CN109181776B - Coal-based poly-generation system and method for integrated fuel cell power generation - Google Patents
Coal-based poly-generation system and method for integrated fuel cell power generation Download PDFInfo
- Publication number
- CN109181776B CN109181776B CN201811361277.1A CN201811361277A CN109181776B CN 109181776 B CN109181776 B CN 109181776B CN 201811361277 A CN201811361277 A CN 201811361277A CN 109181776 B CN109181776 B CN 109181776B
- Authority
- CN
- China
- Prior art keywords
- outlet
- inlet
- gas
- unit
- fuel cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 66
- 239000003245 coal Substances 0.000 title claims abstract description 45
- 238000010248 power generation Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 229
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 109
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 102
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000002918 waste heat Substances 0.000 claims abstract description 59
- 238000002309 gasification Methods 0.000 claims abstract description 30
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000010926 purge Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 14
- 230000023556 desulfurization Effects 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical compound [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000002817 coal dust Substances 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 238000007084 catalytic combustion reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- BXGYYDRIMBPOMN-UHFFFAOYSA-N 2-(hydroxymethoxy)ethoxymethanol Chemical compound OCOCCOCO BXGYYDRIMBPOMN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- 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
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
-
- 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
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
- C10J2300/0936—Coal fines for producing producer gas
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1615—Stripping
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
- C10J2300/1643—Conversion of synthesis gas to energy
- C10J2300/1646—Conversion of synthesis gas to energy integrated with a fuel cell
-
- 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
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
- C10J2300/1656—Conversion of synthesis gas to chemicals
- C10J2300/1665—Conversion of synthesis gas to chemicals to alcohols, e.g. methanol or ethanol
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Fuel Cell (AREA)
Abstract
The invention providesThe integrated fuel cell power generation coal-based poly-generation system and method comprises a coal preparation unit, a gasification furnace, a synthesis gas cooler, a first circulating gas compressor, a first gas heater, a desulfurization treatment unit, a methanol synthesis unit, a cooling unit, a separator, an ejector, a fuel cell, a cathode air compressor, a cathode regenerator, a waste heat boiler, a steam turbine and a pure oxygen combustor; the fuel cell of the system utilizes the H2-rich purge gas in the chemical synthesis process as fuel to improve the energy utilization efficiency of the whole system, ensure the reliability of equipment, and simultaneously meet the requirement of deep peak regulation of the electric power of the coal-based power generation system to trap part of CO 2 Can greatly reduce CO in the coal-based power generation process 2 Emission intensity.
Description
Technical Field
The invention belongs to the technical field of clean coal power generation, and particularly relates to a fuel cell power generation and coal-based poly-generation system and method.
Background
The coal-based poly-generation system is used for producing across industries and departments by utilizing the main component of the synthesis gas generated from single coal gasification equipment, namely CO+H2, so as to obtain various chemical products with high added value, liquid fuel methanol, F-T synthetic fuel, dimethanol, city gas, hydrogen, heat for technological processes, power generation and the like.
However, in the synthesis process of producing chemical products and liquid fuel by using synthesis gas, a large amount of purge gas is generated. Purge gas is gas which does not participate in reaction in chemical production or gas which is accumulated in chemical equipment or pipelines because of the fact that the grade is too low and cannot be utilized. Since purge gas affects the heat transfer effect of the apparatus, affects the reaction speed and progress, reduces the production efficiency, etc., the purge gas must be periodically discharged. Purge gas is not necessarily completely useless, and various energy and materials should be fully utilized as much as possible in order to reduce production cost. One way of using this is to compress or heat it to continue its recycle, and the other way is to use its available components directly in another process, such as combustion.
For the methanol synthesis process, the purge gas contains H2 gas with higher purity, and the purge gas is recycled after compression and pressurization, so that the compression power consumption can be greatly increased, and the synthesis efficiency of the synthesis unit is reduced. This portion of the purge gas is typically burned in a boiler or in a hydrogen-rich gas turbine. However, the method has two problems, on one hand, because of the high H2 content of the purge gas, the requirements on the boiler and the gas turbine equipment are high; on the other hand, the energy utilization efficiency of the purge gas after direct combustion is lower.
