CN108571720A - A kind of biomass direct-fired flue gas coupled electricity-generation method and its system - Google Patents

A kind of biomass direct-fired flue gas coupled electricity-generation method and its system Download PDF

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Publication number
CN108571720A
CN108571720A CN201711384641.1A CN201711384641A CN108571720A CN 108571720 A CN108571720 A CN 108571720A CN 201711384641 A CN201711384641 A CN 201711384641A CN 108571720 A CN108571720 A CN 108571720A
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CN
China
Prior art keywords
flue gas
biomass
burning
direct
boiler
Prior art date
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Pending
Application number
CN201711384641.1A
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Chinese (zh)
Inventor
王健
黄晨
沈丛奇
吕晓东
庄劼
武广富
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI ELECTRIC POWER CO Ltd
Shanghai Minghua Electric Power Technology and Engineering Co Ltd
Original Assignee
SHANGHAI ELECTRIC POWER CO Ltd
Shanghai Minghua Electric Power Technology and Engineering Co Ltd
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Filing date
Publication date
Application filed by SHANGHAI ELECTRIC POWER CO Ltd, Shanghai Minghua Electric Power Technology and Engineering Co Ltd filed Critical SHANGHAI ELECTRIC POWER CO Ltd
Priority to CN201711384641.1A priority Critical patent/CN108571720A/en
Publication of CN108571720A publication Critical patent/CN108571720A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/18Combinations of steam boilers with other apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/006Layout of treatment plant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

A kind of biomass direct-fired flue gas coupled electricity-generation method of present invention offer and its system, substance including that will contain biomass is sent into direct-combustion boiler burning and generates flue gas and the flue gas after burning is transported to the boiler furnace of a coal-burning power plant and the flue gas generated with the boiler furnace mix, to utilize coal unit power generation.A kind of biomass direct-fired flue gas coupled electricity-generation method of present invention offer and its system, compared with prior art, the present invention uses common direct-combustion boiler (grate furnace or fluidized-bed combustion boiler) biomass burning, there is no high parameter component, do not arrange or arrange on a small quantity heating surface, manufacturing process is simple, at low cost, disclosure satisfy that higher environmental requirement.The heat that flow, ingredient and temperature by measuring biomass combustion flue gas can be used to measure biomass combustion generation facilitates carry out charge calculation to calculate biomass fermentation electricity.

