CN108442982B - Solar integrated coal-based methanol synthesis and power generation co-production system - Google Patents
Solar integrated coal-based methanol synthesis and power generation co-production system Download PDFInfo
- Publication number
- CN108442982B CN108442982B CN201810380479.4A CN201810380479A CN108442982B CN 108442982 B CN108442982 B CN 108442982B CN 201810380479 A CN201810380479 A CN 201810380479A CN 108442982 B CN108442982 B CN 108442982B
- Authority
- CN
- China
- Prior art keywords
- gas
- coal
- heat exchanger
- water
- enters
- 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
Classifications
-
- 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
-
- 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
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- 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
- C10J2300/12—Heating the gasifier
- C10J2300/1284—Heating the gasifier by renewable energy, e.g. solar energy, photovoltaic cells, wind
- C10J2300/1292—Heating the gasifier by renewable energy, e.g. solar energy, photovoltaic cells, wind mSolar energy
-
- 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
- C10J2300/164—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
-
- 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
- C10J2300/1675—Integration of gasification processes with another plant or parts within the plant with the production of electricity making use of a steam turbine
-
- 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
-
- 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
- Y02P20/133—Renewable energy sources, e.g. sunlight
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a solar integrated coal-based methanol synthesis and power generation co-production system, which belongs to the field of coal grading utilization. The system mainly comprises three subsystems of solar energy upgrading, methanol synthesis, coal-fired power generation and the like. In the system, solar-driven coal upgrading, methanol synthesis and coal-fired power generation are coupled, and trough-type and tower-type solar energy respectively provides heat for pyrolysis and gasification of coal, so that waste heat and waste materials in the upgrading and methanol synthesis processes are recycled in a cascade manner through a boiler and a steam-water system of a coal-fired power generation unit. The system widens the utilization path of solar energy through high-efficiency system integrated coupling, realizes coal-based poly-generation, and is expected to reduce fossil energy consumption and improve comprehensive utilization efficiency of energy.
Description
Technical Field
The invention belongs to the field of classified utilization of coal, and particularly relates to a solar-energy-integrated coal-based methanol synthesis and power generation co-production system, in particular to a solar-energy-assisted coal classification quality improvement and methanol synthesis integrated power generation system.
Background
Coal is the fossil energy with the largest storage capacity in the world, the currently detected storage capacity is about one trillion tons, almost three times of the petroleum storage capacity, and the world energy safety is guaranteed. However, in the process of utilizing coal, the problems of low energy utilization efficiency, serious emission of carbon dioxide and pollutants and the like often occur. With increasing importance on energy safety, environmental protection and the like, efficient clean utilization of coal resources is an important research direction at present.
The indirect coal liquefaction technology is a clean utilization mode of coal resources, firstly, coal is gasified, and the produced synthesis gas is further processed into liquid fuel (methanol and the like), so that the emission of carbon dioxide and pollutants can be effectively reduced, and the utilization way of coal is widened. However, in the traditional coal indirect liquefaction process, the quality improvement processes such as coal pyrolysis, gasification and the like need to absorb a large amount of energy, and partial combustion of the coal is usually needed to provide the energy; the efficiency of utilizing waste heat generated in the upgrading of coal and the methanol synthesis process is often poor. If solar energy is introduced in the upgrading process of coal and is deeply coupled with a conventional coal-fired generator set, the comprehensive utilization efficiency of energy is expected to be further improved, and the emission of carbon and pollutants is reduced.
In summary, the invention provides a co-production system integrating solar energy and coal-based methanol synthesis and power generation, which is expected to further improve the energy utilization efficiency, reduce fossil energy consumption and reduce the emission of carbon dioxide and pollutants; the system is used for carrying out high-efficiency coupling on the three components of solar auxiliary coal upgrading, methanol synthesis and coal-fired power generation, reasonably and step-wise utilizing energy of different tastes, realizing poly-generation of methanol, upgraded coal and electric power, and having wide application prospects in the field of hierarchical utilization of coal.
