CN209508167U - Biomass air-flue gas gasification couples coal-burning boiler electricity generation system - Google Patents
Biomass air-flue gas gasification couples coal-burning boiler electricity generation system Download PDFInfo
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- CN209508167U CN209508167U CN201920241124.7U CN201920241124U CN209508167U CN 209508167 U CN209508167 U CN 209508167U CN 201920241124 U CN201920241124 U CN 201920241124U CN 209508167 U CN209508167 U CN 209508167U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A kind of biomass air-flue gas gasification coupling coal-burning boiler electricity generation system, belongs to field of renewable energy；Existing biomass effective rate of utilization is lower；System includes that circle fluidized-bed gasification furnace is connected to feeding system, and circle fluidized-bed gasification furnace is connected to pressure fan, and circle fluidized-bed gasification furnace is connected to by pipeline with air-introduced machine, and air-introduced machine is connected to by flue with coal-burning boiler；Circle fluidized-bed gasification furnace is connected to cyclone separator, cyclone separator is connected to cyclone dust collectors by pipeline, cyclone dust collectors are connected to by pipeline with gas heat-exchanger, and gas heat-exchanger is connected to by pipeline with gas burner, and gas burner outlet end is connected to coal-burning boiler；Improve biomass effective rate of utilization.
Description
Technical field
The utility model belongs to field of renewable energy more particularly to a kind of biomass air-flue gas gasification coupling is coal-fired
Boiler power generation system.
Background technique
Biomass energy is used as most potential green regenerative energy sources, advances by leaps and bounds in the development of power field,
It the technical problems such as measures there are burner hearth coking and being difficult in view of the direct combustion power generation of biomass to be difficult to solve, in recent years, passes through heat
Chemical conversion technology is quickly grown using the biological fuel gas generation technology generated after gasification of biomass, at present with " biogas
Change coupling coal unit generation technology " it is mainstream technology route.Coupled mode is converted after gasification furnace gasifies for biomass and is made a living
Substance combustible gas, then by biological fuel gas be delivered to coal-burning boiler carry out combustion power generation, coupled mode is single, degree of coupling compared with
Shallowly.
Gasifying agent for gasification of biomass mainly has oxygen, carbon dioxide, vapor, air.It is invested by gasifying agent
The limitation of cost, the air that macro-organism matter gasification furnace using steady sources and easily obtains at present is as gasifying agent.Biogas
Change is a high temperature anaerobic process, and gasification furnace needs to consume a part of biomass first with air oxidation heat release to provide gasification
Required hot environment leads to the reduction of biomass effective rate of utilization.
Utility model content
The utility model overcomes above-mentioned the deficiencies in the prior art, provides a kind of biomass air-flue gas gasification coupling combustion
Coal burning boiler electricity generation system, the flue gas generated by recycling coal-burning boiler are biomass with air together as biogas agent
Air-flue gas gasification provides stable high temperature anaerobic gas source, improves biomass effective rate of utilization.
The technical solution of the utility model includes:
A kind of biomass air-flue gas gasification coupling coal-burning boiler electricity generation system, including circle fluidized-bed gasification furnace, air-supply
Machine, air-introduced machine, flue, cyclone dust collectors, gas heat-exchanger, gas burner and coal-burning boiler；The recirculating fluidized bed
The feed inlet of gasification furnace is connected to the discharge port of feeding system, the first air inlet and pressure fan of the circle fluidized-bed gasification furnace
Second air inlet of connection, the circle fluidized-bed gasification furnace is connected to by pipeline with air-introduced machine, and the air-introduced machine passes through flue gas
Pipeline is connected to the economizer exit flue of coal-burning boiler；The upper delivery outlet of the circle fluidized-bed gasification furnace and lower input port point
It is not connected to cyclone separator, the delivery outlet of the cyclone separator is connected to the arrival end of cyclone dust collectors by pipeline, described
The outlet end of cyclone dust collectors is connected to by pipeline with the arrival end of gas heat-exchanger, and the outlet end of the gas heat-exchanger passes through
Pipeline is connected to the arrival end of gas burner, the input end of the gas burner outlet end connection coal-burning boiler.
