CN201344522Y - Combustion-use biomass multi-channel circulating fluidized bed boiler - Google Patents
Combustion-use biomass multi-channel circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN201344522Y CN201344522Y CNU2008201929956U CN200820192995U CN201344522Y CN 201344522 Y CN201344522 Y CN 201344522Y CN U2008201929956 U CNU2008201929956 U CN U2008201929956U CN 200820192995 U CN200820192995 U CN 200820192995U CN 201344522 Y CN201344522 Y CN 201344522Y
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- end flue
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Abstract
The utility model relates to a combustion-use biomass multi-channel circulating fluidized bed boiler, which comprises a hearth, a material circulating system and a tail flue, wherein a tail front flue and a tail middle flue are arranged side by side and share one flue partition wall; the inlet of the tail front flue is connected with a cyclone separator, and the outlet is connected with the inlet of the tail middle flue; and the outlet of the tail middle flue is connected with the inlet of a tail rear flue. The combustion-use biomass multi-channel circulating fluidized bed boiler can improve the boiler efficiency, and reduce or alleviate the abrasion, corrosion, adhering slag, dust accumulation, dust blockage, and so on during production using biomass fuel, thereby keeping the ash/slag activity, lowering the carbon content in the ash/slag, and facilitating comprehensive use of the ash/slag.
Description
Technical field
The utility model relates to biomass circulating fluid bed field of boilers, is a kind of biological substance for combustion multichannel CFBB specifically.
Technical background
The world today, the source of the energy mainly are fossil fuel.And fossil fuel, as coal, oil and natural gas, its resource is limited, will peter out.21 century, living beings have been subjected to the great attention of various countries as a kind of clean fuel and regenerative resource.How this huge clean fuel is changed into the important subject that the available energy is the new energy development field.
Living beings generally contain higher alkali metal, and (this will cause ash fusion point to reduce, and bring many problems to combustion process for Na, K) oxide and salt.High basic metal content living beings are when burning, and alkali metal can cause the serious sintering of ash in the combustion chamber.
SiO in some living beings ash
2Content is very high, the serious wear of back-end surfaces.
Some living beings Cl content is than higher.Will etching apparatus in combustion process.
Simultaneously, the ash that produces behind the biomass fuel combustion gently glues, and causes the dust stratification and the stifled ash of back-end surfaces easily.
At present, the boiler of burning-used biologic mass fuel mainly contains several forms such as fixed bed boiler and CFBB.Comparatively speaking, recirculating fluidized bed can adapt to the fugitive constituent of rice husk well and separate out rapidly, fixed carbon is difficult to the characteristics of after-flame, overcome the inefficient disadvantage of fixed bed and boiling furnace combustion, also have low NOx drainage, the lime-ash activity is good, and fuel tolerance is good, advantages such as load regulation range is big, and is easy and simple to handle.Circulating fluidized bed technique is one of effective way that living beings are developed as clean energy resource.
Yet because the particularity of biomass fuel, conventional CFBB can not well overcome phenomenons such as burn into dust stratification and stifled ash, can not effectively guarantee the safe and continuous operation of boiler.
Summary of the invention
The purpose of this utility model is: a kind of biological substance for combustion multichannel CFBB is provided, be used to improve boiler efficiency, phenomenons such as the wearing and tearing that solve or produce when alleviating the boiler burning-used biologic mass fuel, burn into dross, dust stratification, stifled ash keep the lime-ash activity, reduce ash content carbon and be beneficial to ash comprehensive utilization.
For reaching above purpose, the technical scheme that the utility model adopted is: it is made up of burner hearth, material circulating system, back-end ductwork, afterbody front end flue and afterbody middle-end flue are arranged side by side, a shared mid-feather, afterbody front end flue entrance is connected in cyclone separator, outlet is connected in afterbody middle-end flue entrance, and afterbody middle-end flue outlet is connected in afterbody rear end flue entrance.
Described afterbody front end flue is furnished with pendant superheater, is furnished with high temperature superheater and low temperature superheater in the afterbody middle-end flue, is furnished with economizer and air preheater in the flue of afterbody rear end.