Disclosure of Invention
The invention aims to provide a solar integrated coal-based methanol synthesis and power generation co-production system, which mainly comprises a solar proton extraction system, a methanol synthesis subsystem and a coal-fired power generation subsystem; the coal crusher is characterized in that the coal crusher 1 is connected with a pre-drying device 2, the pre-drying device 2 is respectively connected with a boiler 22 and a pyrolysis furnace 3, the pyrolysis furnace 3 is respectively connected with a solar heat collector 4, a gasification furnace 5 and a high Wen Lengmei device 29, and the high Wen Lengmei device 29 is connected in series with a low-temperature Leng Mei device 30 and a compression molding device 31; the high Wen Lengmei device 29 is correspondingly connected with an input port and an output port of the high-pressure heater 28 respectively, the high-pressure heater 28 is connected with high-pressure steam extraction of the steam turbine 23, and the high-pressure steam extraction of the steam turbine 23 is connected with the gasification furnace 5 in the solar proton extraction system; the low-pressure heater 26 is connected with low-pressure steam extraction of the steam turbine 23, and the low Wen Lengmei device 30 is correspondingly connected with an input port and an output port of the low-pressure heater 26 respectively; the steam turbine 23 is connected with a generator 24, the exhaust steam of the steam turbine is connected with a condenser 25, and the condenser 25 is connected with a low-pressure heater 26; the high-pressure heater 28 and the low-pressure heater 26 are connected through a water supply pump 27; the high-pressure heater 28 is connected in series with the boiler 22 and the steam turbine 23; the output of the gasification furnace 5 is connected with a No. 1 gas-water heat exchanger 8 in the methanol synthesis subsystem, and the No. 1 gas-water heat exchanger 8 is connected with a steam turbine 23; the No. 1 gas-water heat exchanger 8 is connected with the CO converter 9 and the No. 2 gas-water heat exchanger 10 to form a loop; the No. 1 gas-water heat exchanger 8 is also directly connected with the No. 3 gas-water heat exchanger 11 by bypassing the CO converter 9, and the No. 3 gas-water heat exchanger 11 is respectively connected with the No. 2 gas-water heat exchanger 10 and the output port of the high-pressure heater 28; the No. 3 gas-water heat exchanger 11 is also connected with the No. 5 gas-water heat exchanger 12, the purifying device 13, the gas compressor 14, the gas-gas heat exchanger 15, the methanol synthesizer 16 and the No. 4 gas-water heat exchanger 17 in series to form a loop; wherein, the No. 5 gas-water heat exchanger 12 is respectively connected with the input port and the output port of the low-pressure heater 26; the No. 4 gas-water heat exchanger 17 is also connected with the input port of the high-pressure heater 28; the compressor 14 is also connected in series with the gas-gas heat exchanger 15, the gas-liquid heat exchanger 20 and the gas-liquid separation device 19 to form a loop; the cooler 18 is respectively connected with a gas-liquid heat exchanger 20 and a gas-liquid separation device 19; the output of the gas-liquid heat exchanger 20 is connected with a methanol purifier 21, and the solar energy is projected onto a reflector 7 through a heliostat 6 and then is concentrated into the gasification furnace 5.
According to the working principle of the integrated solar coal-based methanol synthesis and power generation co-production system, raw coal is crushed by a coal crusher, enters a pre-drying device for drying, part of raw coal enters a boiler for combustion, the rest of raw coal enters a pyrolysis furnace for low-temperature pyrolysis reaction at 400 ℃, part of high-temperature upgraded coal generated by the pyrolysis furnace enters a coal-fired power generation subsystem, is cooled by a high Wen Lengmei device and a low-temperature Leng Mei device, and then enters a compression molding device for compression molding, so that upgraded coal convenient to transport is produced; the rest high temperature upgraded coal and other pyrolysis products enter a gasification furnace to carry out gasification reaction with high pressure extraction steam from a steam turbine, the reaction temperature is 1000 ℃, synthesis gas and gasification slag are generated, gasification slag enters a boiler to burn, the synthesis gas enters a methanol synthesis subsystem, the temperature is reduced to 400 ℃ through a No. 1 gas-water heat exchanger, a part of the synthesis gas enters a CO converter to regulate H2/CO proportional coefficient, then the synthesis gas is mixed with the rest synthesis gas, the synthesis gas after temperature reduction sequentially passes through a No. 3 gas-water heat exchanger and a No. 5 gas-water heat exchanger to be reduced to 30 ℃, the cooled synthesis gas enters a purification device to remove sulfur, carbon dioxide and other impurity gases, the purified synthesis gas is mixed with recycle gas separated by a gas-liquid separation device to enter a gas compressor to be pressurized, then the mixture is preheated by the gas-gas heat exchanger to enter a methanol synthesizer to carry out methanol synthesis, the generated methanol/synthesis gas mixture sequentially enters the gas-gas heat exchanger, the gas-liquid heat exchanger and the cooler to be cooled to 40 ℃, and the cooled gas-liquid mixture enters the gas-liquid separator to be used as recycle gas, and the rest synthesis gas enters the boiler to be mixed as unreacted gas; the separated crude methanol is heated by a gas-liquid heat exchanger and enters a methanol purifier to produce methanol with higher purity; in the solar proton extraction system, a part of solar energy heats heat conduction oil through a groove type heat collector, and enters a pyrolysis furnace to provide heat for a pyrolysis process; a part of solar energy is projected onto the reflector through the heliostat and then is concentrated into the gasification furnace to provide heat for the gasification process; in a coal-fired power generation subsystem, gasified slag, unreacted gas and pre-dried coal are used as fuel to enter a boiler for combustion, water supply is heated, generated high-temperature steam is mixed with a heat exchanger from gas-water No. 1 and enters a steam turbine, a generator is driven to generate electricity, generated exhaust steam enters a condenser for cooling into condensed water, part of the condensed water enters a low-temperature Leng Meiqi for cooling upgraded coal, part of the condensed water enters a heat exchanger from gas-water No. 5 for cooling synthetic gas, the rest of the condensed water enters a low-pressure heater for heating by low-pressure steam extraction from the steam turbine, the three are mixed and enter a water supply pump for pressurization, part of generated high-pressure water enters a high-pressure heater for heating by the high-pressure steam extraction from the steam turbine, part of the generated high-pressure water enters a heat exchanger from gas-water No. Wen Lengmei for cooling upgraded coal, the rest of the high-temperature steam enters a heat exchanger from gas-water No. 4 for absorbing reaction heat in a methanol synthesis process, then enters a heat exchanger from gas-water No. 3 for absorbing sensible heat of synthetic gas, a part of generated high-temperature water enters a heat exchanger from gas-water No. 2 for absorbing CO conversion reaction heat, high-temperature synthetic gas is absorbed by the heat exchanger from gas No. 1, and high-temperature synthetic gas is generated, and high-temperature steam generated by the high-temperature heat steam is generated by the boiler; the rest high-temperature water generated by the No. 3 gas-water heat exchanger is mixed with the high-temperature water at the outlet of the high-Wen Lengmei device and the high-pressure heater and enters the boiler as feed water.
