CN201462777U - Circulating fluidize bed coal firing boiler capable of combusting biomass fuel - Google Patents
Circulating fluidize bed coal firing boiler capable of combusting biomass fuel Download PDFInfo
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- CN201462777U CN201462777U CN2009201036880U CN200920103688U CN201462777U CN 201462777 U CN201462777 U CN 201462777U CN 2009201036880 U CN2009201036880 U CN 2009201036880U CN 200920103688 U CN200920103688 U CN 200920103688U CN 201462777 U CN201462777 U CN 201462777U
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Abstract
The utility model discloses a circulating fluidize bed coal firing boiler capable of combusting biomass fuel, which consists of a boiler body, a feeding device, a water cooling wall, a separator, a material returner, a high-temperature superheater, a low-temperature superheater, a coal economizer and an air preheater, wherein the high-temperature superheater is a screen type high-temperature superheater which is arranged in a hearth at the upper part of the boiler body. The boiler can completely combust biomass straws by the improvement of the prior coal-fired circulating fluidize bed boiler.
Description
Technical field
The utility model relates to a kind of circulating fluidized bed combustion coal boiler, especially a kind of circulating fluidized bed combustion coal boiler of incendivity biomass fuel.
Background technology
Along with society growing to energy demand, but promptly reduce as the fossil fuel in main energy sources source.Therefore, seek a kind of reproducible alternative energy source, become the focus of social common concern.Living beings (such as stalk biomass) can be a kind of desirable regenerative resources, and its wide material sources all has a large amount of industry, agricultural and forest discarded object output every year.In the energy resource consumption in the present world, biomass energy consumption accounts for 14% of world's total energy consumption, is only second to oil, coal and natural gas, occupies the 4th.And in developing country, biomass energy accounts for bigger proportion, reaches more than 50%.Compare with fossil fuel, biomass energy has the following advantages: 1, recyclability; 2, low contaminative: sulfur content, the nitrogen content of living beings is low, SOx, NOx in the combustion process are less; 3, carbon dioxide zero discharge can alleviate greenhouse effects effectively.
At present, the energy industry policy of China adopts upward big pressure little, closes down little coal-fired unit.The CFBB power plant that is in below the 130t/h capacity of closing down is very many, and power plant closes down, and most of personnel face shunting and are laid off, and in order to address the above problem, a lot of coal-burning power plants are with the mode biomass burning of transformation, and employing is mixed and burnt or pure burning.But the ratio of mixing burning is generally less than 30%, if pure burning living beings, boiler be difficult to keep stable operation.Simultaneously, mix burning living beings ratio and be lower than 80%, can not adapt to the relevant policies of country again, still need to close down.
In the regular circulation fluidized bed combustion coal burning boiler, flue gas temperature of hearth outlet is 850～950 ℃, to adapt to the needs of coal completing combustion.The ash particle that flue gas carries after the burning separates through cyclone separator, and the high-temp circulating ash that separates returns burner hearth through material returning device, and flue gas and flying dust flow to back-end ductwork, and the superheater of flowing through successively, economizer and air preheater are through arranging to atmosphere behind the deduster.In the regular circulation fluidized bed combustion coal burning boiler, generally be to arrange water-cooling wall in the burner hearth, back-end ductwork is arranged superheater, economizer and air preheater.For the boiler of inferior high temperature sub-high pressure and following parameter, pendant superheater is not set in the burner hearth; Arrange two-stage superheater, i.e. high temperature superheater and low temperature superheater in the back-end ductwork; For the boiler of HTHP, warm pendant superheater during upper furnace is arranged has been arranged high temperature convection superheater and low temperature convection superheater in the back-end ductwork.In the circulating fluidized bed combustion coal boiler, high temperature superheater outlet heating surface wall surface temperature peak, for the medium temperature and medium pressure boiler, this place's vapor (steam) temperature is 450 ℃, wall surface temperature will reach about 500 ℃; For high-temperature high-pressure boiler, this place's vapor (steam) temperature is generally 540 ℃, and wall surface temperature will reach about 590 ℃.
If the circulating fluidized bed combustion coal boiler is without changing into direct pure burning 100% stalk biomass, because alkali metal content is higher in the living beings, cause ash fusion point and coal facies ratio to reduce greatly, the ash of coal holds the some temperature generally greater than 1000 ℃, the ash fusion point temperature of stalk biomass is between 600 ℃～850 ℃, therefore in the regular circulation fluidized-bed combustion boiler during pure burning stalk biomass, if boiler is not transformed, combustion temperature in hearth is 850 ℃～950 ℃, the living beings ash will soften, what have is in a liquid state, and can bond in burner hearth, forms slagging scorification and coking; When the living beings ash is flowed through back-end ductwork with flue gas, bonding and coking can take place also on the higher superheater tube wall of wall surface temperature, influence the heat transfer of heating surface, cause the heating surface tube wall erosion, have a strong impact on the safe and stable operation of boiler.In addition, because the general ash of biomass fuel is less, ash particle is thinner, and the interior ash concentration of burner hearth is lower than normal value during burning.
