiler. The enclosed side of an upper coal channel of the coal feeding pipeline is provided with an annular air chamber having the suction function; the annular air chamber and a lower opening at the upper coal channel of the coal feeding pipeline are both communicated with a lower coal channel of the coal feeding pipeline; the annular sealing nozzle purging and coal feeding pipeline of a fluidized bed boiler further has one or two of the following structures: one structure is that a nozzle capable of blowing hot purging air to the coal feeding pipe is arranged on the coal feeding pipeline and at the elbow of the lower coal channel; another structure is that a nozzle capable of blowing hot feeding coal air into the furnace is arranged at a coal feeding hole near the furnace wall at the lower part; the annular sealing nozzle purging and coal feeding pipeline of a fluidized bed boiler is provided with an upper air chamber, from which both annular air in the annular air chamber and hot purging air at the nozzle at the elbow come; the annular sealing nozzle purging and coal feeding pipeline of a fluidized bed boiler is provided with a lower air chamber, from which the hot coal feeding air of the nozzle at the coal feeding hole near the furnace wall at the lower part comes. The annular sealing nozzle purging and coal feeding pipeline of a fluidized bed boiler can eliminate cold sealing air of a belt coal feeder, further can prevent blockage caused by adhesion of wet coal on the inner wall of the upper coal channel and the elbow position; and the air chambers improve the static pressure of hot purging air, and the nozzles improve the dynamic pressure of hot purging air.
Description
Technical field
The utility model relates to a kind of fluidized-bed combustion boiler ring packing nozzle purging and broadcasts coal pipeline.
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).
Referring to shown in Figure 1, power station boiler hearth of circulating fluidized bed 1 as same cuboid, four sides furnace wall (definition front wall 11, back wall 12) is welded by water screen tube row and band steel, and " water-cooling wall " just becomes the synonym of " furnace wall ".Coal feeding hole 6 is generally opened in lower furnace portion (about 1.6 meters of distance bed bottoms), and coal-fired (being mingled with a cold wind) expects burning then in 2 by the bed that coal supply pipeline (being entered by coal pipeline import 41, through last coal pipeline 4 and coal unloading tube road 5) enters lower furnace portion.Because the bed material 2 of lower furnace portion boiling and the flue gas that rises have certain pressure to make coal feeding hole 6 have back pressure, the high-temperature flue gas of certain pressure can enter the coal supply pipeline and enter belt coal-feeding machine 3 then and burn out belt.The accident that burns out belt happens occasionally in many power plant, has had a strong impact on ordinary production.
Way commonly used now is that this cold sealing wind enters burner hearth together along coal supply pipeline and coal with the bigger cold wind sealing belt coal-feeding machine of pressure ratio; When coal moisture was big, therefore cold sealing wind did not have drying capacity to wet coal, introduces heat primary air usually and purges and broadcast coal.This cold sealing wind air quantity is very big, and temperature is about 20 ℃, and entering finally also will absorb heat behind the boiler to 150 ℃ leaves boiler row to atmosphere, has increased flue gas loss, has reduced boiler combustion efficiency.The purging wind and the coal spread wind effect of existing CFBB coal-feeding tube are all very poor, and the chute blockage phenomenon often takes place, reason be purge wind and coal spread wind do not have air compartment and nozzle show as intensity too a little less than.Particularly coal spread wind does not have the coal effect of broadcasting because of it, cause rough coal spoil particle to clash into coal feeding hole for a long time, Fire and abrasion resistant material in the stove is come off, water-cooling wall just exposed out after Fire and abrasion resistant material came off, exposed water screen tube is just revealed by coal gangue particle brinelling soon, must shutdown maintenance after the leakage.Seriously influence normal production.
Summary of the invention
The purpose of this utility model provides a kind of fluidized-bed combustion boiler ring packing nozzle purging and broadcasts coal pipeline, utilizes this cover facility, can overcome all drawbacks of existing coal-feeding tube.
For achieving the above object, the utility model is taked following design:
A kind of fluidized-bed combustion boiler ring packing nozzle purges and broadcasts coal pipeline, includes the coal supply pipeline of fluidized-bed combustion boiler, in the annular air compartment that side is provided with swabbing action that encloses of coal supply conduit upper breeching; The under shed of this annular air compartment and coal supply conduit upper breeching all links with the bottom breeching of coal supply pipeline.
It also has in the following array structure one or both: the first is provided with nozzle from wind to coal supply pipeline hot blow that can sweep in breeching elbow, coal supply pipeline upper and lower part; Its two be establish at the coal feeding hole place of the nearly furnace wall in bottom can be in furnace chamber the nozzle of hot coal spread wind.
Set up an ipper air chamber, annular wind in the described annular air compartment and elbow nozzle hot blow are swept wind jointly from this ipper air chamber; Set up a lower air chamber, the hot coal spread wind of nozzle at the coal feeding hole place of the nearly furnace wall in described bottom is from this lower air chamber.
