CN215292691U - Biomass gasification power generation system coupled with coal-fired power plant - Google Patents
Biomass gasification power generation system coupled with coal-fired power plant Download PDFInfo
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- CN215292691U CN215292691U CN202023066820.0U CN202023066820U CN215292691U CN 215292691 U CN215292691 U CN 215292691U CN 202023066820 U CN202023066820 U CN 202023066820U CN 215292691 U CN215292691 U CN 215292691U
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Abstract
The utility model relates to a biomass gasification power generation system with coal fired power plant coupling, this system mainly include five parts, coal fired power generation system, biomass gasification system, high temperature fuel cell system, gas turbine system and supercritical carbon dioxide circulation system. The biomass is pyrolyzed and gasified in a biomass gasification furnace, and the obtained synthesis gas is purified and then used as fuel of a high-temperature fuel cell. After the electrochemical reaction in the high-temperature fuel cell is finished, the flue gas which is not completely burnt out at the anode outlet is mixed with the cathode outlet gas and then enters the combustion chamber for combustion. The high-temperature flue gas at the outlet of the combustion chamber firstly pushes the gas turbine to do work, then is used as a high-temperature heat source of the supercritical carbon dioxide circulating system, is used for heating the feed water of the coal-fired power generation system, and is finally mixed with the flue gas at the outlet of the coal-fired boiler obtained through treatment and then is discharged through a chimney. Wherein, coal fired power generation system's condensate water is as supercritical carbon dioxide circulation system's cold source, through the utility model discloses, can realize solid waste and coal-fired high-efficient resource utilization.
Description
Technical Field
The utility model belongs to renewable energy, pyrolysis gasification and carbon dioxide circulation field, in particular to biomass gasification power generation system, concretely relates to biomass gasification power generation system with coal fired power plant coupling.
Background
Compared with other technologies, the biomass thermal conversion technology has the advantages of low power consumption, high conversion rate, high conversion strength, easy industrialization and the like, and has become a key research direction for developing and utilizing biomass energy in various countries in the world, wherein the gasification and liquefaction technology is a main form of biomass thermal utilization. The biomass gasification reaction temperature is low, and the operation problems of ash slagging, agglomeration and the like in the fuel combustion process can be avoided. Therefore, the gasification technology is very suitable for the conversion and utilization of biomass energy. The high-grade fuel gas generated by biomass gasification can be directly used for production and life, can also be used for synthesizing natural gas and the like, but the utilization efficiency of the synthesis gas generated by biomass gasification still has the potential of improvement.
The prior art indicates that the synthesis gas generated by biomass gasification can generate electricity through an internal combustion engine or a gas turbine to carry out cogeneration, or the synthesis gas generated after gasification is directly introduced into a coal-fired boiler to be combusted, but the above scheme has limited utilization efficiency of the biomass synthesis gas, and the utilization efficiency of the biomass synthesis gas has a certain promotion space.