Description

A kind of biomass direct-fired flue gas coupled electricity-generation method and its system
Technical field
The present invention relates to a kind of electricity-generating method, more particularly to a kind of biomass direct-fired flue gas coupled electricity-generation method and its it is System.
Background technology
Currently, China uses direct combustion power generation technology for a long time using the substance (including waste) containing biomass, due to unit Capacity is small, parameter is low, and the technology generating efficiency is generally all very low, even if biomass power generation is given very high online electricity by country Valence, biomass power plant are still often difficult to realize profit, can not solve stalk field conscientiously and burn the original intention for causing haze.People Using active service large capacity, efficient power station coal unit, biomass coupled electricity-generation is carried out, in this way, can substantially carry The utilization ratio of high biomass energy reduces discharge, while also good economic benefit.Currently, the coupling of biomass and coal electricity Power generation has following several main technical schemes:
First, biomass by power station pulverized coal preparation system enters boiler combustion after directly being mixed with coal.This scheme is at home and abroad There are more units putting into operation, main problem is that the electricity that generating power with biomass combustion generates is difficult to measure, and mixes fired biomass Coal-burning power plant can not enjoy biomass power generation electricity price, constrain the enthusiasm that burning is mixed by domestic power plant.The program is to biomass Bad adaptability, incomplete combustion loss is big, and biomass is directly burnt in station boiler can also bring corruption to boiler water wall Erosion is dangerous.
Second is that gasification of biomass coupled electricity-generation.This scheme is the combustible gas that will be generated after gasification of biomass by gasification furnace Body is sent into coal-burning boiler multifuel combustion, and the program solves the problems, such as biomass metering, also there is ripe application case at home.Which It needs in addition to build biomass gasifying furnace, cost of investment is big, and service requirement is high.In addition, gasification furnace also has the character of biomass Higher requirement, many biomass kinds are difficult to be applied.
Coupling hair is carried out third, generating high temperature and high pressure steam after biomass direct-fired and being incorporated in existing coal-burning power plant's jet chimney Electricity.This scheme needs to build small-sized high parameter biomass direct-combustion boiler to match large-scale power station coal unit, and manufacturing cost is high, Operation is complicated.In addition, being also required to the small-sized biomass Boiler Steam parameter tracking while coal unit peak-frequency regulation of power station It is adjusted, control response speed and regulating power will all become prodigious problem.
Invention content
The present invention provides a kind of biomass direct-fired flue gas coupled electricity-generation method and its systems, by existing efficient power station Biomass direct-combustion boiler (heating surface can not be arranged or be arranged on a small quantity to the boiler) is built by coal unit, after biomass combustion The heat smoke of generation is sent directly into the boiler furnace of coal-burning power plant, is mixed with the flue gas of existing boiler, to using now Some coal units carry out efficiency power generation.Since the flue gas purification system of coal unit is utilized, biomass processes process can Meet higher environmental requirement.
In order to achieve the above-mentioned object of the invention, a kind of biomass direct-fired flue gas coupled electricity-generation method provided by the invention includes:
Substance feeding direct-combustion boiler containing biomass is burnt and generates flue gas;And
The flue gas is transported to the boiler furnace of a coal-burning power plant and the flue gas generated with the boiler mixes, to profit It is generated electricity with the coal unit of coal-burning power plant.
Further, by the flue gas cool-down after the burning;
Further, the cooling is cooled down the flue gas after burning by a heat exchanger.
Further, the cooling makes it be mixed with the flue gas after the burning by introducing extraneous Cryogenic air.
Further, the flue gas conveying is pushed using a wind turbine.
Further, the flue gas conveying uses negative pressure mode.
A kind of biomass direct-fired flue gas coupled electricity-generation system, it includes:
One includes the coal-burning power plant of boiler and master section;
One, which is used for burning, the substance containing biomass and generates the direct-combustion boiler of flue gas;And
By the flue gas after burning by a flue gas delivery pipe road be transported to a coal-burning power plant boiler furnace and with the pot The flue gas conveying device for the flue gas mixing that stove burner hearth generates.
Further comprise the heat sink of the flue gas cool-down after the burning.
Further, the heat sink uses a heat exchanger, is carried out the flue gas after burning by the heat exchanger Cooling.
Further, for the heat sink by using a pipeline, it introduces extraneous Cryogenic air, and with the burning Flue gas afterwards is mixed.
Further, the flue gas conveying device uses a wind turbine.
Further, the flue gas conveying device uses a negative pressure device.
Further, the negative pressure device include one be arranged the direct-combustion boiler and the flue gas delivery pipe road periphery It sealing shell and one is positioned close to the boiler furnace and is communicated so as to described with the sealing shell by exhaust pipe The negative-pressure air fan of negative pressure is formed in sealing shell.
