CN210367563U - Integrated coal gasification fuel cell power generation system adopting coal water slurry gasification - Google Patents
Integrated coal gasification fuel cell power generation system adopting coal water slurry gasification Download PDFInfo
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- CN210367563U CN210367563U CN201921089947.9U CN201921089947U CN210367563U CN 210367563 U CN210367563 U CN 210367563U CN 201921089947 U CN201921089947 U CN 201921089947U CN 210367563 U CN210367563 U CN 210367563U
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- 238000002309 gasification Methods 0.000 title claims abstract description 61
- 239000003245 coal Substances 0.000 title claims abstract description 58
- 239000000446 fuel Substances 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000010248 power generation Methods 0.000 title claims abstract description 29
- 239000002002 slurry Substances 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 126
- 239000002918 waste heat Substances 0.000 claims abstract description 71
- 238000011084 recovery Methods 0.000 claims abstract description 35
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000003250 coal slurry Substances 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 29
- 230000023556 desulfurization Effects 0.000 claims description 29
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- 230000015572 biosynthetic process Effects 0.000 claims description 28
- 238000003786 synthesis reaction Methods 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 24
- 239000001301 oxygen Substances 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 claims description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- 239000001569 carbon dioxide Substances 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 230000007062 hydrolysis Effects 0.000 claims description 10
- 238000006460 hydrolysis reaction Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 229910052799 carbon Inorganic materials 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
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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
- 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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Abstract
The utility model provides an adopt coal slurry gasification's whole coal gasification fuel cell power generation system, including coal preparation unit, gasifier, exhaust-heat boiler, dust removal unit, first gas heater, desulphurization unit, ejector, fuel cell, pure oxygen combustor, gas turbine, cathode air compressor, first waste heat recovery heat exchanger, cathode regenerator, air turbine, steam turbine, exhaust-heat boiler and cryrogenic air separation unit; the utility model adopts the coal water slurry gasified integral coal gasification fuel cell power generation system, the hydrogen-carbon ratio entering the fuel cell is moderate, the CO water vapor shift reaction unit is not needed to be arranged to adjust the hydrogen-carbon ratio, or the hydrogen-carbon ratio is adjusted through tail gas recirculation, and the coal water slurry gasification system is simple, so that the whole IGFC system flow is simple; meanwhile, the integrated coal gasification fuel cell power generation system adopting coal water slurry gasification avoids energy loss caused by a water-vapor conversion process due to the fact that the water-vapor conversion process is omitted, and the net power generation efficiency of the IGFC system is improved.
Description
Technical Field
The utility model belongs to the technical field of clean coal power generation, concretely relates to adopt coal slurry gasification's whole coal gasification fuel cell power generation system.
Background
Coal is the most important basic energy in China. In the prior art, the supercritical coal-fired power generating unit and the integrated gasification combined cycle unit IGCC hardly reach a lower carbon emission index. Carbon capture using existing or recently available technologies will not only increase equipment investment significantly, but will also significantly reduce power generation efficiency.
The integrated coal gasification fuel cell power generation system IGFC is a power generation system combining a coal gasification power generation technology and a high-temperature fuel cell, the energy conversion efficiency is not limited by Carnot cycle efficiency, the coal power efficiency can be greatly improved, near zero emission of pollutants and carbon dioxide is easy to realize, and the integrated coal gasification fuel cell power generation system IGFC is an important development direction of a clean coal power generation technology. The IGFC system process flow needs to be optimized according to the actual application condition so as to determine the optimized flow with high efficiency, simple flow and low investment.
The high-temperature fuel cell is the core equipment of IGFC system, and is used for H in fuel gas2And the CO content has stricter requirements. The high-temperature fuel cell fuel gas generated by the dry pulverized coal gasification technology is high in CO content generally, a water-vapor conversion unit needs to be additionally arranged, the system is complex, energy loss caused by the water-vapor conversion process is large, and the improvement of the net power generation efficiency of the IGFC system is influenced.
