WO2022152007A1 - Appareil de puissance à circulation combinée à deux combustibles - Google Patents

Appareil de puissance à circulation combinée à deux combustibles Download PDF

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Publication number
WO2022152007A1
WO2022152007A1 PCT/CN2022/000004 CN2022000004W WO2022152007A1 WO 2022152007 A1 WO2022152007 A1 WO 2022152007A1 CN 2022000004 W CN2022000004 W CN 2022000004W WO 2022152007 A1 WO2022152007 A1 WO 2022152007A1
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Prior art keywords
heating furnace
heat source
boiler
channel
regenerator
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PCT/CN2022/000004
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English (en)
Chinese (zh)
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李华玉
李鸿瑞
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李华玉
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Publication of WO2022152007A1 publication Critical patent/WO2022152007A1/fr

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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
    • 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
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
    • 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]

Definitions

  • the invention belongs to the technical field of thermodynamics and thermodynamics.
  • Cold demand, heat demand and power demand are common in human life and production; among them, the chemical energy of high-quality fuel is converted into thermal energy through combustion, and then the thermal energy is efficiently converted into mechanical energy through a gas-steam power plant. An important means for humans to provide power or electricity.
  • the temperature of the gas formed by the combustion of the fuel directly determines the thermal power conversion efficiency; from the temperature of the gas formed by combustion (such as the combustion temperature at constant pressure)
  • High-grade fuels correspond to high-grade heat sources, which can convert more mechanical energy; while low-grade fuels with low constant-pressure combustion temperatures are difficult to form high-temperature combustion products, corresponding to low-grade heat sources—relative to the former, less mechanical energy can be converted.
  • combustion-supporting medium such as air
  • combustion temperature of the fuel at constant pressure are large, and there is a large irreversible loss of temperature difference in the combustion process, which leads to the loss of mass in fuel utilization - however, this provides an opportunity for low-grade fuels to participate in the construction of heat sources.
  • the present invention provides the rational collocation of low-grade fuel and high-grade fuel to realize learning from each other's strengths and complement each other's advantages, and greatly improve the thermal power conversion efficiency of low-grade fuel.
  • a dual-fuel combined cycle power plant that reduces greenhouse gas emissions and effectively reduces fuel costs.
  • the main purpose of the present invention is to provide a dual-fuel combined cycle power plant, and the specific content of the invention is described as follows:
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator and second heat source regenerator ; External low-grade fuel is connected to the air heating furnace, external air passage is connected to the air heating furnace through the heat source regenerator, and the air heating furnace has a gas channel connected to the outside through the heat source regenerator, and there is high-grade fuel externally.
  • the passage is communicated with the boiler, and the external air passage is communicated with the boiler through the second heat source regenerator and the air heating furnace, and the boiler also has a gas passage communicated with the outside through the second heat source regenerator; It is connected with the expander, and the expander and the circulating working medium channel are connected with the compressor through the high-temperature heat exchanger;
  • the steam turbine is connected with the steam turbine, and the low-pressure steam channel is connected with the condenser; the condenser and the cooling medium channel are connected with the outside, and the expander is connected with the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the boiler There is also a high-grade fuel channel that communicates with the boiler, and an external air channel that communicates with the boiler through the second heat source regenerator and the air heating furnace, and the boiler also has a gas channel that communicates with the outside through the second heat source regenerator;
  • the compressor has a circulation The working fluid channel is connected with the expander through the high temperature regenerator and the boiler, and the expander and the circulating working fluid channel are connected with the compressor through the high temperature regenerator and the warm heat exchanger;
  • the condenser has a condensate pipeline connected with the booster pump.
  • the high-temperature heat exchanger After the high-temperature heat exchanger is connected, the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser also has a cooling medium passage that communicates with the outside, and the expander is connected to the compressor and transmits power to form Dual fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the boiler There is also a high-grade fuel channel that communicates with the boiler, and an external air channel that communicates with the boiler through the second heat source regenerator and the air heating furnace, and the boiler also has a gas channel that communicates with the outside through the second heat source regenerator;
  • the compressor has a circulation The working medium channel is connected with the expander through the high temperature regenerator and the boiler, and then the expander has a circulating working medium channel that communicates with itself through the high temperature regenerator, and the expander also has a circulating working medium channel that communicates with the compressor through a high temperature heat exchanger;
  • the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger through a booster pump.
  • the high-temperature heat exchanger has a steam channel that communicates with the steam turbine.
  • the steam turbine also has a low-pressure steam channel that communicates with the condenser.
