CN109659590A - A kind of integral coal gasification solid oxide fuel cell power generating system and method - Google Patents
A kind of integral coal gasification solid oxide fuel cell power generating system and method Download PDFInfo
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- CN109659590A CN109659590A CN201811526188.8A CN201811526188A CN109659590A CN 109659590 A CN109659590 A CN 109659590A CN 201811526188 A CN201811526188 A CN 201811526188A CN 109659590 A CN109659590 A CN 109659590A
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- 239000000446 fuel Substances 0.000 title claims abstract description 75
- 239000007787 solid Substances 0.000 title claims abstract description 59
- 238000002309 gasification Methods 0.000 title claims abstract description 34
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002918 waste heat Substances 0.000 claims abstract description 23
- 230000003197 catalytic effect Effects 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 94
- 239000013618 particulate matter Substances 0.000 claims description 16
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 15
- 229910052753 mercury Inorganic materials 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 238000003786 synthesis reaction Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 230000007717 exclusion Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000003487 electrochemical reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012716 precipitator Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M8/1231—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte with both reactants being gaseous or vaporised
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
- H01M8/04022—Heating by combustion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- 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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
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- Fuel Cell (AREA)
Abstract
本发明提供的一种整体煤气化固体氧化物燃料电池发电系统及方法，包括空分装置、气化炉、高温换热器、除杂装置、固体氧化物燃料电池、催化燃烧器、余热回收器、低温换热器、DC/AC转换器、压缩机、透平和发电机，充分地利用了合成气的热量用来加热高压空气，并最终通过透平做功，充分地利用了系统中的热量。与此同时采用发电效率高的高温固体氧化物燃料电池，从而能够实现煤炭资源的清洁高效利用，发电效率可达50％以上，污染物排放大大降低。
The invention provides an integrated coal gasification solid oxide fuel cell power generation system and method, including an air separation device, a gasifier, a high temperature heat exchanger, an impurity removal device, a solid oxide fuel cell, a catalytic burner, and a waste heat recovery device. , low temperature heat exchangers, DC/AC converters, compressors, turbines and generators, make full use of the heat of the syngas to heat the high-pressure air, and finally work through the turbine, making full use of the heat in the system. At the same time, the high-temperature solid oxide fuel cell with high power generation efficiency can be used to realize the clean and efficient utilization of coal resources, the power generation efficiency can reach more than 50%, and the pollutant emission is greatly reduced.
Description
Technical field
The invention belongs to solid oxide fuel cell technical field more particularly to a kind of integral coal gasification soild oxides
Fuel cell generation and method.
Background technique
Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) has generating efficiency height, disposal of pollutants
Low and fuel tolerance many-sided advantage such as extensively.There is wide application in fields such as power station, military affairs and aerospaces
Prospect.Solid oxide fuel cell is run under 800 DEG C of hot conditions, and the exhaust gas that battery pile generates can be with small gas
Turbine forms combined cycle, further recycles heat, system generating efficiency reaches 50% or more, significantly larger than thermal power plant.
Discharge amount due to having the advantages that noise and pollutant is very low, and solid oxide fuel cell can be placed as distributed generation resource
It nearby powers in office block, hospital etc..
The fuel of solid oxide fuel cell is more flexible, can use synthetic gas, natural gas, hydrogen-rich gas, chemical industry
Factory is carbon containing or the periodic off-gases of hydrogen are as fuel, not high to the interdependency of the fossil fuels such as coal.Solid oxide fuel cell and coal
Gasification technology combines, and constructs integral coal gasification fuel cell (Integrated Gasification Fuel Cell, IGFC)
Electricity generation system not only increases the capacity of fuel cell power generation and efficiency, the clean utilization of coal resources also may be implemented, be 21
Century Clean Coal Power Generating Technologies an important directions.
In existing research, fuel cell system is used as an independent module, fails in view of in whole system
The effective use of heat.Therefore, under conditions of keeping fuel cell power generation efficiency certain, the heat utilization of system is further increased
Efficiency will further increase system effectiveness.
Summary of the invention
The purpose of the present invention is to provide a kind of integral coal gasification solid oxide fuel cell power generating system and method, solutions
The problem of heat in existing coal gasified fuel battery generating system of having determined cannot efficiently use.