Disclosure of Invention
The invention aims to provide a coal-based poly-generation system and method for generating electricity by an integrated fuel cell, which solve the problem of low utilization efficiency of the existing purge gas.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a coal-based poly-generation system for integrated fuel cell power generation, which comprises a coal preparation unit, a gasification furnace, a synthesis gas cooler, a first circulating gas compressor, a first gas heater, a desulfurization treatment unit, a methanol synthesis unit, a cooling unit, a separator, an ejector, a fuel cell, a cathode air compressor, a cathode regenerator, a waste heat boiler, a steam turbine and a pure oxygen combustor, wherein a dry coal powder outlet of the coal preparation unit is connected with an inlet of the gasification furnace, a high-temperature crude synthesis gas outlet at the top of the gasification furnace and an outlet of the first circulating compressor are both connected with an inlet of the synthesis gas cooler, and a synthesis gas outlet of the synthesis gas cooler is divided into two paths, one path is connected with an inlet of the first circulating compressor; the other path of the gas is connected with a hot side inlet of a first gas heater, a hot side outlet of the first gas heater is connected with an inlet of a methanol synthesis unit through a desulfurization treatment unit, an outlet of the methanol synthesis unit is connected with an inlet of a separator through a cooling unit, a purge gas outlet at the top of the separator is connected with a cold side inlet of the first gas heater, a cold side outlet of the first gas heater is connected with an inlet of an ejector, an outlet of the ejector is connected with an anode inlet of a fuel cell, an anode outlet of the fuel cell is connected with an inlet of a pure oxygen burner, a tail gas outlet of the pure oxygen burner is connected with an inlet of a waste heat boiler, and an exhaust port is arranged on the waste heat boiler;
the outlet of the cathode air compressor is connected with the cold side inlet of the cathode heat regenerator, the cold side outlet of the cathode heat regenerator is connected with the cathode inlet of the fuel cell, the cathode outlet of the fuel cell is connected with the hot side inlet of the cathode heat regenerator, and the hot side outlet of the cathode heat regenerator is connected with the inlet of the waste heat boiler;
the saturated steam outlet of the synthesis gas cooler is connected with the inlet of the waste heat boiler, the superheated steam outlet of the waste heat boiler is connected with the inlet of the steam turbine, and the medium-pressure steam outlet of the steam turbine is connected with the inlet of the gasification furnace.
Preferably, the coarse synthesis gas outlet of the synthesis gas cooler is connected with a dust removal unit, the outlet of the dust removal unit is divided into two paths, one path is connected with the inlet of the first circulating gas compressor, and the other path is connected with the inlet of the first gas heater.
Preferably, the desulfurization treatment unit comprises a water scrubber, a second gas heater, a sulfur-tolerant water vapor shift reactor, a low-temperature waste heat recovery unit, a second synthesis gas cooler and a sulfur-carbon co-stripping unit, wherein the hot side outlet of the first gas heater is connected with the inlet of the water scrubber, the outlet of the water scrubber 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 sulfur-tolerant water vapor shift reactor, the outlet of the sulfur-tolerant water vapor shift reactor 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 low-temperature waste heat recovery unit, the outlet of the low-temperature waste heat recovery unit is connected with the inlet of the second synthesis gas cooler, the outlet of the second synthesis gas cooler is connected with the inlet of the sulfur-carbon co-stripping unit, and the clean synthesis gas outlet of the sulfur-carbon co-stripping unit is connected with the inlet of the methanol synthesis unit.
Preferably, the sulfur-carbon CO-stripping unit is provided with an exhaust gas outlet, and the exhaust gas outlet is connected with CO 2 A compression and liquefaction unit and a sulfur recovery unit.
Preferably, a second circulating gas compressor and a third gas heater are arranged between the outlet of the desulfurization treatment unit and the inlet of the methanol synthesis unit, wherein the outlet of the desulfurization treatment unit is connected with the inlet of the second circulating gas compressor, and the outlet of the second circulating gas compressor is connected with the inlet of the methanol synthesis unit through the cold end of the third gas heater.
Preferably, the cooling unit comprises a waste heat boiler and a third synthesis gas cooler, wherein an outlet of the methanol synthesis unit is connected with a hot side inlet of the third gas heater, a hot side outlet of the third gas heater is connected with an inlet of the waste heat boiler, an outlet of the waste heat boiler is connected with an inlet of the third synthesis gas cooler, and an outlet of the third synthesis gas cooler is connected with an inlet of the separator.
Preferably, the bottom outlet of the separator is connected with a rectifying tower, the bottom of the rectifying tower is provided with a methanol product outlet, and the top of the rectifying tower is provided with an acid gas outlet.
Preferably, the system further comprises a cryogenic air separation unit, an oxygen compressor and a nitrogen compressor, wherein an oxygen outlet of the cryogenic air separation unit is connected with an inlet of the oxygen compressor, and a nitrogen outlet is connected with an inlet of the nitrogen compressor; the outlet of the oxygen compressor is divided into two paths, one path is connected with the oxygen inlet of the gasifier, and the other path is connected with the inlet of the pure oxygen burner; the outlet of the nitrogen compressor is connected with the inlet of the gasification furnace.