The circulating fluidized bed combustion coal boiler is by transforming, boiler heating surface and feeding system are adjusted, realized regular circulation fluidized bed combustion coal burning boiler 100% pure burning stalk, fire box temperature is higher than the living beings ash fusion point in the solution circulating fluidized bed combustion coal boiler, in the stove and the problem of bonding and coking easily takes place on the back-end surfaces. the boiler heating surface temperature can be controlled at below the living beings ash fusion point, effectively prevent dust stratification and coking, guarantee the high efficiency boiler reliability service.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of fire coal circulating fluid bed boiler improvement mode, the firing biomass fuel that the CFBB after transforming can 100%.
The technical scheme in the invention for solving the technical problem is:
A kind of circulating fluidized bed combustion coal boiler of incendivity biomass fuel, form by body of heater, charging gear, water-cooling wall, separator, material returning device, high temperature superheater, low temperature superheater, economizer and air preheater, described high temperature superheater is a screen formula high temperature superheater, and screen formula high temperature superheater is installed in the burner hearth of upper of furnace body.
The technical scheme in the invention for solving the technical problem can also be:
The utility model is provided with the recycle stock recovery tube in the separator bottom, and the recycle stock recovery tube is communicated with separator with material returning device, and the recycle stock recovery tube is a water cold sleeve.
Charging gear described in the utility model is the biomass fuel charging gear.
The utility model is provided with the recycle stock adding apparatus between material returning device and body of heater.
The utility model is provided with convection current evaporation heating device between separator and low temperature superheater.
Separator described in the utility model is a cyclone separator.
The evaporation screen of screen formula high temperature superheater described in the utility model is water-cooled evaporation screen.
The beneficial effects of the utility model are:
With prior art the utility model can 100% biomass burning stalk.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the prior art constructions schematic diagram.
The specific embodiment
A kind of circulating fluidized bed combustion coal boiler of incendivity biomass fuel, form by body of heater 2, charging gear 1, water-cooling wall 3, separator 4, material returning device 5, high temperature superheater 6, low temperature superheater 7, economizer 8 and air preheater 9, described high temperature superheater 6 is a screen formula high temperature superheater, and screen formula high temperature superheater is installed in the burner hearth on body of heater 2 tops.Be provided with recycle stock recovery tube 11 in separator 4 bottoms, recycle stock recovery tube 11 is communicated with separator 4 with material returning device 5, and recycle stock recovery tube 11 is a water cold sleeve.Described charging gear 1 is the biomass fuel charging gear.Between material returning device 5 and body of heater 2, be provided with recycle stock adding apparatus 10.Between separator 4 and low temperature superheater 7, be provided with convection current evaporation heating device 12.Described separator 4 is a cyclone separator.The evaporation screen of described screen formula high temperature superheater is water-cooled evaporation screen.
Claims (7)
1. the circulating fluidized bed combustion coal boiler of an incendivity biomass fuel, form by body of heater (2), charging gear (1), water-cooling wall (3), separator (4), material returning device (5), high temperature superheater (6), low temperature superheater (7), economizer (8) and air preheater (9), it is characterized in that: described high temperature superheater (6) is a screen formula high temperature superheater, and screen formula high temperature superheater is installed in the burner hearth on body of heater (2) top.
2. the circulating fluidized bed combustion coal boiler of a kind of incendivity biomass fuel according to claim 1, it is characterized in that: be provided with recycle stock recovery tube (11) in separator (4) bottom, recycle stock recovery tube (11) is communicated with separator (4) with material returning device (5), recycle stock recovery tube (11) is a water cold sleeve.
3. the circulating fluidized bed combustion coal boiler of a kind of incendivity biomass fuel according to claim 1 and 2 is characterized in that: described charging gear (1) is the biomass fuel charging gear.
4. the circulating fluidized bed combustion coal boiler of a kind of incendivity biomass fuel according to claim 3 is characterized in that: be provided with recycle stock adding apparatus (10) between material returning device (5) and body of heater (2).
5. the circulating fluidized bed combustion coal boiler of a kind of incendivity biomass fuel according to claim 4 is characterized in that: be provided with convection current evaporation heating device (12) between separator (4) and low temperature superheater (7).
6. the circulating fluidized bed combustion coal boiler of a kind of incendivity biomass fuel according to claim 5 is characterized in that: described separator (4) is a cyclone separator.