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of integral coal gasification solid oxide fuel cell power generating system provided by the invention, including air separation unit, gas
Change furnace, high-temperature heat-exchanging, exclusion device, solid oxide fuel cell, catalytic burner, waste-heat recoverer, cryogenic heat exchanger,
DC/AC converter, compressor, turbine and generator, wherein the oxygen outlet of air separation unit connects the oxygen intake of gasification furnace, gas
The high-temperature gas outlet for changing furnace is connected to the high-temperature gas entrance of high-temperature heat-exchanging, and the high-temperature gas of high-temperature heat-exchanging exports connection
The entrance of exclusion device, the cryogenic gas entrance of the outlet connection waste-heat recoverer of exclusion device, the low temperature gas of waste-heat recoverer
Body outlet connection anode of solid oxide fuel cell entrance；
The cryogenic gas entrance of the outlet connection high-temperature heat-exchanging of compressor, the cryogenic gas of high-temperature heat-exchanging export connection
The cryogenic gas entrance of cryogenic heat exchanger, the cryogenic gas outlet of cryogenic heat exchanger connect the entrance of turbine, the outlet connection of turbine
The second entrance of catalytic burner, meanwhile, turbine is drivingly connected hair compressor；The first entrance of catalytic burner connects solid oxygen
Compound fuel cell anode outlet, the high-temperature gas entrance of the outlet connection cryogenic heat exchanger of catalytic burner, cryogenic heat exchanger
High-temperature gas outlet connection solid oxide fuel cell cathode inlet；
The entrance of the electric energy output end connection DC/AC converter of solid oxide fuel cell, DC/AC transducer outlet connect
AC network or electric appliance.
Preferably, the high-temperature gas entrance of the cathode outlet connection waste-heat recoverer of solid oxide fuel cell, waste heat
The high-temperature gas outlet of recover is exhaust gas.
Preferably, exclusion device includes particulate matter removing device, desulfurizer, mercury removal device and water-gas shift device,
Wherein, the entrance of the high-temperature gas outlet connection particulate matter removing device of high-temperature heat-exchanging, the outlet of particulate matter removing device connects
The entrance of desulfurizer is connect, the entrance of the outlet connection mercury removal device of desulfurizer, the outlet of mercury removal device connects steam
The entrance of converting means, the cryogenic gas entrance of the outlet connection waste-heat recoverer of water-gas shift device.
Preferably, particulate matter removing device uses sack cleaner or electric precipitator.
Preferably, the nitrogen outlet on air separation unit connects nitrogen storage device.
Preferably, turbine is drivingly connected generator.
Preferably, turbine and generator coaxle arrangement.
A kind of integral coal gasification solid oxide fuel cell electricity-generating method is based on a kind of integral coal gasification soild oxide
Fuel cell generation, comprising the following steps:
Coal and oxygen are passed through gasification furnace and generate synthesis gas, and synthesis gas first passes around high-temperature heat-exchanging heat exchange, after temperature reduces
It is passed through exclusion device to clean, then passes through waste-heat recoverer pre-heating fuel gas, be finally passed into solid oxide fuel electricity
The anode in pond；
At the same time, air is pressurized by compressor, is then passed through high-temperature heat-exchanging, cryogenic heat exchanger improves air
Temperature, then air is done work decrease temperature and pressure by turbine, and is further passed into catalytic burner and soild oxide
Unreacted H in fuel cell anode outlet gas2Chemical reaction occurs and releases heat, improves gas temperature, then by low
It is passed through cathode of solid oxide fuel cell chamber after warm heat exchanger cooling, fuel and oxidant are in solid oxide fuel cell
Interior generation electrochemical reaction generates direct current, is converted into alternating current by DC/AC converter；Turbine drives compressor rotation.