A coal-based poly-generation method for integrated fuel cell power generation is based on a coal-based poly-generation system for integrated fuel cell power generation, and comprises the following steps:
grinding raw coal in a coal preparation unit, drying to form dry coal dust, conveying the dry coal dust to a gasification furnace by high-pressure nitrogen, simultaneously conveying pure oxygen and medium-pressure steam extracted from the middle part of a small amount of steam turbines to the gasification furnace for reaction, mixing and chilling high-temperature crude synthesis gas generated at the top of the gasification furnace with low-temperature synthesis gas at the outlet of a first circulating gas compressor, and conveying the mixture to a synthesis gas cooler; part of the synthesis gas after waste heat recovery through the synthesis gas cooler is circulated to the inlet of the first circulating gas compressor, the other part of the synthesis gas enters the hot side inlet of the first gas heater, after being cooled, the synthesis gas is sent to the desulfurization treatment unit for treatment, the generated clean synthesis gas is sent to the methanol synthesis unit for synthesis reaction, after the synthesis reaction, the clean synthesis gas is sent to the cooling unit for cooling, then the product gas at the outlet of the cooling unit is sent to the separator, purge gas at the outlet of the top of the separator enters the cold side inlet of the first gas heater, and then is sent to the ejector, part of tail gas at the outlet of the anode of the fuel cell is ejected, and the synthesis gas at the outlet of the ejector enters the anode of the fuel cell for reaction and outputs electric power;
the rest tail gas at the anode outlet of the fuel cell enters a pure oxygen burner to carry out catalytic combustion reaction with pure oxygen to generate combustion tail gas, and the combustion tail gas is sent into a waste heat boiler to be discharged into the atmosphere after waste heat is recovered;
one air is pressurized by a cathode air compressor and then is sent to a cold side inlet of a cathode heat regenerator, high-temperature air at a cold side outlet is sent to a cathode inlet of a fuel cell, after reaction is carried out in the fuel cell, the air is sent to a hot side inlet of the cathode heat regenerator, after temperature reduction, the air is sent to a waste heat boiler, and after waste heat is recovered, the air is discharged to the atmosphere;
saturated steam generated by the synthesis gas cooler is sent into a waste heat boiler for further heating, and superheated steam generated by the waste heat boiler is sent into a steam turbine for power generation.
Compared with the prior art, the invention has the beneficial effects that:
the coal-based poly-generation system for integrated fuel cell power generation provided by the invention has the advantages that the fuel cell utilizes the H2-rich purge gas in the chemical synthesis process as fuel, so that the energy utilization efficiency of the whole system is improved, the equipment reliability can be ensured, the flexible and adjustable power generation combined with the fuel cell is provided, the power generation load depth change caused by the load change of the poly-generation system can be adapted, and meanwhile, the requirement of the power depth peak regulation of the coal-based power generation system is met, and part of CO is trapped 2 Can greatly reduce CO in the coal-based power generation process 2 Emission intensity.
The coal-based poly-generation method for integrated fuel cell power generation provided by the invention has the advantages that the fuel cell utilizes the H2-rich purge gas in the chemical synthesis process as fuel, so that the energy utilization efficiency of the whole system is improved, the equipment reliability can be ensured, the flexible and adjustable power generation combined with the fuel cell is provided, and the method can be suitable for the load change of the poly-generation systemThe depth of the power generation load changes, and meanwhile, the requirements of the coal-based power generation system on deep power peak regulation are met, so that part of CO is trapped 2 Can greatly reduce CO in the coal-based power generation process 2 Emission intensity.