In the solar proton extraction system, a part of solar energy heats heat conduction oil through a groove type heat collector, and enters a pyrolysis furnace to provide heat for a pyrolysis process; a portion of the solar energy is projected through the heliostats onto the reflector and then concentrated into the gasifier to provide heat for the gasification process.
The condensing water generated by cooling the condenser partially enters a low-temperature Leng Meiqi heat-stripping coal, a part of the condensing water enters a No. 5 gas-water heat exchanger to cool synthetic gas, the rest of the condensing water enters a low-pressure heater to be heated by low-pressure steam extraction from a steam turbine, the three are mixed and enter a water feeding pump to be pressurized, a part of generated high-pressure water enters a high-pressure heater to be heated by high-pressure steam extraction from the steam turbine, a part of the generated high-pressure water enters a high-Wen Lengmei heat exchanger to cool the stripping coal, the rest of the high-pressure water enters a No. 4 gas-water heat exchanger to absorb reaction heat in a methanol synthesis process, then enters a No. 3 gas-water heat exchanger to absorb synthetic gas sensible heat, the generated high-temperature water heat is absorbed by a No. 2 gas-water heat exchanger to absorb CO conversion reaction heat, and the sensible heat of the high-temperature synthetic gas is absorbed by a No. 1 gas-water heat exchanger to generate high-temperature steam to be mixed with high-temperature steam generated by a boiler; the rest high-temperature water generated by the No. 3 gas-water heat exchanger is mixed with the high-temperature water at the outlet of the high-Wen Lengmei device and the high-pressure heater and enters the boiler as feed water.
The unreacted gas separated by the gasification slag and gas-liquid separator generated by the gasification furnace and part of pre-drying coal at the outlet of the pre-drying device enter a boiler to be combusted, and the water supply is heated.
The high-temperature upgraded coal generated by the pyrolysis furnace partially enters a gasification furnace for gasification reaction to generate synthesis gas; the rest of the coal enters a coal-fired power generation subsystem, is cooled by a high Wen Lengmei device and a low temperature Leng Mei device, and then enters a compression molding device for compression molding, so that the quality-improved lump coal which is convenient to transport is produced.
The invention has the following advantages and beneficial effects: fossil energy consumption in the upgrading processes of coal pyrolysis, gasification and the like can be reduced by introducing solar energy, and emission of pollutants and carbon dioxide is reduced; meanwhile, through coupling with the boiler and the steam-water system of the coal-fired power station, the comprehensive utilization efficiency of coal can be greatly improved, the classified utilization of coal is realized, and the method has the following characteristics:
1. the heat of different temperatures in different areas generated by different heat collectors is respectively used for two upgrading processes of pyrolysis and gasification of coal, so that the cascade utilization of solar energy is realized, the investment cost of a solar heat collection field is reduced, the quality utilization of coal can be realized, and the fossil energy consumption and the emission of carbon dioxide and pollutants in the coal upgrading process are reduced.
2. The quality improvement of coal and the methanol synthesis process are coupled with the coal-fired unit, the good fuel adaptability of the boiler is utilized, the pyrolysis waste residue and the methanol synthesis waste gas can be recovered, and meanwhile, the waste heat in the process can be reasonably recovered through a steam-water system with a wide continuous temperature interval, so that the cascade utilization of energy is realized, and the comprehensive utilization efficiency of energy is improved.