The cyclone separator import is connected in upper furnace, and outlet links to each other with material returning valve by the blanking standpipe, and material returning valve is connected in burner hearth bottom by refeed line.
The beneficial effects of the utility model are: the efficiency of combustion height, and the CO discharge capacity is few, and unburned carbon in flue dust is low, has alleviated burn into wearing and tearing, dust stratification and the stifled ash of afterbody convection heating surface, has guaranteed that boiler safety moves continuously.
Description of drawings
Accompanying drawing has provided the structural representation of the utility model biological substance for combustion multichannel CFBB.
Wherein, 1-burner hearth, 2-cyclone separator, 3-material returning valve, 4-afterbody front end flue, 5-afterbody middle-end flue, 6-afterbody rear end flue, 7-pendant superheater, 8-high temperature superheater, 9-low temperature superheater, 10-economizer, 11-air preheater
The specific embodiment
Be described further with regard to concrete enforcement of the present utility model below in conjunction with accompanying drawing: fuel burns in burner hearth 1 and forms hot flue gas, hot flue gas is carried recycle stock secretly and is entered in the separator by cyclone separator 2 gas approach through burner hearth 1 outlet, under the centrifugation of separator, most of material particles is separated in the flue gas, enter in the material returning valve 3 through the blanking standpipe, get back to burner hearth through material returning valve again, realized the material circulation of recirculating fluidized bed.
Flow of flue gas is directed downwards in afterbody front end flue 4, and the flow of flue gas direction makes progress in afterbody middle-end flue 5, and flow of flue gas is directed downwards in the flue 6 of afterbody rear end.The pendant superheater of arranging in the afterbody front end flue 47 is used for crust block, to alleviate other convection heating surface bonding of afterbody and stifled ash, be provided with high temperature superheater 8 and low temperature superheater 9 in the afterbody middle-end flue 5, be provided with economizer 10 and air preheater 11 in the afterbody rear end flue 6, above convection superheater adopts the low flue gas flow rate arrangement of coarse pitch to alleviate the wearing and tearing of heating surface, avoids stifled ash.Change the flow direction of flue gas between afterbody front end flue 4 and the afterbody middle-end flue 5, help wearing and tearing and the stifled ash of further deposition to alleviate heating surface of ash, and be provided with dust leg.Simultaneously, by the reasonable distribution of back-end ductwork heating surface, can control the inlet flue gas temperature of high temperature superheater 8 effectively, the corrosion of the face that keeps from heat.The thickness road is arranged and is made flow of flue gas apart from longer, has increased the time of staying of fuel in boiler, has improved efficiency of combustion, has reduced the discharge capacity of CO, has reduced unburned carbon in flue dust, and fuel savings also helps the comprehensive utilization of flying dust.
In force in order better to bring into play the beneficial effects of the utility model, when boiler is 65t/h, the sectional dimension of its burner hearth is 8370mm * 3550mm, and the sectional dimension of afterbody front end flue, afterbody middle-end flue, afterbody rear end flue is respectively 4830mm * 2015mm, 4830mm * 2415mm, 4830mm * 2415mm.When boiler was the 130t/h boiler, the sectional dimension of its burner hearth was 8930mm * 4690mm, and the sectional dimension of afterbody front end flue, afterbody middle-end flue, afterbody rear end flue is respectively 7200mm * 2300mm, 7200mm * 3000mm, 6600mm * 2850mm.
Claims (3)
1. biological substance for combustion multichannel CFBB, it is made up of burner hearth, material circulating system, back-end ductwork, it is characterized in that: afterbody front end flue and afterbody middle-end flue are arranged side by side, a shared mid-feather, afterbody front end flue entrance is connected in cyclone separator, outlet is connected in afterbody middle-end flue entrance, and afterbody middle-end flue outlet is connected in afterbody rear end flue entrance.
2. a kind of biological substance for combustion multichannel CFBB as claimed in claim 1, it is characterized in that: described afterbody front end flue is furnished with pendant superheater, be furnished with high temperature superheater and low temperature superheater in the afterbody middle-end flue, be furnished with economizer and air preheater in the flue of afterbody rear end.