The utility model has the advantages that:
1. annular heat primary air sealing wind has swabbing action to the top breeching, can remove the cold sealing wind of belt coal-feeding machine;
2. annular heat primary air sealing wind has heat effect to the top breeching, has prevented from that wet coal is stained with to be bonded at the obstruction that causes on the breeching inwall of top;
3. the elbow is provided with hot blow and sweeps wind air compartment and nozzle, has prevented from that wet coal is stained with to be bonded at the obstruction that bend part causes; Air compartment has improved the static pressure that hot blow is swept wind, and nozzle improved the dynamic pressure that hot blow is swept wind;
4. the coal feeding hole place is provided with hot coal spread wind air compartment and the nozzle near furnace wall, and rough coal spoil particle is broadcasted sowing, and the back is high up in the air to fall into burner hearth, has avoided the water screen tube wearing and tearing of coal feeding hole place to reveal.
Description of drawings
Fig. 1 broadcasts coal pipeline structural representation (frame of broken lines inside is divided into cold and hot wind sealing purging and broadcasts coal pipeline) for the cold and hot wind sealing of this existing fluidized-bed combustion boiler purges.
Fig. 2 broadcasts the coal pipeline structural representation for the utility model fluidized-bed combustion boiler ring packing nozzle purges.
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 utility model fluidized-bed combustion boiler ring packing nozzle purges broadcasts the improvement that coal pipeline is based on the coal supply pipeline of original fluidized-bed combustion boiler, and it is the annular air compartment 1 that side is provided with swabbing action that encloses at coal supply conduit upper breeching 4; The under shed of this annular air compartment and coal supply conduit upper breeching all links with the bottom breeching 5 of coal supply pipeline.
Another improvement of the present utility model is: be provided with nozzle 2 from wind to coal supply pipeline hot blow that can sweep in breeching elbow, coal supply pipeline upper and lower part.
An improvement more of the present utility model is: in the bottom coal feeding hole 6 places of nearly furnace wall 11 establish can be in furnace chamber the nozzle 7 of hot coal spread wind.
For above-mentioned improvement, and can possess simultaneously, also can only adopt one of them.
Set up an ipper air chamber 3, the annular wind in the described annular air compartment 1 and the hot blow of elbow nozzle 2 are swept wind can be jointly from this ipper air chamber.Set up a lower air chamber 8, the hot coal spread wind of the nozzle 7 at the coal feeding hole place of the nearly furnace wall in described bottom is from this lower air chamber.
The utility model fluidized-bed combustion boiler ring packing nozzle purging is broadcast coal pipeline and has been designed annular air compartment, annular heat once sealing wind is provided, go out the interruption-forming annular jet at the top breeching, the top breeching is had swabbing action, thereby can remove the cold sealing wind of belt coal-feeding machine.Having designed in the elbow has the hot blow of air compartment and nozzle to sweep wind, can prevent that coal moisture from connecing an obstruction when big.Designed the hot coal spread wind that air compartment and nozzle are arranged of close furnace wall at bottom coal feeding hole place, rough coal spoil particle is broadcasted sowing, and the back is high up in the air to fall into burner hearth, has alleviated the wearing and tearing to Fire and abrasion resistant material in the stove greatly, has avoided the water screen tube wearing and tearing of coal feeding hole place to reveal.
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 (4)
1. a fluidized-bed combustion boiler ring packing nozzle purges and broadcasts coal pipeline, includes the coal supply pipeline of fluidized-bed combustion boiler, it is characterized in that: in the annular air compartment that side is provided with swabbing action that encloses of coal supply conduit upper breeching; The under shed of this annular air compartment and coal supply conduit upper breeching all links with the bottom breeching of coal supply pipeline.
2. fluidized-bed combustion boiler ring packing nozzle according to claim 1 purges and broadcasts coal pipeline, and it is characterized in that it also has in the following array structure one or both: the first is provided with nozzle from wind to coal supply pipeline hot blow that can sweep in breeching elbow, coal supply pipeline upper and lower part; Its two be establish at the coal feeding hole place of the nearly furnace wall in bottom can be in furnace chamber the nozzle of hot coal spread wind.
3. fluidized-bed combustion boiler ring packing nozzle according to claim 2 purges and broadcasts coal pipeline, and it is characterized in that: set up an ipper air chamber, annular wind in the described annular air compartment and elbow nozzle hot blow are swept wind jointly from this ipper air chamber.