3. Based on the system coupling of coal-based methanol and coal-fired electricity generation, a part of upgraded coal generated by a pyrolyzer of the solar upgrading unit is used for gasification, and the other part of upgraded coal can be separated and processed into upgraded lump coal, so that the input of solar energy is increased, high-quality upgraded coal convenient to transport is produced, and the utilization way of the coal is enriched.
Drawings
Fig. 1 is a schematic diagram of a solar-integrated coal-based methanol synthesis and cogeneration system.
In the figure: 1-coal pulverizer, 2-predrying unit, 3-pyrolysis furnace, 4-trough collector, 5-gasification furnace, 6-heliostat, 7-reflector, 8-1 gas-water heat exchanger, 9-CO converter, 10-2 gas-water heat exchanger, 11-3 gas-water heat exchanger, 12-5 gas-water heat exchanger, 13-purification unit, 14-compressor, 15-gas heat exchanger, 16-methanol synthesizer, 17-4 gas-water heat exchanger, 18-cooler, 19-gas-liquid separation unit, 20-gas-liquid heat exchanger, 21-methanol purifier, 22-boiler, 23-steam turbine, 24-generator, 25-condenser, 26-low pressure heater, 27-feed pump, 28-high pressure heater, 29-high Wen Lengmei, 30-low temperature Leng Mei, 31-compression molding unit
Detailed Description
The invention provides a solar integrated coal-based methanol synthesis and power generation co-production system, which is described below with reference to the accompanying drawings.
The integrated solar coal-based methanol synthesis and power generation co-production system shown in fig. 1 comprises a solar proton extraction system, a methanol synthesis subsystem and a coal-fired power generation subsystem; the coal pulverizer 1 is connected with a pre-drying device 2, the pre-drying device 2 is respectively connected with a boiler 22 and a pyrolysis furnace 3, the pyrolysis furnace 3 is respectively connected with a solar heat collector 4, a gasification furnace 5 and a high Wen Lengmei device 29, and the high Wen Lengmei device 29 is connected in series with a low-temperature Leng Mei device 30 and a compression molding device 31; the high Wen Lengmei device 29 is correspondingly connected with an input port and an output port of the high-pressure heater 28 respectively, the high-pressure heater 28 is connected with high-pressure steam extraction of the steam turbine 23, and the high-pressure steam extraction of the steam turbine 23 is connected with the gasification furnace 5 in the solar proton extraction system; the low-pressure heater 26 is connected with low-pressure steam extraction of the steam turbine 23, and the low Wen Lengmei device 30 is correspondingly connected with an input port and an output port of the low-pressure heater 26 respectively; the steam turbine 23 is connected with a generator 24, the exhaust steam of the steam turbine is connected with a condenser 25, and the condenser 25 is connected with a low-pressure heater 26; the high-pressure heater 28 and the low-pressure heater 26 are connected through a water supply pump 27; the high-pressure heater 28 is connected in series with the boiler 22 and the steam turbine 23; the output of the gasification furnace 5 is connected with a No. 1 gas-water heat exchanger 8 in the methanol synthesis subsystem, and the No. 1 gas-water heat exchanger 8 is connected with a steam turbine 23; the No. 1 gas-water heat exchanger 8 is connected with the CO converter 9 and the No. 2 gas-water heat exchanger 10 to form a loop; the No. 1 gas-water heat exchanger 8 is also directly connected with the No. 3 gas-water heat exchanger 11 by bypassing the CO converter 9, and the No. 3 gas-water heat exchanger 11 is respectively connected with the No. 2 gas-water heat exchanger 10 and the output port of the high-pressure heater 28; the No. 3 gas-water heat exchanger 11 is also connected with the No. 5 gas-water heat exchanger 12, the purifying device 13, the gas compressor 14, the gas-gas heat exchanger 15, the methanol synthesizer 16 and the No. 4 gas-water heat exchanger 17 in series to form a loop; wherein, the No. 5 gas-water heat exchanger 12 is respectively connected with the input port and the output port of the low-pressure heater 26; the No. 4 gas-water heat exchanger 17 is also connected with the input port of the high-pressure heater 28; the compressor 14 is also connected in series with the gas-gas heat exchanger 15, the gas-liquid heat exchanger 20 and the gas-liquid separation device 19 to form a loop; the cooler 18 is respectively connected with a gas-liquid heat exchanger 20 and a gas-liquid separation device 19; the output of the gas-liquid heat exchanger 20 is connected with a methanol purifier 21;
the solar energy is projected by heliostats 6 onto reflectors 7 and then concentrated into gasifier 5.