3. a kind of biological substance for combustion multichannel CFBB as claimed in claim 1, it is characterized in that: the cyclone separator import is connected in upper furnace, and outlet links to each other with material returning valve by the blanking standpipe, and material returning valve is connected in burner hearth bottom by refeed line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201929956U CN201344522Y (en) | 2008-11-27 | 2008-11-27 | Combustion-use biomass multi-channel circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201929956U CN201344522Y (en) | 2008-11-27 | 2008-11-27 | Combustion-use biomass multi-channel circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201344522Y true CN201344522Y (en) | 2009-11-11 |
Family
ID=41276104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201929956U Expired - Lifetime CN201344522Y (en) | 2008-11-27 | 2008-11-27 | Combustion-use biomass multi-channel circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN201344522Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881456A (en) * | 2010-07-12 | 2010-11-10 | 山西蓝天环保设备有限公司 | Circulating fluid bed domestic garbage burning electricity generation boiler |
| WO2012075892A1 (en) * | 2010-12-05 | 2012-06-14 | Wang Sen | Gas-solid separator for circulating fluidized bed boiler and boiler containing same |
| CN102913891A (en) * | 2012-10-18 | 2013-02-06 | 清华大学 | Boiler flue structure |
| CN103148479A (en) * | 2013-02-22 | 2013-06-12 | 杭州锅炉集团股份有限公司 | Circulating fluidized bed boiler unit for high efficiency combustion of biomass and recovery of waste heat |
| CN104654289A (en) * | 2015-03-17 | 2015-05-27 | 安徽金鼎锅炉股份有限公司 | Fluidized bed boiler for incinerating straws |
| CN104713106A (en) * | 2015-03-17 | 2015-06-17 | 安徽金鼎锅炉股份有限公司 | Incineration boiler tail flue structure |
| CN107606608A (en) * | 2017-09-30 | 2018-01-19 | 山东琦泉能源科技有限公司 | A kind of biomass high-temperature super-pressure circulating fluidized bed boiler flue ash disposal system |
| CN112377896A (en) * | 2020-11-13 | 2021-02-19 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed boiler for pure combustion of high-sodium potassium fuel and operation method thereof |
-
2008
- 2008-11-27 CN CNU2008201929956U patent/CN201344522Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881456A (en) * | 2010-07-12 | 2010-11-10 | 山西蓝天环保设备有限公司 | Circulating fluid bed domestic garbage burning electricity generation boiler |
| WO2012075892A1 (en) * | 2010-12-05 | 2012-06-14 | Wang Sen | Gas-solid separator for circulating fluidized bed boiler and boiler containing same |
| CN102913891A (en) * | 2012-10-18 | 2013-02-06 | 清华大学 | Boiler flue structure |
| CN103148479A (en) * | 2013-02-22 | 2013-06-12 | 杭州锅炉集团股份有限公司 | Circulating fluidized bed boiler unit for high efficiency combustion of biomass and recovery of waste heat |
| CN104654289A (en) * | 2015-03-17 | 2015-05-27 | 安徽金鼎锅炉股份有限公司 | Fluidized bed boiler for incinerating straws |
| CN104713106A (en) * | 2015-03-17 | 2015-06-17 | 安徽金鼎锅炉股份有限公司 | Incineration boiler tail flue structure |
| CN104654289B (en) * | 2015-03-17 | 2017-07-07 | 安徽金鼎锅炉股份有限公司 | A kind of crop straw burning fluidized-bed combustion boiler |
| CN107606608A (en) * | 2017-09-30 | 2018-01-19 | 山东琦泉能源科技有限公司 | A kind of biomass high-temperature super-pressure circulating fluidized bed boiler flue ash disposal system |
| CN112377896A (en) * | 2020-11-13 | 2021-02-19 | 东方电气集团东方锅炉股份有限公司 | Circulating fluidized bed boiler for pure combustion of high-sodium potassium fuel and operation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091111 |
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| CX01 | Expiry of patent term |