  • the condenser also has a cooling medium channel that communicates with the outside. Connected, the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger through a booster pump. After that, the high-temperature heat exchanger has a steam channel that communicates with the steam turbine.
  • the steam turbine also has a low-pressure steam channel that communicates with the condenser.
  • the condenser also has a cooling medium channel that communicates with the outside. Connected, the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the external low-grade fuel is connected to the air heating furnace, the external air channel is connected to the air heating furnace through the heat source regenerator, and the air heating furnace and the gas channel are connected to the outside through the heat source regenerator.
  • the compressor has a circulation After the working fluid channel is communicated with the expander through the boiler, the expander has a circulating working fluid channel that communicates with itself through the high-temperature regenerator, and the expander also has a circulating working fluid channel that communicates with the compressor through the high-temperature heat exchanger, and then the compressor has circulation again.
  • the working medium channel is connected with itself through the high temperature regenerator; the condenser has a condensate pipeline connected with the high temperature heat exchanger through the booster pump, and then the high temperature heat exchanger has a steam channel connected with the steam turbine, and the steam turbine also has a low pressure steam channel and the condensate.
  • the condenser and the cooling medium channel are communicated with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator and second heat source regenerator ; External low-grade fuel is connected to the air heating furnace, external air passage is connected to the air heating furnace through the heat source regenerator, and the air heating furnace has a gas channel connected to the outside through the heat source regenerator, and there is high-grade fuel externally.
  • the passage is communicated with the boiler, and the external air passage is connected with the boiler through the second heat source regenerator and the air heating furnace, and the boiler also has a gas passage communicated with the outside through the second heat source regenerator;
  • the heating furnace and the boiler are communicated with the expander, and the expander and the circulating working medium channel are communicated with the compressor through the high temperature heat exchanger;
  • the condenser also has a cooling medium passage that communicates with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the compressor has a circulation The working fluid channel is connected with the expander through the high temperature regenerator, the air heating furnace and the boiler, and the expander and the circulating working fluid channel are connected with the compressor through the high temperature regenerator and the warm heat exchanger;
  • the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser;
  • the condenser also has a cooling medium passage that communicates with the outside, and the expander is connected to the compressor and Power is transmitted to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the compressor has a circulation The working medium channel is connected with the expander through the air heating furnace, the high temperature regenerator and the boiler, and the expander and the circulating working medium channel are connected with the compressor through the high temperature regenerator and the warm heat exchanger;
  • the high-temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser;
  • the condenser also has a cooling medium passage that communicates with the outside, and the expander is connected to the compressor and Power is transmitted to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the compressor has a circulation
  • the working medium channel is connected with the expander through the high temperature regenerator, the air heating furnace and the boiler, and then the expander has a circulating working medium channel that communicates with itself through the high temperature regenerator, and the expander also has a circulating working medium channel through the high temperature heat exchanger.
  • the compressor is connected; the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger through a booster pump, and then the high-temperature heat exchanger has a steam channel that communicates with the steam turbine, and the steam turbine also has a low-pressure steam channel that communicates with the condenser; the condenser also has cooling
  • the medium channel is communicated with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the compressor has a circulation
  • the working medium channel is connected with the expander through the air heating furnace, the high temperature regenerator and the boiler, and then the expander has a circulating working medium channel that communicates with itself through the high temperature regenerator, and the expander also has a circulating working medium channel that is connected to the expander through a high temperature heat exchanger.
  • the compressor is connected; the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger through a booster pump, and then the high-temperature heat exchanger has a steam channel that communicates with the steam turbine, and the steam turbine also has a low-pressure steam channel that communicates with the condenser; the condenser also has cooling
  • the medium channel is communicated with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature
  • It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the compressor has a circulation The working medium channel is connected with the expander through the air heating furnace and the boiler.
  • the expander also has a circulating working medium channel which is connected with the compressor through a high temperature regenerator and a high temperature heat exchanger. After that, the compressor has a circulating working medium channel passing through the high temperature regenerator.
  • the condenser Connected with itself; the condenser has a condensate pipeline that is connected to the high temperature heat exchanger through a booster pump, and then the high temperature heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser also has a cooling
  • the medium channel is communicated with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator, second heat source regenerator and high temperature It consists of a regenerator; the low-grade fuel is connected to the air heating furnace on the outside, and there is an air channel on the outside that communicates with the air heating furnace through the heat source regenerator.