According to the working principle of the integrated solar coal-based methanol synthesis and power generation co-production system, raw coal is crushed by a coal crusher 1, enters a pre-drying device 2 for drying, part of raw coal enters a boiler 22 for combustion, the rest of raw coal enters a pyrolysis furnace 3 for low-temperature pyrolysis reaction, the reaction temperature is 400 ℃, part of high-temperature upgraded coal generated by the reaction enters a coal-fired power generation subsystem, is cooled by a high Wen Lengmei device 29 and a low-temperature Leng Mei device 30, and then enters a compression molding device 31 for compression molding, so that upgraded coal which is convenient to transport is produced; the rest high temperature upgraded coal and other pyrolysis products enter the gasification furnace 5 to carry out gasification reaction with high pressure extraction steam from the steam turbine 23, the reaction temperature is 1000 ℃, synthesis gas and gasification slag are generated, gasification slag enters the boiler 22 to burn, synthesis gas enters the methanol synthesis subsystem, the temperature is reduced to 400 ℃ through the No. 1 gas-water vapor heat exchanger 8, a part of synthesis gas enters the CO converter 9 to adjust the H2/CO proportionality coefficient, then the synthesis gas is mixed with the rest synthesis gas, the temperature is reduced to 30 ℃ through the No. 3 gas-water heat exchanger 11 and the No. 5 gas-water heat exchanger 12 in sequence, the cooled synthesis gas enters the purification device 13 to remove sulfur, carbon dioxide and other impurity gases, the purified synthesis gas and the recycle gas separated by the gas-liquid separation device 19 are mixed to enter the gas compressor 14 to be pressurized, then the synthesis gas enters the methanol synthesizer 16 to carry out methanol synthesis, the generated methanol/synthesis gas mixture gas sequentially enters the gas-gas heat exchanger 15, the gas-liquid heat exchanger 20 and the cooler 18 to be cooled to 40 ℃, and the cooled synthesis gas mixture enters the gas-liquid separator 19 in sequence, and a part of the separated synthesis gas enters the synthesis gas as the non-mixed gas of the boiler as the combustion gas of the rest of the recycle gas 13; the separated crude methanol is heated by a gas-liquid heat exchanger 20 and enters a methanol purifier 21 to produce methanol with higher purity; in the solar proton extraction system, a part of solar energy heats heat conduction oil through a groove type heat collector 4, and enters a pyrolysis furnace 3 to provide heat for the pyrolysis process; a part of solar energy is projected onto the reflector 7 through the heliostat 6 and then is concentrated into the gasification furnace 5 to provide heat for the gasification process; in a coal-fired power generation subsystem, gasified slag, unreacted gas and pre-dried coal are used as fuel to enter a boiler 22 for combustion, water supply is heated, generated high-temperature steam is mixed with water from a No. 1 gas-water vapor heat exchanger 8 and enters a steam turbine 23, a generator 24 is driven to generate power, generated exhaust steam enters a condenser 25 for cooling into condensed water, a part of the condensed water enters a low-temperature Leng Mei device 30 for cooling upgraded coal, a part of the condensed water enters a No. 5 gas-water heat exchanger 12 for cooling synthetic gas, the rest of the condensed water enters a low-pressure heater 26 for heating by low-pressure steam extraction from the steam turbine 23, the three are mixed and enter a water supply pump 27 for pressurization, a part of generated high-pressure water enters a high-pressure heater 28 for heating by high-pressure steam extraction from the steam turbine 23, a part of the generated high-pressure water enters a high-Wen Lengmei device 29 for cooling upgraded coal, the rest of the high-pressure steam enters a No. 4 gas-water heat exchanger 17 for absorbing reaction heat in a methanol synthesis process, then enters a No. 3 gas-water heat exchanger 11 for absorbing sensible heat of the synthetic gas, high-temperature water of 270 ℃, a part of the condensed water enters a No. 2 gas-water heat exchanger 10 for absorbing CO conversion reaction heat, the high-temperature heat is generated by the No. 1 gas-water heat exchanger, a high-temperature heat exchanger for absorbing the high-temperature steam generated by the high-temperature heat of the high-pressure heat steam from the steam turbine 23, and high-temperature steam generated by the high-temperature steam is mixed with high-temperature steam generated by the high-temperature steam; the rest of high-temperature water generated by the No. 3 gas-water heat exchanger 11 is mixed with high-temperature water at the outlet of the high-pressure Wen Lengmei device 29 and the high-pressure heater 28 and enters the boiler 22 as feed water.
In the solar proton extracting system, a part of solar energy is heated by a groove type heat collector 4 to heat conducting oil, and enters a pyrolysis furnace 3 to provide heat for the pyrolysis process; a portion of the solar energy is projected through heliostats 6 onto reflector 7 and then concentrated into gasifier 5 to provide heat for the gasification process.
The unreacted gas separated by the gasification slag and gas-liquid separator 19 generated by the gasification furnace 5 and part of the pre-drying coal at the outlet of the pre-drying device 2 enter a boiler 22 to be burnt, and the feed water is heated.
The high-temperature upgraded coal generated by the pyrolysis furnace 3 enters a gasification furnace 5 for gasification reaction to generate synthesis gas; the rest of the coal-fired coal enters a coal-fired power generation subsystem, is cooled by a high Wen Lengmei device 29 and a low temperature Leng Mei device 30, and then enters a compression molding device 31 for compression molding, so that the quality-improved lump coal which is convenient to transport is produced.
