CN115217555A - Dual-fuel combined cycle power plant - Google Patents

Dual-fuel combined cycle power plant Download PDF

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Publication number
CN115217555A
CN115217555A CN202210063870.8A CN202210063870A CN115217555A CN 115217555 A CN115217555 A CN 115217555A CN 202210063870 A CN202210063870 A CN 202210063870A CN 115217555 A CN115217555 A CN 115217555A
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China
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communicated
heating furnace
channel
air heating
boiler
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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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/006—Auxiliaries or details not otherwise provided for
    • 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/04—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled condensation heat from one cycle heating the fluid in another cycle
    • 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)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

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

Description

Dual-fuel combined cycle power plant
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 high-quality fuel into thermal energy by combustion and the efficient conversion of thermal energy into mechanical energy by a gas-steam power plant are important means for providing human power or electric power.
The fuel has different types and different properties, wherein the temperature of fuel gas formed by burning the fuel directly determines the heat power conversion efficiency; from the view of the temperature of fuel gas formed by combustion (such as constant pressure combustion temperature), high-grade fuel with high constant pressure combustion temperature can convert more mechanical energy corresponding to a high-grade heat source; low-grade fuel with low constant pressure combustion temperature is difficult to form high-temperature combustion products, and can convert less mechanical energy corresponding to a low-grade heat source compared with the former.
When high-temperature heat load is provided for a gas-steam power plant by adopting high-grade fuel, the difference between the temperature of combustion-supporting medium (such as air) and the constant-pressure combustion temperature of the fuel is large in the combustion process of forming a high-temperature heat source by the high-grade fuel due to the limitation of the working principle or material properties or equipment manufacturing level, and the large temperature difference irreversible loss exists in the combustion process, so that the quality loss in fuel utilization is caused, however, 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 power device which reasonably matches and uses low-grade fuel and high-grade fuel, realizes the complementation of advantages and shortages, greatly improves the heat power conversion efficiency of the low-grade fuel, reduces the emission of greenhouse gases and can effectively reduce the fuel cost.
The invention content is as follows:
the invention mainly aims to provide a dual-fuel combined cycle power device, and the specific invention contents are explained in the following items:
1. the dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator and a second heat source heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through a boiler, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through a high-temperature heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
2. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator and the boiler, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator and the warm heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
3. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator and the boiler, then the expander is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator, and the expander and the circulating working medium channel are communicated with the compressor through the high-temperature heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
4. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the air heating furnace is communicated with the air heating furnace by a low-grade fuel, the external part of the air heating furnace is communicated with the air heating furnace by a heat source heat regenerator, the external part of the air heating furnace is communicated with the external part by a fuel gas channel, the external part of the air heating furnace is communicated with the boiler by a high-grade fuel channel, the external part of the air heating furnace is communicated with the boiler by a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the external part by a fuel gas channel; the compressor is provided with a circulating working medium channel which is communicated with the expander through the boiler, the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator and the high-temperature heat exchanger, and then the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
5. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the boiler, then the expander is provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat exchanger, and then the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
6. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator and a second heat source heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the air heating furnace and the boiler, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is further 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 condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
7. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator, the air heating furnace and the boiler, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator and the warm heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
8. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the air heating furnace, the high-temperature heat regenerator and the boiler, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator and the warm heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
9. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the air heating furnace is communicated with the air heating furnace by a low-grade fuel, the external part of the air heating furnace is communicated with the air heating furnace by a heat source heat regenerator, the external part of the air heating furnace is communicated with the external part by a fuel gas channel, the external part of the air heating furnace is communicated with the boiler by a high-grade fuel channel, the external part of the air heating furnace is communicated with the boiler by a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the external part by a fuel gas channel; the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator, the air heating furnace and the boiler, then the expander is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator, and the expander and the circulating working medium channel are communicated with the compressor through the high-temperature heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
10. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the air heating furnace is communicated with the air heating furnace by a low-grade fuel, the external part of the air heating furnace is communicated with the air heating furnace by a heat source heat regenerator, the external part of the air heating furnace is communicated with the external part by a fuel gas channel, the external part of the air heating furnace is communicated with the boiler by a high-grade fuel channel, the external part of the air heating furnace is communicated with the boiler by a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the external part by a fuel gas channel; the compressor is provided with a circulating working medium channel which is communicated with the expander through the air heating furnace, the high-temperature heat regenerator and the boiler, then the expander is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator, and the expander and the circulating working medium channel are communicated with the compressor through the high-temperature heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
11. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the air heating furnace and the boiler, the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator and the high-temperature heat exchanger, and then the compressor is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
12. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part of the boiler is communicated with the outside through a second heat source heat regenerator and the air heating furnace, and the boiler is also communicated with the outside through the second heat source heat regenerator; the compressor is provided with a circulating working medium channel which is communicated with the expander through the air heating furnace and the boiler, then the expander is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator, and the expander is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat exchanger and then is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger through a booster pump, then the high-temperature heat exchanger is communicated with a steam turbine through a steam channel, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and transmits power to form the dual-fuel combined cycle power device.
13. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices in items 1 to 12, a high-temperature heat exchanger is adjusted to be communicated with a steam turbine through a steam channel, and the high-temperature heat exchanger is adjusted to be communicated with the steam turbine through an air heating furnace, so that the dual-fuel combined cycle power device is formed.
14. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices in items 1 to 12, a high-temperature heat exchanger is provided with a steam channel to be communicated with a steam turbine, the communication is adjusted to be that the steam channel of the steam turbine is communicated with the steam turbine after the high-temperature heat exchanger is provided with the steam channel to be communicated with the steam turbine, and then the steam turbine is further provided with the steam channel to be communicated with the power device through an air heating furnace, so that the dual-fuel combined cycle power device is formed.
15. A dual-fuel combined cycle power device is characterized in that a second booster pump and a low-temperature heat regenerator are added in any one of the dual-fuel combined cycle power devices in items 1-14, a condenser with a condensate liquid pipeline communicated with the booster pump is adjusted to be communicated with a condenser with a condensate liquid pipeline communicated with the low-temperature heat regenerator through the second booster pump, a steam extraction channel of a steam turbine is arranged to be communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the booster pump through the condensate liquid pipeline, so that the dual-fuel combined cycle power device is formed.
16. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices in items 1 to 14, an expansion acceleration steam turbine is added to replace the steam turbine, a diffusion pipe is added to replace a booster pump, and the dual-fuel combined cycle power device is formed.
17. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices 1-16, an expansion speed increaser is added to replace an expander, and a dual-energy compressor is added to replace a compressor, so that the dual-fuel combined cycle power device is formed.
18. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices 1 to 17, a second heat source heat regenerator is cancelled, an external air channel is communicated with an air heating furnace through the heat source heat regenerator, and the external air channel is communicated with a boiler through the second heat source heat regenerator and the air heating furnace, and is adjusted into two paths after the external air channel is communicated with the heat source heat regenerator, wherein the first path is communicated with the air heating furnace, and the second path is communicated with the boiler through the air heating furnace; and adjusting the communication between the boiler gas channel and the outside through a second heat source heat regenerator to ensure that the boiler gas channel is communicated with the outside through the heat source heat regenerator to form the dual-fuel combined cycle power device.
Description of the drawings:
FIG. 1 is a schematic thermodynamic system diagram of a dual fuel combined cycle power plant 1 provided in accordance with the present invention.
FIG. 2 is a schematic thermodynamic system diagram of a dual fuel combined cycle power plant of type 2 provided in accordance with the present invention.
FIG. 3 is a schematic thermodynamic system diagram of a dual fuel combined cycle power plant of type 3 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 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 power plant provided in accordance with the present invention.
FIG. 6 is a 6 th principle thermodynamic system diagram of a dual fuel combined cycle 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 power plant provided in accordance with the present invention.
FIG. 8 is a diagram of the 8 th principle thermodynamic system of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 9 is a diagram of a 9 th principle thermodynamic system of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 10 is a 10 th principle thermodynamic system diagram of a dual fuel combined cycle 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 power plant provided in accordance with the present invention.
FIG. 12 is a 12 th principle thermodynamic system diagram of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 13 is a 13 th principle thermodynamic system diagram of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 14 is a 14 th principle thermodynamic system diagram of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 15 is a 15 th principle thermodynamic system diagram of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 16 is a 16 th principle thermodynamic system diagram of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 17 is a diagram of a 17 th principle thermodynamic system of a dual fuel combined cycle power plant provided in accordance with the present invention.
FIG. 18 is a diagram of an 18 th principle thermodynamic system of a dual fuel combined cycle power plant provided in accordance with the present invention.
In the figure, 1-a steam turbine, 2-a booster pump, 3-a high-temperature heat exchanger, 4-a condenser, 5-a compressor, 6-an expander, 7-an air heating furnace, 8-a boiler, 9-a heat source regenerator, 10-a second heat source regenerator, 11-a high-temperature regenerator, 12-a second booster pump, 13-a low-temperature regenerator, 14-an expansion speed-increasing steam turbine, 15-a diffuser pipe, 16-an expansion speed-increasing machine and 17-a dual-energy compressor.