  • the compressor has a circulation After the working medium channel is connected with the expander through the air heating furnace and the boiler, the expander has a circulating working medium channel that communicates with itself through the high temperature regenerator, and the expander also has a circulating working medium channel that is connected with the compressor through a high temperature heat exchanger and then compressed.
  • the generator has a circulating working medium channel that communicates with itself through a high-temperature regenerator; the condenser has a condensate pipeline that is connected to the high-temperature heat exchanger through a booster pump, and then the high-temperature heat exchanger has a steam channel that communicates with the steam turbine.
  • the steam turbine also has a low pressure
  • the steam channel is communicated with the condenser; the condenser and the cooling medium channel are communicated with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • a dual-fuel combined cycle power plant in any of the dual-fuel combined cycle power plants described in items 1-12, the high-temperature heat exchanger has a steam passage and is adjusted to communicate with the steam turbine so that the high-temperature heat exchanger has steam The passage is communicated with the steam turbine through the air heating furnace to form a dual-fuel combined cycle power plant.
  • a dual-fuel combined cycle power plant in any of the dual-fuel combined cycle power plants described in items 1-12, the high-temperature heat exchanger has a steam passage and is adjusted to communicate with the steam turbine so that the high-temperature heat exchanger has steam After the channel is communicated with the steam turbine, the steam turbine has a steam channel to communicate with itself through the air heating furnace to form a dual-fuel combined cycle power plant.
  • the dual-fuel combined cycle power plant is any one of the dual-fuel combined cycle power plants described in items 1-14, adding a second booster pump and a low-temperature regenerator, and connecting the condenser with a condensate pipe
  • the connection between the pipeline and the booster pump is adjusted so that the condenser has a condensate pipeline connected to the low-temperature regenerator through the second booster pump, and the steam turbine is provided with an extraction channel to communicate with the low-temperature regenerator, and the low-temperature regenerator has a condensate pipeline. It communicates with the booster pump to form a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant which is in any of the dual-fuel combined cycle power plants described in items 1-14, adding an expansion speed-up steam turbine and replacing the steam turbine, adding a diffuser pipe and replacing the booster pump, A dual-fuel combined cycle power plant is formed.
  • Dual-fuel combined cycle power plant in any of the dual-fuel combined cycle power plants described in items 1-16, adding an expansion speed-up machine and replacing the expander, adding a dual-energy compressor and replacing the compressor , forming a dual-fuel combined cycle power plant.
  • Dual-fuel combined cycle power plant in any of the dual-fuel combined cycle power plants described in items 1-17, the second heat source regenerator is eliminated, and the external air passage is passed through the heat source regenerator and the heat source regenerator.
  • the air heating furnace is connected, and the external air channel is connected to the boiler through the second heat source regenerator and the air heating furnace, and it is adjusted so that the external air channel is connected to the heat source regenerator and then divided into two paths - the first path and the air
  • the heating furnace is connected, and the second path is connected with the boiler through the air heating furnace; the boiler has a gas channel to communicate with the outside through the second heat source regenerator, and the boiler has a gas channel that communicates with the outside through the heat source regenerator to form a dual-fuel combined cycle powerplant.
  • Dual-fuel combined cycle power plant mainly composed of steam turbine, booster pump, high temperature heat exchanger, condenser, compressor, expander, air heating furnace, boiler, heat source regenerator and second heat source regenerator ; External low-grade fuel is connected to the air heating furnace, external air passage is connected to the air heating furnace through the heat source regenerator, and the air heating furnace has a gas channel connected to the outside through the heat source regenerator, and there is high-grade fuel externally.
  • the passage communicates with the boiler, and there is an external air passage that communicates with the boiler through the second heat source regenerator and the air heating furnace, and the boiler also has a gas passage that communicates with the outside through the second heat source regenerator; an external working medium passage communicates with the compressor , the compressor and the working medium channel are connected with the expander through the boiler, the expander and the working medium channel are connected with the outside through the high temperature heat exchanger; the condenser has a condensate pipeline connected with the high temperature heat exchanger through the booster pump
  • the heat exchanger has a steam passage that communicates with the steam turbine, and the steam turbine also has a low-pressure steam passage that communicates with the condenser; the condenser also has a cooling medium passage that communicates with the outside, and the expander is connected to the compressor and transmits power to form a dual-fuel combined cycle power plant.