Disclosure of Invention
An object of the utility model is to provide an adopt coal slurry gasification's whole coal gasification fuel cell power generation system, it is higher to have solved CO content in the high temperature fuel cell fuel gas that current IGFC system exists, needs additionally to dispose the steam shift unit, leads to the system complicated, and the energy loss that the steam shift process brought is great.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides an adopt coal slurry gasification's whole coal gasification fuel cell power generation system, including the unit of preparing coal, the gasifier, waste heat boiler, the dust removal unit, first gas heater, desulphurization unit, the ejector, fuel cell, the pure oxygen combustor, gas turbine, the cathode air compressor, second waste heat recovery heat exchanger, the negative pole regenerator, air turbine, the steam turbine, exhaust-heat boiler and cryrogenic air separation unit, wherein, be provided with raw coal entry and water inlet on the unit of preparing coal, the coal slurry exit linkage gasifier's of the unit of preparing coal entry, the entry of waste heat boiler is connected to the high temperature synthetic gas coarse synthesis export of gasifier, waste heat boiler's entry is connected to waste heat boiler's saturated steam;
the raw synthesis gas outlet of the waste heat boiler is connected with the inlet of the dust removal unit, the gas outlet of the dust removal unit is connected with the hot side inlet of the first gas heater, the hot side gas outlet of the first gas heater is connected with the inlet of the desulfurization device, and the outlet of the desulfurization device is connected with the cold side inlet of the first gas heater;
a cold side outlet of the first gas heater and a medium-pressure steam outlet of the steam turbine are both connected to an inlet of a mixing pipe, an outlet of the mixing pipe is connected with an inlet of an ejector, and partial tail gas at an anode outlet of the fuel cell is ejected;
the synthetic gas outlet of the ejector is connected with the anode inlet of the fuel cell; an anode tail gas outlet of the fuel cell is connected with an outlet of the pure oxygen combustor; an oxygen inlet of the pure oxygen combustor is connected with an oxygen outlet of the air separation unit;
the tail gas outlet of the pure oxygen combustor is connected with the inlet of a gas turbine, and the tail gas outlet of the gas turbine is connected with the inlet of a waste heat boiler;
the cathode air compressor is provided with an air inlet, an air outlet of the cathode air compressor is connected with a cold side inlet of the cathode heat regenerator, a cold side outlet of the cathode heat regenerator is connected with a cathode inlet of the fuel cell, a cathode outlet of the fuel cell is connected with a hot side inlet of the cathode heat regenerator, a hot side outlet of the cathode heat regenerator is connected with an inlet of the air turbine, and a tail gas outlet of the air turbine is connected with an inlet of the waste heat boiler;
the other path of outlet of the cathode air compressor is connected with the inlet of a second waste heat recovery heat exchanger, and the outlet of the second waste heat recovery heat exchanger is connected with the inlet of the cryogenic air unit; the other path of oxygen outlet of the cryogenic air unit is connected with the oxygen inlet of the gasification furnace;
the high-pressure superheated steam of the waste heat boiler is connected with the inlet of the steam turbine.
Preferably, the desulphurization device comprises a water washing tower, a second gas heater, a carbonyl sulfide hydrolysis reactor, a low-temperature waste heat recovery unit, a synthesis gas cooler, a desulphurization unit and a humidifier, the inlet of the first gas heater is connected with the inlet of the water washing tower, the synthetic gas outlet of the water washing tower is connected with the hot side inlet of the second gas heater, the hot side outlet of the second gas heater is connected with the inlet of the carbonyl sulfide hydrolysis reactor, the outlet of the carbonyl sulfide hydrolysis reactor is connected with the cold side inlet of the second gas heater, the cold side outlet of the second gas heater is connected with the inlet of the low-temperature waste heat recovery unit, the outlet of the low-temperature waste heat recovery unit is connected with the inlet of the synthetic gas cooler, the outlet of the synthetic gas cooler is connected with the inlet of the desulfurization unit, the clean synthetic gas outlet of the desulfurization unit is connected with the inlet of the humidifier, and the outlet of the humidifier is connected with the cold side inlet of the first gas heater.
Preferably, a fine desulfurization unit is arranged between the clean synthesis gas outlet of the desulfurization unit and the inlet of the humidifier.
Preferably, a wastewater outlet arranged at the bottom of the desulfurization unit is connected with the water treatment unit; and a waste gas outlet arranged at the bottom of the desulfurization unit is connected with a sulfur recovery unit.
Preferably, the bottom of the waste heat boiler is provided with an air outlet.
Preferably, a tail gas outlet is formed in the bottom of the waste heat boiler, the tail gas outlet is connected with an inlet of the first waste heat recovery heat exchanger, an outlet of the first waste heat recovery heat exchanger is connected with an inlet of the carbon dioxide multistage compressor, and a liquid carbon dioxide outlet is formed in the carbon dioxide multistage compressor.
Preferably, an argon separation device is arranged in the cryogenic air unit, and a waste nitrogen outlet and a pure argon product outlet are arranged on the argon separation device.