Regarding the expansion speed-increasing turbine, the air heating furnace, the heat source regenerator, the low-grade fuel and the high-grade fuel, the following brief descriptions are given here:
(1) To reveal the difference in the operating mechanism between the steam turbine 1 and the expansion acceleration steam turbine 14, the following explanation is made here:
(1) 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 2 can be provided by the steam turbine 1 through mechanical transmission or from the outside.
(2) In contrast, in fig. 16, the steam at the outlet of the expansion speed-increasing turbine 14 also has a very low pressure, but a relatively large flow rate (a part of the pressure drop is converted into the kinetic energy of the low-pressure steam) to meet the requirement of reducing the speed and increasing the pressure of the diffuser 15.
(3) The process of the steam flowing through the turbine 1 to realize the thermal variable work in fig. 1 adopts the decompression work, and the process of the steam flowing through the expansion speed-increasing turbine 14 to realize the thermal variable work in fig. 16 adopts the decompression work and speed-increasing.
(2) Description of air heating furnace and heat source regenerator:
(1) according to the requirement, a related heat exchanger (heat exchange tube bundle) is arranged in the air heating furnace; as shown in fig. 13, the superheater that heats the steam from the high-temperature heat exchanger 3, and the reheater that heats the steam from the steam turbine 1 in fig. 14.
(2) The specific heat exchange tube bundle (superheater or reheater) is not specifically designated, but is collectively expressed as an air heating furnace.
(3) In the application of the invention, the air heating furnace 7 provides the heat load of the initial section of the high-temperature heat source and undertakes the task of heating the air entering the boiler 8; in some cases, the heating task of the circulating steam of the bottom Rankine cycle subsystem is also undertaken.
(4) The heat source regenerator relates to the temperature grade of the gas in the air heating furnace and the boiler, which are listed separately.
(3) Description of the fuels:
(1) low-grade fuel: refers to a fuel with relatively low highest temperature (such as adiabatic combustion temperature or constant pressure combustion temperature) formed by combustion products, such as coal gangue, coal slime, combustible garbage and the like. 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.
(2) High-grade fuel: refers to a fuel such as high quality coal, natural gas, methane, hydrogen, etc., that has a relatively high maximum temperature at which combustion products can form (e.g., adiabatic combustion temperature or fixed pressure combustion temperature). 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.
(3) For solid fuels, the gaseous substances of the combustion products are the core of the heat source and are important components of the thermodynamic system; the solid substances in the combustion products, such as the waste slag, contained in the heat energy is discharged after being utilized (the utilization process and the equipment are contained in the boiler, or the air is preheated outside the boiler body), and the solid substances do not need to be listed separately, and the functions of the solid substances are not expressed separately.
(4) The grade of the fuel is divided by the highest temperature formed by combustion products minus the temperature difference of indirect heat transfer, 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 description is not repeated if 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 power plant shown in fig. 1 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator and a second heat source heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the boiler 8, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat exchanger 3; the condenser 4 is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger 3 through the booster pump 2, then the high-temperature heat exchanger 3 is 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 condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In the process, external low-grade fuel enters the air heating furnace 7, a first path of external air enters the air 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 air heating furnace 7 to form fuel gas with higher temperature, the fuel gas in the air heating furnace 7 releases heat to the other path of air flowing through the air 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 second path of air flows through a second heat source heat regenerator 10 and the air heating furnace 7 to gradually absorb heat and raise temperature, and then enters the boiler 8; external high-grade fuel enters a boiler 8, is mixed with air from an air heating furnace 7 and is combusted into high-temperature fuel gas, the high-temperature fuel gas generated by the boiler 8 releases heat to a circulating working medium flowing through the boiler, and then flows through a second heat source regenerator 10 to release heat, reduce temperature and be discharged outwards; the circulating working medium discharged by the compressor 5 absorbs heat and heats through the boiler 8, reduces pressure and works through the expander 6, releases heat and cools through the high-temperature heat exchanger 3, and then enters the compressor 5 to increase pressure and heat; the condensate of the condenser 4 is boosted by the booster pump 2, and then is absorbed by the high-temperature heat exchanger 3 to absorb heat, raise temperature, vaporize and overheat, and then enters the steam turbine 1 to reduce pressure and do work, and the low-pressure steam discharged by the steam turbine 1 enters the condenser 4 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through an air heating furnace 7 and a boiler 8, cooling medium takes away the low-temperature heat load through a condenser 4, and air and fuel gas take away the low-temperature heat load through an inlet and outlet flow; the work output by the steam turbine 1 and the expander 6 is provided for the compressor 5 and the external power, or the work output by the steam turbine 1 and the expander 6 is provided for the booster pump 2, the compressor 5 and the external power, so that a dual-fuel combined cycle power device is formed.