Drawings
FIG. 1 is a schematic diagram of a power generation system in accordance with the present invention;
wherein, 1, a coal preparation unit 2, a gasification furnace 3, a first synthesis gas cooler 4, a dust removal unit 5, a first circulating gas compressor 6, a first gas heater 7, a water scrubber 8, a second gas heater 9, a sulfur-tolerant water-vapor shift reactor 10, a low-temperature waste heat recovery unit 11, a second synthesis gas cooler 12, a sulfur-carbon CO-stripping unit 13 and CO 2 The system comprises a compression and liquefaction unit 14, a sulfur recovery unit 15, a second recycle gas compressor 16, a third gas heater 17, a methanol synthesis unit 18, a waste heat boiler 19, a third synthesis gas cooler 20, a separator 21, a rectifying tower 22, an ejector 23, a fuel cell 24, a pure oxygen combustor 25, a cathode air compressor 26, a cathode regenerator 27, a waste heat boiler 28, a steam turbine 29, a cryogenic air separation unit 30, an oxygen compressor 31 and a nitrogen compressor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the coal-based poly-generation system for integrated fuel cell power generation provided by the invention comprises a coal preparation unit 1, a gasification furnace 2, a first synthesis gas cooler 3, a dust removal unit 4, a first circulating gas compressor 5, a first gas heater 6, a water scrubber 7, a second gas heater 8, a sulfur-tolerant water-vapor shift reactor 9, a low-temperature waste heat recovery unit 10, a second synthesis gas cooler 11, a sulfur-carbon CO-stripping unit 12 and CO 2 The device comprises a compression and liquefaction unit 13, a sulfur recovery unit 14, a second circulating gas compressor 15, a third gas heater 16, a methanol synthesis unit 17, a waste heat boiler 18, a third synthesis gas cooler 19, a separator 20, a rectifying tower 21, an ejector 22, a fuel cell 23, a pure oxygen burner 24, a cathode air compressor 25, a cathode regenerator 26, a waste heat boiler 27, a steam turbine 28, a cryogenic air separation unit 29, an oxygen compressor 30 and a nitrogen compressor 31, wherein a dry coal dust outlet of the coal preparation unit 1 is connected with an inlet of a gasification furnace 2The bottom of the gasification furnace 2 is provided with a slag outlet, a high-temperature crude synthesis gas outlet at the top of the gasification furnace 2 is connected with the inlet of the first synthesis gas cooler 3, and a saturated steam outlet of the first synthesis gas cooler 3 is connected with the inlet of the waste heat boiler 23; the crude synthesis gas outlet of the first synthesis gas cooler 3 is connected with the inlet of the dust removal unit 4, the outlet of the dust removal unit 4 is divided into two paths, one path is connected with the inlet of the first circulating gas compressor 5, and the outlet of the first circulating gas compressor 5 is connected with the inlet of the first synthesis gas cooler 3; the other path is connected with a hot side inlet of a first gas heater 6, a hot side outlet of the first gas heater 6 is connected with a cold side inlet of a second gas heater 8 through a water scrubber 7, a cold side outlet of the second gas heater 8 is connected with the hot side inlet of the second gas heater 8 through a sulfur-tolerant water-vapor shift reactor 9, the hot side outlet of the second gas heater 8 is connected with an inlet of a second synthesis gas cooler 11 through a low-temperature waste heat recovery unit 10, an outlet of the second synthesis gas cooler 11 is connected with an inlet of a sulfur-carbon co-removal unit 12, a clean synthesis gas outlet of the sulfur-carbon co-removal unit 12 is connected with an inlet of a second recycle gas compressor 15 pair, an outlet of the second recycle gas compressor 15 is connected with a cold side inlet of a third gas heater 16, a cold side outlet of the third gas heater 16 is connected with the hot side inlet of the third gas heater 16 through a methanol synthesis unit 17, and a hot side outlet of the third gas heater 16 is connected with an inlet of a third synthesis gas cooler 19 through a boiler 18;
CO on sulfur carbon CO-stripping unit 12 2 Outlet connection CO 2 A compression and liquefaction unit 13, a sulfur outlet is connected with a sulfur recovery unit 14;
the product outlet of the third synthesis gas cooler 19 is connected with the inlet of the separator 20, the bottom of the separator 20 is provided with a liquid methanol outlet, the liquid methanol outlet is connected with the inlet of the rectifying tower 21, the bottom of the rectifying tower 21 is provided with a methanol product outlet, and the top of the rectifying tower 21 is provided with an acid gas outlet;
the top purge gas outlet of the separator 20 is connected with the cold side inlet of the first gas heater 6, the cold side outlet of the first gas heater 6 is connected with the inlet of the ejector 22, part of tail gas of the anode outlet of the fuel cell 23 is ejected, and the synthesis gas outlet of the ejector 22 is connected with the anode inlet of the fuel cell 23;
the anode outlet of the fuel cell 23 is connected with the inlet of the pure oxygen burner 24, the combustion tail gas outlet of the pure oxygen burner 24 is connected with the inlet of the preheating boiler 27, and the waste heat boiler 27 is provided with an air exhaust port;
an outlet of the cathode air compressor 25 is connected with a cold side inlet of the cathode regenerator 26, a cold side outlet of the cathode regenerator 26 is connected with a cathode inlet of the fuel cell 23, a cathode outlet of the fuel cell 23 is connected with a hot side inlet of the cathode regenerator 26, and a hot side outlet of the cathode regenerator 26 is connected with an inlet of the waste heat boiler 27;
the oxygen outlet of the cryogenic air separation unit 29 is connected with the inlet of the oxygen compressor 30, and the nitrogen outlet is connected with the inlet of the nitrogen compressor 31; the outlet of the oxygen compressor 30 is divided into two paths, one path is connected with the oxygen inlet of the gasification furnace 2, and the other path is connected with the inlet of the pure oxygen burner 24; the outlet of the nitrogen compressor 31 is connected to the inlet of the gasification furnace 2.