Further, the feeding system includes bedding plant and biomass silo；The discharge port of the bedding plant passes through biography
Defeated band is connected to the feed inlet of biomass silo, and the discharge port of the biomass silo passes through pipeline and circle fluidized-bed gasification furnace
Feed inlet connection.
It further, further include ash cellar, the ash inlet of the ash cellar is connected to by pipeline with the ash hole of cyclone dust collectors.
Further, each road pipeline is provided with valve.
It further, further include flow measurement device and valve group；The flow measurement device and valve group are arranged in recycle stream
Change the pipeline between bed gasification furnace and air-introduced machine, the flow measurement device and valve group are positioned close to circle fluidized-bed gasification furnace
The second air inlet.
The utility model has the advantages that compared with the existing technology
The utility model provides a kind of biomass air-flue gas gasification coupling coal-burning boiler electricity generation system, has following
Advantage:
1, it is added to flue gas gasification agent, realizes air-flue gas gasification of biomass.The high temperature drawn by coal-burning boiler tail portion
The heat that flue gas carries, compensating for biomass gasifying furnace is the heat for maintaining self-operating and consuming the generation of part biological matter, is made
More biomass effectively gasify, and improve biomass effective rate of utilization；
2, flue gas needed for biomass air-flue gas gasification is exported quoted from coal-burning boiler coal economizer, 350 DEG C of flue-gas temperature with
On, and steady sources, it is ideal gasifying agent gas source, meanwhile, coal-burning boiler tail flue gas is quoted as gasification of biomass
Agent is sent into gasification furnace with air as biogas agent together, provides stable high temperature for biomass air-flue gas gasification and detest
Source of oxygen has further deepened the coupling depth of biomass gasification system and coal unit；
3, boiler tail flue gas is efficiently utilized, provides stable gas source for biomass air-flue gas gasification, high-temperature flue gas is made a living
While gasification substance provides partial heat, reduce the demand of air, avoids being mixed into for a large amount of nitrogen, improve biology
Matter gasification efficiency and fuel gases calorific value effectively increase power plant's income so that unit mass biomass fermentation electricity increases.
4, high-temperature flue gas be passed through create gasification of biomass needed for anaerobic environment, in gasifying agent under the ratio of air
Drop, reasonable distribution air and flue gas ratio, realize best gasification result, avoid mixing a large amount of nitrogen and influencing gasification of biomass combustion
Gas quality solves the problems, such as that biomass gasification burning quality is low in coupled system, and is conducive to nitrogen oxides from coal-fired boiler
Control；In addition, the CO carried in flue gas2, vapor be ideal biogas agent, the addition of flue gas will be further
Improve combustion gas quality.
Detailed description of the invention
Fig. 1 is the utility model structure chart.
In figure: 1 circle fluidized-bed gasification furnace, 2 pressure fan, 3 air-introduced machines, 4 flues, 5 cyclone dust collectors, 6 combustion gas are changed
Hot device, 7 gas burners, 8 coal-burning boilers, 9 flow measurement devices, 10 valve groups.
Specific embodiment
The utility model is described in detail below with reference to attached drawing.
A kind of biomass air-flue gas gasification coupling coal-burning boiler electricity generation system, as shown in Figure 1, including recirculating fluidized bed
Gasification furnace 1, pressure fan 2, air-introduced machine 3, flue 4, cyclone dust collectors 5, gas heat-exchanger 6, gas burner 7 and coal-fired pot
Furnace 8；The feed inlet of the circle fluidized-bed gasification furnace 1 is connected to the discharge port of feeding system, the circle fluidized-bed gasification furnace 1
The first air inlet be connected to pressure fan 2, the second air inlet of the circle fluidized-bed gasification furnace 1 passes through pipeline and air-introduced machine 3
Connection, the air-introduced machine 3 are connected to by flue 4 with the economizer exit flue of coal-burning boiler 8；The recirculating fluidized bed gas
The upper delivery outlet and lower input port for changing furnace 1 are connected to cyclone separator respectively, and the delivery outlet of the cyclone separator passes through pipeline
It is connected to the arrival end of cyclone dust collectors 5, the outlet end of the cyclone dust collectors 5 passes through the arrival end of pipeline and gas heat-exchanger 6
The outlet end of connection, the gas heat-exchanger 6 is connected to by pipeline with the arrival end of gas burner 7, the gas burner 7
The input end of outlet end connection coal-burning boiler 8.
