CN114909194A - Dual-fuel combined cycle steam power device - Google Patents

Dual-fuel combined cycle steam power device Download PDF

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Publication number
CN114909194A
CN114909194A CN202210119738.4A CN202210119738A CN114909194A CN 114909194 A CN114909194 A CN 114909194A CN 202210119738 A CN202210119738 A CN 202210119738A CN 114909194 A CN114909194 A CN 114909194A
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China
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communicated
heating furnace
steam
channel
steam turbine
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CN202210119738.4A
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Chinese (zh)
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李鸿瑞
李华玉
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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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/08—Adaptations for driving, or combinations with, pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
    • F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/18—Combinations of steam boilers with other apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • F25B40/06—Superheaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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]

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

Abstract

The invention provides a dual-fuel combined cycle steam power device, belonging to the technical field of thermodynamics and thermodynamics. The external part is provided with a low-grade fuel channel communicated with the heating furnace, an air channel communicated with the heating furnace through a heat source heat regenerator, and a fuel gas channel communicated with the external part through the heat source heat regenerator; the outside of the second heating furnace is also provided with a high-grade fuel channel communicated with the second heating furnace, the outside of the second heating furnace is also provided with an air channel communicated with the second heating furnace through a second heat source heat regenerator, and the second heating furnace is also provided with a fuel gas channel communicated with the outside through the second heat source heat regenerator; the condenser is communicated with a second heating furnace through a booster pump, an evaporator and a second steam turbine, the compressor is provided with a steam channel communicated with the second heating furnace, the second heating furnace is also provided with a steam channel communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the compressor and the condenser respectively after passing through the evaporator; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.

Description

Dual-fuel combined cycle steam power device
The technical field is as follows:
the invention belongs to the technical field of thermodynamics and thermodynamics.
Background art:
cold demand, heat demand and power demand, which are common in human life and production; among them, the conversion of chemical energy of fuel into thermal energy by combustion and the conversion of thermal energy into mechanical energy by a steam power device are important means for providing power or electricity to human beings.
From the view of the temperature of fuel gas formed by combustion (such as constant-pressure combustion temperature), the high-grade fuel with high constant-pressure combustion temperature has high temperature of combustion products, and can be independently used as a high-temperature heat source capable of meeting high-efficiency power circulation to convert more mechanical energy; low-grade fuel with low constant pressure combustion temperature is difficult to form high-temperature combustion products and to be a high-temperature heat source capable of meeting high-efficiency power circulation independently, and the converted mechanical energy is relatively less. However, due to one or more factors such as the operating principle, the properties of the working medium, the material properties, the manufacturing level of the equipment and the parts, during the process of forming the high-temperature heat source from the high-grade fuel, part of the high-temperature combustion heat is supplied to the low-temperature section of the heat source, so that the quality loss of the fuel utilization is caused, and the opportunity is provided for the low-grade fuel to participate in the construction of the heat source.
The invention provides a dual-fuel combined cycle steam power device which can reasonably match low-grade fuel and high-grade fuel to jointly build a heat source, make up for deficiencies of the low-grade fuel and the high-grade fuel, complement the advantages of the low-grade fuel and the high-grade fuel, greatly improve the heat power change efficiency of the low-grade fuel, reduce the emission of greenhouse gases and effectively reduce the fuel cost.
The invention content is as follows:
the invention mainly aims to provide a dual-fuel combined cycle steam power device, and the specific invention contents are explained in the following items:
1. the dual-fuel combined cycle steam power plant mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, the evaporator is communicated with a second steam turbine through a steam channel after the condensate pipeline is communicated with the evaporator through a booster pump, the second steam turbine is also provided with a steam channel communicated with a second heating furnace, the compressor is provided with a steam channel communicated with the second heating furnace, the second heating furnace is also provided with a steam channel communicated with a steam turbine, and the steam turbine is also provided with a low-pressure steam channel communicated with the evaporator and then divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
2. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with a second steam turbine, the steam channel of the second steam turbine is communicated with a second heating furnace through the evaporator, the compressor is provided with a steam channel communicated with the second heating furnace or communicated with the second heating furnace through the evaporator, the steam channel of the second heating furnace is communicated with a steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
3. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump and an evaporator are communicated, then a steam channel of the evaporator is communicated with a second steam turbine through a high-temperature heat regenerator, the second steam turbine is also provided with a steam channel which is communicated with a second heating furnace through the high-temperature heat regenerator, the compressor is provided with a steam channel which is communicated with the second heating furnace through the high-temperature heat regenerator, the second heating furnace is also provided with a steam channel which is communicated with a steam turbine, then the steam channel of the steam turbine is communicated with the steam turbine through the high-temperature heat regenerator, the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, wherein the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
4. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with a second steam turbine through a heating furnace, the second steam turbine is also provided with a steam channel communicated with a second heating furnace, the compressor is provided with a steam channel communicated with the second heating furnace, the second heating furnace is also provided with a steam channel communicated with a steam turbine, and the steam turbine is also provided with a low-pressure steam channel communicated with the evaporator and then divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
5. The double-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a heat supplier; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a heating furnace is communicated with a second steam turbine through a booster pump, the heating furnace is further provided with a steam channel, the second steam turbine is further provided with a steam channel, the second heating furnace is communicated with the second heating furnace, the compressor is provided with a steam channel, the second heating furnace is further provided with a steam channel, the steam channel is communicated with a steam turbine, the steam turbine is further provided with a low-pressure steam channel, the low-pressure steam channel is communicated with a heat supply device and then divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel communicated with the outside, the heat supplier is also provided with a heated medium channel communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
6. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with a second steam turbine, the second steam turbine is also provided with a steam channel which is communicated with a steam turbine through a middle steam inlet port after passing through a heating furnace, the compressor is provided with a steam channel which is communicated with a second heating furnace, the second heating furnace is also provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
7. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with a second steam turbine, the second steam turbine is also provided with a steam channel which is communicated with a second heating furnace through a heating furnace, the compressor is provided with a steam channel which is communicated with the second heating furnace through the heating furnace, the second heating furnace is also provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
8. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with a second steam turbine, the second steam turbine is also provided with a steam channel which is communicated with a second heating furnace through the evaporator and the heating furnace, the compressor is provided with a steam channel which is communicated with the second heating furnace through the heating furnace or communicated with the second heating furnace through the evaporator and the heating furnace, the second heating furnace is also provided with a steam channel which is communicated with a steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
9. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, a booster pump and an evaporator are communicated, then a steam channel of the evaporator is communicated with a second steam turbine through a high-temperature heat regenerator, the second steam turbine is also provided with a steam channel which is communicated with a second heating furnace through the high-temperature heat regenerator and a heating furnace, the compressor is provided with a steam channel which is communicated with the second heating furnace through the high-temperature heat regenerator and the heating furnace, the second heating furnace is also provided with a steam channel which is communicated with a steam turbine, then the steam channel of the steam turbine is communicated with the steam turbine through the high-temperature heat regenerator, the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
10. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with a second steam turbine through a heating furnace, the second steam turbine is also provided with a steam channel which is communicated with a second heating furnace through the heating furnace, the compressor is provided with a steam channel which is communicated with the second heating furnace through the heating furnace, the second heating furnace is also provided with a steam channel which is communicated with a steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
11. The double-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a heat supplier; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace, the external part is also provided with an air channel which is communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the heating furnace through a booster pump, then a steam channel of the heating furnace is communicated with a second steam turbine, the second steam turbine is also provided with a steam channel which is communicated with the second heating furnace through the heating furnace, the compressor is provided with a steam channel which is communicated with the second heating furnace through the heating furnace, the second heating furnace is also provided with a steam channel which is communicated with a steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the heating furnace and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel communicated with the outside, the heat supplier is also provided with a heated medium channel communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
12. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part of the heating furnace is provided with a low-grade fuel channel communicated with the heating furnace, the external part of the heating furnace is also provided with an air channel communicated with the heating furnace through a heat source heat regenerator, and the heating furnace is also provided with a fuel gas channel communicated with the external part through the heat source heat regenerator; the outside of the furnace is also provided with a high-grade fuel channel which is communicated with a second heating furnace, the outside of the furnace is also provided with an air channel which is communicated with the second heating furnace through a second heat source heat regenerator and the heating furnace, and the second heating furnace is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator; the condenser is provided with a condensate pipeline, the evaporator is further provided with a steam channel to be communicated with a second steam turbine after the condensate pipeline is communicated with the evaporator through a booster pump, the second steam turbine is also provided with a steam channel to be communicated with a steam turbine through a middle steam inlet port after passing through a heating furnace, the compressor is provided with a steam channel to be communicated with a second heating furnace through the heating furnace, the second heating furnace is also provided with a steam channel to be communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel to be communicated with the evaporator and then divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine is connected with the compressor and transmits power to form the dual-fuel combined cycle steam power device.
13. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices in items 1-12, a second heating furnace is provided with a steam passage to be communicated with a steam turbine, the second heating furnace is provided with a steam passage to be communicated with the steam turbine, and then the steam turbine is also provided with a reheated steam passage to be communicated with the steam turbine through the heating furnace, so that the dual-fuel combined cycle steam power device is formed.
14. A dual-fuel combined cycle steam power plant is characterized in that in any one of the dual-fuel combined cycle steam power plants described in items 1-12, a second heating furnace is provided with a steam passage to be communicated with a steam turbine, the steam turbine is provided with a reheat steam passage to be communicated with the steam turbine through the second heating furnace after the second heating furnace is provided with the steam passage to be communicated with the steam turbine, and the dual-fuel combined cycle steam power plant is formed.
15. A dual-fuel combined cycle steam power plant is characterized in that in any one of the dual-fuel combined cycle steam power plants described in items 1-12, a second heating furnace is provided with a steam passage to be communicated with a steam turbine, the steam turbine is provided with a reheat steam passage to be communicated with the steam turbine through the heating furnace and the second heating furnace after the second heating furnace is provided with the steam passage to be communicated with the steam turbine, and the dual-fuel combined cycle steam power plant is formed.
16. A dual-fuel combined cycle steam power device is characterized in that a low-temperature heat regenerator and a second booster pump are added in any one of the dual-fuel combined cycle steam power devices in items 1-15, a condenser with a condensate pipeline communicated with the booster pump is adjusted to be communicated with a low-temperature heat regenerator through the second booster pump, a compressor is additionally provided with a steam extraction channel communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the booster pump through the condensate pipeline, so that the dual-fuel combined cycle steam power device is formed.
17. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices 1-15, an expansion speed increaser is added to replace a steam turbine, a dual-energy compressor is added to replace a compressor, and a diffuser pipe is added to replace a booster pump, so that the dual-fuel combined cycle steam power device is formed.
18. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices in items 1-17, a second heat source heat regenerator is cancelled, an external air channel is communicated with a heating furnace through the heat source heat regenerator, and the external air channel is communicated with a second heating furnace through the second heat source heat regenerator and the heating furnace, and the adjustment is that the external air channel is communicated with the heat source heat regenerator and then divided into two paths, namely, the first path is communicated with the heating furnace, and the second path is communicated with the second heating furnace through the heating furnace; and adjusting the communication between the fuel gas channel of the second heating furnace and the outside through a second heat source heat regenerator to ensure that the fuel gas channel of the second heating furnace is communicated with the outside through the heat source heat regenerator to form the dual-fuel combined cycle steam power device.