The invention provides a biomass gasification system coupled with a coal-fired power station, aiming at the problem of how to more efficiently utilize biomass gasification synthesis gas. Specifically, the synthesis gas generated after biomass gasification is purified and then enters a high-temperature fuel cell as fuel, the high-temperature fuel cell generates electricity through electrochemical reaction, and the energy conversion efficiency is not limited by Carnot cycle and can reach 60% -80% theoretically. The flue gas with high-grade waste heat at the outlet of the high-temperature fuel cell system sequentially passes through the gas turbine system, the supercritical carbon dioxide circulating system and the coal-fired power generation system for heat recovery, and the high-temperature flue gas is distributed and utilized according to the energy grade of the high-temperature flue gas in the coupling mode, so that the cascade utilization of energy is realized, and the utilization efficiency of the energy is improved to a great extent. Meanwhile, the condensed water of the coal-fired power generation system can be used as a cold source of the supercritical carbon dioxide circulating system, and various energy integration of the system is realized. Moreover, the flue gas at the outlet of the high-temperature fuel cell system is discharged to the atmosphere by using a chimney of the coal-fired power generation system, so that the equipment investment and the occupied area are reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a biomass gasification power generation system with coal fired power plant coupling, this system mainly include five parts, coal fired power generation system, biomass gasification system, high temperature fuel cell system, gas turbine system and supercritical carbon dioxide circulation system. The biomass enters a biomass gasification system for treatment, the produced synthesis gas is purified to be used as anode reaction gas of the high-temperature fuel cell, and air at the outlet of a gas compressor of a gas turbine system is used as cathode reaction gas of the high-temperature fuel cell. After the electrochemical reaction in the high-temperature fuel cell is finished, the reaction gas which is not completely burnt out at the outlet of the anode and the gas at the outlet of the cathode are mixed and then enter the combustion chamber for combustion. The high-temperature flue gas at the outlet of the combustion chamber firstly enters a gas turbine to push the gas turbine to do work, then is used as a high-temperature heat source of a supercritical carbon dioxide circulating system, is used for heating the feed water of a coal-fired power generation system, and is finally mixed with the flue gas at the outlet of the coal-fired boiler obtained through treatment and then is discharged through a chimney. The condensed water of the coal-fired power generation system is used as a cold source of the supercritical carbon dioxide circulating system and is used for maintaining the normal operation of the supercritical carbon dioxide circulating system. Meanwhile, the temperature of the condensed water returning to the coal-fired power generation system is also improved, the steam extraction quantity of a steam turbine for heating the condensed water is reduced, and the generated energy of the coal-fired power generation system is increased.
The utility model discloses a realize that the technical scheme who takes of its technical purpose does:
a biomass gasification power generation system coupled with a coal-fired power plant is characterized by mainly comprising five parts, namely a coal-fired power generation system, a biomass gasification system, a high-temperature fuel cell system, a gas turbine system and a supercritical carbon dioxide circulating system;
the coal-fired power generation system comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a coal-fired power generation system generator, a condenser, a condensate pump, a 8# low-pressure heater, a 7# low-pressure heater, a 6# low-pressure heater, a 5# low-pressure heater, a deaerator, a feed water pump, a 3# high-pressure heater, a 2# high-pressure heater, a 1# high-pressure heater, an electrostatic dust collector, a desulfurizing tower and a chimney;
the biomass gasification system comprises a biomass gasification furnace and a purification system;
the high-temperature fuel cell system comprises a high-temperature fuel cell and a combustion chamber;
the gas turbine system comprises a gas compressor of the gas turbine system, a turbine of the gas turbine system and a generator of the gas turbine system;
the supercritical carbon dioxide circulating system comprises a carbon dioxide-water heat exchanger, a supercritical carbon dioxide circulating system compressor, a heat regenerator, a flue gas-carbon dioxide heat exchanger, a supercritical carbon dioxide circulating system turbine, a supercritical carbon dioxide circulating system generator, a high-temperature flue gas-water heat exchanger and a low-temperature flue gas-water heat exchanger.
Further, the high-pressure turbine cylinder, the intermediate-pressure turbine cylinder and the low-pressure turbine cylinder are coaxially connected to drag a generator of the coal-fired power generation system to generate power, an superheated steam outlet of the boiler is connected with an inlet of the high-pressure turbine cylinder, an outlet of the high-pressure turbine cylinder is communicated to a reheater of the boiler, an outlet of the reheater of the boiler is connected to the intermediate-pressure turbine cylinder, and the intermediate-pressure turbine cylinder, the low-pressure turbine cylinder and the condenser are sequentially connected; an outlet pipeline of a condenser water tank is sequentially communicated with an 8# low-pressure heater, a 7# low-pressure heater, a 6# low-pressure heater, a 5# low-pressure heater, a deaerator, a water feeding pump, a 3# high-pressure heater, a 2# high-pressure heater and a 1# high-pressure heater through a condensate pump; the 8# low-pressure heater, the 7# low-pressure heater, the 6# low-pressure heater and the 5# low-pressure heater use steam extracted from a low-pressure cylinder of a steam turbine as a heat source, the deaerator and the 3# high-pressure heater use steam extracted from a medium-pressure cylinder of the steam turbine as a heat source, the 2# high-pressure heater and the 1# high-pressure heater use steam extracted from the low-pressure cylinder of the steam turbine as a heat source, and water delivered by the heaters at all levels automatically flows step by step and is respectively collected to a deaerator a condenser water tank.