Claims (5)
1. A coal-based methanol synthesis and power generation co-production system integrating solar energy comprises a solar proton extraction system, a methanol synthesis subsystem and a coal-fired power generation subsystem; it is characterized in that the method comprises the steps of,
the coal crusher (1) is connected with a pre-drying device (2), the pre-drying device (2) is respectively connected with a boiler (22) and a pyrolysis furnace (3), the pyrolysis furnace (3) is respectively connected with a solar trough collector (4), a gasification furnace (5) and a high Wen Lengmei device (29), and the high Wen Lengmei device (29) is connected in series with a low temperature Leng Meiqi (30) and a compression molding device (31); the high Wen Lengmei device (29) is correspondingly connected with an input port and an output port of the high-pressure heater (28) respectively, the high-pressure heater (28) is connected with high-pressure steam extraction of the steam turbine (23), and the high-pressure steam extraction of the steam turbine (23) is connected with the gasification furnace (5) in the solar proton extraction system; the low-pressure heater (26) is connected with low-pressure steam extraction of the steam turbine (23), and the low Wen Lengmei device (30) is correspondingly connected with an input port and an output port of the low-pressure heater (26) respectively; the steam turbine (23) is connected with a generator (24), the exhaust steam of the steam turbine is connected with a condenser (25), and the condenser (25) is connected with a low-pressure heater (26); the high-pressure heater (28) and the low-pressure heater (26) are connected through a water supply pump (27); the high-pressure heater (28) is connected in series with the boiler (22) and the steam turbine (23); the output port of the gasification furnace (5) is connected with a No. 1 gas-water heat exchanger (8) in the methanol synthesis subsystem, and the No. 1 gas-water heat exchanger (8) is connected with a steam turbine (23); the No. 1 gas-water heat exchanger (8) is connected with the CO converter (9) and the No. 2 gas-water heat exchanger (10); the No. 1 gas-water heat exchanger (8) is directly connected with the No. 3 gas-water heat exchanger (11) by bypassing the CO converter (9), and the No. 3 gas-water heat exchanger (11) is respectively connected with the No. 2 gas-water heat exchanger (10) and the output port of the high-pressure heater (28); the No. 3 gas-water heat exchanger (11) is also connected with the No. 5 gas-water heat exchanger (12), the purifying device (13), the gas compressor (14), the gas-gas heat exchanger (15) and the methanol synthesizer (16) in series; wherein, the No. 5 gas-water heat exchanger (12) is respectively connected with an input port and an output port of the low-pressure heater (26); the No. 4 gas-water heat exchanger (17) is also connected with an input port of the high-pressure heater (28); the compressor (14) is also connected in series with the gas-gas heat exchanger (15), the gas-liquid heat exchanger (20) and the gas-liquid separation device (19); the cooler (18) is respectively connected with the gas-liquid heat exchanger (20) and the gas-liquid separation device (19); the output end of the gas-liquid heat exchanger (20) is connected with a methanol purifier (21).
2. The integrated solar-powered coal-based methanol synthesis and cogeneration system of claim 1, wherein the solar energy is projected onto a reflector (7) by heliostats (6) and then concentrated into a gasifier (5).
3. An integrated co-production method of an integrated solar energy coal-based methanol synthesis and power generation co-production system as claimed in claim 1, which is characterized in that raw coal is crushed by a coal crusher (1), enters a pre-drying device (2) for drying, part of raw coal enters a boiler (22) for burning, the rest of raw coal enters a pyrolysis furnace (3) for low-temperature pyrolysis reaction, part of generated high-temperature upgraded coal enters a coal-fired power generation subsystem, is cooled by a high Wen Lengmei device (29) and a low-temperature Leng Meiqi (30), and then enters a compression molding device (31) for compression molding, so that upgraded coal which is convenient to transport is produced; the rest high-temperature upgraded coal and other pyrolysis products enter a gasification furnace (5), and are subjected to gasification reaction with high-pressure extraction steam from a steam turbine (23) to generate synthesis gas and gasification slag, the gasification slag enters a boiler (22) for combustion, the synthesis gas enters a methanol synthesis subsystem, the temperature of the synthesis gas is reduced through a No. 1 gas-water heat exchanger (8), and a part of the synthesis gas enters a CO converter (9) for regulating H 2 Mixing the mixed gas with the CO proportionality coefficient and the rest of the synthesis gas, sequentially passing through a No. 3 gas-water heat exchanger (11) and a No. 5 gas-water heat exchanger (12), and enabling the cooled synthesis gas to enter a purification device (13) to remove impurity gas: mixing sulfur and carbon dioxide, introducing the purified synthesis gas and the recycle gas separated by the gas-liquid separation device (19) into a gas compressor (14) for pressurization, preheating by a gas-gas heat exchanger (15), introducing