Description of the drawings:
FIG. 1 is a schematic thermodynamic system diagram of a dual fuel combined cycle steam power plant 1 provided in accordance with the present invention.
FIG. 2 is a schematic thermodynamic system diagram of a dual fuel combined cycle steam power plant of type 2 provided in accordance with the present invention.
FIG. 3 is a diagram of a 3 rd principle thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 4 is a diagram of a 4 th principle thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 5 is a diagram of a 5 th principle thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 6 is a diagram of a 6 th principle thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 7 is a 7 th principle thermodynamic system diagram of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 8 is a diagram of an 8 th principle thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 9 is a diagram of a 9 th principal thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 10 is a diagram of a 10 th principal thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
FIG. 11 is a diagram of a 11 th principle thermodynamic system of a dual fuel combined cycle steam power plant provided in accordance with the present invention.
In the figure, 1-steam turbine, 2-compressor, 3-booster pump, 4-condenser, 5-evaporator (waste heat boiler), 6-heating furnace, 7-second heating furnace, 8-heat source heat regenerator, 9-second heat source heat regenerator, 10-high temperature heat regenerator, 11-heat supplier, 12-second steam turbine, 13-low temperature heat regenerator, 14-second booster pump, 15-expansion speed increaser, 16-dual-energy compressor and 17-diffuser pipe.
With respect to the expansion speed increaser, the heating furnace, the heat source regenerator, the low-grade fuel and the high-grade fuel, the following description is given:
(1) in order to reveal the differences in the operational sequences between the steam turbine 1 and the expansion gear-box 15, the following explanations are made:
in fig. 1, the steam flows through the steam turbine 1 to realize thermal work, the steam at the outlet of the steam turbine 1 has very low pressure and small flow rate (corresponding to small kinetic energy), and the mechanical energy required by the booster pump 4 is provided by the steam turbine 1 or from the outside through mechanical transmission.
In contrast, in fig. 10, the steam at the outlet of the expansion speed increaser 15 also has a very low pressure, but the flow rate is relatively large (a part of the pressure drop is converted into the kinetic energy of the low-pressure steam) so as to meet the speed reduction and pressure increase requirements of the diffuser pipe 17 and meet the requirements of the dual-energy compressor 16 for partial pressure increase (obtained by speed reduction).
Thirdly, the process of realizing thermal variable work by steam flowing through the steam turbine 1 in the figure 1 is expressed by decompression work, and the process of realizing thermal variable work by steam flowing through the expansion speed increaser 15 in the figure 10 is expressed by decompression work and speed increase.
(2) Heating furnace and heat source regenerator:
firstly, a heat exchange tube bundle is arranged in the heating furnace as required to heat the medium flowing through the heating furnace, wherein the heat exchange tube bundle comprises a heat exchanger for raising the temperature of the medium, and an evaporator for heating and vaporizing, a reheater for reheating steam and the like can also be arranged.
And secondly, the specific heat exchange tube bundle related to the circulation medium flowing through the heating furnace is not specified, and the circulation medium is uniformly expressed by adopting the heating furnace.
And thirdly, the heat source heat regenerator relates to the temperature grade of fuel gas (namely the high-temperature section of the heat source) in the heating furnace and is listed independently.
(3) Low-grade and high-grade fuels:
firstly, low-grade fuel: refers to a fuel in which the highest temperature at which combustion products can form (such as adiabatic combustion temperature or fixed pressure combustion temperature) is relatively low; compared with high-quality coal, coal gangue, coal slime and the like are low-grade fuels. From the concept of heat source, low grade fuel refers to fuel whose combustion products are difficult to form a high temperature heat source of higher temperature.
High-grade fuel: refers to a fuel in which the highest temperature at which combustion products can form (such as adiabatic combustion temperature or fixed pressure combustion temperature) is relatively high; compared with fuels such as coal gangue and coal slime, high-quality coal, natural gas, methane, hydrogen and the like are high-grade fuels. From the concept of heat source, high grade fuel refers to fuel whose combustion products can form a high temperature heat source of higher temperature.
For solid fuel, the gaseous matter of the combustion product is the core of heat source and is the important component of thermodynamic system; the solid substances in the combustion products, such as waste slag, are discharged after the heat energy contained in the combustion products is utilized (the utilization process and equipment are included in the heating furnace or air is preheated outside the heating furnace body), are not separately listed, and the functions of the solid substances are not separately expressed.
The quality of the fuel is divided by the temperature of the highest temperature formed by combustion products minus the indirect heat transfer temperature difference, especially for the fuel which needs to provide driving high-temperature heat load to the circulating working medium by indirect means; or, the temperature which can be reached by the circulating working medium under the existing technical conditions is divided into high-grade fuel and low-grade fuel, wherein the high-grade fuel is the one with higher temperature which can be reached by the circulating working medium (working medium), and the low-grade fuel is the one with lower temperature which can be reached by the circulating working medium (working medium).
The specific implementation mode is as follows:
it is to be noted that, in the description of the structure and the flow, the repetition is not necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.