The dual fuel combined cycle power plant shown in fig. 2 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the high-temperature heat regenerator 11 and the boiler 8, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat regenerator 11 and the warm heat exchanger 3; after a condensate pipeline of the condenser 4 is communicated with the high-temperature heat exchanger 3 through the booster pump 2, a steam channel of the high-temperature heat exchanger 3 is communicated with the steam turbine 1, and a low-pressure steam channel of the steam turbine 1 is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) Compared with the dual-fuel combined cycle power plant shown in fig. 1, the difference in the flow is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats through the high-temperature heat regenerator 11 and the boiler 8, gradually releases heat and cools through the expander 6, and then enters the compressor 5 to boost pressure and heat to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 3 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the high-temperature heat regenerator 11 and the boiler 8, then the expander 6 is provided with a circulating working medium channel which is communicated with the expander 6 through the high-temperature heat regenerator 11, and the expander 6 and the circulating working medium channel are communicated with the compressor 5 through the high-temperature heat exchanger 3; after a condensate pipeline of the condenser 4 is communicated with the high-temperature heat exchanger 3 through the booster pump 2, a steam channel of the high-temperature heat exchanger 3 is communicated with the steam turbine 1, and a low-pressure steam channel of the steam turbine 1 is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats up through the high-temperature heat regenerator 11 and the boiler 8, enters the expander 6 to reduce the pressure and do work to a certain degree, then flows through the high-temperature heat regenerator 11 to release heat and cool down, and then enters the expander 6 to continue reducing the pressure and do work; the circulating working medium discharged by the expander 6 passes through the high-temperature heat exchanger 3 to release heat and reduce temperature, and then enters the compressor 5 to boost pressure and raise temperature to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 4 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the boiler 8, the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 3, and then the compressor 5 is further provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator 11; the condenser 4 is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger 3 through the booster pump 2, then the high-temperature heat exchanger 3 is 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 condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) Compared with the dual-fuel combined cycle power plant shown in fig. 1, the difference in the flow is that: the circulating working medium discharged by the compressor 5 absorbs heat and heats through the boiler 8, reduces the pressure and works through the expander 6, gradually releases heat and lowers the temperature through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 3, enters the compressor 5 to increase the pressure and heat to a certain degree, then flows through the high-temperature heat regenerator 11 to absorb heat and raise the temperature, and then enters the compressor 5 to continuously increase the pressure and heat to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 5 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel by the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel by the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the boiler 8, then the expander 6 is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator 11, and the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the high-temperature heat exchanger 3 and then is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator 11; after a condensate pipeline of the condenser 4 is communicated with the high-temperature heat exchanger 3 through the booster pump 2, a steam channel of the high-temperature heat exchanger 3 is communicated with the steam turbine 1, and a low-pressure steam channel of the steam turbine 1 is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) Compared with the dual-fuel combined cycle power plant shown in fig. 1, the difference in the flow is that: the circulating working medium discharged by the compressor 5 absorbs heat and heats up through the boiler 8, enters the expander 6 to reduce pressure and do work to a certain degree, then flows through the high-temperature heat regenerator 11 to release heat and reduce temperature, and then enters the expander 6 to continue reducing pressure and do work; the circulating working medium discharged by the expander 6 passes through the high-temperature heat exchanger 3 to release heat and reduce temperature, enters the compressor 5 to be boosted and heated to a certain degree, then passes through the high-temperature heat regenerator 11 to absorb heat and be heated, and then enters the compressor 5 to be continuously boosted and heated to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 6 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator and a second heat source heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the air heating furnace 7 and the boiler 8, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat exchanger 3; the condenser 4 is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger 3 through the booster pump 2, then the high-temperature heat exchanger 3 is 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 condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats through the air heating furnace 7 and the boiler 8, reduces pressure and works through the expander 6, releases heat and cools through the high-temperature heat exchanger 3, and then enters the compressor 5 to increase pressure and heat to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 7 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel by the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel by the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the high-temperature heat regenerator 11, the air heating furnace 7 and the boiler 8, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat regenerator 11 and the warm heat exchanger 3; after a condensate pipeline of the condenser 4 is communicated with the high-temperature heat exchanger 3 through the booster pump 2, a steam channel of the high-temperature heat exchanger 3 is communicated with the steam turbine 1, and a low-pressure steam channel of the steam turbine 1 