The superheated steam outlet of the waste heat boiler 27 is connected with the inlet of the steam turbine 28, and the steam outlet of the middle part of the steam turbine 28 is connected with the inlet of the gasification furnace 2.
The system flow is as follows:
grinding coal in a coal preparation unit 1, drying to form dry coal dust, conveying high-pressure nitrogen at an outlet of a nitrogen compressor 31 to a gasification furnace 2, conveying part of pure oxygen at an outlet of an oxygen compressor 30 and medium-pressure steam extracted from the middle part of a small amount of steam turbine 28 to the gasification furnace 2 for reaction, generating slag at the bottom of the gasification furnace 2, mixing and chilling high-temperature crude synthesis gas generated at the top with low-temperature synthesis gas at an outlet of a first circulating gas compressor 5, and conveying the mixture to a synthesis gas cooler 3; the saturated steam generated by the synthesis gas cooler 3 is sent to the waste heat boiler 27 for further heating, the crude synthesis gas after waste heat recovery by the waste heat boiler is sent to the dust removal unit 4, part of the synthesis gas after cooling and dust removal is circulated to the inlet of the first circulating gas compressor 5, and the other part of the synthesis gas enters the hot side inlet of the first gas heater 6 and is sent to the water scrubber 7 after cooling.
The synthetic gas at the outlet of the water scrubber 7 is sent to the cold side inlet of the second gas heater 8, and is sent to the sulfur-tolerant water-vapor shift reactor 9 after being heated, and then is sent to the hot side inlet of the second gas heater 8, and the synthetic gas is cooledThen, the synthetic gas enters a low-temperature waste heat recovery unit 10 and then enters a second synthetic gas cooler 11, the synthetic gas is reduced to the temperature required by the desulfurization and decarbonization process, then enters a sulfur-carbon co-stripping unit 12, clean synthetic gas generated by the sulfur-carbon co-stripping unit 12 is sent to a cold side inlet of a third gas heater 16 after being pressurized by a second circulating gas compressor 15, is sent to a methanol synthesis unit 17 after being heated, is sent to a hot side inlet of the third gas heater 16 after being subjected to synthesis reaction, then enters a waste heat passing boiler 18, and then enters a third synthetic gas cooler 19. The waste gas removed by the sulfur-carbon CO-stripping unit 12 respectively enters CO 2 A compression and liquefaction unit 13 and a sulfur recovery unit 14 for respectively forming liquid CO 2 And sulfur products. The product gas at the outlet of the third synthesis gas cooler 19 is sent to a separator 20, the liquid methanol at the outlet at the bottom of the separator 20 is sent to a rectifying tower 21, the outlet at the bottom of the rectifying tower 21 is methanol product, and the outlet at the top of the rectifying tower 21 is acid gas.
The purge gas at the top outlet of the separator 20 enters the cold side inlet of the first gas heater 6, then enters the ejector 22, and ejects part of tail gas at the anode outlet of the fuel cell 23, and the synthesis gas at the outlet of the ejector 22 enters the anode of the fuel cell 23 to react and output power.
The rest tail gas of the anode outlet of the fuel cell 23 enters the pure oxygen burner 24 to carry out catalytic combustion reaction with part of pure oxygen at the outlet of the oxygen compressor 30 to generate combustion tail gas, the main components of the combustion tail gas are water vapor and carbon dioxide, and the combustion tail gas is sent into the waste heat boiler 27 to be discharged into the atmosphere after waste heat is recovered.
One air is pressurized by a cathode air compressor 25 and then is sent to a cold side inlet of a cathode heat regenerator 26, high-temperature air at a cold side outlet is sent to a cathode inlet of a fuel cell 23, after reaction in the fuel cell 23, is sent to a hot side inlet of the cathode heat regenerator 26, is sent to a waste heat boiler 27 after being cooled, and is discharged into the atmosphere after waste heat is recovered.
One air is sent to the cryogenic air separation unit 29, the polluted nitrogen generated by the cryogenic air separation unit 29 is discharged into the atmosphere, high-purity oxygen is generated and sent to the inlet of the oxygen compressor 30, and high-purity nitrogen is generated and sent to the nitrogen compressor 31.