The dual fuel combined cycle steam power plant shown in fig. 1 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator 6 through the booster pump 4, then the evaporator 6 is provided with a steam channel to be communicated with the second steam turbine 2, the steam channel of the second steam turbine 2 is communicated with the second heating furnace 8, the compressor 3 is provided with a steam channel to be communicated with the second heating furnace 8, the steam channel of the second heating furnace 8 is communicated with the steam turbine 1, the steam turbine 1 is also provided with a low-pressure steam channel to be communicated with the evaporator 6 and then divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In the process, external low-grade fuel enters the heating furnace 7, external first path air enters the heating furnace 7 after absorbing heat and raising temperature through the heat source heat regenerator 9, the low-grade fuel and the air are mixed in the heating furnace 7 and are combusted into fuel gas with higher temperature, the fuel gas in the heating furnace 7 releases heat to the air flowing through the heating furnace and lowers the temperature, and then the fuel gas flows through the heat source heat regenerator 9 to release heat and lower the temperature and is discharged to the outside; the external high-grade fuel enters a second heating furnace 8, the external second path of air gradually absorbs heat and heats through a second heat source heat regenerator 10 and a heating furnace 7 and then enters the second heating furnace 8, the high-grade fuel and the air are mixed and combusted in the second heating furnace 8 to form high-temperature fuel gas, the high-temperature fuel gas releases heat to the circulating working medium flowing through the high-temperature fuel gas and cools, and then the high-temperature fuel gas flows through the second heat source heat regenerator 10 to release heat, cool and discharge to the outside; the condensate of the condenser 5 is boosted by the booster pump 4, absorbed heat, heated, vaporized and overheated by the evaporator 6, reduced pressure and work by the second turbine 2, absorbed heat and heated by the second heating furnace 8, and the steam discharged by the compressor 3 is absorbed heat and heated by the second heating furnace 8; the steam discharged by the second heating furnace 8 flows through the steam turbine 1 to reduce the pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 6 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the heating furnace 7 and the second heating furnace 8, and the cooling medium takes away the low-temperature heat load through the condenser 5; the work output by the steam turbine 1 and the second steam turbine 2 is provided for the compressor 3 and the external actuating power, or the work output by the steam turbine 1 and the second steam turbine 2 is provided for the compressor 3, the booster pump 4 and the external actuating power, so that a dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 2 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 has a condensate pipeline, after the condensate pipeline is communicated with the evaporator 6 through the booster pump 4, the evaporator 6 is provided with a steam channel to be communicated with the second steam turbine 2, the second steam turbine 2 is also provided with a steam channel to be communicated with the second heating furnace 8 through the evaporator 6, the compressor 3 is provided with a steam channel to be communicated with the second heating furnace 8 through the evaporator 6, the second heating furnace 8 is also provided with a steam channel to be communicated with the steam turbine 1, the steam turbine 1 is also provided with a low-pressure steam channel to be communicated with the evaporator 6 and then divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate of the condenser 5 is boosted by the booster pump 4, absorbed heat, heated, vaporized and overheated by the evaporator 6, reduced pressure and work by the second steam turbine 2, absorbed heat by the evaporator 6 and then enters the second heating furnace 8 for absorbing heat and heating, and the steam discharged by the compressor 3 enters the second heating furnace 8 for absorbing heat and heating after absorbed heat by the evaporator 6; the steam discharged by the second heating furnace 8 flows through the steam turbine 1 to reduce pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 6 to release heat and reduce temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase pressure and temperature, and the second path enters the condenser 5 to release heat and condense, so that the dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 3 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 has a condensate pipeline which is communicated with the evaporator 6 through the booster pump 4, then a steam channel of the evaporator 6 is communicated with the second steam turbine 2 through the high-temperature heat regenerator 11, the second steam turbine 2 is also communicated with the second heating furnace 8 through the high-temperature heat regenerator 11, a steam channel of the compressor 3 is communicated with the second heating furnace 8 through the high-temperature heat regenerator 11, the second heating furnace 8 is also communicated with the steam channel of the steam turbine 1 after the steam channel is communicated with the steam turbine 1, then the steam channel of the steam turbine 1 is communicated with the steam turbine 1 through the high-temperature heat regenerator 11, and the steam turbine 1 is also communicated with the evaporator 6 and then divided into two paths, namely, a first path is communicated with the compressor 3 and a second path is communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate of the condenser 5 flows through the booster pump 4 to be boosted, flows through the evaporator 6 to absorb heat, raise temperature, vaporize and overheat, flows through the high-temperature heat regenerator 11 to absorb heat and raise temperature, flows through the second steam turbine 2 to reduce pressure and do work, flows through the high-temperature heat regenerator 11 to absorb heat and then enters the second heating furnace 8 to absorb heat and raise temperature, and the steam discharged by the compressor 3 flows through the high-temperature heat regenerator 11 to absorb heat and then enters the second heating furnace 8 to absorb heat and raise temperature; the steam discharged by the second heating furnace 8 enters the steam turbine 1 to reduce the pressure and do work to a certain degree, then flows through the high-temperature heat regenerator 11 to release heat and reduce the temperature, and then enters the steam turbine 1 to continue reducing the pressure and do work; the low-pressure steam discharged by the steam turbine 1 passes through the evaporator 6 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense, so that the dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 4 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 has a condensate pipeline which is communicated with the evaporator 6 through the booster pump 4, then the evaporator 6 has a steam channel which is communicated with the second steam turbine 2 through the heating furnace 7, the second steam turbine 2 also has a steam channel which is communicated with the second heating furnace 8, the compressor 3 has a steam channel which is communicated with the second heating furnace 8, the second heating furnace 8 also has a steam channel which is communicated with the steam turbine 1, the steam turbine 1 also has a low-pressure steam channel which is communicated with the evaporator 6 and then is divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate of the condenser 5 flows through the booster pump 4 to be boosted, flows through the evaporator 6 to absorb heat and be boosted and vaporized, flows through the heating furnace 7 to continuously absorb heat, flows through the second steam turbine 2 to be decompressed and do work, then enters the second heating furnace 8 to absorb heat and be boosted, and the steam discharged by the compressor 3 enters the second heating furnace 8 to absorb heat and be boosted; the steam discharged by the second heating furnace 8 flows through the steam turbine 1 to reduce the pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 6 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense, so that the dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 5 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a heat