Furthermore, the outlet of the condensate pump of the coal-fired power generation system is divided into two paths, one path is connected with the inlet of the 8# low-pressure heater, and the other path is connected with the outlet of the 8# low-pressure heater through the cold end of the carbon dioxide-water heat exchanger; the outlet of the No. 8 low-pressure heater is divided into two paths, one path is connected with the inlet of the No. 7 low-pressure heater, and the other path is connected with the outlet of the No. 5 low-pressure heater through the cold end of the low-temperature flue gas-water heat exchanger; the outlet of the water supply pump is divided into two paths, one path is connected with the inlet of a No. 3 high-pressure heater, and the other path is connected with the outlet of a No. 1 high-pressure heater through the cold end of a high-temperature flue gas-water heat exchanger.
Furthermore, a biomass feeding pipeline is connected with a biomass gasification furnace, crude synthesis gas formed after pyrolysis and gasification of biomass enters a purification system for treatment, and an outlet of the purification system is connected with an anode inlet of the high-temperature fuel cell.
Further, an anode inlet of the fuel cell is connected with an outlet of the purification system, a cathode inlet of the fuel cell is connected with an outlet of a compressor of the gas turbine system, outlet gases of the anode and the cathode enter a combustion chamber to be combusted, and an outlet of the combustion chamber is connected with the turbine of the gas turbine system.
Further, a gas compressor of the gas turbine system and a turbine of the gas turbine system are coaxially connected to drive a generator of the gas turbine to generate electricity, an inlet of the gas compressor of the gas turbine system is connected with the atmospheric environment, an outlet of the gas compressor of the gas turbine system is connected with a cathode of a fuel cell, an outlet of a combustion chamber of the fuel cell system is connected with an inlet of the turbine of the gas turbine system, and exhaust gas at an outlet of the turbine of the gas turbine system enters an inlet of a hot end of the flue gas-carbon dioxide heat exchanger.
Further, the turbine outlet of the gas turbine system is connected with the hot end inlet of the flue gas-carbon dioxide heat exchanger, the hot end of the flue gas-carbon dioxide heat exchanger is connected with the high-temperature flue gas-water heat exchanger and the low-temperature flue gas-water heat exchanger in series, the hot end outlet of the low-temperature flue gas-water heat exchanger is connected with the outlet of the desulfurization tower of the coal-fired power generation system, and the flue gas-carbon dioxide heat exchanger and the desulfurization tower share a chimney with the coal-fired power generator set to be discharged to the atmospheric environment; the outlet of the cold end of the flue gas-carbon dioxide heat exchanger is connected with a supercritical carbon dioxide circulating system turbine, the supercritical carbon dioxide circulating system turbine drives a supercritical carbon dioxide circulating system generator to generate electricity, and the outlet of the supercritical carbon dioxide circulating system turbine is sequentially connected with a heat regenerator and the hot end of a carbon dioxide-water heat exchanger to respectively heat the carbon dioxide and the feed water of the coal-fired power generation system. The outlet of the carbon dioxide-water heat exchanger is connected with the cold end of the flue gas-carbon dioxide heat exchanger through a compressor and a heat regenerator of the supercritical carbon dioxide circulating system, so that the circulation of the supercritical carbon dioxide power generation system is completed.
Further, biomass enters a biomass gasification furnace, outlet synthesis gas enters a purification system for treatment, and the purified synthesis gas enters a high-temperature fuel cell anode. The compressor of the gas turbine system compresses air to a certain pressure and then sends the air to the cathode of the high-temperature fuel cell. After electrochemical reaction, the unburned flue gas at the anode outlet of the high-temperature fuel cell and the cathode outlet gas enter a combustion chamber for combustion, and the outlet flue gas enters a gas turbine system turbine to generate electricity through a gas turbine system generator. Flue gas at the turbine outlet of the gas turbine system enters a flue gas-carbon dioxide heat exchanger to heat carbon dioxide, and the flue gas is used as a high-temperature heat source of the supercritical carbon dioxide circulating system. The flue gas at the outlet of the flue gas-carbon dioxide heat exchanger sequentially enters the high-temperature flue gas-water heat exchanger and the low-temperature flue gas-water heat exchanger to heat the feed water of the coal-fired power generation system in a segmented manner, and then is mixed with the flue gas treated by the electrostatic precipitator and the desulfurization tower at the outlet of the coal-fired boiler, and then is discharged to the atmosphere through a chimney.
Further, carbon dioxide at the outlet of the flue gas-carbon dioxide heat exchanger enters a supercritical carbon dioxide circulating system turbine to generate power through a supercritical carbon dioxide circulating system generator. Carbon dioxide at the turbine outlet of the supercritical carbon dioxide circulating system sequentially enters a heat regenerator and a carbon dioxide-water heat exchanger to respectively heat the carbon dioxide and the feed water of the coal-fired power generation system, and then the carbon dioxide is compressed to a certain pressure by a compressor of the supercritical carbon dioxide circulating system and then sequentially enters the heat regenerator and a flue gas-carbon dioxide heat exchanger to absorb heat, so that the circulation of the supercritical carbon dioxide power generation system is completed.
Furthermore, superheated steam at the outlet of the coal-fired boiler enters a high-pressure cylinder of a steam turbine to do work, the outlet steam enters the coal-fired boiler to be reheated, and the outlet steam sequentially passes through a medium-pressure cylinder of the steam turbine and a low-pressure cylinder of the steam turbine to do work through expansion, so that a generator of a coal-fired power generation system is driven to generate power; the method comprises the following steps that steam discharged by a low-pressure cylinder of a steam turbine enters a condenser for condensation, condensed water at an outlet is pressurized by a condensed water pump and then is divided into two paths, one path of the condensed water flows through a No. 8 low-pressure heater to absorb heat, the other path of the condensed water flows through a carbon dioxide-water heat exchanger to absorb heat, the two paths of the condensed water are mixed and then divided into two paths, the other path of the condensed water sequentially flows through a No. 7 low-pressure heater, a No. 6 low-pressure heater and a No. 5 low-pressure heater to absorb heat, steam extracted by the low-pressure cylinder of the steam turbine serves as a heat source of the low-pressure heater, the other path of the condensed water flows through a low-temperature flue gas-water heat exchanger to absorb heat, the two paths of the condensed water are mixed and then enter a deaerator, and steam extracted by a medium-pressure cylinder of the steam turbine serves as a heat source of the deaerator; the water supply at the outlet of the deaerator is pressurized by a water supply pump and then divided into two paths, wherein one path of water sequentially flows through a 3# high-pressure heater, a 2# high-pressure heater and a 1# high-pressure heater to absorb heat, the other path of water sequentially flows through a high-temperature flue gas-water heat exchanger to absorb heat, the two paths of water supply are mixed and then enter the coal-fired boiler, the steam extracted by a steam turbine intermediate pressure cylinder is used as a heat source of the 3# high-pressure heater, the steam exhausted by the steam turbine high-pressure cylinder is used as a heat source of the 2# high-pressure heater, and the steam extracted by the steam turbine high-pressure cylinder is used as a heat source of the 1# high-pressure heater.
Compared with the prior art, the utility model discloses a its beneficial effect of biomass gasification system with coal fired power plant coupling: firstly, the synthesis gas generated after biomass gasification is purified and then enters a high-temperature fuel cell as fuel, the high-temperature fuel cell generates electricity through electrochemical reaction, the energy conversion efficiency is not limited by Carnot cycle, and theoretically can be as high as 60-80%. (ii) a Secondly, high-grade waste heat at the outlet of the high-temperature fuel cell system smoke sequentially passes through the gas turbine system, the supercritical carbon dioxide circulating system and the coal-fired power generation system for heat recovery, and the high-grade waste heat is distributed and utilized according to the energy grade of the high-temperature smoke, so that the cascade utilization of energy is realized, and the utilization efficiency of the energy is improved to a great extent. (ii) a Thirdly, the condensed water of the coal-fired power generation system can be used as a cold source of the supercritical carbon dioxide circulating system, and the integration of various energies of the system is realized. Moreover, the flue gas at the outlet of the high-temperature fuel cell system is discharged to the atmosphere by using a chimney of the coal-fired power generation system, so that the equipment investment and the occupied area are reduced.
Drawings
FIG. 1 is a biomass gasification power generation system coupled to a coal-fired power plant.
Wherein: 1-a coal-fired boiler; 2-high pressure cylinder of steam turbine; 3-a steam turbine intermediate pressure cylinder; 4-low pressure cylinder of steam turbine; 5-a coal-fired power generation system generator; 6-a condenser; 7-a condensate pump; 8-8# Low pressure Heater; 9-7# Low pressure Heater; 10-6# Low pressure Heater; 11-5# Low pressure Heater; 12-a deaerator; 13-a feed pump; 14-3# high pressure heater; 15-2# high pressure heater; 16-1# high pressure heater; 17-an electrostatic precipitator; 18-a desulfurization tower; 19-a chimney; 20-a biomass gasifier; 21-a purification system; 22-high temperature fuel cell; 23-a combustion chamber; 24-a gas turbine system compressor; 25-a gas turbine system turbine; 26-a gas turbine system generator; 27-carbon dioxide-water heat exchanger; 28-supercritical carbon dioxide recycle system compressor; 29-a heat regenerator; 30-flue gas-carbon dioxide heat exchanger; 31-a supercritical carbon dioxide recycle system turbine; 32-supercritical carbon dioxide circulation system generator; 33-high temperature flue gas-water heat exchanger; 34-low temperature flue gas-water heat exchanger
Detailed Description
The utility model provides a biomass gasification power generation system coupled with a coal-fired power plant, which is explained with the accompanying drawings and examples.
A biomass gasification power generation system coupled with a coal-fired power plant as shown in fig. 1, which is characterized by mainly comprising five parts, a coal-fired power generation system, a biomass gasification system, a high-temperature fuel cell system, a gas turbine system and a supercritical carbon dioxide circulation system; the coal-fired power generation system comprises a boiler 1, a steam turbine high-pressure cylinder 2, a steam turbine intermediate-pressure cylinder 3, a steam turbine low-pressure cylinder 4, a coal-fired power generation system generator 5, a condenser 6, a condensate pump 7, a 8# low-pressure heater 8, a 7# low-pressure heater 9, a 6# low-pressure heater 10, a 5# low-pressure heater 11, a deaerator 12, a water feed pump 13, a 3# high-pressure heater 14, a 2# high-pressure heater 15, a 1# high-pressure heater 16, an electrostatic dust collector 17, a desulfurizing tower 18 and a chimney 19; the biomass gasification system comprises a biomass gasification furnace 20 and a purification system 21; the high-temperature fuel cell system comprises a high-temperature fuel cell 22 and a combustion chamber 23; the gas turbine system comprises a gas turbine system compressor 24, a gas turbine system turbine 25 and a gas turbine system generator 26; the supercritical carbon dioxide circulating system comprises a carbon dioxide-water heat exchanger 27, a supercritical carbon dioxide circulating system compressor 28, a heat regenerator 29, a flue gas-carbon dioxide heat exchanger 30, a supercritical carbon dioxide circulating system turbine 31, a supercritical carbon dioxide circulating system generator 32, a high-temperature flue gas-water heat exchanger 33 and a low-temperature flue gas-water heat exchanger 34.
Specifically, the biomass enters a biomass gasification furnace 20, the outlet synthesis gas enters a purification system 21 for treatment, and the purified synthesis gas enters the anode of a high-temperature fuel cell 22. The gas turbine system compressor 24 compresses air to a certain pressure and then sends the air to the cathode of the high-temperature fuel cell 22. After the electrochemical reaction, the unburned flue gas at the anode outlet of the high-temperature fuel cell 22 and the cathode outlet gas enter the combustion chamber 23 for combustion, and the outlet flue gas enters the gas turbine system turbine 25 to generate electricity through the gas turbine system generator 26. The flue gas at the outlet of the turbine 25 of the gas turbine system enters a flue gas-carbon dioxide heat exchanger 30 to heat carbon dioxide, and the flue gas is used as a high-temperature heat source of the supercritical carbon dioxide circulating system. The flue gas at the outlet of the flue gas-carbon dioxide heat exchanger 30 sequentially enters the high-temperature flue gas-water heat exchanger 33 and the low-temperature flue gas-water heat exchanger 34 to heat the feed water of the coal-fired power generation system in a segmented manner, and then is mixed with the flue gas treated by the electrostatic precipitator 17 and the desulfurizing tower 18 at the outlet of the coal-fired boiler 1, and then is discharged to the atmosphere through the chimney 19.
Specifically, the carbon dioxide at the outlet of the flue gas-carbon dioxide heat exchanger 30 enters a supercritical carbon dioxide circulation system turbine 31, and is generated by a supercritical carbon dioxide circulation system generator 32. Carbon dioxide at the outlet of the supercritical carbon dioxide circulating system turbine 31 sequentially enters the heat regenerator 29 and the carbon dioxide-water heat exchanger 27 to heat the carbon dioxide and the feed water of the coal-fired power generation system respectively, and then the carbon dioxide is compressed to a certain pressure by the supercritical carbon dioxide circulating system compressor 28 and then sequentially enters the heat regenerator 29 and the flue gas-carbon dioxide heat exchanger 30 to absorb heat, so that the circulation of the supercritical carbon dioxide power generation system is completed.
Specifically, superheated steam at the outlet of the coal-fired boiler 1 enters a steam turbine high-pressure cylinder 2 to do work, the outlet steam enters the coal-fired boiler 1 to be reheated, and the outlet steam sequentially passes through a steam turbine medium-pressure cylinder 3 and a steam turbine low-pressure cylinder 4 to expand to do work to drive a coal-fired power generation system generator 5 to generate power; the exhaust steam of the low-pressure turbine cylinder 4 enters a condenser 6 for condensation, the condensed water at the outlet is pressurized by a condensed water pump 7 and then divided into two paths, one path of the condensed water absorbs heat by flowing through a No. 8 low-pressure heater 8, the other path of the condensed water absorbs heat by flowing through a carbon dioxide-water heat exchanger 27, the two paths of the condensed water are mixed and then divided into two paths, one path of the condensed water sequentially absorbs heat by flowing through a No. 7 low-pressure heater 9, a No. 6 low-pressure heater 10 and a No. 5 low-pressure heater 11, the steam of the low-pressure turbine cylinder 4 is taken as a heat source of the low-pressure heater, the other path of the condensed water absorbs heat by flowing through a low-temperature flue gas-water heat exchanger 34, the two paths of the condensed water are mixed and then enter a deaerator 12, and the steam of the medium-pressure turbine cylinder 3 is taken as a heat source of the deaerator 12; the water supply at the outlet of the deaerator 12 is pressurized by a water supply pump 13 and then divided into two paths, one path of the water supply sequentially flows through a 3# high-pressure heater 14, a 2# high-pressure heater 15 and a 1# high-pressure heater 16 to absorb heat, the other path of the water supply flows through a high-temperature flue gas-water heat exchanger 33 to absorb heat, the two paths of water supply are mixed and then enter the coal-fired boiler 1, the steam extracted by the steam turbine intermediate pressure cylinder 3 is used as a heat source of the 3# high-pressure heater 14, the steam exhausted by the steam turbine high pressure cylinder 2 is used as a heat source of the 2# high-pressure heater 15, and the steam extracted by the steam turbine high pressure cylinder 2 is used as a heat source of the 1# high-pressure heater 16.
In addition, it should be noted that the shapes, names, and the like of the components of the embodiments described in the present specification may be different. All equivalent or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A biomass gasification power generation system coupled with a coal-fired power plant is characterized by mainly comprising five parts, namely a coal-fired power generation system, a biomass gasification system, a high-temperature fuel cell system, a gas turbine system and a supercritical carbon dioxide circulating system;
the coal-fired power generation system comprises a boiler (1), a steam turbine high-pressure cylinder (2), a steam turbine intermediate-pressure cylinder (3), a steam turbine low-pressure cylinder (4), a coal-fired power generation system generator (5), a condenser (6), a condensate pump (7), an 8# low-pressure heater (8), a 7# low-pressure heater (9), a 6# low-pressure heater (10), a 5# low-pressure heater (11), a deaerator (12), a water feed pump (13), a 3# high-pressure heater (14), a 2# high-pressure heater (15), a 1# high-pressure heater (16), an electrostatic dust collector (17), a desulfurizing tower (18) and a chimney (19);
the biomass gasification system comprises a biomass gasification furnace (20) and a purification system (21);
the high-temperature fuel cell system comprises a high-temperature fuel cell (22) and a combustion chamber (23);
the gas turbine system comprises a gas turbine system compressor (24), a gas turbine system turbine (25) and a gas turbine system generator (26);
the supercritical carbon dioxide circulating system comprises a carbon dioxide-water heat exchanger (27), a supercritical carbon dioxide circulating system compressor (28), a heat regenerator (29), a flue gas-carbon dioxide heat exchanger (30), a supercritical carbon dioxide circulating system turbine (31), a supercritical carbon dioxide circulating system generator (32), a high-temperature flue gas-water heat exchanger (33) and a low-temperature flue gas-water heat exchanger (34).
2. The system of claim 1, wherein the power generation system comprises: the system comprises a steam turbine high-pressure cylinder (2), a steam turbine intermediate-pressure cylinder (3) and a steam turbine low-pressure cylinder (4) which are coaxially connected, and used for dragging a coal-fired power generation system generator (5) to generate power, wherein an superheated steam outlet of a boiler (1) is connected with an inlet of the steam turbine high-pressure cylinder (2), an outlet of the steam turbine high-pressure cylinder (2) is communicated to a reheater of the boiler (1), an outlet of the reheater of the boiler (1) is connected to the steam turbine intermediate-pressure cylinder (3), and the steam turbine intermediate-pressure cylinder (3), the steam turbine low-pressure cylinder (4) and a condenser (6) are sequentially connected; an outlet pipeline of a water tank of the condenser (6) is sequentially communicated with an 8# low-pressure heater (8), a 7# low-pressure heater (9), a 6# low-pressure heater (10), a 5# low-pressure heater (11), a deaerator (12), a water feeding pump (13), a 3# high-pressure heater (14), a 2# high-pressure heater (15) and a 1# high-pressure heater (16) through a condensate pump (7); 8# low pressure heater (8), 7# low pressure heater (9), 6# low pressure heater (10), 5# low pressure heater (11) regard steam extraction of steam turbine low pressure jar (4) as the heat source, deaerator (12) and 3# high pressure heater (14) regard steam extraction of steam turbine intermediate pressure jar (3) as the heat source, 2# high pressure heater (15), 1# high pressure heater (16) regard steam extraction of steam turbine low pressure jar (4) as the heat source, the heater water delivery of each grade flows by oneself step, collect to deaerator (12), condenser (6) water tank respectively.
3. The system of claim 1, wherein the power generation system comprises: the outlet of a condensate pump (7) of the coal-fired power generation system is divided into two paths, one path is connected with the inlet of the 8# low-pressure heater (8), and the other path is connected with the outlet of the 8# low-pressure heater (8) through the cold end of a carbon dioxide-water heat exchanger (27); the outlet of the 8# low-pressure heater (8) is divided into two paths, one path is connected with the inlet of the 7# low-pressure heater (9), and the other path is connected with the outlet of the 5# low-pressure heater (11) through the cold end of the low-temperature flue gas-water heat exchanger (34); the outlet of the feed pump (13) is divided into two paths, one path is connected with the inlet of a 3# high-pressure heater (14), and the other path is connected with the outlet of a 1# high-pressure heater (16) through the cold end of a high-temperature flue gas-water heat exchanger (33).
4. The system of claim 1, wherein the power generation system comprises: the biomass feeding pipeline is connected with the biomass gasification furnace (20), crude synthesis gas formed after biomass pyrolysis gasification enters the purification system (21) for treatment, and the outlet of the purification system (21) is connected with the anode inlet of the high-temperature fuel cell (22).
5. The system of claim 1, wherein the power generation system comprises: an anode inlet of the high-temperature fuel cell (22) is connected with an outlet of the purification system (21), a cathode inlet is connected with an outlet of a compressor (24) of the gas turbine system, outlet gases of the anode and the cathode enter a combustion chamber (23) to be combusted, and an outlet of the combustion chamber is connected with a turbine (25) of the gas turbine system.
6. The system of claim 1, wherein the power generation system comprises: a gas compressor (24) of a gas turbine system is coaxially connected with a turbine (25) of the gas turbine system to drive a generator (26) of the gas turbine system to generate electricity, an inlet of the gas compressor (24) of the gas turbine system is connected with the atmospheric environment, an outlet of the gas compressor of the gas turbine system is connected with a cathode of a high-temperature fuel cell (22), an outlet of a combustion chamber (23) of the fuel cell system is connected with an inlet of the turbine (25) of the gas turbine system, and exhaust gas at an outlet of the turbine (25) of the gas turbine system enters a hot end inlet of a flue gas-carbon dioxide heat exchanger (30).
7. The system of claim 1, wherein the power generation system comprises: the outlet of a turbine (25) of the gas turbine system is connected with the inlet of the hot end of a flue gas-carbon dioxide heat exchanger (30), the hot end of the flue gas-carbon dioxide heat exchanger (30) is connected with a high-temperature flue gas-water heat exchanger (33) and a low-temperature flue gas-water heat exchanger (34) in series, the outlet of the hot end of the low-temperature flue gas-water heat exchanger (34) is connected with the outlet of a desulfurization tower (18) of a coal-fired power generation system, and the flue gas-water heat exchanger and a shared chimney (19) of a coal-fired power generating set are discharged to the atmospheric environment; the outlet of the cold end of the flue gas-carbon dioxide heat exchanger (30) is connected with a turbine (31) of a supercritical carbon dioxide circulating system, the turbine drives a generator (32) of the supercritical carbon dioxide circulating system to generate electricity, the outlet of the turbine is sequentially connected with a heat regenerator (29) and the hot end of a carbon dioxide-water heat exchanger (27) to respectively heat the carbon dioxide and the feed water of the coal-fired power generation system; the outlet of the carbon dioxide-water heat exchanger (27) is connected with the cold end of the flue gas-carbon dioxide heat exchanger (30) through a supercritical carbon dioxide circulating system compressor (28) and a heat regenerator (29), thereby completing the circulation of the supercritical carbon dioxide power generation system.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717026A (en) * | 2022-04-27 | 2022-07-08 | 西安交通大学 | Hydrogen supercritical hydrothermal combustion reaction device and application method thereof |
| CN114893266A (en) * | 2022-06-13 | 2022-08-12 | 中国科学院工程热物理研究所 | Coal and supercritical water gasification power generation system and power generation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717026A (en) * | 2022-04-27 | 2022-07-08 | 西安交通大学 | Hydrogen supercritical hydrothermal combustion reaction device and application method thereof |
| CN114717026B (en) * | 2022-04-27 | 2023-02-07 | 西安交通大学 | Hydrogen supercritical hydrothermal combustion reaction device and application method thereof |
| CN114893266A (en) * | 2022-06-13 | 2022-08-12 | 中国科学院工程热物理研究所 | Coal and supercritical water gasification power generation system and power generation method |
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