into a methanol synthesizer (16) for methanol synthesis, introducing the generated mixed gas of methanol and synthesis gas into the gas-gas heat exchanger (15), the gas-liquid heat exchanger (20) and a cooler (18) in sequence, and introducing the cooled gas-liquid mixture into the gas-liquid separator(19) Part of the separated synthesis gas is used as circulating gas, mixed with the synthesis gas at the outlet of the purification device (13), and the rest of the synthesis gas is used as unreacted gas to enter a boiler (22) for combustion; the separated crude methanol is heated by a gas-liquid heat exchanger (20) and enters a methanol purifier (21) to produce high-purity methanol; in the solar proton extraction system, a part of solar energy heats heat conduction oil through a groove type heat collector (4), and enters a pyrolysis furnace (3) to provide heat for the pyrolysis process; a part of solar energy is projected onto a reflector (7) through a heliostat (6) and then is concentrated into a gasification furnace (5) to provide heat for the gasification process; in a coal-fired power generation subsystem, gasified slag, unreacted gas and pre-dried coal are used as fuel to enter a boiler (22) for combustion, water supply is heated, generated high-temperature steam is mixed with high-pressure steam from a gas-water heat exchanger (8) and enters a steam turbine (23), a generator (24) is driven to generate power, generated exhaust steam enters a condenser (25) for cooling the upgraded coal, a part of the produced exhaust steam enters a low-temperature Leng Meiqi (30) for cooling the upgraded coal, a part of the condensed water is split A and enters a gas-water heat exchanger (12) for cooling synthetic gas to form a high-temperature condensed water split B, the rest of the condensed water enters a low-pressure heater (26) for being heated by low-pressure steam extraction from the steam turbine (23), then the three are mixed and enter a water supply pump (27) for pressurization, a part of the generated high-pressure water enters a high-pressure heater (28) for being heated by high-pressure steam extraction from the steam turbine (23), a part of the generated high-pressure water enters a high-Wen Lengmei heater (29) for cooling the upgraded coal, the rest of the low-temperature upgraded water split C enters a gas-water heat exchanger (17) for cooling the upgraded coal, the reaction heat of the methanol synthesis process is absorbed, and then enters a gas-water exchanger (11) for generating sensible heat by the high-temperature water, and a high-temperature water heat exchange gas (2) for the high-temperature exchange of the high-pressure heat exchanger (2) is generated by the high-pressure water, and the high-pressure water heat exchanger (11) for the sensible heat of the high-temperature water), and the high-temperature water is mixed gas generated by the high-pressure water, and the high-pressure water gas, and the high-pressure heat steam is mixed gas generated by the high-pressure heat steam and the high-pressure heat steam heat exchanger (2; the rest of high-temperature water split stream D generated by the No. 3 gas-water heat exchanger (11) is mixed with high-temperature water at the outlets of the high-pressure Wen Lengmei device (29) and the high-pressure heater (28) and enters the boiler (22) as feed water.
4. The integrated co-production method of the integrated solar energy-based methanol synthesis and power generation co-production system according to claim 3, wherein unreacted gas separated by a gasification slag and gas-liquid separator (19) generated by the gasification furnace (5) and a part of pre-dried coal at the outlet of the pre-drying device (2) enter a boiler (22) together to be combusted, and the feed water is heated.
5. The integrated co-production method of the integrated solar energy-based methanol synthesis and power generation co-production system according to claim 3, wherein high temperature upgraded coal produced by the pyrolysis furnace (3) is partially fed into the gasification furnace (5) for gasification reaction to produce synthesis gas; the rest of the coal-fired coal is fed into a coal-fired power generation subsystem, cooled by a high Wen Lengmei device (29) and a low temperature Leng Meiqi (30), and then fed into a compression molding device (31) for compression molding, so that the quality-improved lump coal which is convenient to transport is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810380479.4A CN108442982B (en) | 2018-04-25 | 2018-04-25 | Solar integrated coal-based methanol synthesis and power generation co-production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810380479.4A CN108442982B (en) | 2018-04-25 | 2018-04-25 | Solar integrated coal-based methanol synthesis and power generation co-production system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108442982A CN108442982A (en) | 2018-08-24 |
| CN108442982B true CN108442982B (en) | 2023-08-29 |
Family
ID=63201061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810380479.4A Active CN108442982B (en) | 2018-04-25 | 2018-04-25 | Solar integrated coal-based methanol synthesis and power generation co-production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108442982B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110847991A (en) * | 2019-11-20 | 2020-02-28 | 西安交通大学 | Solar-driven lignite poly-generation power generation system and operation method |