  • Figure 1/19 is a first principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Figure 2/19 is a second principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Figure 3/19 is a third principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Figure 4/19 is a fourth principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 5/19 is the fifth principle thermodynamic system diagram of the dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 6/19 is the sixth principle thermodynamic system diagram of the dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 7/19 is the seventh principle thermodynamic system diagram of the dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 8/19 is an eighth principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 9/19 is the ninth principle thermodynamic system diagram of the dual-fuel combined cycle power plant provided according to the present invention.
  • 10/19 is a tenth principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 11/19 is an eleventh principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 12/19 is a twelfth principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • Fig. 13/19 is a thirteenth principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • 15/19 are diagrams of a fifteenth principle thermodynamic system of a dual-fuel combined cycle power plant provided according to the present invention.
  • 16/19 are diagrams of the sixteenth principle thermodynamic system of the dual-fuel combined cycle power plant provided according to the present invention.
  • Figures 17/19 are diagrams of the seventeenth principle thermodynamic system of a dual-fuel combined cycle power plant provided according to the present invention.
  • Figure 18/19 is an 18th principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • 19/19 is a 19th principle thermodynamic system diagram of a dual-fuel combined cycle power plant provided according to the present invention.
  • the steam flows through the steam turbine 1 to achieve thermal power conversion.
  • the steam at the outlet of the steam turbine 1 has a very low pressure and a small flow rate (corresponding to a small kinetic energy), and the mechanical energy required by the booster pump 2 can be mechanically transmitted by the steam turbine. 1 or provided externally.
  • relevant heat exchangers heat exchange tube bundles
  • a superheater is used to heat the steam from the high-temperature heat exchanger 3; The steam is heated by the reheater.
  • the air heating furnace 7 provides the heat load of the initial stage of the high temperature heat source, and undertakes the task of heating and heating the air entering the boiler 8; in some cases, it also undertakes the heating task of the circulating steam of the bottom Rankine cycle subsystem.
  • the heat source regenerator involves the temperature grade of the gas in the air heating furnace and the boiler, and is listed separately.
  • 1Low-grade fuel refers to the fuel with the highest temperature (such as adiabatic combustion temperature or constant pressure combustion temperature) that can be formed by combustion products, such as coal gangue, coal slime, combustible garbage, etc. From the concept of heat source, low-grade fuel refers to fuel whose combustion products are difficult to form a high-temperature heat source with higher temperature.
  • High-grade fuel refers to the fuel with relatively high highest temperature (such as adiabatic combustion temperature or constant pressure combustion temperature) that can be formed by combustion products, such as high-quality coal, natural gas, methane, hydrogen, etc. From the concept of heat source, high-grade fuel refers to fuel whose combustion products can form a high-temperature heat source with higher temperature.
  • the gaseous substances of the combustion products are the core of the heat source and are an important part of the thermal system; while the solid substances in the combustion products, such as waste residue, the heat energy contained in them is utilized (the utilization process and equipment are included in the In the boiler, or the preheated air outside the boiler body), it is not required to be listed separately, and its function is not described separately.
  • the air heating furnace 7 also has a gas channel that communicates with the outside through the heat source regenerator 9.
  • the high-grade fuel channel is communicated with the boiler 8, and the external air channel is communicated with the boiler 8 through the second heat source regenerator 10 and the air heating furnace 7, and the boiler 8 also has a gas channel communicated with the outside through the second heat source regenerator 10;
  • the compressor 5 has a circulating working medium channel that communicates with the expander 6 through the boiler 8, and the expander 6 also has a circulating working medium channel that communicates with the compressor 5 through the high temperature heat exchanger 3;
  • the condenser 4 has a condensate pipeline through a booster pump.
  • the high-temperature heat exchanger 3 After being communicated with the high-temperature heat exchanger 3, the high-temperature heat exchanger 3 has a steam passage that communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 also has a cooling medium passage that communicates with the outside, and the expander 6 Connect the compressor 5 and transmit power.