4. fluidized-bed combustion boiler ring packing nozzle according to claim 2 purges and broadcasts coal pipeline, and it is characterized in that: set up a lower air chamber, the hot coal spread wind of nozzle at the coal feeding hole place of the nearly furnace wall in described bottom is from this lower air chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200718926U CN201992632U (en) | 2011-03-18 | 2011-03-18 | Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200718926U CN201992632U (en) | 2011-03-18 | 2011-03-18 | Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201992632U true CN201992632U (en) | 2011-09-28 |
Family
ID=44669121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200718926U Expired - Fee Related CN201992632U (en) | 2011-03-18 | 2011-03-18 | Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201992632U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563631A (en) * | 2012-02-16 | 2012-07-11 | 广东电网公司电力科学研究院 | Blanking port integrated blanking device for biomass fuel circulating fluidized bed boiler |
| CN102607021A (en) * | 2012-03-09 | 2012-07-25 | 中国神华能源股份有限公司 | Coal feeder, coal feeding system and circulating fluidized bed boiler |
| CN102997229A (en) * | 2012-12-17 | 2013-03-27 | 江联重工股份有限公司 | Slight fuel accumulation ignition increasing mechanical feeding method |
| CN103912870A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Wear-resistant type coal supply pipe structure for circulating fluidized bed boiler |
| CN103953923A (en) * | 2014-05-04 | 2014-07-30 | 四川省宜宾惠美线业有限责任公司 | Coal distribution device |
| CN104315504A (en) * | 2014-08-21 | 2015-01-28 | 中国华能集团清洁能源技术研究院有限公司 | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method |
-
2011
- 2011-03-18 CN CN2011200718926U patent/CN201992632U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563631A (en) * | 2012-02-16 | 2012-07-11 | 广东电网公司电力科学研究院 | Blanking port integrated blanking device for biomass fuel circulating fluidized bed boiler |
| CN102607021A (en) * | 2012-03-09 | 2012-07-25 | 中国神华能源股份有限公司 | Coal feeder, coal feeding system and circulating fluidized bed boiler |
| CN102607021B (en) * | 2012-03-09 | 2014-09-17 | 中国神华能源股份有限公司 | Coal feeder, coal feeding system and circulating fluidized bed boiler |
| CN102997229A (en) * | 2012-12-17 | 2013-03-27 | 江联重工股份有限公司 | Slight fuel accumulation ignition increasing mechanical feeding method |
| CN102997229B (en) * | 2012-12-17 | 2015-07-22 | 江联重工股份有限公司 | Slight fuel accumulation ignition increasing mechanical feeding method |
| CN103912870A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Wear-resistant type coal supply pipe structure for circulating fluidized bed boiler |
| CN103953923A (en) * | 2014-05-04 | 2014-07-30 | 四川省宜宾惠美线业有限责任公司 | Coal distribution device |
| CN103953923B (en) * | 2014-05-04 | 2016-02-10 | 四川省宜宾惠美线业有限责任公司 | A kind of coal sorting feeder |
| CN104315504A (en) * | 2014-08-21 | 2015-01-28 | 中国华能集团清洁能源技术研究院有限公司 | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method |
| CN104315504B (en) * | 2014-08-21 | 2017-01-11 | 华能国际电力股份有限公司 | A circulating fluidized bed boiler capable of inhibiting formation of a combustion high-temperature region and an inhibiting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201992632U (en) | Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler | |
| CN103644562A (en) | Combined type energy-saving biomass fuel boiler | |
| CN2786440Y (en) | Boiler with wall type arranged burner capable of preventing water-cooled wall from high temperature corrosion and slag bonding | |
| CN203273866U (en) | Biomass fuel boiler | |
| CN104235831A (en) | Biomass particle combustion furnace | |
| CN104197338A (en) | High-temperature cyclone separation type three-waste co-combustion furnace | |
| CN101846312B (en) | Smokeless and dustless coal-fired furnace | |
| CN203718753U (en) | Composite combustion device | |
| CN102095254B (en) | Organic heat carrier boiler of fluidized bed, with low cost, environment protection, energy saving and emission reduction | |
| CN204574473U (en) | A kind of novel biomass environment-friendly energy-saving hot blast furnace | |
| CN201652305U (en) | Biomass fuel steam boiler | |
| CN203963922U (en) | Biomass ebullition burning steam boiler | |
| CN202392992U (en) | Full-automatic horizontal-type hot air and hot water multipurpose boiler | |
| CN208983329U (en) | Dual-purpose type hot-blast stove | |
| CN111006201A (en) | Biomass burner | |
| CN203095978U (en) | Biomass carbonization system | |
| CN203336814U (en) | Horizontal hot water boiler | |
| CN201615594U (en) | High-efficient energy-saving normal pressure hot water boiler | |
| CN101280915A (en) | W flame boiler furnace arranging air nozzle on side wall | |
| CN204901790U (en) | Novel chain grate furnace | |
| CN205878140U (en) | Biomass boiler secondary anemochory wind structure | |
| CN104089282A (en) | Biomass fluidized combustion steam boiler | |
| CN201475988U (en) | Fly ash recirculation device | |
| CN103423866A (en) | Hot-blast stove with functions of multi-point air distribution, positive and negative combustion and sufficient combustion | |
| CN202328763U (en) | Full-automatic horizontal type hot air boiler |
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: 20110928 Termination date: 20120318 |