is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats through the high-temperature heat regenerator 11, the air heating furnace 7 and the boiler 8, gradually reduces pressure and works through the expander 6, gradually releases heat and cools through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 3, and then enters the compressor 5 to increase pressure and heat to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 8 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel by the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel by the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the air heating furnace 7, the high-temperature heat regenerator 11 and the boiler 8, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat regenerator 11 and the warm heat exchanger 3; the condenser 4 is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger 3 through the booster pump 2, then the high-temperature heat exchanger 3 is 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 condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) Compared with the dual-fuel combined cycle power plant shown in fig. 1, the difference in the flow is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats through the air heating furnace 7, the high-temperature heat regenerator 11 and the boiler 8, gradually reduces pressure and works through the expander 6, gradually releases heat and cools through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 3, and then enters the compressor 5 to increase pressure and heat to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 9 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the high-temperature heat regenerator 11, the air heating furnace 7 and the boiler 8, then the expander 6 is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator 11, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat exchanger 3; after a condensate pipeline of the condenser 4 is communicated with the high-temperature heat exchanger 3 through the booster pump 2, a steam channel of the high-temperature heat exchanger 3 is communicated with the steam turbine 1, and a low-pressure steam channel of the steam turbine 1 is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats up through the high-temperature heat regenerator 11, the air heating furnace 7 and the boiler 8, enters the expander 6 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 expander 6 to continue reducing the pressure and do work; the circulating working medium discharged by the expander 6 passes through the high-temperature heat exchanger 3 to release heat and reduce temperature, and then enters the compressor 5 to increase pressure and temperature, so that the dual-fuel combined cycle power device is formed.
The dual fuel combined cycle power plant shown in fig. 10 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the air heating furnace 7, the high-temperature heat regenerator 11 and the boiler 8, then the expander 6 is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator 11, and the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat exchanger 3; the condenser 4 is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger 3 through the booster pump 2, then the high-temperature heat exchanger 3 is 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 condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats up through the air heating furnace 7, the high-temperature heat regenerator 11 and the boiler 8, enters the expansion machine 6 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 expansion machine 6 to continue reducing the pressure and do work; the circulating working medium discharged by the expander 6 passes through the high-temperature heat exchanger 3 to release heat and reduce temperature, and then enters the compressor 5 to boost pressure and raise temperature to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 11 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the air heating furnace 7 and the boiler 8, the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 3, and then the circulating working medium channel of the compressor 5 is communicated with the expander through the high-temperature heat regenerator 11; the condenser 4 is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger 3 through the booster pump 2, then the high-temperature heat exchanger 3 is 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 condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats through the air heating furnace 7 and the boiler 8, gradually absorbs heat and heats through the expansion machine 6, reduces pressure and works, gradually releases heat and cools through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 3, enters the compressor 5 to increase the pressure and the temperature to a certain degree, then passes through the high-temperature heat regenerator 11 to absorb heat and heat, and then enters the compressor 5 to continue increasing the pressure and the temperature, so that the dual-fuel combined cycle power device is formed.
The dual fuel combined cycle power plant shown in fig. 12 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with an air heating furnace 7 by low-grade fuel, the external part is also communicated with the air heating furnace 7 by an air channel through a heat source heat regenerator 9, the air heating furnace 7 is also communicated with the external part by a fuel gas channel through the heat source heat regenerator 9, the external part is also communicated with a boiler 8 by a high-grade fuel channel, the external part is also communicated with the boiler 8 by a second heat source heat regenerator 10 and the air heating furnace 7, and the boiler 8 is also communicated with the external part by the fuel gas channel through the second heat source heat regenerator 10; the compressor 5 is provided with a circulating working medium channel which is communicated with the expander 6 through the air heating furnace 7 and the boiler 8, then the expander 6 is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator 11, the expander 6 is also provided with a circulating working medium channel which is communicated with the compressor 5 through the high-temperature heat exchanger 3, and then the compressor 5 is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator 11; after a condensate pipeline of the condenser 4 is communicated with the high-temperature heat exchanger 3 through the booster pump 2, a steam channel of the high-temperature heat exchanger 3 is communicated with the steam turbine 1, and a low-pressure steam channel of the steam turbine 1 is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, and the expander 6 is connected with the compressor 5 and transmits power.