Preferably, an oxygen compressor is arranged between the oxygen outlet of the cryogenic air unit and the oxygen inlet of the oxy-fuel burner.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an adopt coal slurry gasification's whole coal gasification fuel cell power generation system, the hydrogen-carbon ratio that gets into fuel cell is moderate, need not to set up CO steam shift reaction unit and adjust the hydrogen-carbon ratio, perhaps through tail gas recirculation adjustment hydrogen-carbon ratio, and coal slurry gasification system is simple, causes whole IGFC system flow simple; meanwhile, the integrated coal gasification fuel cell power generation system adopting coal water slurry gasification avoids energy loss caused by a water-vapor conversion process due to the fact that the water-vapor conversion process is omitted, and the net power generation efficiency of the IGFC system is improved.
Drawings
Fig. 1 is a schematic structural diagram of the power generation system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides an integrated coal gasification fuel cell power generation system adopting coal water slurry gasification, which comprises a coal preparation unit 1, a gasification furnace 2, a waste heat boiler 3, a dust removal unit 4, a first gas heater 5, a water scrubber 6, a second gas heater 7, a carbonyl sulfide hydrolysis reactor 8, a low temperature waste heat recovery unit 9, a synthesis gas cooler 10, a desulfurization unit 11, a fine desulfurization unit 12, a humidifier 13, a water treatment unit 14, a sulfur recovery unit 15, an ejector 16, a fuel cell 17, a pure oxygen combustor 18, a gas turbine 19, a cathode compressor 20, a second waste heat recovery heat exchanger 21, a cathode regenerator 22, an air turbine 23, a steam turbine 24, a waste heat boiler 25, a first waste heat recovery heat exchanger 26, a carbon dioxide multistage compressor 27, a deep cooling air separation unit 28 and an oxygen compressor 29, wherein the coal water slurry outlet of the coal preparation unit 1 is connected with the inlet of the gasification furnace 2, the outlet of the high-temperature crude synthesis gas of the gasification furnace 2 is connected with the inlet of the waste heat boiler 3, and the saturated steam of the waste heat boiler 3 is connected with the inlet of the waste heat boiler 25; a crude synthesis gas outlet of the waste heat boiler 3 is connected with an inlet of a dust removal unit 4, a gas outlet of the dust removal unit 4 is connected with a hot side inlet of a first gas heater 5, a hot side gas outlet of the first gas heater 5 is connected with an inlet of a water washing tower 6, a synthesis gas outlet of the water washing tower 6 is connected with a hot side inlet of a second gas heater 7, a hot side outlet of the second gas heater 7 is connected with an inlet of a carbonyl sulfide hydrolysis reactor 8, an outlet of the carbonyl sulfide hydrolysis reactor 8 is connected with a cold side inlet of the second gas heater 7, a cold side outlet of the second gas heater 7 is connected with an inlet of a low-temperature waste heat recovery unit 9, an outlet of the low-temperature waste heat recovery unit 9 is connected with an inlet of a synthesis gas cooler 10, an outlet of the synthesis gas cooler 10 is connected with an inlet of a desulfurization unit 11, and a clean synthesis gas outlet of the desulfurization, the outlet of the fine desulfurization unit 12 is connected with the inlet of a humidifier 13, and the outlet of the humidifier 13 is connected with the cold side inlet of the first air heater 5;
a wastewater outlet arranged at the bottom of the desulfurization unit 11 is connected with a water treatment unit 14; the waste gas outlet arranged at the bottom of the desulfurization unit 11 is connected with a sulfur recovery unit 15.
The outlet of the cold side of the first gas heater 5 and the medium pressure steam outlet arranged in the middle of the steam turbine 24 are both connected to the inlet of the mixing pipe, the outlet of the mixing pipe is connected to the inlet of the ejector 16, and part of tail gas at the anode outlet of the fuel cell 17 is ejected.
The synthetic gas outlet of the ejector 16 is connected with the inlet of the fuel cell 17; the tail gas outlet of the fuel cell 17 is connected with the inlet of the pure oxygen combustion 18; the oxygen inlet of the pure oxygen burner 18 is connected to the oxygen outlet of the oxygen compressor 29.