The power generated by the system is generated by a fuel cell 23 and a steam turbine 28, and the product is packagedContains methanol, sulfur and liquid CO 2 。
Claims (9)
1. The utility model provides a coal-based poly-generation system integrating fuel cell power generation, which is characterized in that the system comprises a coal preparation unit (1), a gasification furnace (2), a synthesis gas cooler (3), a first circulating gas compressor (5), a first gas heater (6), a desulfurization treatment unit, a methanol synthesis unit (17), a cooling unit, a separator (20), an ejector (22), a fuel cell (23), a cathode air compressor (25), a cathode regenerator (26), a waste heat boiler (27), a steam turbine (28) and a pure oxygen combustor (24), wherein a dry coal dust outlet of the coal preparation unit (1) is connected with an inlet of the gasification furnace (2), a high-temperature crude synthesis gas outlet at the top of the gasification furnace (2) and an outlet of the first circulating compressor (5) are both connected with an inlet of the synthesis gas cooler (3), and a synthesis gas outlet of the synthesis gas cooler (3) is divided into two paths, one path is connected with an inlet of the first circulating compressor (5); the other path is connected with a hot side inlet of a first gas heater (6), a hot side outlet of the first gas heater (6) is connected with an inlet of a methanol synthesis unit (17) through a desulfurization treatment unit, an outlet of the methanol synthesis unit (17) is connected with an inlet of a separator (20) through a cooling unit, a purge gas outlet at the top of the separator (20) is connected with a cold side inlet of the first gas heater (6), a cold side outlet of the first gas heater (6) is connected with an inlet of an ejector (22), an outlet of the ejector (22) is connected with an anode inlet of a fuel cell (23), an anode outlet of the fuel cell (23) is connected with an inlet of a pure oxygen burner (24), a tail gas outlet of the pure oxygen burner (24) is connected with an inlet of a waste heat boiler (27), and an exhaust port is arranged on the waste heat boiler (27);
an outlet of the cathode air compressor (25) is connected with a cold side inlet of the cathode heat regenerator (26), a cold side outlet of the cathode heat regenerator (26) is connected with a cathode inlet of the fuel cell (23), a cathode outlet of the fuel cell (23) is connected with a hot side inlet of the cathode heat regenerator (26), and a hot side outlet of the cathode heat regenerator (26) is connected with an inlet of the waste heat boiler (27);
the saturated steam outlet of the synthesis gas cooler (3) is connected with the inlet of the waste heat boiler (27), the superheated steam outlet of the waste heat boiler (27) is connected with the inlet of the steam turbine (28), and the medium-pressure steam outlet of the steam turbine (28) is connected with the inlet of the gasification furnace (2).
2. The coal-based poly-generation system for integrated fuel cell power generation according to claim 1, wherein a raw synthesis gas outlet of the synthesis gas cooler (3) is connected with a dust removal unit (4), and an outlet of the dust removal unit (4) is divided into two paths, one path is connected with an inlet of the first circulating gas compressor (5), and the other path is connected with an inlet of the first gas heater (6).
3. The coal-based poly-generation system for integrated fuel cell power generation according to claim 1, wherein the desulfurization treatment unit comprises a water scrubber (7), a second gas-gas heater (8), a sulfur-tolerant water-gas shift reactor (9), a low-temperature waste heat recovery unit (10), a second synthesis gas cooler (11) and a sulfur-carbon co-stripping unit (12), wherein a hot side outlet of the first gas-gas heater (6) is connected with an inlet of the water scrubber (7), an outlet of the water scrubber (7) is connected with a cold side inlet of the second gas-gas heater (8), a cold side outlet of the second gas-gas heater (8) is connected with an inlet of the sulfur-tolerant water-gas shift reactor (9), an outlet of the sulfur-tolerant water-shift reactor (9) is connected with an inlet of the second gas-gas heater (8), a hot side outlet of the second gas-gas heater (8) is connected with an inlet of the low-temperature waste heat recovery unit (10), an outlet of the low-temperature waste heat recovery unit (10) is connected with an inlet of the second synthesis gas cooler (11), an outlet of the second synthesis gas cooler (11) is connected with an inlet of the sulfur-carbon co-stripping unit (12), and a clean methanol is connected with an inlet of the sulfur-carbon co-stripping unit (12).
4. A coal-based polygeneration system for integrated fuel cell power generation according to claim 3, characterized in that the sulfur-carbon CO-stripping unit (12) is provided with an exhaust gas outlet, and the exhaust gas outlet is connected with CO 2 A compression and liquefaction unit (13) and a sulfur recovery unit (14).