  • the external low-grade fuel enters the air heating furnace 7, and the first external air flows into the air heating furnace 7 after the heat source regenerator 9 absorbs heat and raises the temperature, and the low-grade fuel and air are mixed in the air heating furnace 7 And burn into gas with higher temperature, the gas in the air heating furnace 7 releases heat to the other air flowing through it and cools down, and then flows through the heat source regenerator 9 to release heat to cool down and discharge to the outside; the second external air Flow through the second heat source regenerator 10 and the air heating furnace 7 to gradually absorb heat and heat up, and then enter the boiler 8; the external high-grade fuel enters the boiler 8, mixes with the air from the air heating furnace 7 and burns into high-temperature gas, and the boiler 8 generates The high-temperature gas is released to the circulating working fluid that flows through it, and then flows through the second heat source regenerator 10 to release heat to cool down and discharge to the outside; The expander 6 depressurizes and performs work, flows through the high temperature heat exchanger 3 to release heat and
  • the cooling medium takes away the low temperature heat load through the condenser 4, and the air and gas take away the low temperature heat load through the in and out process;
  • the work output by the steam turbine 1 and the expander 6 is provided to the compressor 5 and the external power, or the steam turbine 1 and the The work output by the expander 6 is provided to the booster pump 2, the compressor 5 and the external power to form a dual-fuel combined cycle power plant.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the compressor 5 has a circulating working fluid channel which is communicated with the expander 6 through the high temperature regenerator 11 and the boiler 8, and the expander 6 also has a circulating working fluid channel through the high temperature regenerator 11 and the warm heat exchanger 3.
  • the compressor 5 is connected;
  • the condenser 4 has a condensate pipeline connected with the high-temperature heat exchanger 3 through the booster pump 2, and then the high-temperature heat exchanger 3 has a steam passage connected with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage and the condenser. 4 is communicated; the condenser 4 also has a cooling medium channel to communicate with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the expander 6 After the expander 6 has a circulating working fluid channel that communicates with itself through the high temperature regenerator 11, the expander 6 There is also a circulating working medium channel that communicates with the compressor 5 through the high-temperature heat exchanger 3; the condenser 4 has a condensate pipeline that communicates with the high-temperature heat exchanger 3 through the booster pump 2, and then the high-temperature heat exchanger 3 has a steam channel and a steam turbine. 1, the steam turbine 1 also has a low-pressure steam channel that communicates with the condenser 4; the condenser 4 also has a cooling medium channel that communicates with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the compressor 5 has a circulating working fluid channel that is communicated with the expander 6 through the boiler 8, and the expander 6 also has a circulating working fluid channel that is connected with the compressor 5 through the high temperature regenerator 11 and the high temperature heat exchanger 3 and then compressed.
  • the engine 5 has a circulating working medium channel that communicates with itself through the high-temperature regenerator 11;
  • the condenser 4 has a condensate pipeline that communicates with the high-temperature heat exchanger 3 through the booster pump 2, and then the high-temperature heat exchanger 3 has a steam channel and a steam turbine.
  • the steam turbine 1 also has a low-pressure steam channel that communicates with the condenser 4;
  • the condenser 4 also has a cooling medium channel that communicates with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the difference is: the circulating working medium discharged from the compressor 5 flows through the boiler 8 to absorb heat and heat up, and flows through the expander 6 to lower the temperature.
  • the pressure works, flows through the high temperature regenerator 11 and the high temperature heat exchanger 3 to gradually release heat and cool down, enters the compressor 5 to increase the pressure and heat up to a certain level, and then flows through the high temperature regenerator 11 to absorb heat and heat up, and then enters the compressor 5 Continue to boost and heat up to form a dual-fuel combined cycle power plant.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the compressor 5 has a circulating working medium channel that communicates with the expander 6 through the boiler 8, and then the expander 6 has a circulating working medium channel that communicates with itself through the high temperature regenerator 11, and the expander 6 also has a circulating working medium channel.
  • the compressor 5 has a circulating working medium channel to communicate with itself through the high temperature regenerator 11;
  • the condenser 4 has a condensate pipeline through the booster pump 2 and the high temperature heat exchanger 3.
  • the high-temperature heat exchanger 3 After being connected, the high-temperature heat exchanger 3 has a steam passage to communicate with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage to communicate with the condenser 4; the condenser 4 also has a cooling medium passage to communicate with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the difference is: the circulating working medium discharged from the compressor 5 flows through the boiler 8 to absorb heat and heat up, and enters the expander 6 to reduce pressure After the work reaches a certain level, it flows through the high temperature regenerator 11 to release heat and cool down, and then enters the expander 6 to continue depressurization and work; the circulating working medium discharged from the expander 6 flows through the high temperature heat exchanger 3 to release heat and cool down, and enters the compressor. 5. After the pressure rises to a certain level, it flows through the high temperature regenerator 11 to absorb heat and heat up, and then enters the compressor 5 to continue the pressure rise and rise to form a dual-fuel combined cycle power plant.
  • the air heating furnace 7 also has a gas channel communicated with the outside through the heat source regenerator 9.
