CN102010757A - Method for generating power by gasifying integrated straws in supercritical coal-fired generator set - Google Patents

Method for generating power by gasifying integrated straws in supercritical coal-fired generator set Download PDF

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Publication number
CN102010757A
CN102010757A CN2010105464644A CN201010546464A CN102010757A CN 102010757 A CN102010757 A CN 102010757A CN 2010105464644 A CN2010105464644 A CN 2010105464644A CN 201010546464 A CN201010546464 A CN 201010546464A CN 102010757 A CN102010757 A CN 102010757A
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biomass
boiler
gasifying
hot
flying dust
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CN2010105464644A
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CN102010757B (en
Inventor
阎维平
鲁许鳌
沈冶
袁光福
何培红
黎泽元
胡志波
蒋国平
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GUODIAN CHANGYUAN ELECTRIC POWER CO Ltd
North China Electric Power University
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GUODIAN CHANGYUAN ELECTRIC POWER CO Ltd
North China Electric Power University
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Gasification And Melting Of Waste (AREA)

Abstract

The invention discloses a method for generating power by gasifying integrated straws in a supercritical coal-fired generator set. The method comprises the following steps of: packing and forming biomass straws serving as a gasification raw material of a gasifier of a bubbling fluidized bed, wherein primary wind-heat air surplus in a power station and tail gas fume of a boiler are used as gasifying agents. A biomass gasifier is effectively integrated by simply modifying the conventional supercritical unit to make biomass gasified, combusted and generate power, so that the defect that the biomass is directly blended and combusted is effectively overcome, the influence of biomass ash on fly ash is avoided, and the problem that the conventional auger feeding equipment is easy to damage is solved; therefore, biomass energy can be efficiently utilized and pollutant emission of coal-fired power stations is further reduced.