supplier; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 is provided with a condensate pipeline, the heating furnace 7 is communicated with the second steam turbine 2 through a steam channel after the condensate pipeline is communicated with the heating furnace 7 through the booster pump 4, the second steam turbine 2 is also communicated with the second heating furnace 8 through a steam channel, the compressor 3 is provided with a steam channel communicated with the second heating furnace 8, the second heating furnace 8 is also provided with a steam channel communicated with the steam turbine 1, and the steam turbine 1 is also provided with a low-pressure steam channel communicated with the heater 12 and then divided into two paths, namely a first path communicated with the compressor 3 and a second path communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, the heat supply device 12 is also communicated with the outside through a heated medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate of the condenser 5 is boosted by the booster pump 4, passes through the heating furnace 7 to absorb heat, raise temperature, vaporize and overheat, passes through the second steam turbine 2 to reduce pressure and do work, then enters the second heating furnace 8 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the second heating furnace 8 to absorb heat and raise temperature; the steam discharged by the second heating furnace 8 flows through the steam turbine 1 to reduce the pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the heat supplier 12 to release heat and reduce the temperature and then is divided into two paths, the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the heating furnace 7 and the second heating furnace 8, the cooling medium takes away low-temperature heat load through the condenser 5, the medium-temperature heat load is taken away by the heated medium through the heater 12, and a dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 6 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 has a condensate pipeline, after the condensate pipeline is communicated with the evaporator 6 through the booster pump 4, the evaporator 6 has a steam channel to communicate with the second steam turbine 2, the second steam turbine 2 also has a steam channel to communicate with the steam turbine 1 through the middle steam inlet port after passing through the heating furnace 7, the compressor 3 has a steam channel to communicate with the second heating furnace 8, the second heating furnace 8 also has a steam channel to communicate with the steam turbine 1, the steam turbine 1 also has a low-pressure steam channel to communicate with the evaporator 6 and then divides into two paths — the first path is communicated with the compressor 3 and the second path is communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate of the condenser 5 flows through the booster pump 4 to be boosted, flows through the evaporator 6 to absorb heat, raise temperature, vaporize and overheat, flows through the second steam turbine 2 to reduce pressure and do work, and flows through the heating furnace 7 to absorb heat, raise temperature and then enters the steam turbine 1 through the middle steam inlet port to reduce pressure and do work; the steam discharged by the compressor 3 flows through the second heating furnace 8 to absorb heat and raise temperature, and then enters the steam turbine 1 to reduce pressure and do work; the low-pressure steam discharged by the steam turbine 1 passes through the evaporator 6 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense, so that the dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 7 is implemented as follows:
(1) structurally, the system mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace 7, the external part is also provided with an air channel which is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the heating furnace 7 is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator 9; the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace 8, the outside is also provided with an air channel which is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and a heating furnace 7, and the second heating furnace 8 is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator 10; the condenser 5 has a condensate pipeline which is communicated with the evaporator 6 through the booster pump 4, then the evaporator 6 has a steam channel which is communicated with the second steam turbine 2, the second steam turbine 2 also has a steam channel which is communicated with the second heating furnace 8 through the heating furnace 7, the compressor 3 has a steam channel which is communicated with the second heating furnace 8 through the heating furnace 7, the second heating furnace 8 also has a steam channel which is communicated with the steam turbine 1, the steam turbine 1 also has a low-pressure steam channel which is communicated with the evaporator 6 and then is divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 5; the condenser 5 is also communicated with the outside through a cooling medium channel, and the steam turbine 1 is connected with the compressor 3 and transmits power.
(2) In the process, external low-grade fuel enters the heating furnace 7, external first path air enters the heating furnace 7 after absorbing heat and raising temperature through the heat source heat regenerator 9, the low-grade fuel and the air are mixed and combusted in the heating furnace 7 to form fuel gas with higher temperature, the fuel gas in the heating furnace 7 releases heat to circulating working media and air flowing through the fuel gas and lowers the temperature, and then the fuel gas flows through the heat source heat regenerator 9 to release heat and lower the temperature and is discharged to the outside; the external high-grade fuel enters a second heating furnace 8, the external second path of air gradually absorbs heat and heats through a second heat source heat regenerator 10 and a heating furnace 7 and then enters the second heating furnace 8, the high-grade fuel and the air are mixed and combusted in the second heating furnace 8 to form high-temperature fuel gas, the high-temperature fuel gas releases heat to the circulating working medium flowing through the high-temperature fuel gas and cools, and then the high-temperature fuel gas flows through the second heat source heat regenerator 10 to release heat, cool and discharge to the outside; the condensate of the condenser 5 is boosted by the booster pump 4, passes through the evaporator 6 to absorb heat, raise temperature, vaporize and overheat, passes through the second steam turbine 2 to reduce pressure and do work, passes through the heating furnace 7 and the second heating furnace 8 to gradually absorb heat and raise temperature, and the steam discharged by the compressor 3 passes through the heating furnace 7 and the second heating furnace 8 to gradually absorb heat and raise temperature; the steam discharged by the second heating furnace 8 flows through the steam turbine 1 to reduce the pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 6 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the heating furnace 7 and the second heating furnace 8, and the cooling medium takes away the low-temperature heat load through the condenser 5; the work output by the steam turbine 1 and the second steam turbine 2 is provided for the compressor 3 and the external actuating power, or the work output by the steam turbine 1 and the second steam turbine 2 is provided for the compressor 3, the booster pump 4 and the external actuating power, so that a dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 8 is implemented as follows:
(1) structurally, in the dual-fuel combined-cycle steam power plant shown in fig. 1, the communication between the steam passage of the second heating furnace 8 and the steam turbine 1 is adjusted so that the second heating furnace 8 has the steam passage to communicate with the steam turbine 1 and then the steam turbine 1 and the reheat steam passage communicate with each other through the second heating furnace 8.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the steam generated by the second heating furnace 8 enters the steam turbine 1 to reduce the pressure and do work to a certain degree, then enters the second heating furnace 8 to absorb heat and raise the temperature, then enters the steam turbine 1 to continue reducing the pressure and doing work, and then is supplied to the evaporator 6 to form the dual-fuel combined cycle steam power device.