  • the high-grade fuel channel is communicated with the boiler 8, and the external air channel is communicated with the boiler 8 through the second heat source regenerator 10 and the air heating furnace 7, and the boiler 8 also has a gas channel communicated with the outside through the second heat source regenerator 10;
  • the compressor 5 has a circulating working fluid channel which is communicated with the expander 6 through the air heating furnace 7 and the boiler 8, and the expander 6 also has a circulating working fluid channel that communicates with the compressor 5 through the high temperature heat exchanger 3;
  • the condenser 4 has a condensate pipe.
  • the high-temperature heat exchanger 3 After the booster pump 2 is communicated with the high-temperature heat exchanger 3, the high-temperature heat exchanger 3 has a steam passage that communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 also has a cooling medium passage and External communication, the expander 6 is connected to the compressor 5 and transmits power.
  • the difference is: the circulating working medium discharged from the compressor 5 flows through the air heating furnace 7 and the boiler 8 and gradually absorbs heat and warms up, It flows through the expander 6 to depressurize to perform work, flows through the high-temperature heat exchanger 3 to release heat to cool down, and then enters the compressor 5 to increase the pressure and heat up to form a dual-fuel combined cycle power plant.
  • the compressor 5 has a circulating working fluid channel that is communicated with the expander 6 through the high temperature regenerator 11, the air heating furnace 7 and the boiler 8, and the expander 6 also has a circulating working fluid channel through the high temperature regenerator 11 and the temperature.
  • the heat exchanger 3 is communicated with the compressor 5; the condenser 4 has a condensate pipeline connected with the high temperature heat exchanger 3 through the booster pump 2, and then the high temperature heat exchanger 3 has a steam passage communicated with the steam turbine 1, and the steam turbine 1 also has a low pressure.
  • the steam channel is communicated with the condenser 4; the condenser 4 also has a cooling medium channel communicated with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the outside is connected with the air heating furnace 7 with low-grade fuel, and the outside also has an air channel connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 and the gas channel are connected with the outside through the heat source regenerator 9.
  • the boiler 8 Connected, there is also a high-grade fuel channel on the outside that communicates with the boiler 8, and an air channel on the outside that communicates with the boiler 8 through the second heat source regenerator 10 and the air heating furnace 7, and the boiler 8 also has a gas channel through the second heat source regenerator.
  • 10 is communicated with the outside; the compressor 5 has a circulating working fluid channel, which is communicated with the expander 6 through the air heating furnace 7, the high temperature regenerator 11 and the boiler 8, and the expander 6 also has a circulating working fluid channel through the high temperature regenerator 11 and the temperature.
  • the heat exchanger 3 is communicated with the compressor 5; the condenser 4 has a condensate pipeline connected with the high temperature heat exchanger 3 through the booster pump 2, and then the high temperature heat exchanger 3 has a steam passage communicated with the steam turbine 1, and the steam turbine 1 also has a low pressure.
  • the steam channel is communicated with the condenser 4; the condenser 4 also has a cooling medium channel communicated with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the compressor 5 has a circulating working medium channel through the air heating furnace 7, the high temperature regenerator 11 and the boiler 8 and is connected to the expander 6, and then the expander 6 has a circulating working medium channel through the high temperature regenerator 11 and itself.
  • the expander 6 also has a circulating working medium channel that communicates with the compressor 5 through the high-temperature heat exchanger 3;
  • a steam passage communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage communicated with the condenser 4;
  • the condenser 4 also has a cooling medium passage communicated with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the compressor 5 has a circulating working medium channel that communicates with the expander 6 through the air heating furnace 7 and the boiler 8, and the expander 6 also has a circulating working medium channel through the high temperature regenerator 11 and the high temperature heat exchanger 3 and the compressor.
  • the compressor 5 After the compressor 5 is connected, the compressor 5 has a circulating working medium channel that communicates with itself through the high temperature regenerator 11;
  • a steam passage communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage communicated with the condenser 4;
  • the condenser 4 also has a cooling medium passage communicated with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the difference is: the circulating working medium discharged from the compressor 5 flows through the air heating furnace 7 and the boiler 8 and gradually absorbs heat and warms up, It flows through the expander 6 to depressurize to perform work, flows through the high-temperature regenerator 11 and the high-temperature heat exchanger 3 to gradually release heat and cool down, and then enters the compressor 5 to increase the pressure and heat up to a certain degree, and then flows through the high-temperature regenerator 11 to absorb heat and heat up, After that, it enters the compressor 5 to continue boosting and heating up, forming a dual-fuel combined cycle power plant.