7. the circulating fluidized bed combustion coal boiler of a kind of incendivity biomass fuel according to claim 6 is characterized in that: the evaporation screen of described screen formula high temperature superheater is water-cooled evaporation screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201036880U CN201462777U (en) | 2009-07-11 | 2009-07-11 | Circulating fluidize bed coal firing boiler capable of combusting biomass fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201036880U CN201462777U (en) | 2009-07-11 | 2009-07-11 | Circulating fluidize bed coal firing boiler capable of combusting biomass fuel |
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| Publication Number | Publication Date |
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| CN201462777U true CN201462777U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201036880U Expired - Fee Related CN201462777U (en) | 2009-07-11 | 2009-07-11 | Circulating fluidize bed coal firing boiler capable of combusting biomass fuel |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986024A (en) * | 2010-11-18 | 2011-03-16 | 上海锅炉厂有限公司 | Arrangement structure of all levels of superheaters of circulating fluidized bed boiler |
| CN102537924A (en) * | 2012-02-02 | 2012-07-04 | 哈尔滨锅炉厂有限责任公司 | 670MW supercritical tower type brown coal boiler |
| CN102829474A (en) * | 2012-09-25 | 2012-12-19 | 中国东方电气集团有限公司 | Double-bed system for preventing heating surface of boiler from being contaminated |
| CN103644648A (en) * | 2013-12-29 | 2014-03-19 | 哈尔滨红光锅炉总厂有限责任公司 | Forced water circulation high-capacity hot water boiler of circulating fluidized bed |
| CN105627301A (en) * | 2016-03-16 | 2016-06-01 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler for purely burning furfural residues |
| CN109442462A (en) * | 2018-12-11 | 2019-03-08 | 中国华能集团清洁能源技术研究院有限公司 | It is a kind of to use high sodium coal burning boiler system with low temperature heating surface |
| CN110207104A (en) * | 2019-05-27 | 2019-09-06 | 国粤（深圳）科技投资有限公司 | A kind of outer fossil fuel of furnace burns preceding pretreatment unit |
-
2009
- 2009-07-11 CN CN2009201036880U patent/CN201462777U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986024A (en) * | 2010-11-18 | 2011-03-16 | 上海锅炉厂有限公司 | Arrangement structure of all levels of superheaters of circulating fluidized bed boiler |
| WO2012065356A1 (en) * | 2010-11-18 | 2012-05-24 | 上海锅炉厂有限公司 | Layout structure for superheaters of all stages in circulating fluidized bed boiler |
| CN102537924A (en) * | 2012-02-02 | 2012-07-04 | 哈尔滨锅炉厂有限责任公司 | 670MW supercritical tower type brown coal boiler |
| CN102829474A (en) * | 2012-09-25 | 2012-12-19 | 中国东方电气集团有限公司 | Double-bed system for preventing heating surface of boiler from being contaminated |
| CN102829474B (en) * | 2012-09-25 | 2016-04-06 | 中国东方电气集团有限公司 | A kind of dual bed systems preventing boiler heating surface from staiing |
| US9927119B2 (en) | 2012-09-25 | 2018-03-27 | Dongfang Electric Corporation | Dual-bed system for preventing boiler heating surface from being contaminated |
| CN103644648A (en) * | 2013-12-29 | 2014-03-19 | 哈尔滨红光锅炉总厂有限责任公司 | Forced water circulation high-capacity hot water boiler of circulating fluidized bed |
| CN103644648B (en) * | 2013-12-29 | 2016-02-03 | 哈尔滨红光锅炉总厂有限责任公司 | A kind of Large Copacity Circulating Fluidized Bed Hot Water Boiler of forced water circulation |
| CN105627301A (en) * | 2016-03-16 | 2016-06-01 | 太原锅炉集团有限公司 | Circulating fluidized bed boiler for purely burning furfural residues |
| CN109442462A (en) * | 2018-12-11 | 2019-03-08 | 中国华能集团清洁能源技术研究院有限公司 | It is a kind of to use high sodium coal burning boiler system with low temperature heating surface |
| CN110207104A (en) * | 2019-05-27 | 2019-09-06 | 国粤（深圳）科技投资有限公司 | A kind of outer fossil fuel of furnace burns preceding pretreatment unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guantao Xin Neng living beings Thermal Power Co., Ltd Assignor: Hebei Xinneng Electric Power Co., Ltd. Contract record no.: 2013130000107 Denomination of utility model: Circulating fluidize bed coal firing boiler capable of combusting biomass fuel Granted publication date: 20100512 License type: Exclusive License Record date: 20131009 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20150711 |
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| EXPY | Termination of patent right or utility model |