Further, the exhaust pipe include the main exhaust pipe being connected with the direct-combustion boiler and with the flue gas The branch exhaust pipe that transfer pipeline is connected.
Further, one flue gas purification system is set on the flue gas delivery pipe road.
A kind of biomass direct-fired flue gas coupled electricity-generation method and its system provided by the invention, with prior art phase Than the present invention uses common direct-combustion boiler (grate furnace or fluidized-bed combustion boiler) biomass burning, does not have high parameter component, does not arrange Or heating surface is arranged on a small quantity, manufacturing process is simple, at low cost, disclosure satisfy that higher environmental requirement.By measuring biomass fuel Flow, ingredient and the temperature for burning flue gas can be used to measure the heat of biomass combustion generation, to calculate biomass fermentation electricity, side Just charge calculation is carried out.
In addition, a kind of biomass direct-fired flue gas coupled electricity-generation method provided by the invention and its system, by existing height It imitates and builds biomass direct-combustion boiler (heating surface can not be arranged or be arranged on a small quantity to the boiler) by the coal unit of power station, by biomass The heat smoke generated after burning is sent directly into coal-fired plant boiler, to utilize efficient fuel coal unit generation.
In addition, the present invention is strong to biomass undergoes adaptation, the even harmful organisms matter such as domestic waste and sludge also may be used To be handled using the present invention.In particular, compared with the above-mentioned prior art, the present invention does not need biomass direct-combustion boiler and shows There is power station coal unit to synchronize and carry out rate of load condensate and parameter adjustment, contral ripening is simple, and operation is convenient.Moreover, by biology The outlet of upright combusting boiler installs flue gas processing device additional, can eliminate coupled biological matter combustion product gases to station boiler and environment not Profit influences.
Description of the drawings
Fig. 1 is the schematic diagram of the first embodiment of the present invention.
Fig. 2 is the schematic diagram of the second embodiment of the present invention.
Fig. 3 is the schematic diagram of the third embodiment of the present invention.
Specific implementation mode
Technical characterstic, technical solution and the technique effect of the present invention are done below by embodiments herein and retouched in detail It states.
Fig. 1 is the schematic diagram of the first embodiment of the present invention.Referring to Fig. 1, the biomass direct-fired flue gas coupled electricity-generation of the present invention System include boiler furnace 20, for burn the substance containing biomass and generate flue gas direct-combustion boiler 10 and flue gas conveying dress Set 40.In this first embodiment, flue gas conveying device 40 uses suction ventilator 41, it conveys the flue gas after cooling by flue gas Pipeline 70 is transported to the boiler furnace 20 of coal-burning power plant 100, and the flue gas generated with boiler furnace 20 is mixed subsequently into fire coal 100 next power generation link of power plant.The flue gas being finally discharged purified by the original flue gas purification system 21 of boiler of power plant after from Chimney is discharged.Pressure fan 11 is used for helping the air to burn, direct-combustion boiler 10 to form negative pressure state to the conveying of direct-combustion boiler 10.
In the present invention, direct-combustion boiler 10 uses common direct-combustion boiler (grate furnace or fluidized-bed combustion boiler) biomass burning, There is no high parameter component, do not arrange or arrange heating surface on a small quantity, manufacturing process is simple, at low cost.
In addition, the flue-gas temperature being discharged in order to prevent is excessively high, the work of suction ventilator 41 is influenced, the present invention is in flue gas delivery pipe On road 70, heat sink 5 is equipped near direct-combustion boiler 10.In this embodiment, heat sink 5 uses heat exchanger 51. The high-temperature flue gas being discharged from direct-combustion boiler 10 enters heat exchanger 51, and part of it heat is taken away by heat exchanger 51, to The temperature of high-temperature flue gas suitably reduces, so that suction ventilator 41 works normally.Certainly, if suction ventilator 41 can bear higher temperatures Degree, heat sink 5 can also save.
In addition, to be removed into the impurity in the flue gas of boiler furnace 20, in an embodiment of the present invention, flue gas delivery pipe One flue gas purification system 30 is set on road 70.If flue gas impurity is few or the flue gas impurity does not have shadow to coal-fired plant boiler It rings, flue gas purification system 30 can save.
Fig. 2 is the schematic diagram of the second embodiment of the present invention.The difference of the embodiment and first embodiment is heat sink 5 Using pipeline 52, rest part is identical.Pipeline 52 introduces extraneous Cryogenic air, and mixes dress by one with the flue gas after burning 55 (they can be a containers) are set to be mixed, in this way, the high-temperature flue gas that direct-combustion boiler 10 can be discharged for extraneous Cryogenic air Temperature suitably reduces, so that suction ventilator 41 works normally.
Fig. 3 is the schematic diagram of the third embodiment of the present invention.The 3rd embodiment and above-mentioned first embodiment and second are real The main distinction for applying example be using positive pressure mode convey direct-combustion boiler 10 discharge high-temperature flue gas, avoid use to temperature requirement not Suction ventilator 41 that can be too high, in this way, heat sink 5 can be saved.
To prevent the positive pressure mode of movement in Fig. 3 to extraneous leakage contribution environment, system additionally uses a kind of additional bear Pressure device, the negative pressure device include the sealing shell 42 and negative pressure wind being arranged in 70 periphery of direct-combustion boiler 10 and flue gas delivery pipe road Machine 45.Certainly, the sealing shell 42 of 70 periphery of direct-combustion boiler 10 and flue gas delivery pipe road can also separate so that direct-combustion boiler 10 It is respectively provided with independent sealing shell with 70 respective periphery of flue gas delivery pipe road.In this embodiment, due to being also provided with flue gas Purification system 30, certainly, flue gas purification system 30 are also disposed in sealing shell 42.Meanwhile further including a main exhaust pipe 71 The exhaust pipe system formed with branch exhaust pipe 72.Direct-combustion boiler 10 is passed through negative-pressure air fan 45 and boiler by main exhaust pipe 71 Burner hearth 20 is connected to, and several exhaust pipes 72 are connected to by negative-pressure air fan 45 with boiler furnace 20, in this way, negative-pressure air fan 45 makes 10 outside of direct-combustion boiler keeps negative pressure, and the pernicious gases such as any exhaust gas leaked out from direct-combustion boiler 10 are all by negative-pressure air fan 45 Pump to boiler furnace 20.Meanwhile several exhaust pipes 72 are by the space between flue gas delivery pipe road 70 and sealing shell 42 It is connected to negative-pressure air fan 45, then, negative-pressure air fan 45 is so that the space between flue gas delivery pipe road 70 and sealing shell 42 also may be used Negative pressure is kept, in this way, the inside of entire sealing shell 42 keeps certain negative pressure state, in this way, be discharged from direct-combustion boiler 10 Positive-pressure high-temperature flue gas is pushed to boiler furnace 20 by flue gas delivery pipe road 70, moreover, if there is partial fume is defeated from flue gas Send pipeline 70 to leak out, into flue gas delivery pipe road 70 and sealing shell 42 between space then pumped by negative-pressure air fan 45 To boiler furnace 20.It can be seen that the flue gas conveying device 40 due to the present embodiment uses above-mentioned negative pressure device, the flue gas of high temperature It does not need suction ventilator or other wind turbines is pumped, therefore, eliminate heat sink 5.Meanwhile the setting of the negative pressure device allows to It leaks into external any exhaust gas and boiler furnace 20 is all pumped to by negative-pressure air fan 45, to effectively raise whole system Environment-friendly quality has reached significant and unexpected technique effect.
By above description, the technical scheme is that being worked using following manner:
Substance containing biomass is sent into the burning of direct-combustion boiler 10 and generates flue gas;And
Flue gas after burning is transported to the boiler furnace 20 of a coal-burning power plant and the flue gas generated with the boiler mixes, To be generated electricity using existing coal unit.
By above description, a kind of biomass direct-fired flue gas coupled electricity-generation method and its system provided by the invention, with Prior art is compared, and unique distinction is to use common direct-combustion boiler (grate furnace or fluidized-bed combustion boiler) biomass burning, High parameter component is not needed, do not arrange or arranges heating surface on a small quantity, manufacturing process is simple, at low cost.Since coal burning machine is utilized The flue gas purification system of group, biomass processes process disclosure satisfy that higher environmental requirement.By measuring biomass combustion flue gas Flow, ingredient and temperature can be used to measure the heat of biomass combustion generation and facilitate progress to calculate biomass fermentation electricity Charge calculation.
In addition, a kind of biomass direct-fired flue gas coupled electricity-generation method provided by the invention and its system, by existing height It imitates and builds biomass direct-combustion boiler (heating surface can not be arranged or be arranged on a small quantity to the boiler) by the coal unit of power station, by biomass The heat smoke generated after burning is sent directly into coal-fired plant boiler, to utilize efficient fuel coal unit generation.
The technical characterstic of the present invention is as follows:
1) a kind of biomass coupled electricity-generation method, principle are that biomass is sent into direct-combustion boiler burning, the hot cigarette of generation Pneumatic transmission enters coal-fired power station boiler, to carry out coupled electricity-generation using coal fired power plant unit existing equipment;
2) biomass direct-combustion boiler can not arrange heating surface, or a small amount of heating surface of arrangement;
3) heat smoke that biomass direct-combustion boiler generates can install additional at flue gas before entering existing coal-fired power station boiler Device is managed, adverse effect of the coupled biological matter combustion product gases to station boiler and environment is eliminated.
4) on the heat smoke flue for entering coal-fired power station boiler, the measurements such as flue gas flow, ingredient and temperature can be installed Element, the heat for measuring biomass combustion generation facilitate carry out charge calculation to calculate biomass fermentation electricity.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng It is described the invention in detail according to embodiment, it will be understood by those of ordinary skill in the art that, to the technical side of the present invention Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention Right in.

Claims (14)

1. a kind of biomass direct-fired flue gas coupled electricity-generation method, it is characterised in that it includes:
Substance feeding direct-combustion boiler containing biomass is burnt and generates flue gas;And
Flue gas after burning is transported to the boiler furnace of a coal-burning power plant and the flue gas generated with the boiler furnace mixes, from And the coal unit of the coal-burning power plant is utilized to generate electricity.
2. a kind of biomass direct-fired flue gas coupled electricity-generation method as described in claim 1, which is characterized in that further including will be described Flue gas cool-down after burning.
3. a kind of biomass direct-fired flue gas coupled electricity-generation method as claimed in claim 2, which is characterized in that the cooling passes through One heat exchanger cools down the flue gas after burning.
4. a kind of biomass direct-fired flue gas coupled electricity-generation method as claimed in claim 2, which is characterized in that the cooling passes through Introducing extraneous Cryogenic air makes it be mixed with the flue gas after the burning.
5. a kind of biomass direct-fired flue gas coupled electricity-generation method as described in claim 1, which is characterized in that the flue gas conveying It is pushed using a wind turbine.
6. a kind of biomass direct-fired flue gas coupled electricity-generation method as described in claim 1, which is characterized in that the flue gas conveying Using negative pressure mode.
7. a kind of biomass direct-fired flue gas coupled electricity-generation system, which is characterized in that it includes:
One includes the coal-burning power plant of boiler and master section;
One, which is used for burning, the substance containing biomass and generates the direct-combustion boiler of flue gas;And
By the flue gas after burning by a flue gas delivery pipe road be transported to a coal-burning power plant boiler furnace and with the Boiler Furnace The flue gas conveying device for the flue gas mixing that thorax generates.
8. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 7, which is characterized in that further including will be described The heat sink of flue gas cool-down after burning.
9. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 8, which is characterized in that the heat sink Using a heat exchanger, the flue gas after burning is cooled down by the heat exchanger.
10. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 8, which is characterized in that the cooling dress It sets by using a pipeline, it introduces extraneous Cryogenic air, and is mixed with the flue gas after the burning.
11. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 7, which is characterized in that the flue gas is defeated Device is sent to use a wind turbine.
12. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 7, which is characterized in that the flue gas is defeated Device is sent to use a negative pressure device.
13. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 12, which is characterized in that the negative pressure dress Set including one be arranged the direct-combustion boiler and the flue gas delivery pipe road periphery sealing shell, one be positioned close to the pot Stove burner hearth is simultaneously connected by exhaust pipe to form the negative-pressure air fan of negative pressure in the sealing shell with the sealing shell.
14. a kind of biomass direct-fired flue gas coupled electricity-generation system as claimed in claim 7, which is characterized in that in the flue gas A flue gas purification system is arranged in transfer pipeline.
CN201711384641.1A 2017-12-20 2017-12-20 A kind of biomass direct-fired flue gas coupled electricity-generation method and its system Pending CN108571720A (en)

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Application Number Priority Date Filing Date Title
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105546506A (en) * 2015-11-18 2016-05-04 华北电力大学(保定) Parallel mixed combustion system and method
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
CN206429276U (en) * 2017-01-23 2017-08-22 中国电力工程顾问集团东北电力设计院有限公司 A kind of thermal power plant's clean energy resource utilizes system
CN107327322A (en) * 2017-05-19 2017-11-07 国网浙江省电力公司电力科学研究院 A kind of combustion engine coal machine coupled electricity-generation system and its operation method
CN107384479A (en) * 2017-07-11 2017-11-24 华东理工大学 A kind of device and method of fixed-bed gasification furnace and coal-fired electric generation furnace coupled electricity-generation
CN207750970U (en) * 2017-12-20 2018-08-21 上海明华电力技术工程有限公司 A kind of biomass direct-fired flue gas coupled electricity-generation system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105546506A (en) * 2015-11-18 2016-05-04 华北电力大学(保定) Parallel mixed combustion system and method
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
CN206429276U (en) * 2017-01-23 2017-08-22 中国电力工程顾问集团东北电力设计院有限公司 A kind of thermal power plant's clean energy resource utilizes system
CN107327322A (en) * 2017-05-19 2017-11-07 国网浙江省电力公司电力科学研究院 A kind of combustion engine coal machine coupled electricity-generation system and its operation method
CN107384479A (en) * 2017-07-11 2017-11-24 华东理工大学 A kind of device and method of fixed-bed gasification furnace and coal-fired electric generation furnace coupled electricity-generation
CN207750970U (en) * 2017-12-20 2018-08-21 上海明华电力技术工程有限公司 A kind of biomass direct-fired flue gas coupled electricity-generation system

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