5. The coal-based poly-generation system for integrated fuel cell power generation according to claim 1, wherein a second recycle gas compressor (15) and a third gas heater (16) are arranged between the outlet of the desulfurization treatment unit and the inlet of the methanol synthesis unit (17), wherein the outlet of the desulfurization treatment unit is connected with the inlet of the second recycle gas compressor (15), and the outlet of the second recycle gas compressor (15) is connected with the inlet of the methanol synthesis unit (17) through the cold end of the third gas heater (16).
6. The integrated fuel cell power generation coal-based polygeneration system of claim 5, characterized in that the cooling unit comprises a waste heat boiler (18) and a third syngas cooler (19), wherein an outlet of the methanol synthesis unit (17) is connected to a hot side inlet of the third gas heater (16), a hot side outlet of the third gas heater (16) is connected to an inlet of the waste heat boiler (18), an outlet of the waste heat boiler (18) is connected to an inlet of the third syngas cooler (19), and an outlet of the third syngas cooler (19) is connected to an inlet of the separator (20).
7. The coal-based poly-generation system for integrated fuel cell power generation according to claim 1, wherein the bottom outlet of the separator (20) is connected with a rectifying tower (21), the bottom of the rectifying tower (21) is provided with a methanol product outlet, and the top of the rectifying tower is provided with an acid gas outlet.
8. The integrated fuel cell power generation coal-based polygeneration system of claim 1, further comprising a cryogenic air separation unit (29), an oxygen compressor (30) and a nitrogen compressor (31), wherein an oxygen outlet of the cryogenic air separation unit (29) is connected to an inlet of the oxygen compressor (30) and a nitrogen outlet is connected to an inlet of the nitrogen compressor (31); the outlet of the oxygen compressor (30) is divided into two paths, one path is connected with the oxygen inlet of the gasification furnace (2), and the other path is connected with the inlet of the pure oxygen burner (24); the outlet of the nitrogen compressor (31) is connected with the inlet of the gasification furnace (2).
9. A coal-based polygeneration method for integrated fuel cell power generation, characterized in that the coal-based polygeneration system for integrated fuel cell power generation based on the method of claim 1 comprises the following steps:
raw coal is ground and dried in a coal preparation unit (1) to form dry coal dust, the dry coal dust is conveyed to a gasification furnace (2) by high-pressure nitrogen, pure oxygen and medium-pressure steam extracted from the middle part of a small amount of steam turbines (28) are simultaneously conveyed to the gasification furnace (2) for reaction, and high-temperature crude synthesis gas generated at the top of the gasification furnace (2) is mixed and chilled with low-temperature synthesis gas at the outlet of a first circulating gas compressor (5) and then conveyed to a synthesis gas cooler (3); part of the synthesis gas after waste heat recovery through the synthesis gas cooler (3) is circulated to an inlet of a first circulating gas compressor (5), the other part of the synthesis gas enters a hot side inlet of a first gas heater (6), after being cooled, the synthesis gas is sent to a desulfurization treatment unit for treatment, the generated clean synthesis gas is sent to a methanol synthesis unit (17), after the synthesis reaction, the synthesis gas is sent to a cooling unit for cooling, then the product gas at an outlet of the cooling unit is sent to a separator (20), the purge gas at an outlet at the top of the separator (20) enters a cold side inlet of the first gas heater (6), and then is sent to an ejector (22), part of tail gas at an anode outlet of a fuel cell (23) is ejected, and the synthesis gas at an outlet of the ejector (22) enters an anode of the fuel cell (23) for reaction, and electric power is output;
the rest tail gas at the anode outlet of the fuel cell (23) enters a pure oxygen burner (24) to carry out catalytic combustion reaction with pure oxygen to generate combustion tail gas, and the combustion tail gas is sent into a waste heat boiler (27) to be discharged into the atmosphere after waste heat is recovered;
one air is pressurized by a cathode air compressor (25) and then is sent to a cold side inlet of a cathode heat regenerator (26), high-temperature air at a cold side outlet is sent to a cathode inlet of a fuel cell (23), after reaction in the fuel cell (23), is sent to a hot side inlet of the cathode heat regenerator (26), after being cooled, is sent to a waste heat boiler (27), and is discharged into the atmosphere after waste heat is recovered;
saturated steam generated by the synthesis gas cooler (3) is sent into a waste heat boiler (27) for further heating, and superheated steam generated by the waste heat boiler (27) is sent into a steam turbine (28) for power generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811361277.1A CN109181776B (en) | 2018-11-15 | 2018-11-15 | Coal-based poly-generation system and method for integrated fuel cell power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811361277.1A CN109181776B (en) | 2018-11-15 | 2018-11-15 | Coal-based poly-generation system and method for integrated fuel cell power generation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109181776A CN109181776A (en) | 2019-01-11 |