The dual fuel combined cycle steam power plant shown in fig. 9 is implemented as follows:
(1) structurally, in the dual-fuel combined cycle steam power plant shown in fig. 1, a low-temperature heat regenerator and a second booster pump are added, the communication between a condensate pipeline of a condenser 5 and the booster pump 4 is adjusted to be that the condenser 5 is communicated with the low-temperature heat regenerator 13 through a condensate pipeline of the second booster pump 14, a steam extraction channel is additionally arranged on the compressor 3 to be communicated with the low-temperature heat regenerator 13, and the low-temperature heat regenerator 13 is communicated with the booster pump 4 through the condensate pipeline.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 5 flows through the second booster pump 14 to be boosted and then enters the low-temperature heat regenerator 13 to be mixed with the extracted steam from the compressor 3, absorb heat and raise temperature, and the extracted steam releases heat to form condensate; the condensate of the low-temperature heat regenerator 13 flows through the booster pump 4 to be boosted, flows through the evaporator 6 to absorb heat, raise temperature, vaporize and overheat, flows through the second steam turbine 2 to reduce pressure and do work, then enters the second heating furnace 8 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the second heating furnace 8 to absorb heat and raise temperature; the steam discharged by the second heating furnace 8 flows through the steam turbine 1 to reduce the pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 6 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path enters the condenser 5 to release heat and condense; the low-pressure steam entering the compressor 3 is subjected to pressure boosting and temperature rising to a certain degree and then divided into two paths, wherein the first path is provided for the low-temperature heat regenerator 13, and the second path is subjected to pressure boosting and temperature rising continuously and then enters the second heating furnace 8 to form the dual-fuel combined cycle steam power device.
The dual fuel combined cycle steam power plant shown in fig. 10 is implemented as follows:
(1) structurally, in the dual fuel combined cycle steam power plant shown in fig. 1, an expansion speed increaser 15 is added in place of the steam turbine 1, a dual energy compressor 16 is added in place of the compressor 3, and a diffuser pipe 17 is added in place of the booster pump 4.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the condensate of the condenser 5 flows through the diffuser pipe 17 to reduce the speed and increase the pressure, flows through the evaporator 6 to absorb heat, raise the temperature, vaporize and overheat, flows through the second steam turbine 2 to reduce the pressure and do work, then enters the second heating furnace 8 to absorb heat and raise the temperature, and the steam discharged by the dual-energy compressor 16 enters the second heating furnace 8 to absorb heat and raise the temperature; the steam discharged by the second heating furnace 8 flows through the expansion speed increaser 15 to reduce the pressure, do work and increase the speed, the low-pressure steam discharged by the expansion speed increaser 15 flows through the evaporator 6 to release heat and reduce the temperature, and then is divided into two paths, wherein the first path enters the dual-energy compressor 16 to increase the pressure, raise the temperature and reduce the speed, and the second path enters the condenser 5 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the heating furnace 7 and the second heating furnace 8, the cooling medium takes away the low-temperature heat load through the condenser 5, and the work output by the second steam turbine 2 and the expansion speed increaser 15 is provided for the dual-energy compressor 16 and the external part as power, so that the dual-fuel combined cycle steam power device is formed.
The dual fuel combined cycle steam power plant shown in fig. 11 is implemented as follows:
(1) structurally, in the dual-fuel combined cycle steam power plant shown in fig. 1, a second heat source heat regenerator is eliminated, an external air channel is communicated with the heating furnace 7 through a heat source heat regenerator 9, and the external air channel is communicated with the second heating furnace 8 through a second heat source heat regenerator 10 and the heating furnace 7, and is adjusted into two paths after the external air channel is communicated with the heat source heat regenerator 9, wherein the first path is communicated with the heating furnace 7, and the second path is communicated with the second heating furnace 8 through the heating furnace 7; the gas channel of the second heating furnace 8 is communicated with the outside through a second heat source heat regenerator 10, and the gas channel of the second heating furnace 8 is adjusted to be communicated with the outside through a heat source heat regenerator 9.
(2) In flow, compared to the dual fuel combined cycle steam power plant shown in fig. 1, the difference is that: the fuel gas discharged by the second heating furnace 8 is discharged to the outside after being discharged and cooled by the heat source heat regenerator 9, the external air is divided into two paths after being heated by the heat source heat regenerator 9, the first path enters the heating furnace 7 to participate in combustion, and the second path is supplied to the second heating furnace 8 to participate in combustion after being heated by the heating furnace 7 to form the dual-fuel combined cycle steam power device.
The effect that the technology of the invention can realize-the dual-fuel combined cycle steam power device provided by the invention has the following effects and advantages:
(1) reasonable collocation, sectional construction and gradual temperature rise, and effectively reduces the irreversible loss of temperature difference in the process of forming a high-temperature heat source.
(2) The low-grade fuel combines the high-grade fuel to provide high-temperature driving heat load for the combined cycle steam power device, and the low-grade fuel exerts the effect of the high-grade fuel, thereby greatly improving the utilization rate of converting the low-grade fuel into mechanical energy.
(3) The investment of high-grade fuel is directly reduced, and the effect is equal to the improvement of the utilization rate of converting the high-grade fuel into mechanical energy.
(4) When the low-grade fuel is used in a subsection mode, the grade of high-temperature fuel gas is effectively improved, and the utilization value of the low-grade fuel is improved.
(5) The utilization value of the fuel is improved, the emission of greenhouse gases and pollutants is reduced, and the energy-saving and emission-reducing benefits are remarkable.
(6) The structure is simple, and the flow is reasonable; the fuel selection range and the use value of the steam power device are improved, and the energy consumption cost is reduced.
(7) The steam power device has the advantages that various technical schemes are provided, the manufacturing cost of the steam power device is favorably reduced, and the technical application range is favorably expanded.

Claims (18)

1. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then the evaporator (6) is further provided with a steam channel to be communicated with a second steam turbine (2), the second steam turbine (2) is also provided with a steam channel to be communicated with a second heating furnace (8), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8), the second heating furnace (8) is also provided with a steam channel to be communicated with a steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel to be communicated with the evaporator (6) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
2. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, a booster pump (4) is communicated with the evaporator (6), then a steam channel of the evaporator (6) is communicated with the second steam turbine (2), the second steam turbine (2) is also provided with a steam channel which is communicated with the second heating furnace (8) through the evaporator (6), the compressor (3) is provided with a steam channel which is communicated with the second heating furnace (8) or communicated with the second heating furnace (8) through the evaporator (6), the second heating furnace (8) is also provided with a steam channel which is communicated with the steam turbine (1), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (6) and then divided into two paths, namely a first path is communicated with the compressor (3) and a second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
3. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then a steam channel of the evaporator (6) is communicated with the second steam turbine (2) through a high-temperature heat regenerator (11), the second steam turbine (2) is also provided with a steam channel which is communicated with the second heating furnace (8) through the high-temperature heat regenerator (11), the compressor (3) is provided with a steam channel which is communicated with the second heating furnace (8) through the high-temperature heat regenerator (11), the second heating furnace (8) is also provided with a steam channel which is communicated with the steam turbine (1), then the steam channel of the steam turbine (1) is communicated with the steam turbine (1) through the high-temperature heat regenerator (11), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (6) and then divided into two paths, wherein the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
4. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then a steam channel of the evaporator (6) is communicated with a second steam turbine (2) through a heating furnace (7), the second steam turbine (2) is also provided with a steam channel which is communicated with a second heating furnace (8), the compressor (3) is provided with a steam channel which is communicated with the second heating furnace (8), the second heating furnace (8) is also provided with a steam channel which is communicated with a steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (6) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
5. The double-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a heat supplier; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condenser pipeline is communicated with the heating furnace (7) through the booster pump (4), then the heating furnace (7) is further provided with a steam channel to be communicated with the second steam turbine (2), the second steam turbine (2) is also provided with a steam channel to be communicated with the second heating furnace (8), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8), the second heating furnace (8) is also provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel to be communicated with the heat supply device (12) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel communicated with the outside, the heat supply device (12) is also provided with a heated medium channel communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
6. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then the evaporator (6) is further provided with a steam channel to be communicated with the second steam turbine (2), the second steam turbine (2) is also provided with a steam channel to be communicated with the steam turbine (1) through a middle steam inlet port after passing through the heating furnace (7), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8), the second heating furnace (8) is also provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel to be communicated with the evaporator (6) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
7. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then the evaporator (6) is further provided with a steam channel to be communicated with a second steam turbine (2), the second steam turbine (2) is also provided with a steam channel which can be communicated with a heating furnace (7) and a second heating furnace (8), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8) through the heating furnace (7), the second heating furnace (8) is also provided with a steam channel to be communicated with a steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel to be communicated with the evaporator (6) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
8. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through the booster pump (4), then the evaporator (6) is further provided with a steam channel to be communicated with the second steam turbine (2), the second steam turbine (2) is further provided with a steam channel to be communicated with the second heating furnace (8) through the evaporator (6) and the heating furnace (7), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8) through the heating furnace (7) or communicated with the second heating furnace (8) through the evaporator (6) and the heating furnace (7), the second heating furnace (8) is further provided with a steam channel to be communicated with the steam turbine (1), and the steam turbine (1) is further provided with a low-pressure steam channel to be communicated with the evaporator (6) and then divided into a first channel to be communicated with the compressor (3) and a second channel to be communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
9. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline which is communicated with the evaporator (6) through a booster pump (4), then a steam channel of the evaporator (6) is communicated with the second steam turbine (2) through a high-temperature regenerator (11), the second steam turbine (2) is also provided with a steam channel which is communicated with the second heating furnace (8) through the high-temperature heat regenerator (11) and the heating furnace (7), the compressor (3) is provided with a steam channel which is communicated with the second heating furnace (8) through the high-temperature heat regenerator (11) and the heating furnace (7), the second heating furnace (8) is also provided with a steam channel which is communicated with the steam turbine (1), then the steam turbine (1) is further provided with a steam channel which is communicated with the steam turbine (1) through the high-temperature heat regenerator (11), the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (6) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
10. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then a steam channel of the evaporator (6) is communicated with a second steam turbine (2) through a heating furnace (7), the second steam turbine (2) is also provided with a steam channel which is communicated with a second heating furnace (8) through the heating furnace (7), the compressor (3) is provided with a steam channel which is communicated with the second heating furnace (8) through the heating furnace (7), the second heating furnace (8) is also provided with a steam channel which is communicated with the steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (6) and then divided into two paths, namely a first path is communicated with the compressor (3) and a second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
11. The double-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, a heating furnace, a second heating furnace, a heat source heat regenerator, a second heat source heat regenerator and a heat supplier; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condenser is communicated with the heating furnace (7) through the booster pump (4), then the heating furnace (7) is further provided with a steam channel to be communicated with the second steam turbine (2), the second steam turbine (2) is also provided with a steam channel to be communicated with the second heating furnace (8) through the heating furnace (7), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8) through the heating furnace (7), the second heating furnace (8) is also provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is also provided with a low-pressure steam channel to be communicated with the heat supply device (12) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel communicated with the outside, the heat supply device (12) is also provided with a heated medium channel communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
12. The dual-fuel combined cycle steam power device mainly comprises a steam turbine, a second steam turbine, a compressor, a booster pump, a condenser, an evaporator, a heating furnace, a second heating furnace, a heat source heat regenerator and a second heat source heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with the heating furnace (7), the external part is also provided with an air channel which is communicated with the heating furnace (7) through a heat source heat regenerator (9), and the heating furnace (7) is also provided with a fuel gas channel which is communicated with the external part through the heat source heat regenerator (9); the outside is also provided with a high-grade fuel channel which is communicated with a second heating furnace (8), the outside is also provided with an air channel which is communicated with the second heating furnace (8) through a second heat source heat regenerator (10) and a heating furnace (7), and the second heating furnace (8) is also provided with a fuel gas channel which is communicated with the outside through the second heat source heat regenerator (10); the condenser (5) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (6) through a booster pump (4), then the evaporator (6) is further provided with a steam channel to be communicated with the second steam turbine (2), the second steam turbine (2) is further provided with a steam channel to be communicated with the steam turbine (1) through a middle steam inlet port after passing through the heating furnace (7), the compressor (3) is provided with a steam channel to be communicated with the second heating furnace (8) through the heating furnace (7), the second heating furnace (8) is further provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is further provided with a low-pressure steam channel to be communicated with the evaporator (6) and then divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (5); the condenser (5) is also provided with a cooling medium channel which is communicated with the outside, and the steam turbine (1) is connected with the compressor (3) and transmits power to form a dual-fuel combined cycle steam power device.
13. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices of claims 1 to 12, a second heating furnace (8) is provided with a steam channel to be communicated with a steam turbine (1) and adjusted to be that the second heating furnace (8) is provided with a steam channel to be communicated with the steam turbine (1), and then the steam turbine (1) is also provided with a reheated steam channel to be communicated with the steam turbine (1) through a heating furnace (7) to form the dual-fuel combined cycle steam power device.
14. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices of claims 1 to 12, a second heating furnace (8) is provided with a steam passage to be communicated with a steam turbine (1) and adjusted to be that the second heating furnace (8) is provided with a steam passage to be communicated with the steam turbine (1), and then the steam turbine (1) is also provided with a reheated steam passage to be communicated with the steam turbine (1) through the second heating furnace (8) to form the dual-fuel combined cycle steam power device.
15. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices in claims 1-12, a second heating furnace (8) is provided with a steam channel to be communicated with a steam turbine (1) and is adjusted to be that after the second heating furnace (8) is provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is also provided with a reheating steam channel to be communicated with the steam turbine through a heating furnace (7) and the second heating furnace (8), so that the dual-fuel combined cycle steam power device is formed.
16. A dual-fuel combined cycle steam power device is characterized in that a low-temperature heat regenerator and a second booster pump are added in any dual-fuel combined cycle steam power device of claims 1-15, a condenser (5) is communicated with the booster pump (4) through a condensate pipeline, the condenser (5) is adjusted to be communicated with the low-temperature heat regenerator (13) through the second booster pump (14), a steam extraction channel is additionally arranged on a compressor (3) and is communicated with the low-temperature heat regenerator (13), and the low-temperature heat regenerator (13) is further communicated with the booster pump (4) through the condensate pipeline, so that the dual-fuel combined cycle steam power device is formed.
17. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices in claims 1-15, an expansion speed increaser (15) is added to replace a steam turbine (1), a dual-energy compressor (16) is added to replace a compressor (3), a diffuser pipe (17) is added to replace a booster pump (4), and the dual-fuel combined cycle steam power device is formed.
18. A dual-fuel combined cycle steam power device is characterized in that in any one of the dual-fuel combined cycle steam power devices of claims 1 to 17, a second heat source heat regenerator is omitted, an external air channel is communicated with a heating furnace (7) through a heat source heat regenerator (9), and the external air channel is communicated with a second heating furnace (8) through a second heat source heat regenerator (10) and the heating furnace (7), and is adjusted into two paths after the external air channel is communicated with the heat source heat regenerator (9), wherein the first path is communicated with the heating furnace (7), and the second path is communicated with the second heating furnace (8) through the heating furnace (7); and a fuel gas channel of the second heating furnace (8) is communicated with the outside through a second heat source heat regenerator (10) and adjusted to be communicated with the outside through a heat source heat regenerator (9) of the second heating furnace (8), so that the dual-fuel combined cycle steam power device is formed.
CN202210119738.4A 2021-02-07 2022-01-28 Dual-fuel combined cycle steam power device Pending CN114909194A (en)

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CN202110191433 2021-02-07
CN202110191433X 2021-02-07

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