Specifically, the feeding system includes bedding plant and biomass silo；The discharge port of the bedding plant passes through transmission
Band is connected to the feed inlet of biomass silo, and the discharge port of the biomass silo passes through pipeline and circle fluidized-bed gasification furnace 1
Feed inlet connection.
Specifically, cyclone dust collectors 5 are for removing a small amount of dust carried in combustion gas.
It specifically, further include ash cellar, the ash inlet of the ash cellar is connected to by pipeline with the ash hole of cyclone dust collectors 5.
Specifically, each road pipeline is provided with valve, including combustion gas emptying combustion pipe is respectively provided with valve, works as circulation
, it can be achieved that biomass gasification system gas burning system and coal unit are isolated after fluidized-bed gasification furnace 1 is stopped transport.
It specifically, further include flow measurement device 9 and valve group 10；The flow measurement device 9 and the setting of valve group 10 are following
Pipeline between ring fluidized-bed gasification furnace 1 and air-introduced machine 3, the flow measurement device 9 and valve group 10 are positioned close to recycle stream
Change the second air inlet of bed gasification furnace 1.
Specifically, flow measurement device 9 and valve group 10 is arranged in gasification air, flue 4, according to different demands, setting
Pressure reducing valve, shut-off valve can adjust the air and flue gas flow for being delivered to circle fluidized-bed gasification furnace 1 by adjusting valve opening,
In the hope of obtaining best biomass gasification burning quality.
Specifically, circle fluidized-bed gasification furnace is one kind of fluidized-bed gasification furnace, is increased on the basis of fluidized-bed gasification furnace
Material circulating system is added, circle fluidized-bed gasification furnace has industrial application for gasification of biomass at present, as Jingmen power plant fires
Coal burning boiler mixes fired biomass combustion gas project, " Datang Chang Mount steam power plant biomass coupled electricity-generation technological transformation demonstrative project ".
Specifically, cyclone separator belongs to a part of circle fluidized-bed gasification furnace, is used for separation of material and combustion gas, separation
The material to get off is regasified in inflow circle fluidized-bed gasification furnace ontology.
Working principle: circle fluidized-bed gasification furnace 1, pressure fan 2, air-introduced machine 3, cyclone dust collectors 5, gas heat-exchanger are opened
6, gas burner 7, coal-burning boiler 8 and feeding system；Biomass is conveyed into circle fluidized-bed gasification furnace 1 by feeding system
Raw material, while air is conveyed to circle fluidized-bed gasification furnace 1 by pressure fan 2, biomass material is in circle fluidized-bed gasification furnace 1
Interior completion air-flue gas gasification generates biological fuel gas；The high-temperature biomass gas for carrying fly ash granule and tar gas successively passes through
Cyclone separator, cyclone dust collectors 5 and gas heat-exchanger 6 are crossed, removes fly ash granule, and reduce high-temperature biomass gas temperature；
8 burner hearth of coal-burning boiler is sprayed into through gas burner 7 and carries out combustion heat release, after burning, generates flue gas in boiler tail；Air-introduced machine 3
Flue gas is drawn from 8 economizer exit of coal-burning boiler by flue 4, is delivered to circle fluidized-bed gasification furnace 1, it is ciculation fluidized
Air-flue gas gasification is completed by air, flue gas and biomass material that pressure fan 2 conveys in bed gasification furnace 1, generates biology
Matter combustion gas；The high-temperature biomass gas for carrying fly ash granule and tar gas successively passes through cyclone separator, cyclone dust collectors 5 and combustion
Gas heat exchanger 6 removes fly ash granule, and reduces high-temperature biomass gas temperature；Pass through the low-temperature biological matter after gas heat-exchanger 6
Combustion gas through pipeline, directly through gas burner 7 spray into 8 burner hearth of coal-burning boiler carry out combustion heat release, quote hot Secondary Air do it is combustion-supporting
Agent；Step d to step f is repeated, until closing circle fluidized-bed gasification furnace 1, pressure fan 2, air-introduced machine 3, cyclone dust collectors 5, combustion
Gas heat exchanger 6, gas burner 7, coal-burning boiler 8 and feeding system；Part long-chain biological contained in high-temperature biomass gas
The Precipitation Temperature of matter gasification tar is lower than 350 DEG C, and biomass coke tar will finally be controlled in the condensation and blocking of heating surface in order to prevent
Biological fuel gas temperature after system cooling is greater than 400 DEG C.
Claims (5)
1. a kind of biomass air-flue gas gasification couples coal-burning boiler electricity generation system, which is characterized in that including recirculating fluidized bed gas
Change furnace (1), pressure fan (2), air-introduced machine (3), flue (4), cyclone dust collectors (5), gas heat-exchanger (6), fuel gas buring
Device (7) and coal-burning boiler (8)；The feed inlet of the circle fluidized-bed gasification furnace (1) is connected to the discharge port of feeding system, described
First air inlet of circle fluidized-bed gasification furnace (1) is connected to pressure fan (2), and the second of the circle fluidized-bed gasification furnace (1)
Air inlet is connected to by pipeline with air-introduced machine (3), and the air-introduced machine (3) passes through province's coal of flue (4) and coal-burning boiler (8)
The connection of device exhaust pass；The upper delivery outlet of the circle fluidized-bed gasification furnace (1) and lower input port connect with cyclone separator respectively
It is logical, arrival end of the delivery outlet of the cyclone separator by pipeline connection cyclone dust collectors (5), the cyclone dust collectors (5)
Outlet end be connected to the arrival end of gas heat-exchanger (6) by pipeline, the outlet end of the gas heat-exchanger (6) passes through pipeline
It is connected to the arrival end of gas burner (7), the input end of gas burner (7) outlet end connection coal-burning boiler (8).
2. a kind of biomass air-flue gas gasification couples coal-burning boiler electricity generation system according to claim 1, feature exists
In the feeding system includes bedding plant and biomass silo；The discharge port of the bedding plant passes through transmission belt and biomass material
The feed inlet in storehouse is connected to, and the discharge port of the biomass silo is connected by pipeline and the feed inlet of circle fluidized-bed gasification furnace (1)
It is logical.
3. a kind of biomass air-flue gas gasification couples coal-burning boiler electricity generation system according to claim 1, feature exists
In further including ash cellar, the ash inlet of the ash cellar is connected to by pipeline with the ash hole of cyclone dust collectors (5).
4. a kind of biomass air-flue gas gasification couples coal-burning boiler electricity generation system according to claim 1, feature exists
In each road pipeline is provided with valve.
5. a kind of biomass air-flue gas gasification couples coal-burning boiler electricity generation system according to claim 1, feature exists
In further including flow measurement device (9) and valve group (10)；The flow measurement device (9) and valve group (10) are arranged in recycle stream
Change the pipeline between bed gasification furnace (1) and air-introduced machine (3), the flow measurement device (9) and valve group (10) are positioned close to follow
Second air inlet of ring fluidized-bed gasification furnace (1).
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| CN201920241124.7U CN209508167U (en) | 2019-02-26 | 2019-02-26 | Biomass air-flue gas gasification couples coal-burning boiler electricity generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109705922A (en) * | 2019-02-26 | 2019-05-03 | 哈尔滨锅炉厂有限责任公司 | The method of biomass air-flue gas gasification coupling coal-burning boiler electricity generation system and raising biological fuel gas quality |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109705922A (en) * | 2019-02-26 | 2019-05-03 | 哈尔滨锅炉厂有限责任公司 | The method of biomass air-flue gas gasification coupling coal-burning boiler electricity generation system and raising biological fuel gas quality |
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