The tail gas outlet of the pure oxygen combustor 18 is connected with the inlet of a gas turbine 19, and the tail gas outlet of the gas turbine 19 is connected with the inlet of a waste heat boiler 25; an outlet of the waste heat boiler 25 is connected with an inlet of the first waste heat recovery heat exchanger 26, an outlet of the first waste heat recovery heat exchanger 26 is connected with an inlet of the carbon dioxide multistage compressor 27, and the carbon dioxide multistage compressor 27 is provided with a liquid carbon dioxide outlet.
The cathode air compressor 20 is provided with an air inlet, an air outlet of the cathode air compressor 20 is connected with a cold side inlet of the cathode heat regenerator 22, a cold side outlet of the cathode heat regenerator 22 is connected with a cathode inlet of the fuel cell 17, a cathode outlet of the fuel cell 17 is connected with a hot side inlet of the cathode heat regenerator 22, a hot side outlet of the cathode heat regenerator 22 is connected with an inlet of the air turbine 23, a tail gas outlet of the air turbine 23 is connected with an inlet of the waste heat boiler 25, and the waste heat boiler 25 is provided with an air outlet.
The other path of outlet of the cathode air compressor 20 is connected with the inlet of the second waste heat recovery heat exchanger 21, the outlet of the second waste heat recovery heat exchanger 21 is connected with the inlet of the cryogenic air unit 28, an argon gas separation device is arranged in the cryogenic air unit 28, and a waste nitrogen outlet and a pure argon product outlet are arranged on the cryogenic air unit 28; the oxygen outlet of the cryogenic air unit 28 is connected to the inlet of an oxygen compressor 29.
The high-pressure superheated steam of the waste heat boiler 25 is connected to the inlet of the steam turbine 24.
The utility model discloses a theory of operation:
coal slurry is formed after raw coal and water are ground and slurried in the coal preparation unit 1 and is sent to the gasification furnace 2, the coal slurry and part of pure oxygen sent into the gasification furnace 2 from the outlet of the oxygen compressor 29 are subjected to gasification reaction, furnace slag is generated at the bottom of the gasification furnace 2, and the generated high-temperature crude synthesis gas is sent to the waste heat boiler 3; saturated steam generated by the waste heat boiler 3 is sent into a waste heat boiler 25 for further heating, crude synthesis gas after waste heat recovery by the waste heat boiler 3 is sent into a dust removal unit 4, enters a hot side inlet of a first gas heater 5 after temperature reduction and dust removal, is sent into a water washing tower 6 after temperature reduction, synthesis gas at an outlet of the water washing tower 6 is sent into a hot side inlet of a second gas heater 7, is sent into a carbonyl sulfide hydrolysis reactor 8 after further temperature reduction, then enters a cold side inlet of the second gas heater 7, enters a low-temperature waste heat recovery unit 9 after reheating, then enters a synthesis gas cooler 10, is sent into a desulfurization unit 11 after the temperature required by the desulfurization process is reduced, clean synthesis gas generated by the desulfurization unit passes through a fine desulfurization unit 12, is sent into a humidifier 13 for humidification, then enters a cold side of the first gas heater 5, wastewater and waste gas generated by the desulfurization unit 11 respectively enter a water treatment unit 14 and a sulfur recovery unit 15, respectively forming solid salt and sulfur; mixing the synthesis gas at the outlet of the cold side of the first gas heater 5 with the medium-pressure steam extracted from the middle part of the steam turbine 24, diluting the carbon monoxide gas in the synthesis gas, sending the diluted synthesis gas into the ejector 16, ejecting part of tail gas at the outlet of the anode of the fuel cell 17, and allowing the synthesis gas at the outlet of the ejector 16 to enter the anode of the fuel cell 17 for reaction; the rest tail gas at the outlet of the anode of the fuel cell 17 enters a pure oxygen combustor 18 to perform catalytic combustion reaction with part of pure oxygen at the outlet of an oxygen compressor 29 to generate combustion tail gas, the main components of the combustion tail gas are water vapor and carbon dioxide, the combustion tail gas is sent to a waste heat boiler 25 after being acted by a gas turbine 19, the combustion tail gas is sent to a first waste heat recovery heat exchanger 26 after being cooled, and the combustion tail gas is sent to a carbon dioxide multistage compressor 27 after being condensed, cooled and dehydrated to finally form high-purity liquid carbon dioxide.
One air flow is pressurized by a cathode air compressor 20, and then a part of the air flow is sent to a cold side inlet of a cathode heat regenerator 22, high-temperature air at a cold side outlet is sent to a cathode inlet of a fuel cell 17, the high-temperature air is sent to a hot side inlet of the cathode heat regenerator 22 after reaction in the fuel cell 17, the high-temperature air is sent to an air turbine 23 after cooling, the air turbine 23 is driven to rotate to apply work, then the high-temperature air is sent to a waste heat boiler 25, and the waste heat is.