| CN111140359A (en) * | 2019-12-16 | 2020-05-12 | 华北电力大学 | Solar-driven coal gasification methanol synthesis and zero-emission power generation co-production system |
| CN118391105A (en) * | 2024-01-19 | 2024-07-26 | 淮阴工学院 | Coupled oxygen-enriched combustion power generation and CO2Novel electro-chemical co-production system for catalytic hydrogenation process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4608818A (en) * | 1983-05-31 | 1986-09-02 | Kraftwerk Union Aktiengesellschaft | Medium-load power-generating plant with integrated coal gasification plant |
| US4631915A (en) * | 1984-04-21 | 1986-12-30 | Kraftwerk Union Aktiengesellschaft | Gas turbine and steam power-generating plant with integrated coal gasification plant |
| CN101511724A (en) * | 2006-09-29 | 2009-08-19 | 凯洛格·布朗及鲁特有限公司 | Methods for producing synthesis gas |
| CN103899371A (en) * | 2014-03-17 | 2014-07-02 | 中国科学院工程热物理研究所 | Poly-generation system using biomass and solar energy for making methyl alcohol and generating power |
| CN107446600A (en) * | 2017-09-11 | 2017-12-08 | 北京华福工程有限公司 | Middle low-order coal multi-production comprehensive utilization device and comprehensive utilization device |
| CN208310851U (en) * | 2018-04-25 | 2019-01-01 | 华北电力大学 | A kind of the coal-based methanol synthesis and power generating simultaneously system of integrated solar |
-
2018
- 2018-04-25 CN CN201810380479.4A patent/CN108442982B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4608818A (en) * | 1983-05-31 | 1986-09-02 | Kraftwerk Union Aktiengesellschaft | Medium-load power-generating plant with integrated coal gasification plant |
| US4631915A (en) * | 1984-04-21 | 1986-12-30 | Kraftwerk Union Aktiengesellschaft | Gas turbine and steam power-generating plant with integrated coal gasification plant |
| CN101511724A (en) * | 2006-09-29 | 2009-08-19 | 凯洛格·布朗及鲁特有限公司 | Methods for producing synthesis gas |
| CN103899371A (en) * | 2014-03-17 | 2014-07-02 | 中国科学院工程热物理研究所 | Poly-generation system using biomass and solar energy for making methyl alcohol and generating power |
| CN107446600A (en) * | 2017-09-11 | 2017-12-08 | 北京华福工程有限公司 | Middle low-order coal multi-production comprehensive utilization device and comprehensive utilization device |
| CN208310851U (en) * | 2018-04-25 | 2019-01-01 | 华北电力大学 | A kind of the coal-based methanol synthesis and power generating simultaneously system of integrated solar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108442982A (en) | 2018-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102660339B (en) | Gas-steam efficient cogeneration process and system based on biomass gasification and methanation | |
| CN108439336B (en) | Zero-emission hydrogen electric cogeneration system | |
| CN102850172B (en) | Coal chemical poly-generation process and system | |
| CN113090349B (en) | Photo-thermal type coal supercritical water gasification hydrogen-heat-power cogeneration system and working method | |
| CN108442982B (en) | Solar integrated coal-based methanol synthesis and power generation co-production system | |
| CN113046134A (en) | Combined cooling, heating and power generation system and method based on dual fluidized bed gasification and fuel cell | |
| CN109181776B (en) | Coal-based poly-generation system and method for integrated fuel cell power generation | |
| CN111171875A (en) | Energy cascade utilization system and method for supercritical water gasification hydrogen production process | |
| CN101993730B (en) | Multifunctional energy system based on appropriate conversion of chemical energy of fossil fuel | |
| CN105062526A (en) | Coal pyrolysis gasification poly-generation system and pyrolysis gasification method thereof | |
| CN114655923B (en) | System and method for cogeneration of hydrogen and electricity of coal-fired boiler | |
| CN113882955A (en) | Gas turbine reheating combined cycle power generation system and operation method thereof | |
| CN111140359A (en) | Solar-driven coal gasification methanol synthesis and zero-emission power generation co-production system | |
| 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 | |
| CN109350988B (en) | CO (carbon monoxide) 2 IGFC power generation system and method with liquefaction process and cryogenic air separation coupling | |
| CN116814300A (en) | System for preparing green methanol by high-efficiency biomass gasification | |
| CN208310851U (en) | A kind of the coal-based methanol synthesis and power generating simultaneously system of integrated solar | |
| CN216198494U (en) | Novel gas turbine reheating combined cycle power generation device | |
| CN205046051U (en) | Circulating gaseous heat carrier pyrolysis of coal system | |
| CN210951245U (en) | Boiler steam pyrolysis coal system of thermal power plant | |
| CN211896822U (en) | Energy cascade utilization system for supercritical water gasification hydrogen production process | |
| CN210765154U (en) | System for coal pyrolysis gas power generation of thermal power plant | |
| CN210367563U (en) | Integrated coal gasification fuel cell power generation system adopting coal water slurry gasification | |
| CN108410512B (en) | Solar energy gasification comprehensive utilization system based on all-weather solar energy gasification reactor |
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 |