Compared with prior art, beneficial effects of the present invention:
A kind of integral coal gasification solid oxide fuel cell power generating system provided by the invention, is sufficiently used synthesis
The heat of gas is used to heat pressure-air, and does work eventually by turbine, the heat being sufficiently used in system.At the same time
Using the high high temperature solid oxide fuel cell of generating efficiency, so as to realize that the clean and effective of coal resources utilizes, hair
Up to 50% or more, pollutant emission substantially reduces electrical efficiency, particulate matter < 4.5mg/Nm3, SO2 < 20mg/Nm3, NOx <
30mg/Nm3、Hg<0.003mg/Nm3。
Detailed description of the invention
Fig. 1 is structural schematic diagram；
Wherein, 1, air separation unit 2, gasification furnace 3, high-temperature heat-exchanging 4, particulate matter removing device 5, desulfurizer 6,
Mercury removal device 7, water-gas shift device 8, solid oxide fuel cell 9, catalytic burner 10, waste-heat recoverer 11,
Cryogenic heat exchanger 12, DC/AC converter 13, compressor 14, turbine 15, generator.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in more detail.
As shown in Figure 1, a kind of integral coal gasification solid oxide fuel cell power generating system provided by the invention, including sky
Separating device 1, gasification furnace 2, high-temperature heat-exchanging 3, particulate matter removing device 4, desulfurizer 5, mercury removal device 6, water-gas shift dress
Set 7, solid oxide fuel cell 8, catalytic burner 9, waste-heat recoverer 10, cryogenic heat exchanger 11, DC/AC converter 12,
Compressor 13, turbine 14 and generator 15, wherein the entrance of air separation unit 1 is passed through air, and the oxygen outlet of air separation unit 1 connects
The oxygen intake of gasification furnace 2, the nitrogen outlet of air separation unit 1 connect nitrogen storage device；Coal, gas is added in the coal entrance of gasification furnace 2
The high-temperature gas outlet for changing furnace 2 is connected to the high-temperature gas entrance of high-temperature heat-exchanging 3, the high-temperature gas outlet of high-temperature heat-exchanging 3
Connect the entrance of particulate matter removing device 4, the entrance of the outlet connection desulfurizer 5 of particulate matter removing device 4, desulfurizer 5
Outlet connection mercury removal device 6 entrance, mercury removal device 6 outlet connection water-gas shift device 7 entrance, water-gas shift
The cryogenic gas entrance of the outlet connection waste-heat recoverer 10 of device 7, the cryogenic gas outlet connection solid of waste-heat recoverer 10
8 anode inlet of oxide fuel cell；
The entrance of compressor 13 is passed through air, and the cryogenic gas entrance of the outlet connection high-temperature heat-exchanging 3 of compressor 13 is high
The cryogenic gas entrance of the cryogenic gas outlet connection cryogenic heat exchanger 11 of warm heat exchanger 3, the cryogenic gas of cryogenic heat exchanger 11
Outlet connects the entrance of turbine 14, the second entrance of the outlet connection catalytic burner 9 of turbine 14；
The first entrance of catalytic burner 9 connects 8 anode export of solid oxide fuel cell, and catalytic burner 9 goes out
The high-temperature gas entrance of mouth connection cryogenic heat exchanger 11, the high-temperature gas outlet connection solid oxide fuel of cryogenic heat exchanger 11
The cathode inlet of battery 8；
The high-temperature gas entrance of the cathode outlet connection waste-heat recoverer 10 of solid oxide fuel cell 8, waste heat recycling
The high-temperature gas outlet of device 10 is exhaust gas, emptying；
The entrance of the electric energy output end connection DC/AC converter 12 of solid oxide fuel cell 8, DC/AC converter 12
Outlet connects AC network or electric appliance；
Turbine 14 is drivingly connected generator 15 and compressor 13, generator 15 and turbine 14 are coaxially connected.
The air separation unit 1 by Deep Cooling Method by air oxygen and nitrogen separate, oxygen is transported to gasification
In furnace 2.
Reaction generates synthesis gas in the gasification furnace 2, and it is H that synthesis gas, which mainly becomes,2、H2O、CO、CO2、CH4、H2S、COS
Deng.
The high-temperature heat-exchanging 3, waste-heat recoverer 10 and cryogenic heat exchanger 11 include high-temperature gas runner and cryogenic gas
Runner, high-temperature gas and cryogenic gas, which are separated by heat exchanger fin and passed through heat exchanger fin, exchanges heat.