  • the dual-fuel combined cycle powerplant shown in Figure 12/19 is implemented as follows:
  • the outside is connected with low-grade fuel and the air heating furnace 7, and the outside has an air channel which is connected with the air heating furnace 7 through the heat source regenerator 9, and the air heating furnace 7 also has a gas channel through the heat source regenerator 9 and the outside.
  • the compressor 5 has a circulating working medium channel that communicates with the expander 6 through the air heating furnace 7 and the boiler 8, and the expander 6 has a circulating working medium channel that communicates with itself through the high temperature regenerator 11, and the expander 6 also There is a circulating working medium channel that is communicated with the compressor 5 through the high temperature heat exchanger 3, and then the compressor 5 has a circulating working medium channel that communicates with itself through the high temperature regenerator 11;
  • the condenser 4 has a condensate pipeline through the booster pump 2 and After the high temperature heat exchanger 3 is connected, the high temperature heat exchanger 3 has a steam passage connected with the steam turbine 1, and the steam turbine 1 also has a low pressure steam passage connected with the condenser 4; the condenser 4 also has a cooling medium passage communicated with the outside, and the expander 6 is connected Compressor 5 and transmit power.
  • the difference is: the circulating working medium discharged from the compressor 5 flows through the air heating furnace 7 and the boiler 8 and gradually absorbs heat and warms up, After entering the expander 6 to depressurize the work to a certain extent, it flows through the high temperature regenerator 11 to release heat and cool down, and then enters the expander 6 to continue depressurization and work; the circulating working medium discharged from the expander 6 flows through the high temperature heat exchanger 3 to discharge Thermal cooling, entering the compressor 5 to increase the pressure and temperature to a certain level, then flow through the high temperature regenerator 11 to absorb heat and increase the temperature, and then enter the compressor 5 to continue to increase the pressure and temperature to form a dual-fuel combined cycle power plant.
  • the dual-fuel combined cycle powerplant shown in Figure 13/19 is implemented as follows:
  • the high-temperature heat exchanger 3 has a steam passage to communicate with the steam turbine 1 and is adjusted so that the high-temperature heat exchanger 3 has a steam passage through the air heating furnace 7 Connected with the steam turbine 1.
  • the high-temperature heat exchanger 3 has a steam passage connected with the steam turbine 1 and is adjusted so that the high-temperature heat exchanger 3 has a steam passage and is connected with the steam turbine 1.
  • the steam turbine 1 further has a steam passage communicating with itself through the air heating furnace 7 .
  • the dual-fuel combined cycle powerplant shown in Figure 16/19 is implemented as follows:
  • the air heating furnace 7 also has a gas channel communicated with the outside through the heat source regenerator 9.
  • the high-grade fuel channel is communicated with the boiler 8, and the external air channel is communicated with the boiler 8 through the second heat source regenerator 10 and the air heating furnace 7, and the boiler 8 also has a gas channel communicated with the outside through the second heat source regenerator 10;
  • the outside has a working medium channel that communicates with the compressor 5, the compressor 5 also has a working medium channel that communicates with the expander 6 through the boiler 8, and the expander 6 also has a working medium channel that communicates with the outside through the high temperature heat exchanger 3;
  • the condenser 4 has After the condensate pipeline is communicated with the high-temperature heat exchanger 3 through the booster pump 2, the high-temperature heat exchanger 3 has a steam passage that communicates with the steam turbine 1, and the steam turbine 1 also has a low-pressure steam passage that communicates with the condenser 4; the condenser 4 also has a cooling
  • the medium passage communicates with the outside, and the expander 6 is connected to the compressor 5 and transmits power.
  • the external low-grade fuel enters the air heating furnace 7, the first external air flows through the heat source regenerator 9 and enters the air heating furnace 7 after absorbing heat and heating up, and the low-grade fuel and air are mixed in the air heating furnace 7 And burn into high-temperature gas, the gas in the air heating furnace 7 releases heat to the other air flowing through it and cools down, and then flows through the heat source regenerator 9 to release heat to cool down and discharge to the outside; the second external air Flow through the second heat source regenerator 10 and the air heating furnace 7 and gradually absorb heat and heat up, and then enter the boiler 8; the external high-grade fuel enters the boiler 8, mixes with the air from the air heating furnace 7 and burns into high-temperature gas, and the boiler 8 generates The high-temperature gas is released to the working medium that flows through it, and then flows through the second heat source regenerator 10 to release heat to cool down and discharge to the outside; the external working medium flows through the compressor 5 to raise the pressure, and flows through the boiler 8 to absorb heat , flows through the
  • the cooling medium takes away the low temperature heat load through the condenser 4, the air and gas take away the low temperature heat load through the in and out process, and the working medium takes away the low temperature heat load through the in and out process;
  • the work output by the steam turbine 1 and the expander 6 is provided to the compressor 5 and external power, or the work output by the steam turbine 1 and the expander 6 is provided to the booster pump 2, the compressor 5 and the external power to form a dual-fuel combined cycle power plant.