And the other part of air at the outlet of the cathode air compressor 20 is sent to a second waste heat recovery heat exchanger 21 and then sent to a cryogenic air separation unit 28, an argon separation process is arranged in the cryogenic air separation unit 28, waste nitrogen generated by the cryogenic air separation unit 28 is discharged into the atmosphere, and the generated pure argon can be used as a product to generate high-purity oxygen and then sent to the inlet of an oxygen compressor 29.
The waste heat boiler 25 recovers the heat recovered by the exhaust gas discharged from the gas turbine 19 and the air turbine 23, and superheats the saturated steam generated by the waste heat boiler 3, and the waste heat boiler 25 generates high-pressure superheated steam and feeds the high-pressure superheated steam to the steam turbine 24.
The electrical energy generated by the system is generated by a fuel cell 17, a gas turbine 19, an air turbine 23, and a steam turbine 24.
The utility model discloses owing to take above system configuration scheme, have following advantage:
1. the utility model provides an adopt coal slurry gasification's whole coal gasification fuel cell power generation system, the hydrogen-carbon ratio that gets into fuel cell is moderate, need not to set up CO steam shift reaction unit adjustment hydrogen-carbon ratio, perhaps passes through tail gas recirculation adjustment hydrogen-carbon ratio to coal slurry gasification system is simple, causes whole IGFC system flow simple.
2. The utility model provides an adopt coal slurry gasification's whole coal gasification fuel cell power generation system owing to saved the steam transform process, has avoided the energy loss that the steam transform process brought, has improved the net power generation efficiency of IGFC system.
3. The utility model provides an adopt coal slurry gasification's whole coal gasification fuel cell power generation system, because the system is simple, the reliability is high, and equipment cost is low, has improved system economy.
Claims (8)
1. An integrated coal gasification fuel cell power generation system adopting coal water slurry gasification is characterized by comprising a coal preparation unit (1), a gasification furnace (2), a waste heat boiler (3), a dust removal unit (4), a first gas heater (5), a desulfurization device, an ejector (16), a fuel cell (17), a pure oxygen combustor (18), a gas turbine (19), a cathode air compressor (20), a second waste heat recovery heat exchanger (21), a cathode heat regenerator (22), an air turbine (23), a steam turbine (24), a waste heat boiler (25) and a cryogenic air separation unit (28), wherein, a raw coal inlet and a water inlet are arranged on the coal preparation unit (1), a coal water slurry outlet of the coal preparation unit (1) is connected with an inlet of the gasification furnace (2), a high-temperature crude synthesis gas outlet of the gasification furnace (2) is connected with an inlet of the waste heat boiler (3), and saturated steam of the waste heat boiler (3) is connected with an inlet of the waste heat boiler (25);
a crude synthesis gas outlet of the waste heat boiler (3) is connected with an inlet of a dust removal unit (4), a gas outlet of the dust removal unit (4) is connected with a hot side inlet of a first gas heater (5), a hot side gas outlet of the first gas heater (5) is connected with an inlet of a desulfurization device, and the outlet of the desulfurization device is connected with a cold side inlet of the first gas heater (5);
a cold side outlet of the first gas heater (5) and a medium pressure steam outlet of the steam turbine (24) are connected to an inlet of a mixing pipe, an outlet of the mixing pipe is connected with an inlet of an ejector (16), and partial tail gas at an anode outlet of the fuel cell (17) is ejected;
the synthetic gas outlet of the ejector (16) is connected with the anode inlet of the fuel cell (17); an anode tail gas outlet of the fuel cell (17) is connected with an outlet of the pure oxygen combustor (18); the oxygen inlet of the pure oxygen burner (18) is connected with the oxygen outlet of the air separation unit (28);
a tail gas outlet of the pure oxygen combustor (18) is connected with an inlet of a gas turbine (19), and a tail gas outlet of the gas turbine (19) is connected with an inlet of a waste heat boiler (25);
the air inlet is formed in the cathode air compressor (20), the air outlet of the cathode air compressor (20) is connected with the cold side inlet of the cathode regenerator (22), the cold side outlet of the cathode regenerator (22) is connected with the cathode inlet of the fuel cell (17), the cathode outlet of the fuel cell (17) is connected with the hot side inlet of the cathode regenerator (22), the hot side outlet of the cathode regenerator (22) is connected with the inlet of the air turbine (23), and the tail gas outlet of the air turbine (23) is connected with the inlet of the waste heat boiler (25);
the other path of outlet of the cathode air compressor (20) is connected with the inlet of a second waste heat recovery heat exchanger (21), and the outlet of the second waste heat recovery heat exchanger (21) is connected with the inlet of a cryogenic air unit (28); the other path of oxygen outlet of the cryogenic air unit (28) is connected with the oxygen inlet of the gasification furnace (2);
the high-pressure superheated steam of the waste heat boiler (25) is connected with the inlet of the steam turbine (24).