(2) Compared with the dual-fuel combined cycle power plant shown in fig. 1, the difference in the flow is that: the circulating working medium discharged by the compressor 5 gradually absorbs heat and heats up through the air heating furnace 7 and the boiler 8, enters the expander 6 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 expander 6 to continue reducing the pressure and do work; the circulating working medium discharged by the expander 6 passes through the high-temperature heat exchanger 3 to release heat and reduce temperature, enters the compressor 5 to be boosted and heated to a certain degree, then passes through the high-temperature heat regenerator 11 to absorb heat and be heated, and then enters the compressor 5 to be continuously boosted and heated to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 13 is implemented as follows:
(1) Structurally, in the dual fuel combined cycle power plant shown in fig. 1, the high temperature heat exchanger 3 having a steam passage communicating with the steam turbine 1 is adjusted so that the high temperature heat exchanger 3 having a steam passage communicating with the steam turbine 1 via the air heating furnace 7.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the steam discharged by the high-temperature heat exchanger 3 flows through the air heating furnace 7 to absorb heat and raise temperature, and then enters the steam turbine 1 to reduce pressure and do work, so that the dual-fuel combined cycle power device is formed.
The dual fuel combined cycle power plant shown in fig. 14 is implemented as follows:
(1) Structurally, in the dual-fuel combined cycle power plant shown in fig. 1, the high-temperature heat exchanger 3 having the steam passage communicating with the steam turbine 1 is adjusted so that the steam passage of the steam turbine 1 is communicated with itself through the air heating furnace 7 after the high-temperature heat exchanger 3 having the steam passage communicating with the steam turbine 1.
(2) Compared with the dual-fuel combined cycle power plant shown in fig. 1, the difference in the flow is that: the steam discharged by the high-temperature heat exchanger 3 enters the steam turbine 1 to reduce pressure and work to a certain degree, then flows through the air heating furnace 7 to absorb heat and raise temperature, and then enters the steam turbine 1 to continue reducing pressure and work to form the dual-fuel combined cycle power device.
The dual fuel combined cycle power plant shown in fig. 15 is implemented as follows:
(1) Structurally, in the dual-fuel combined cycle power plant shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, the condenser 4 is adjusted to be communicated with the booster pump 2 through a condensate pipeline, the condenser 4 is adjusted to be communicated with the low-temperature heat regenerator 13 through a second booster pump 12, the steam turbine 1 is provided with a steam extraction channel to be communicated with the low-temperature heat regenerator 13, and the low-temperature heat regenerator 13 is communicated with the booster pump 2 through the condensate pipeline.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 4 flows through the second booster pump 12 to be boosted and then enters the low-temperature heat regenerator 13 to be mixed with the extracted steam from the steam turbine 1, 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 2 to be boosted, flows through the high-temperature heat exchanger 3 to absorb heat, raise temperature, vaporize and overheat, and then enters the steam turbine 1 to be decompressed and work; the steam entering the steam turbine 1 is decompressed and does work to a certain degree and then is divided into two paths, the first path is provided for the low-temperature heat regenerator 13, and the second path continues to be decompressed and does work and then enters the condenser 4 to release heat and condense, so that the dual-fuel combined cycle power device is formed.
The dual fuel combined cycle power plant shown in fig. 16 is implemented as follows:
(1) Structurally, in the dual fuel combined cycle power plant shown in fig. 1, an expansion acceleration turbine 14 is added in place of the turbine 1, and a diffuser 15 is added in place of the booster pump 2.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the condensate of the condenser 4 flows through the diffuser pipe 15 for speed reduction and pressure increase, flows through the high-temperature heat exchanger 3 for heat absorption, temperature rise, vaporization and overheating, flows through the expansion speed-increasing turbine 14 for pressure reduction, work application and speed increase, and then enters the condenser 4 for heat release and condensation; the work output by the expansion machine 6 and the expansion speed-increasing turbine 14 is provided for the compressor 5 and external power, and a dual-fuel combined cycle power device is formed.
The dual fuel combined cycle power plant shown in fig. 17 is implemented as follows:
(1) Structurally, in the dual fuel combined cycle power plant shown in fig. 1, an expansion speed increaser 16 is added in place of the expansion machine 6, and a dual energy compressor 17 is added in place of the compressor 5.
(2) In flow, compared to the dual fuel combined cycle power plant shown in fig. 1, the difference is that: the circulating working medium discharged by the dual-energy compressor 17 absorbs heat and heats through the boiler 8, reduces pressure and works and increases speed through the expansion speed-increasing machine 16, releases heat and reduces temperature through the high-temperature heat exchanger 3, then enters the dual-energy compressor 17 to increase pressure and heat and reduce speed, the work output by the steam turbine 1 and the expansion speed-increasing machine 16 is provided for the dual-energy compressor 17 and external acting power, or the work output by the steam turbine 1 and the expansion speed-increasing machine 16 is provided for the booster pump 2, the dual-energy compressor 17 and external acting power, and a dual-fuel combined circulating power device is formed.