Description

In overcritical coal fired power generation unit, integrate the gasifying stalk electricity-generating method
Technical field
The invention belongs to the technical field of biomass energy gasification reignition, the combustion gas that relates in particular to generation such as the agricultural crop straw that utilizes rice straw, straw realizes the electricity-generating method that biological fuel gas fires again.
Background technology
The tradition coal power station can produce many atmospheric polluting materials, and nowadays fossil energy such as coal is exhausted day by day, and it is the effective way of alleviating the primary energy source shortage problem that biomass are used to generate electricity.Consider that from technology and cost biomass and coal for mixing combustion technology are still one of main path of biomass utilization at present, but bring new problem, as
(1) biomass powder process difficulty, the fly ash combustible material ratio raises;
(2) biomass ash (the particularly biomass ash of stalk class) influences utilization of coal ash;
(3) the auger feeder equipment is often stuck causes core component to damage when serious.
This makes gasifying biomass fire again---mix combustion technology indirectly and obtain paying attention to, this technology can effectively overcome above shortcoming of directly mixing burning, makes full use of the Infrastructure of existing coal power station, at control CO 2, SO 2And NO XThe discharging aspect has more advantage.Abroad start to walk in this respect early, beginning West Europe part country the eighties has just had the demonstration operation.But used raw material mainly is forestry waste such as wood chip, wood fragments bits, and therefore China indiscriminately imitate this pattern and introduce domestic certain difficulty that has based on agricultural wastes, is necessary suitably to revise.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of suitable China's national situation, particularly in agricultural wastes One's name is legion zone, integrates the biomass straw gasification with the overcritical coal power station in locality and fires electricity-generating method again.
The technical solution adopted in the present invention is as follows:
Adopt a kind of apparatus system of in supercritical unit, integrating the gasifying stalk generating, this device is carried the bulk cargo subsystem by the biomass straw material package, bubbling fluidized bed gasification subsystem, fluidized wind mixing and conveying system, the high-temperature fuel gas delivery system, overcritical pulverized-coal fired boiler constitutes.
Under the condition that guarantees the total blast volume that fluidisation is required, the warm air that attracts from a wind outlet of air preheater is as the main flow wind transmission, and the flue gas that attracts from boiler tail is as the auxiliary flow wind transmission, and both send into vapourizing furnace at mixing;
The stalk material package is broken up through the stalk material package by the belt drying transfer roller and is transported to vapourizing furnace after device is broken up, and finishes gasification reaction.
The blending ratio of described main flow wind transmission and described auxiliary flow wind transmission 5.5: 1 to 6: 1.
Described mixing process use the anticorrosion roots blower of high-temperature flue gas to low pressure boiler smoke evacuation boost, the warm air of itself and relatively high pressure is mixed.
The flue gas that use attracts from boiler tail is as the too high stalk material package of the dry water ratio of siccative.
The hot flying dust of the hot biological fuel gas separating most behind cyclonic separator that produces through gasification reaction, described flying dust is by in the hot auger loopback of the flying dust that is connected with the cyclonic separator vapourizing furnace.
Deliver to boiler furnace by a hot combustion gas suction fan by the high-temperature fuel gas transport pipe through the combustion gas after the flying dust separation and carry out reignition, realize fuel gas buring generating and reductive NO xWorking cycle.
Beneficial effect of the present invention comprises:
(1) biomass straw is packed moulding is convenient to raw material and is deposited fortune, effectively reduces floor space;
(2) adopt the charging of stalk bulk cargo machine, solved the flimsy problem of conventional auger apparatus for feeding;
(3) adopt bubbling fluidized bed as vapourizing furnace, fluidizing velocity is low, effectively reduces the fly ash combustible material ratio;
(4) wind of being had more than needed in the power station promotes biological fuel gas quality and gasification efficiency as the fluidized wind of bubbling fluidization bed gasification furnace, also improves overall boiler energy utilization efficiency simultaneously;
(5) make full use of the useless flue gas that has now in the boiler combustion process,, regulate the oxygen level of fluidisation air quantity on the one hand as vaporized chemical, on the other hand as siccative, dry high-moisture stalk material package, realization is to the waste heat recovery in power station;
(6) avoided of the influence of biomass ash to flyash.
Description of drawings
Below in conjunction with accompanying drawing the present invention is elaborated:
Fig. 1 is a schematic flow sheet of the present invention.
Reference numeral:
1-boiler furnace, the anticorrosion roots blower of 2-high-temperature flue gas, 3-high-temperature fuel gas transport pipe, the hot combustion gas suction fan of 4-, 5-cyclonic separator, the hot auger of 6-flying dust, 7-vapourizing furnace, 8-stalk material package are broken up device, 9-belt drying transfer roller.
Embodiment
The gasifying stalk power generation system of integrating whole coal dust generating set adopts a coal-powder boiler connection to move with the mode of one or more vapourizing furnace, in this example, is to be with a mode, as shown in Figure 1.
The too high situation of moisture content may occur at the biomass material package, the belt drying transfer roller that present embodiment adopts has the exsiccant function concurrently.After the biomass straw material package transported to the scene, break up to get rid of in the vapourizing furnace 7 after device 8 is broken up through the stalk material packages by belt drying transfer roller 9 and gasify.Material package density is about 200kg/m 3, the material package size is by the decision of vapourizing furnace size, and generally be advisable to be no more than 50% of vapourizing furnace bed area in single material package cross section.Quote a part of boiler tail smoke evacuation (about 100 ℃) as siccative, carry out hot flue gas drying in the way, transportation section, the dry exhaust gas volumn of using can be according to wanting the decision of exsiccant amount of moisture.
Aspect vapourizing furnace, a wind with certain pressure head (general 300 ℃) of having more than needed when utilizing the supercritical unit design draws a part as bubbling fluidization bed gasification furnace fluidisation institute required airflow, simultaneously as vaporized chemical, and gasified bio-matter stalk material package.In order to guarantee the stable and high effective operation of bubbling fluidization bed gasification furnace, can draw boiler tail smoke evacuation (about 100 ℃) in the middle of the operation and sneak into the warm air vaporized chemical, blending ratio be 5.5: 1 to 6: thereby 1 reduce the vaporized chemical oxygen level, improve vapourizing furnace outlet combustion gas combustiblecomponents ratio and calorific value.Mixing process uses 2 pairs of low pressure boilers smoke evacuations of the anticorrosion roots blower of high-temperature flue gas to boost, and the warm air of itself and relatively high pressure is mixed.
The combustion gas of drawing from vapourizing furnace 7 is behind cyclonic separator 5, and the middle and upper part reduced zone of directly being sent into boiler furnace 1 by high-temperature fuel gas transport pipe 3 carries out reignition.And the emulsion zone of being sent into bubbling fluidized bed by the hot auger 6 of flying dust by the hot flying dust that cyclonic separator 5 separates burns, and replenishes gasification institute heat requirement, improves efficiency of carbon conversion.The pipe-line transportation crushing of combustion gas is overcome by a hot combustion gas suction fan 4.
The biomass semicoke of discharging both can have been sent into the emulsion zone burning of fluidized-bed with hot flying dust, also can deliver to the waste heat boiler after-flame.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. in overcritical coal fired power generation unit, integrate the gasifying stalk electricity-generating method, it is characterized in that, under the condition that guarantees the total blast volume that fluidisation is required, the warm air that attracts from the outlet of wind of air preheater is as the main flow wind transmission, the flue gas that attracts from boiler tail is as the auxiliary flow wind transmission, and vapourizing furnace (7) is sent in both mixing;
The stalk material package is broken up through the stalk material package by belt drying transfer roller (9) and is transported to vapourizing furnace (7) after device (8) is broken up, and finishes gasification reaction.
2. the method for claim 1 is characterized in that, the blending ratio of described main flow wind transmission and described auxiliary flow wind transmission 5.5: 1 to 6: 1.
3. method as claimed in claim 1 or 2 is characterized in that, described mixing process use the anticorrosion roots blower of high-temperature flue gas (2) to low pressure boiler smoke evacuation boost, the warm air of itself and relatively high pressure is mixed.
4. the method for claim 1 is characterized in that, uses the flue gas that attracts from boiler tail as the too high stalk material package of the dry water ratio of siccative.
5. the method for claim 1, it is characterized in that, the hot flying dust of the hot biological fuel gas separating most behind cyclonic separator (5) that produces through gasification reaction, described flying dust by with the hot auger of flying dust (6) loopback vapourizing furnace (7) that cyclonic separator (5) is connected in.
6. method as claimed in claim 5 is characterized in that, the combustion gas after separating through flying dust is delivered to boiler furnace (1) by a hot combustion gas suction fan (4) by high-temperature fuel gas transport pipe (3) and carried out reignition, realizes fuel gas buring generating and reductive NO xWorking cycle.
CN2010105464644A 2010-11-15 2010-11-15 Method for generating power by gasifying integrated straws in supercritical coal-fired generator set Expired - Fee Related CN102010757B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103881754A (en) * 2014-03-24 2014-06-25 国电长源湖北生物质气化科技有限公司 Efficient biomass gasification and coal-fired power generating boiler combined power generating method
CN104629809A (en) * 2015-01-04 2015-05-20 华中科技大学 System for preparing high-caloric-value biomass gasified gas by using high-temperature flue gas of oxygen-enriched combustion boiler
CN104629808A (en) * 2015-01-16 2015-05-20 华中科技大学 System for producing biomass high-heating-value gasified gases by using low temperature flue gas of oxygen-enriched combustion boiler
CN105889906A (en) * 2016-06-13 2016-08-24 合肥德博生物能源科技有限公司 Thermal-pulverization high-efficiency combustion device and method for high-volatile-component carbon-containing fuel
CN106122944A (en) * 2016-07-25 2016-11-16 杭州燃油锅炉有限公司 A kind of pulverized-coal fired boiler
CN106221816A (en) * 2016-09-19 2016-12-14 北京中电联发科技有限公司 The combustion gas of molding biomass combustion generation and the system and method for coal dust mixed power generation
CN107120639A (en) * 2017-06-29 2017-09-01 南京电力设备质量性能检验中心 A kind of coal-fired boiler combustion operation method and burning runtime
CN107191935A (en) * 2011-04-22 2017-09-22 谐和能源有限责任公司 The method that the fuel of processing and coal are gasified with cofiring altogether
CN107255269A (en) * 2017-06-07 2017-10-17 国电科学技术研究院 Station boiler system and station boiler integrate the method that gasification of biomass afterburning improves afterbody cigarette temperature
CN109966915A (en) * 2019-03-29 2019-07-05 北京国电龙源环保工程有限公司 A kind of gasification of biomass coupling coal-burning boiler full load SCR denitration system and process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158312A (en) * 2007-09-14 2008-04-09 武汉力人投资有限公司 Power generation method using biomass
CN201103916Y (en) * 2007-09-17 2008-08-20 李晓昆 Exhaust-heat pre-heating fuel device for biomass gasified power generation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158312A (en) * 2007-09-14 2008-04-09 武汉力人投资有限公司 Power generation method using biomass
CN201103916Y (en) * 2007-09-17 2008-08-20 李晓昆 Exhaust-heat pre-heating fuel device for biomass gasified power generation