| CN109181776B true CN109181776B (en) | 2023-11-14 |
Family
ID=64939994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811361277.1A Active CN109181776B (en) | 2018-11-15 | 2018-11-15 | Coal-based poly-generation system and method for integrated fuel cell power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109181776B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218583B (en) * | 2019-07-11 | 2024-04-23 | 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 desulfurization post-conversion process |
| 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 |
| CN112909310A (en) * | 2021-01-21 | 2021-06-04 | 青岛科技大学 | Coal-fired composite power generation system integrated with solid oxide fuel cell |
| CN112952164A (en) * | 2021-01-27 | 2021-06-11 | 大连理工大学 | Device and method for combined heat and power generation by coupling carbon capture coal to prepare methanol and fuel cell |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106497609A (en) * | 2016-12-13 | 2017-03-15 | 中国华能集团清洁能源技术研究院有限公司 | Band CO2Gasification furnace coal powder conveying system and method in the IGCC system of trapping |
| CN209144088U (en) * | 2018-11-15 | 2019-07-23 | 中国华能集团清洁能源技术研究院有限公司 | A kind of coal poly-generation system of integrated fuel cell power generation |
-
2018
- 2018-11-15 CN CN201811361277.1A patent/CN109181776B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106497609A (en) * | 2016-12-13 | 2017-03-15 | 中国华能集团清洁能源技术研究院有限公司 | Band CO2Gasification furnace coal powder conveying system and method in the IGCC system of trapping |
| CN209144088U (en) * | 2018-11-15 | 2019-07-23 | 中国华能集团清洁能源技术研究院有限公司 | A kind of coal poly-generation system of integrated fuel cell power generation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109181776A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109372636B (en) | Three-cycle integrated coal gasification fuel cell power generation system and method with zero carbon emission | |
| KR101739494B1 (en) | Gas-steam efficient cogeneration process and system based on biomass gasification and methanation | |
| CN102079685B (en) | Coal gasification process for methane preparation by two stage gasification stove | |
| US7083658B2 (en) | Hot solids gasifier with CO2 removal and hydrogen production | |
| US10208948B2 (en) | Solid fuel grade gasification-combustion dual bed poly-generation system and method thereof | |
| KR101767287B1 (en) | System for heat integration with methanation system | |
| CN109181776B (en) | Coal-based poly-generation system and method for integrated fuel cell power generation | |
| US8741225B2 (en) | Carbon capture cooling system and method | |
| KR20100135676A (en) | Methods of recycling carbon dioxide to the gasification system | |
| CN109266396B (en) | Supercritical CO 2 Bottom-circulation integrated coal gasification fuel cell power generation system and method | |
| CN109148919B (en) | Integrated coal gasification fuel cell power generation system and method utilizing gas high-temperature sensible heat | |
| CN103045308B (en) | Power generation method and system based on step conversion of hydrocarbon components of coal | |
| CN101993730A (en) | Multifunctional energy system based on appropriate conversion of chemical energy of fossil fuel | |
| CN101915163A (en) | Method and equipment for carrying out oxygen fuel combustion by using hydrogen fuel and gas turbine | |
| CN110257106B (en) | Integrated coal gasification fuel cell power generation system and method adopting coal water slurry gasification | |
| CN110218583B (en) | Integrated coal gasification fuel cell power generation system and method adopting desulfurization post-conversion process | |
| CA1252299A (en) | Power generating station with a high-temperature reactor and a plant for manufacturing chemical raw materials | |
| CN109350988B (en) | CO (carbon monoxide) 2 IGFC power generation system and method with liquefaction process and cryogenic air separation coupling | |
| CN210006832U (en) | water gas fuel cell power generation system | |
| CN104987892A (en) | Chemical-power polygeneration system adopting chemical unreacted gas to moderately circulate based on graded gasification | |
| CN210122940U (en) | Air flow highly-coupled integrated coal gasification fuel cell power generation system | |
| CN104962316B (en) | One kind trapping CO2Classification gasification appropriateness circular form chemical industry power polygenerations systeme | |
| CN110867599A (en) | High-efficiency integrated coal gasification fuel cell power generation system and method adopting high-temperature purification | |
| CN203096004U (en) | Power generation system based on classification and transformation of hydrocarbon components of coal | |
| CN209144088U (en) | A kind of coal poly-generation system of integrated fuel cell power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |