CN113623033A - IGCC system adopting air gasification and working method thereof - Google Patents

IGCC system adopting air gasification and working method thereof Download PDF

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Publication number
CN113623033A
CN113623033A CN202111083092.0A CN202111083092A CN113623033A CN 113623033 A CN113623033 A CN 113623033A CN 202111083092 A CN202111083092 A CN 202111083092A CN 113623033 A CN113623033 A CN 113623033A
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China
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sent
gasification furnace
combustion chamber
air
unit
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Inventor
周贤
彭烁
钟迪
安航
白烨
黄永琪
姚国鹏
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Huaneng Clean Energy Research Institute
Huaneng Group Technology Innovation Center Co Ltd
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Huaneng Clean Energy Research Institute
Huaneng Group Technology Innovation Center Co Ltd
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Priority to CN202111083092.0A priority Critical patent/CN113623033A/en
Publication of CN113623033A publication Critical patent/CN113623033A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/02—Preparation of oxygen
    • C01B13/0229—Purification or separation processes
    • C01B13/0248—Physical processing only
    • C01B13/0251—Physical processing only by making use of membranes
    • C01B13/0255—Physical processing only by making use of membranes characterised by the type of membrane
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B90/00—Combustion methods not related to a particular type of apparatus
    • F23B90/04—Combustion methods not related to a particular type of apparatus including secondary combustion
    • F23B90/06—Combustion methods not related to a particular type of apparatus including secondary combustion the primary combustion being a gasification or pyrolysis in a reductive atmosphere
    • 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
    • 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
    • C10J2300/0953—Gasifying agents
    • C10J2300/0973—Water
    • 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
    • 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
    • C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

The invention discloses an IGCC system adopting air gasification and a working method thereof, comprising a gasification furnace, a combustion chamber and a turbine which are connected in sequence; the gasification furnace and the combustion chamber are connected with the output end of an air compressor, and the combustion chamber, the turbine and the air compressor are arranged at intervals respectively. Coal is pretreated and then sent into a gasification furnace, a strand of water is used as a raw material of gasification reaction and sent into the gasification furnace, the coal is gasified with water and a part of high-pressure air generated by an air compressor in the gasification furnace to generate synthesis gas, the synthesis gas is sent into a combustion chamber, the air compressor sucks air from the atmosphere, most of the generated high-pressure air is sent into the combustion chamber, the other part of the generated high-pressure air is gasified and reacted in the gasification furnace, and the air and the synthesis gas are combusted in the combustion chamber to generate high-temperature flue gas which is sent into a turbine to generate power. A cryogenic air separation device is omitted, the power generation flexibility of the IGCC system is improved, and the problem of through-flow matching of a gas turbine is solved.

Description

IGCC system adopting air gasification and working method thereof
Technical Field
The invention belongs to the field of coal gasification combined cycle systems, and relates to an IGCC (integrated gasification combined cycle) system adopting air gasification and a working method thereof.
Background
At present, most IGCC adopt pure oxygen gasification process, and a cryogenic air separation device is required to be configured. However, the cryogenic air separation plant has the problems of complex flow, high cost, difficult load adjustment and large inertia. Although the gas-steam combined cycle power generation technology has the advantage of flexible and rapid electric load adjustment, the method is limited by poor flexibility of a cryogenic air separation plant, the load flexibility of the whole IGCC system is not high, and the method can basically only bear the basic load of a power grid. Under the background of large-scale grid connection of the current renewable energy power generation with strong intermittence, the defect of poor flexibility of the IGCC is amplified, and the development of the IGCC technology is limited.