The particulate matter removing device 4 uses sack cleaner or electric precipitator, removes the particulate matter in synthesis gas, so that
Mine dust content is less than 200mg/Nm3。
The desulfurizer 5 uses low-temp methanol method or NHD method, so that exit H2S, COS content is less than 1ppm.
The mercury removal device 6 is using the mercury in activated carbon method removing synthesis gas, so that mercury content is lower than in exit gas
0.03mg/Nm3。
The water-gas shift device 7 uses catalyst by the CO and H in synthesis gas2O reaction generates CO2And H2, so that outlet
CO ratio is lower than 0.5% in gas.
The solid oxide fuel cell 8 is made of anode, cathode, solid oxide electrolyte, cathode and anode point
It is not each led into anode and cathode chamber in solid oxide electrolyte two sides, fuel and oxidant, and electrochemistry occurs
Reaction, produces electricl energy and heat, and battery operating temperature at 800 DEG C, realized in series and parallel by multiple battery piles by the scale of battery.
The catalytic burner 9 makes the H in gas by catalyst2With O2Chemical reaction occurs and generates H2O simultaneously discharges heat
Amount.
The compressor 13, turbine 14 and generator 15 are installed on same axis, and turbine 14 is in pressure high temperature hot gas
The lower rotation of impact drives compressor 13 and generator 15 to rotate, and compressor 13 increases so that the pressure of air is increased to by normal pressure
1Mpa or more, generator 15 then produce electricl energy.
The operation principle of the present invention is that: coal and oxygen are passed through gasification furnace 2 and generate synthesis gas, and the temperature of synthesis gas is 900 DEG C,
Group is divided into CO > 40%, H2> 30%, CO223%.Synthesis gas first pass around high-temperature heat-exchanging 3 heat exchange, temperature be reduced to 100 DEG C with
Under, electrical dust collector device 4 is then passed to, so that particulate matter component is lower than 200mg/Nm3；It is passed through desulfurizer 5 again, so that H2S and
COS concentration is lower than 1ppm；It is passed through mercury removal device 6 again, mercury content in gas is made to be lower than 0.3mg/Nm3, then become by steam
Changing device 7 converts synthesis gas to H2And CO2, so that CO ratio is lower than 0.5%, then pass through 10 pre-heating fuel of waste-heat recoverer
Gas is finally passed into the anode of solid oxide fuel cell (SOFC) 8 to 300 DEG C or more, and at the same time, air passes through compression
Machine 13 increases to 5Mpa from normal pressure, be then passed through high-temperature heat-exchanging 3, cryogenic heat exchanger 11 improve air temperature to 800 DEG C or more,
Then air is done work decrease temperature and pressure by turbine 14, and is further passed into catalytic burner 9 and solid oxide fuel
Unreacted H in 8 anode outlet gases of battery (SOFC)2Occur chemical reaction release heat, improve gas temperature to 900 DEG C with
On, 8 cathode chamber of solid oxide fuel cell (SOFC), fuel and oxidation are passed through after then cooling down by cryogenic heat exchanger 11
Electrochemical reaction occurs in solid oxide fuel cell (SOFC) 8 for agent, direct current is generated, by 12 turns of DC/AC converter
Turn to alternating current.