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107191935A (en) * 2011-04-22 2017-09-22 谐和能源有限责任公司 The method that the fuel of processing and coal are gasified with cofiring altogether
CN103881754A (en) * 2014-03-24 2014-06-25 国电长源湖北生物质气化科技有限公司 Efficient biomass gasification and coal-fired power generating boiler combined power generating method
CN103881754B (en) * 2014-03-24 2015-09-09 国电长源湖北生物质气化科技有限公司 The efficient combination electricity-generating method of gasifying biomass and coal-fired electric generation furnace
CN104629809A (en) * 2015-01-04 2015-05-20 华中科技大学 System for preparing high-caloric-value biomass gasified gas by using high-temperature flue gas of oxygen-enriched combustion boiler
CN104629808A (en) * 2015-01-16 2015-05-20 华中科技大学 System for producing biomass high-heating-value gasified gases by using low temperature flue gas of oxygen-enriched combustion boiler
CN105889906A (en) * 2016-06-13 2016-08-24 合肥德博生物能源科技有限公司 Thermal-pulverization high-efficiency combustion device and method for high-volatile-component carbon-containing fuel
CN106122944A (en) * 2016-07-25 2016-11-16 杭州燃油锅炉有限公司 A kind of pulverized-coal fired boiler
CN106221816A (en) * 2016-09-19 2016-12-14 北京中电联发科技有限公司 The combustion gas of molding biomass combustion generation and the system and method for coal dust mixed power generation
CN107255269A (en) * 2017-06-07 2017-10-17 国电科学技术研究院 Station boiler system and station boiler integrate the method that gasification of biomass afterburning improves afterbody cigarette temperature
CN107120639A (en) * 2017-06-29 2017-09-01 南京电力设备质量性能检验中心 A kind of coal-fired boiler combustion operation method and burning runtime
CN109966915A (en) * 2019-03-29 2019-07-05 北京国电龙源环保工程有限公司 A kind of gasification of biomass coupling coal-burning boiler full load SCR denitration system and process

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