In addition, the existing IGCC systems all adopt a gas turbine integrating a gas compressor, a combustion chamber and a turbine, and after the gas turbine uses low-calorific-value gasified syngas, the problems of through-flow matching, high NOx emission, unstable combustion and the like are encountered, and the gas turbine in the IGCC is difficult to exert the advantage of high power generation efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the IGCC system adopting air gasification and the working method thereof, so that a cryogenic air separation device is omitted, the power generation flexibility of the IGCC system is improved, and the problem of through flow matching of a gas turbine is solved.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
an IGCC system adopting air gasification comprises a gasification furnace, a combustion chamber and a turbine which are connected in sequence;
the gasification furnace and the combustion chamber are connected with the output end of an air compressor, and the combustion chamber, the turbine and the air compressor are arranged at intervals respectively.
Preferably, the gas pressure at the outlet of the air compressor is 12-20 bar.
Preferably, a gas cooler, a dust removal unit, a desulfurization unit and a synthesis gas control unit are sequentially connected between the gasification furnace and the combustion chamber, the inlet of the gas cooler is connected with the outlet of the gasification furnace, and the outlet of the synthesis gas control unit is connected with the inlet of the combustion chamber.
Further, a low-temperature waste heat recovery unit is arranged between the dust removal unit and the desulfurization unit.
Furthermore, the outlet of the gas cooler is connected with the inlet of a waste heat boiler.
Further, the desulfurization unit is connected with a sulfur recovery unit.
Further, the outlet of the dust removal unit is connected with the inlet of the gasification furnace.
Preferably, the outlet of the waste heat boiler is connected with the inlet of a steam turbine.
A method of operating an IGCC system based on any of the above integrated high temperature ion transport membrane oxygen generation, comprising the steps of:
coal is pretreated and then sent into a gasification furnace, a strand of water is used as a raw material of gasification reaction and sent into the gasification furnace, the coal is gasified with water and a part of high-pressure air generated by an air compressor in the gasification furnace to generate synthesis gas, the synthesis gas is sent into a combustion chamber, the air compressor sucks air from the atmosphere, most of the generated high-pressure air is sent into the combustion chamber, the other part of the generated high-pressure air is gasified and reacted in the gasification furnace, and the air and the synthesis gas are combusted in the combustion chamber to generate high-temperature flue gas which is sent into a turbine to generate power.
Preferably, the synthesis gas generated in the gasification furnace is cooled in a gas cooler, steam is generated at the same time, the synthesis gas is sent to a waste heat boiler, the synthesis gas is sent to a low-temperature waste heat recovery unit after passing through a dust removal unit, and fly ash generated by the dust removal unit is recycled to the gasification furnace; and the synthesis gas further cooled in the low-temperature waste heat recovery unit is sent to a desulfurization unit, the acid gas generated by the desulfurization unit is sent to a sulfur recovery unit to generate sulfur, and the clean synthesis gas generated by the desulfurization unit is diluted in a synthesis gas modulation unit and then sent to a combustion chamber.
Compared with the prior art, the invention has the following beneficial effects:
the invention decomposes the gas turbine in the traditional IGCC system into three parts of an air compressor, a combustion chamber and a turbine, thereby avoiding the problem of through-flow matching of the gas turbine. The high-pressure air generated by the air compressor is used as the gasifying agent in the gasification furnace, so that a cryogenic air separation device is omitted, the flow is simple, and the system cost is low. The air compressor provides the air required by the gasification furnace and the combustion chamber simultaneously, the capacity of the air compressor is increased, and the compression efficiency is improved. Compared with pure oxygen gasification, the gasification furnace adopts air gasification, and a large amount of inert nitrogen is mixed in the synthetic gas generated by the gasification furnace, so that excessive steam consumption caused by further diluting combustible components of fuel gas in the synthetic gas preparation process is avoided, and the improvement of the net power generation efficiency of the system is facilitated.
Furthermore, steam generated by the gas cooler is sent to the waste heat boiler to be overheated continuously and then sent to the steam turbine to generate electricity, so that the generating efficiency of the system is improved.
Furthermore, the sulfur recovery unit can generate sulfur from the acid gas generated by the desulfurization unit, so that the sulfur is prevented from being discharged into the atmosphere to pollute the environment.
Furthermore, the output end of the dust removal unit is connected with the gasification furnace, so that the fly ash generated by the dust removal unit can be recycled into the gasification furnace, and the environment pollution caused by the fly ash discharged into the atmosphere is avoided.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein: 1-gasification furnace; 2-gas cooler; 3-a dust removal unit; 4-a low temperature waste heat recovery unit; 5-a desulfurization unit; 6-a sulfur recovery unit; 7-synthetic gas modulation unit; 8-a combustion chamber; 9-a gas compressor; 10-turbine; 11-a waste heat boiler; 12-a steam turbine.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the IGCC system using air gasification according to the present invention includes a gasification furnace 1, a gas cooler 2, a dust removal unit 3, a low temperature waste heat recovery unit 4, a desulfurization unit 5, a syngas modulation unit 7, a combustion chamber 8, a turbine 10, a waste heat boiler 11, and a steam turbine 12, which are connected in sequence.
The inlet of the gasification furnace 1 is communicated with water vapor and coal.
The gas outlet of the gas cooler 2 is connected with the waste heat boiler, and the steam generated by the gas cooler 2 is sent to the waste heat boiler 11 to be overheated continuously and then sent to the steam turbine 12 to generate power, so that the power generation efficiency of the system is improved.
The outlet of the dust removal unit 3 is connected with the inlet of the gasification furnace 1, so that the fly ash generated by the dust removal unit 3 can be recycled to the gasification furnace 1, and the environment pollution caused by the fly ash discharged into the atmosphere is avoided.
The desulfurization unit 5 is connected with a sulfur recovery unit 6, and the sulfur recovery unit 6 can generate sulfur from the acidic gas generated by the desulfurization unit 5, so that the acidic gas is prevented from being discharged into the atmosphere to pollute the environment.
The gasification furnace 1 and the combustion chamber 8 are connected with the output end of an air compressor 9, and the combustion chamber 8, the turbine 10 and the air compressor 9 are arranged at intervals respectively.
The gas pressure at the outlet of the air compressor 9 is 12-20 bar.
Compared with the air compressor of the gas turbine, the air compressor 9 has increased air flow rate, and the air compressor 9 needs to be processed and selected again according to 110-120% of the designed air flow rate of the inlet of the gas turbine, so that risks such as surging of the gas turbine are avoided. The IGCC system is more flexible and reliable in operation, and the problem of operation control caused by deep coupling between the gas turbine and the gasification furnace is also avoided.
The working process of the IGCC system adopting air gasification comprises the following steps:
coal is pretreated and then sent into a gasification furnace 1, a strand of water is used as a raw material of gasification reaction and simultaneously sent into the gasification furnace 1, the coal is gasified and reacted with water and a part of high-pressure air generated by an air compressor 9 in the gasification furnace 1 to generate crude synthesis gas, and ash slag generated in the gasification process is discharged from the gasification furnace 1. The raw synthesis gas is cooled in the gas cooler 2, and at the same time, steam is generated and sent to the waste heat boiler 11. The raw synthesis gas is sent to a low-temperature waste heat recovery unit 4 after passing through a dust removal unit 3, and fly ash generated by the dust removal unit 3 is recycled to the gasification furnace 1. The further cooled synthesis gas is sent to a desulfurization unit 5, the acid gas generated by the desulfurization unit 5 is sent to a sulfur recovery unit 6 to generate sulfur, and the clean synthesis gas generated by the desulfurization unit 5 is diluted by a synthesis gas modulation unit 7 and then sent to a combustion chamber 8. The air compressor 9 sucks air from the atmosphere, and most of the generated high-pressure air is sent to the combustion chamber 8, and the other part of the high-pressure air undergoes a gasification reaction in the gasification furnace 1. After the air and the synthesis gas are combusted in the combustion chamber 8, high-temperature flue gas is generated and sent to a turbine 10 for power generation. The flue gas with higher temperature at the outlet of the turbine 10 is sent to a waste heat boiler 11, and the steam generated by the waste heat boiler 11 is sent to a turbine 12 for power generation.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1. An IGCC system adopting air gasification is characterized by comprising a gasification furnace (1), a combustion chamber (8) and a turbine (10) which are connected in sequence;
the gasification furnace (1) and the combustion chamber (8) are respectively connected with the inlet of the air compressor (9) at the output end, and the combustion chamber (8), the turbine (10) and the air compressor (9) are respectively arranged at intervals.
2. The IGCC system for integrated high temperature ion transport membrane oxygen generation as claimed in claim 1 wherein the gas pressure at the outlet of the air compressor (9) is 12-20 bar.
3. The IGCC system for integrated high temperature ion transport membrane oxygen generation as claimed in claim 1, wherein a gas cooler (2), a dust removal unit (3), a desulfurization unit (5) and a synthesis gas modulation unit (7) are connected between the gasification furnace (1) and the combustion chamber (8) in sequence, the inlet of the gas cooler (2) is connected with the outlet of the gasification furnace (1), and the outlet of the synthesis gas modulation unit (7) is connected with the inlet of the combustion chamber (8).
4. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 3, characterized in that a low temperature waste heat recovery unit (4) is arranged between the dust removal unit (3) and the desulphurization unit (5).
5. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 3, characterized in that the outlet of the gas cooler (2) is connected with the inlet of a waste heat boiler (11).
6. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 3, characterized by the sulfur recovery unit (6) connected to the desulfurization unit (5).
7. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 3, characterized in that the dust removal unit (3) outlet is connected with the gasifier (1) inlet.
8. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 1 characterized by that the exhaust heat boiler (11) outlet is connected with the inlet of the steam turbine (12).
9. A method of operating an IGCC system based on integrated high temperature ion transport membrane oxygen generation as claimed in any of claims 1-8, comprising the following process:
coal is pretreated and then sent into a gasification furnace (1), a strand of water is used as a raw material of gasification reaction and is sent into the gasification furnace (1), the coal, the water and a part of high-pressure air generated by an air compressor (9) in the gasification furnace (1) are subjected to gasification reaction to generate synthesis gas, the synthesis gas is sent into a combustion chamber (8), the air compressor (9) sucks air from the atmosphere, most of the generated high-pressure air is sent into the combustion chamber (8), the other part of the generated high-pressure air is subjected to gasification reaction in the gasification furnace (1), and the air and the synthesis gas are combusted in the combustion chamber (8) to generate high-temperature flue gas which is sent into a turbine (10) to generate electricity.
10. The operating method of the IGCC system for integrated high temperature ion transport membrane oxygen production as claimed in claim 9, wherein the synthesis gas generated in the gasification furnace (1) is cooled in the gas cooler (2) and simultaneously generates steam, the steam is sent to the waste heat boiler (11), the synthesis gas is sent to the low temperature waste heat recovery unit (4) after passing through the dust removal unit (3), and the fly ash generated by the dust removal unit (3) is recycled to the gasification furnace; the synthesis gas further cooled in the low-temperature waste heat recovery unit (4) is sent to a desulfurization unit (5), the acid gas generated by the desulfurization unit (5) is sent to a sulfur recovery unit (6) to generate sulfur, and the clean synthesis gas generated by the desulfurization unit (5) is diluted in a synthesis gas modulation unit (7) and then sent to a combustion chamber (8).
CN202111083092.0A 2021-09-15 2021-09-15 IGCC system adopting air gasification and working method thereof Pending CN113623033A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114251670A (en) * 2021-12-20 2022-03-29 上海域德环保工程有限公司 Hazardous waste incineration fly ash fused salt and flue gas treatment device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114251670A (en) * 2021-12-20 2022-03-29 上海域德环保工程有限公司 Hazardous waste incineration fly ash fused salt and flue gas treatment device

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