2. The system for generating power by using the integrated coal gasification fuel cell gasified by the coal water slurry according to claim 1, wherein the desulphurization device comprises a water washing tower (6), a second gas heater (7), a carbonyl sulfide hydrolysis reactor (8), a low-temperature waste heat recovery unit (9), a synthesis gas cooler (10), a desulphurization unit (11) and a humidifier (13), wherein a hot side gas outlet of the first gas heater (5) is connected with an inlet of the water washing tower (6), a synthesis gas outlet of the water washing tower (6) is connected with a hot side inlet of the second gas heater (7), a hot side outlet of the second gas heater (7) is connected with an inlet of the carbonyl sulfide hydrolysis reactor (8), an outlet of the carbonyl sulfide hydrolysis reactor (8) is connected with a cold side inlet of the second gas heater (7), a cold side outlet of the second gas heater (7) is connected with an inlet of the low-temperature waste heat recovery unit (9), the outlet of the low-temperature waste heat recovery unit (9) is connected with the inlet of the synthesis gas cooler (10), the outlet of the synthesis gas cooler (10) is connected with the inlet of the desulfurization unit (11), the clean synthesis gas outlet of the desulfurization unit (11) is connected with the inlet of the humidifier (13), and the outlet of the humidifier (13) is connected with the cold side inlet of the first gas heater (5).
3. The system for generating electric power by using an integrated coal gasification fuel cell with coal water slurry gasification as claimed in claim 2, wherein a fine desulfurization unit (12) is arranged between the clean synthesis gas outlet of the desulfurization unit (11) and the inlet of the humidifier (13).
4. The system for generating electric power by using an integrated coal gasification fuel cell using coal water slurry gasification according to claim 2, wherein a wastewater outlet provided at the bottom of the desulfurization unit (11) is connected to the water treatment unit (14); a waste gas outlet arranged at the bottom of the desulfurization unit (11) is connected with a sulfur recovery unit (15).
5. The system for power generation of an integrated coal gasification fuel cell using coal-water slurry gasification according to claim 1, wherein the bottom of the exhaust-heat boiler (25) is provided with an air outlet.
6. The system for generating power by using the integrated coal gasification fuel cell gasified by the coal water slurry as claimed in claim 1 or 5, wherein the bottom of the waste heat boiler (25) is provided with a tail gas outlet, the tail gas outlet is connected with an inlet of the first waste heat recovery heat exchanger (26), an outlet of the first waste heat recovery heat exchanger (26) is connected with an inlet of the carbon dioxide multistage compressor (27), and the carbon dioxide multistage compressor (27) is provided with a liquid carbon dioxide outlet.
7. The system for generating electric power by using an integrated coal gasification fuel cell using coal water slurry gasification according to claim 1, wherein an argon separation device is provided in the cryogenic air unit (28), and a waste nitrogen outlet and a pure argon product outlet are provided on the argon separation device.
8. The system for power generation of an integrated coal gasification fuel cell using water-coal-slurry gasification according to claim 1 or 7, characterized in that an oxygen compressor (29) is provided between the oxygen outlet of the cryogenic air unit (28) and the oxygen inlet of the pure oxygen burner (18).
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| CN110257106A (en) * | 2019-07-11 | 2019-09-20 | 中国华能集团清洁能源技术研究院有限公司 | A kind of integral coal gasification fuel cell generation and method using coal water slurry gasification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110257106A (en) * | 2019-07-11 | 2019-09-20 | 中国华能集团清洁能源技术研究院有限公司 | A kind of integral coal gasification fuel cell generation and method using coal water slurry gasification |
| CN110257106B (en) * | 2019-07-11 | 2024-02-27 | 中国华能集团清洁能源技术研究院有限公司 | Integrated coal gasification fuel cell power generation system and method adopting coal water slurry gasification |
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