Claims (8)
1. a kind of integral coal gasification solid oxide fuel cell power generating system, which is characterized in that including air separation unit (1), gas
Change furnace (2), high-temperature heat-exchanging (3), exclusion device, solid oxide fuel cell (8), catalytic burner (9), waste-heat recoverer
(10), cryogenic heat exchanger (11), DC/AC converter (12), compressor (13), turbine (14) and generator (15), wherein space division
The oxygen outlet of device (1) connects the oxygen intake of gasification furnace (2), and the high-temperature gas outlet of gasification furnace 2 is connected to high-temperature heat-exchanging 3
High-temperature gas entrance, high-temperature heat-exchanging 3 high-temperature gas outlet connection exclusion device entrance, exclusion device outlet connection
The cryogenic gas entrance of waste-heat recoverer (10), the cryogenic gas outlet connection solid oxide fuel electricity of waste-heat recoverer (10)
Pond (8) anode inlet；
The cryogenic gas entrance of outlet connection high-temperature heat-exchanging (3) of compressor (13), the cryogenic gas of high-temperature heat-exchanging (3) go out
The cryogenic gas outlet of the cryogenic gas entrance of mouth connection cryogenic heat exchanger (11), cryogenic heat exchanger (11) meets entering for turbine (14)
Mouthful, the second entrance of outlet connection catalytic burner (9) of turbine (14), meanwhile, turbine (14) is drivingly connected hair compressor
(13)；The first entrance of catalytic burner (9) connects solid oxide fuel cell (8) anode export, catalytic burner (9)
The high-temperature gas entrance of outlet connection cryogenic heat exchanger (11), the high-temperature gas outlet connection solid oxidation of cryogenic heat exchanger (11)
The cathode inlet of object fuel cell (8)；
The entrance of electric energy output end connection DC/AC converter (12) of solid oxide fuel cell (8), DC/AC converter
(12) outlet connects AC network or electric appliance.
2. a kind of integral coal gasification solid oxide fuel cell power generating system according to claim 1, which is characterized in that
The high-temperature gas entrance of cathode outlet connection waste-heat recoverer (10) of solid oxide fuel cell (8), waste-heat recoverer
(10) high-temperature gas outlet is exhaust gas.
3. a kind of integral coal gasification solid oxide fuel cell power generating system according to claim 1, which is characterized in that
Exclusion device includes particulate matter removing device (4), desulfurizer (5), mercury removal device (6) and water-gas shift device (7),
In, the entrance of high-temperature gas outlet connection particulate matter removing device (4) of high-temperature heat-exchanging (3), particulate matter removing device (4)
The entrance of outlet connection desulfurizer (5), the entrance of outlet connection mercury removal device (6) of desulfurizer (5), mercury removal device
(6) entrance of outlet connection water-gas shift device (7), outlet connection waste-heat recoverer (10) of water-gas shift device (7)
Cryogenic gas entrance.
4. a kind of integral coal gasification solid oxide fuel cell power generating system according to claim 3, which is characterized in that
Particulate matter removing device (4) uses sack cleaner or electric precipitator.
5. a kind of integral coal gasification solid oxide fuel cell power generating system according to claim 1, which is characterized in that
Nitrogen outlet on air separation unit (1) connects nitrogen storage device.
6. a kind of integral coal gasification solid oxide fuel cell power generating system according to claim 1, which is characterized in that
Turbine (14) is drivingly connected generator (15).
7. a kind of integral coal gasification solid oxide fuel cell power generating system according to claim 1, which is characterized in that
Turbine (14) and generator (15) are coaxially arranged.
8. a kind of integral coal gasification solid oxide fuel cell electricity-generating method, which is characterized in that based on described in claim 1
A kind of integral coal gasification solid oxide fuel cell power generating system, comprising the following steps:
Coal and oxygen are passed through gasification furnace (2) and generate synthesis gas, and synthesis gas first passes around high-temperature heat-exchanging (3) heat exchange, and temperature reduces
After be passed through exclusion device and clean, then pass through waste-heat recoverer (10) pre-heating fuel gas, be finally passed into soild oxide
The anode of fuel cell (8)；
At the same time, air is pressurized by compressor (13), is then passed through high-temperature heat-exchanging (3), cryogenic heat exchanger (11)
The temperature of air is improved, then air is by turbine (14) acting decrease temperature and pressure, and is further passed into catalytic burner (9)
In with unreacted H in solid oxide fuel cell (8) anode outlet gases2Chemical reaction occurs and releases heat, improves gas
Temperature is passed through solid oxide fuel cell (8) cathode chamber, fuel and oxygen after then cooling down by cryogenic heat exchanger (11)
Electrochemical reaction occurs in solid oxide fuel cell (8) for agent, generates direct current, turns by DC/AC converter (12)
Turn to alternating current；Turbine (14) drives compressor (13) rotation.
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| CN113583712A (en) * | 2021-07-12 | 2021-11-02 | 浙江大学 | Multi-energy coupling complementary and sequential conversion system and method |
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