The dual fuel combined cycle power plant shown in fig. 18 is implemented as follows:
(1) Structurally, in the dual-fuel combined cycle power plant shown in fig. 1, a second heat source heat regenerator is omitted, an external air channel is communicated with an air heating furnace 7 through a heat source heat regenerator 9, and the external air channel is communicated with a boiler 8 through a second heat source heat regenerator 10 and the air 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 air heating furnace 7, and the second path is communicated with the boiler 8 through the air heating furnace 7; the gas channel of the boiler 8 is communicated with the outside through a second heat source heat regenerator 10, and the gas channel of the boiler 8 is adjusted to be communicated with the outside through a heat source heat regenerator 9.
(2) In the flow, compared with the dual fuel combined cycle power plant shown in fig. 1, the difference lies in that: the fuel gas discharged by the boiler 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 air heating furnace 7 to participate in combustion, and the second path enters the boiler 8 to participate in combustion after being heated by the air heating furnace 7 to absorb heat, so that the dual-fuel combined cycle power device is formed.
The effect that the technology of the invention can realize-the dual-fuel combined cycle power device provided by the invention has the following effects and advantages:
(1) The low-grade fuel and the high-grade fuel are reasonably matched, a high-temperature heat source is jointly built, and the fuel cost is effectively reduced.
(2) The high-temperature thermal load is utilized in a grading manner, so that the irreversible loss of temperature difference is obviously reduced, and the thermal power change efficiency is effectively improved.
(3) The low-grade fuel completes air temperature increase and provides for the high-grade fuel, and the irreversible loss of temperature difference in the combustion process of the high-grade fuel is effectively reduced.
(4) The low-grade fuel combines the high-grade fuel to provide high-temperature driving heat load for the dual-fuel combined cycle power device, the low-grade fuel exerts the effect of the high-grade fuel, and the economic value of converting the low-grade fuel into mechanical energy is greatly improved.
(5) The low-grade fuel can be used for or is beneficial to reducing the compression ratio of the top gas power cycle system, improving the flow of gas cycle working medium and constructing a large-load combined cycle power device.
(6) The investment of high-grade fuel is directly reduced, and the effect is equal to the improvement of the utilization rate of the high-grade fuel converted into mechanical energy.
(7) When the low-grade fuel is independently utilized, the grade of high-temperature fuel gas can be obviously improved, and the utilization value of the low-grade fuel is improved.
(8) The fuel selection range and the use value are improved, and the energy consumption cost of the device is reduced.
(9) 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.
(10) The device has the advantages of simple structure, reasonable flow, rich scheme and contribution to reducing the manufacturing cost of the device and expanding the technical application range.

Claims (18)

1. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator and a second heat source heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the boiler (8), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
2. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the high-temperature heat regenerator (11) and the boiler (8), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat regenerator (11) and the warm heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
3. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the high-temperature heat regenerator (11) and the boiler (8), then the expander (6) is provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator (11), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
4. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the boiler (8), the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat regenerator (11) and the high-temperature heat exchanger (3), and then the compressor (5) is provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator (11); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
5. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with low-grade fuel which is communicated with an air heating furnace (7), the external part is also provided with an air channel which is communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air 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 external part is also provided with a high-grade fuel channel which is communicated with a boiler (8), the external part is also provided with an air channel which is communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also provided with a fuel gas channel which is communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the boiler (8), then the expander (6) is provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator (11), the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3), and then the compressor (5) is provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator (11); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
6. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator and a second heat source heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a cycle medium channel which is communicated with the expander (6) through the air heating furnace (7) and the boiler (8), and the expander (6) is also provided with a cycle medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
7. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the high-temperature heat regenerator (11), the air heating furnace (7) and the boiler (8), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat regenerator (11) and the warm heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
8. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the air heating furnace (7), the high-temperature heat regenerator (11) and the boiler (8), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat regenerator (11) and the warm heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
9. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the high-temperature heat regenerator (11), the air heating furnace (7) and the boiler (8), then the expander (6) is further provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator (11), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
10. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is communicated with a low-grade fuel and an air heating furnace (7), the external part is also communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air heating furnace (7) is also communicated with the external part through a fuel gas channel, the external part is also communicated with a high-grade fuel channel and a boiler (8), the external part is also communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the air heating furnace (7), the high-temperature heat regenerator (11) and the boiler (8), then the expander (6) is further provided with a circulating working medium channel which is communicated with the expander through the high-temperature heat regenerator (11), and the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
11. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with low-grade fuel which is communicated with an air heating furnace (7), the external part is also provided with an air channel which is communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air 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 external part is also provided with a high-grade fuel channel which is communicated with a boiler (8), the external part is also provided with an air channel which is communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also provided with a fuel gas channel which is communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the air heating furnace (7) and the boiler (8), the expander (6) is also provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat regenerator (11) and the high-temperature heat exchanger (3), and then the compressor (5) is also provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator (11); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
12. The dual-fuel combined cycle power device mainly comprises a steam turbine, a booster pump, a high-temperature heat exchanger, a condenser, a compressor, an expander, an air heating furnace, a boiler, a heat source heat regenerator, a second heat source heat regenerator and a high-temperature heat regenerator; the external part is provided with low-grade fuel which is communicated with an air heating furnace (7), the external part is also provided with an air channel which is communicated with the air heating furnace (7) through a heat source heat regenerator (9), the air 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 external part is also provided with a high-grade fuel channel which is communicated with a boiler (8), the external part is also provided with an air channel which is communicated with the boiler (8) through a second heat source heat regenerator (10) and the air heating furnace (7), and the boiler (8) is also provided with a fuel gas channel which is communicated with the external part through the second heat source heat regenerator (10); the compressor (5) is provided with a circulating working medium channel which is communicated with the expander (6) through the air heating furnace (7) and the boiler (8), then the expander (6) is further provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat regenerator (11), the expander (6) is further provided with a circulating working medium channel which is communicated with the compressor (5) through the high-temperature heat exchanger (3), and then the compressor (5) is further provided with a circulating working medium channel which is communicated with the compressor through the high-temperature heat regenerator (11); the condenser (4) is provided with a condensate pipeline which is communicated with the high-temperature heat exchanger (3) through the booster pump (2), then the high-temperature heat exchanger (3) is communicated with the steam turbine (1) through a steam channel, and the steam turbine (1) is also communicated with the condenser (4) through a low-pressure steam channel; the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, and the expander (6) is connected with the compressor (5) and transmits power to form a dual-fuel combined cycle power device.
13. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices in claims 1-12, a high-temperature heat exchanger (3) is provided with a steam channel to be communicated with a steam turbine (1), and the high-temperature heat exchanger (3) is provided with a steam channel to be communicated with the steam turbine (1) through an air heating furnace (7), so that the dual-fuel combined cycle power device is formed.
14. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices of claims 1 to 12, a high-temperature heat exchanger (3) is provided with a steam channel to be communicated with a steam turbine (1) and is adjusted to be communicated with the steam turbine (1) after the high-temperature heat exchanger (3) is provided with the steam channel to be communicated with the steam turbine (1), and then the steam turbine (1) is provided with the steam channel to be communicated with the dual-fuel combined cycle power device through an air heating furnace (7) to form the dual-fuel combined cycle power device.
15. A dual-fuel combined cycle power device is characterized in that a second booster pump and a low-temperature heat regenerator are added in any one of the dual-fuel combined cycle power devices of claims 1 to 14, a condenser (4) is provided with a condensate liquid pipeline which is communicated with the booster pump (2) and adjusted to be that the condenser (4) is provided with a condensate liquid pipeline which is communicated with the low-temperature heat regenerator (13) through a second booster pump (12), a steam turbine (1) is provided with a steam extraction channel which is communicated with the low-temperature heat regenerator (13), and the low-temperature heat regenerator (13) is further provided with a condensate liquid pipeline which is communicated with the booster pump (2), so that the dual-fuel combined cycle power device is formed.
16. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices in claims 1-14, an expansion acceleration turbine (14) is added to replace the turbine (1), and a diffuser pipe (15) is added to replace a booster pump (2), so that the dual-fuel combined cycle power device is formed.
17. A dual-fuel combined cycle power device is characterized in that an expansion speed increaser (16) is added to replace an expansion machine (6), and a dual-energy compressor (17) is added to replace a compressor (5) in any one of the dual-fuel combined cycle power devices disclosed by claims 1-16 to form the dual-fuel combined cycle power device.
18. A dual-fuel combined cycle power device is characterized in that in any one of the dual-fuel combined cycle power devices of claims 1 to 17, a second heat source heat regenerator is omitted, an external air channel is communicated with an air heating furnace (7) through a heat source heat regenerator (9), and the external air channel is communicated with a boiler (8) through a second heat source heat regenerator (10) and the air 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 air heating furnace (7), and the second path is communicated with the boiler (8) through the air heating furnace (7); and a fuel gas channel of the boiler (8) is communicated with the outside through a second heat source heat regenerator (10) and is adjusted to be communicated with the outside through a heat source heat regenerator (9) of the boiler (8), so that the dual-fuel combined cycle power device is formed.
CN202210063870.8A 2021-01-17 2022-01-15 Dual-fuel combined cycle power plant Pending CN115217555A (en)

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CN202110115931 2021-01-17
CN2021101159316 2021-01-17

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