  • the low-grade fuel completes the air temperature increase and provides it for the high-grade fuel, effectively reducing the irreversible loss of temperature difference during the combustion process of the high-grade fuel.
  • Low-grade fuel can be used or helpful to reduce the compression ratio of the top gas power cycle system, increase the flow rate of the gas cycle working medium, and is conducive to the construction of a large-load combined cycle power plant.
  • the high-temperature gas grade can be significantly improved, and the utilization value of the low-grade fuel can be improved.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention concerne un appareil de puissance à circulation combinée à deux combustibles, faisant partie du domaine de la thermodynamique et de la technologie thermodynamique. Un combustible de faible qualité est disposé à l'extérieur un four de chauffage d'air et communique avec celui-ci. Un passage d'air est prévu à l'extérieur et communique avec le four de chauffage d'air au moyen d'un réchauffeur à source de chaleur. Le four de chauffage d'air est en outre pourvu d'un passage de gaz qui communique avec l'extérieur au moyen du réchauffeur à source de chaleur. Un passage de combustible de qualité supérieure est disposé à l'extérieur d'une chaudière et communique avec celle-ci. Un passage d'air est prévu à l'extérieur et communique avec la chaudière au moyen d'un deuxième réchauffeur à source de chaleur et du four de chauffage d'air. La chaudière est en outre pourvue d'un passage de gaz communiquant avec l'extérieur au moyen du deuxième réchauffeur à source de chaleur. Un compresseur est pourvu d'un passage de fluide de travail en circulation qui communique avec un détendeur au moyen du four de chauffage d'air et de la chaudière. Le détendeur est en outre pourvu d'un passage de fluide de travail en circulation communiquant avec le compresseur au moyen d'un échangeur de chaleur à haute température. Un condenseur communique avec l'échangeur de chaleur à haute température au moyen d'une pompe de suralimentation, puis l'échangeur de chaleur à haute température est pourvu d'un passage de vapeur qui communique avec une turbine à vapeur. La turbine à vapeur est pourvue d'un passage de vapeur à basse pression qui communique avec le condenseur. Le condenseur comprend en outre un passage de fluide de refroidissement qui communique avec l'extérieur. Le détendeur est relié au compresseur et transmet de l'énergie, formant ainsi un appareil de puissance à circulation combinée à deux combustibles.
PCT/CN2022/000004 2021-01-17 2022-01-17 Appareil de puissance à circulation combinée à deux combustibles WO2022152007A1 (fr)

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CN202110115931.6 2021-01-17

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253300A (en) * 1979-08-03 1981-03-03 General Electric Company Supplementary fired combined cycle power plants
CN101144396A (zh) * 2006-09-15 2008-03-19 马龙根 双燃料助燃型燃气-蒸汽联合循环***
CN106224099A (zh) * 2016-09-20 2016-12-14 中国科学院工程热物理研究所 一种双燃料热电联供注水正逆燃气轮机联合循环***
CN206037009U (zh) * 2016-09-14 2017-03-22 西安热工研究院有限公司 煤基二氧化碳和有机工质联合循环发电***
CN108019245A (zh) * 2016-12-15 2018-05-11 李华玉 多重联合循环动力装置
CN110985149A (zh) * 2018-11-22 2020-04-10 李华玉 联合循环动力装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4253300A (en) * 1979-08-03 1981-03-03 General Electric Company Supplementary fired combined cycle power plants
CN101144396A (zh) * 2006-09-15 2008-03-19 马龙根 双燃料助燃型燃气-蒸汽联合循环***
CN206037009U (zh) * 2016-09-14 2017-03-22 西安热工研究院有限公司 煤基二氧化碳和有机工质联合循环发电***
CN106224099A (zh) * 2016-09-20 2016-12-14 中国科学院工程热物理研究所 一种双燃料热电联供注水正逆燃气轮机联合循环***
CN108019245A (zh) * 2016-12-15 2018-05-11 李华玉 多重联合循环动力装置
CN110985149A (zh) * 2018-11-22 2020-04-10 李华玉 联合循环动力装置

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