CN115263470A - Dual-fuel gas-steam combined cycle power device - Google Patents
Dual-fuel gas-steam combined cycle power device Download PDFInfo
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- CN115263470A CN115263470A CN202210057753.0A CN202210057753A CN115263470A CN 115263470 A CN115263470 A CN 115263470A CN 202210057753 A CN202210057753 A CN 202210057753A CN 115263470 A CN115263470 A CN 115263470A
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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
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- 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
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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
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
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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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/14—Gas-turbine plants characterised by the use of combustion products as the working fluid characterised by the arrangement of the combustion chamber in the plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/228—Dividing fuel between various burners
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- 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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- Mechanical Engineering (AREA)
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a dual-fuel gas-steam combined cycle power device, belonging to the technical field of thermodynamics and thermodynamics. A low-grade fuel channel is arranged outside and communicated with the primary section combustion chamber, a high-grade fuel channel is arranged outside and communicated with the secondary section combustion chamber, an air channel is arranged outside and communicated with the primary section combustion chamber through a second compressor, a primary section gas channel of the primary section combustion chamber is communicated with the secondary section combustion chamber, and a gas channel of the secondary section combustion chamber is communicated with the outside through a gas turbine and a high-temperature heat exchanger; the condenser is communicated with the high-temperature heat exchanger through the booster pump and the evaporator, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine, and the steam turbine is provided with a low-pressure steam channel which is communicated with the compressor and the condenser respectively after passing through the evaporator; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
Description
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 device are important means for providing power or electricity to human beings.
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 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.
In a conventional gas-steam power device, the adopted fuels such as gasoline, diesel oil, natural gas and the like are high-quality high-grade fuels; due to the limitation of the working principle or material properties or equipment manufacturing level and the like, in the combustion process of forming a high-temperature heat source by high-quality and high-grade fuel, the difference between the temperature of a combustion-supporting medium (such as air) and the constant-pressure combustion temperature of the fuel is large, and 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 gas-steam 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 gas-steam combined cycle power device, and the specific invention contents are explained in detail as follows:
1. the double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber and a secondary section combustion chamber; the external part of the combustor is provided with a low-grade fuel channel communicated with the primary section combustor, the external part of the combustor is also provided with a high-grade fuel channel communicated with the secondary section combustor, the external part of the combustor is also provided with an air channel communicated with the primary section combustor through a second compressor, the primary section combustor is also provided with a primary section fuel gas channel communicated with the secondary section combustor, and the secondary section combustor is also provided with a fuel gas channel communicated with the external part through a gas turbine and a high-temperature heat exchanger; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with the high-temperature heat exchanger, a steam channel of the compressor is communicated with the high-temperature heat exchanger, a steam channel of the high-temperature heat exchanger is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
2. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part of the primary combustion chamber is provided with a low-grade fuel channel communicated with the primary combustion chamber, the external part of the primary combustion chamber is also provided with a high-grade fuel channel communicated with the secondary combustion chamber, the external part of the primary combustion chamber is also provided with an air channel communicated with the primary combustion chamber through a second compressor and a high-temperature regenerator, the primary combustion chamber is also provided with a primary fuel gas channel communicated with the secondary combustion chamber, and the secondary combustion chamber is also provided with a fuel gas channel communicated with the external part through a gas turbine, the high-temperature regenerator and a high-temperature heat exchanger; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with the high-temperature heat exchanger, a steam channel of the compressor is communicated with the high-temperature heat exchanger, a steam channel of the high-temperature heat exchanger is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
3. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part of the first-stage combustor is provided with a low-grade fuel channel communicated with the first-stage combustor, the external part of the first-stage combustor is also provided with a high-grade fuel channel communicated with the second-stage combustor, the external part of the first-stage combustor is also provided with an air channel communicated with the first-stage combustor through a second compressor, the first-stage combustor is also provided with a first-stage fuel gas channel communicated with the second-stage combustor through a high-temperature heat regenerator, and the second-stage combustor is also provided with a fuel gas channel communicated with the external part through a gas turbine, the high-temperature heat regenerator and a high-temperature heat exchanger; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with the high-temperature heat exchanger, a steam channel of the compressor is communicated with the high-temperature heat exchanger, a steam channel of the high-temperature heat exchanger is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
4. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel communicated with the primary section combustion chamber, the external part is also provided with a high-grade fuel channel communicated with the secondary section combustion chamber, the external part is also provided with an air channel communicated with the primary section combustion chamber through a second compressor and a high-temperature heat regenerator, the primary section combustion chamber is also provided with a primary section gas channel communicated with the secondary section combustion chamber, the secondary section combustion chamber is also provided with a gas channel communicated with the gas turbine, then the gas turbine is provided with a gas channel communicated with the gas turbine through the high-temperature heat regenerator, and the gas turbine is also provided with a gas channel communicated with the external part through a high-temperature heat exchanger; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with the high-temperature heat exchanger, a steam channel of the compressor is communicated with the high-temperature heat exchanger, a steam channel of the high-temperature heat exchanger is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
5. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part of the gas turbine is provided with a low-grade fuel channel communicated with the primary section combustion chamber, the external part of the gas turbine is also provided with a high-grade fuel channel communicated with the secondary section combustion chamber, the external part of the gas turbine is also provided with an air channel communicated with the primary section combustion chamber through a second compressor, the primary section combustion chamber is also provided with a primary section gas channel communicated with the secondary section combustion chamber through a high-temperature regenerator, the secondary section combustion chamber is also provided with a gas channel communicated with the gas turbine, then the gas turbine is provided with a gas channel communicated with the gas turbine through the high-temperature regenerator, and the gas turbine is also provided with a gas channel communicated with the external part through a high-temperature heat exchanger; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with the high-temperature heat exchanger, a steam channel of the compressor is communicated with the high-temperature heat exchanger, a steam channel of the high-temperature heat exchanger is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
6. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel communicated with the primary section combustion chamber, the external part is also provided with a high-grade fuel channel communicated with the secondary section combustion chamber, the external part is also provided with an air channel communicated with the secondary compressor, then the secondary compressor is further provided with an air channel communicated with the primary section combustion chamber through a high-temperature heat regenerator, the primary section combustion chamber is further provided with a primary section gas channel communicated with the secondary section combustion chamber, and the secondary section combustion chamber is further provided with a gas channel communicated with the external part through a gas turbine, the high-temperature heat regenerator and the high-temperature heat exchanger; the condenser is provided with a condensate pipeline, a booster pump is communicated with the evaporator, then a steam channel of the evaporator is communicated with the high-temperature heat exchanger, a steam channel of the compressor is communicated with the high-temperature heat exchanger, a steam channel of the high-temperature heat exchanger is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then divided into two paths, namely a first path is communicated with the compressor and a second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
7. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices in items 1-6, a gas channel is additionally arranged on an evaporator and is communicated with the outside to form the dual-fuel gas-steam combined cycle power device.
8. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices in items 1-6, a heat supply device is added, a low-pressure steam channel of a steam turbine is communicated with an evaporator and then divided into two paths, wherein the first path is communicated with a compressor, the second path is communicated with a condenser, the low-pressure steam channel of the steam turbine is communicated with the heat supply device and then divided into two paths, the first path is communicated with the compressor, the second path is communicated with the condenser, the evaporator is additionally provided with a gas channel communicated with the outside, and a heated medium channel of the heat supply device is communicated with the outside, so that the dual-fuel gas-steam combined cycle power device is formed.
9. A dual-fuel gas-steam combined cycle power device is characterized in that a middle-temperature heat regenerator is added in any one of the dual-fuel gas-steam combined cycle power devices in items 1 to 7, a steam channel of an evaporator is communicated with a high-temperature heat exchanger and is adjusted to be communicated with the high-temperature heat exchanger through the middle-temperature heat regenerator, a steam channel of a compressor is communicated with the high-temperature heat exchanger and is adjusted to be communicated with the high-temperature heat exchanger through the middle-temperature heat regenerator, a low-pressure steam channel of a steam turbine is communicated with the evaporator through the middle-temperature heat regenerator, and the low-pressure steam channel of the steam turbine is communicated with the evaporator through the middle-temperature heat regenerator, so that the dual-fuel gas-steam combined cycle power device is formed.
10. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices in items 1-7, a medium temperature heat regenerator is added, a steam channel of an evaporator is communicated with a high temperature heat exchanger and is adjusted to be communicated with the high temperature heat exchanger through the medium temperature heat regenerator, a steam channel of a compressor is communicated with the high temperature heat exchanger and is adjusted to be communicated with the high temperature heat exchanger through the medium temperature heat regenerator, a steam channel of the high temperature heat exchanger is communicated with a steam turbine, a low pressure steam channel of the steam turbine is communicated with the evaporator and is adjusted to be communicated with the high temperature heat exchanger through the medium temperature heat regenerator, the steam turbine is also communicated with the steam turbine through the medium temperature heat regenerator, and the steam turbine is further communicated with the evaporator through the low pressure steam channel, so that the dual-fuel gas-steam combined cycle power device is formed.
11. A dual-fuel gas-steam 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 gas-steam combined cycle power devices 1-10, a condenser is adjusted to be communicated with a booster pump through a condensate pipeline, the condenser is adjusted to be communicated with the low-temperature heat regenerator through the second booster pump through the condensate pipeline, a compressor is provided with a steam extraction channel to be communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the booster pump through the condensate pipeline, so that the dual-fuel gas-steam combined cycle power device is formed.
12. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices 1-11, a high heat exchanger is adjusted to be communicated with a steam turbine through a steam channel, and the high heat exchanger is adjusted to be communicated with the steam turbine through a primary combustion chamber, so that the dual-fuel gas-steam combined cycle power device is formed.
13. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices 1-12, an expansion speed increaser is added to replace a steam turbine, a dual-energy compressor is added to replace a compressor, a diffuser pipe is added to replace a booster pump, and the dual-fuel gas-steam combined cycle power device is formed.
Description of the drawings:
FIG. 1 is a schematic thermodynamic system diagram of a dual fuel gas-steam combined cycle power plant 1 provided in accordance with the present invention.
FIG. 2 is a schematic thermodynamic system diagram of a dual fuel gas-steam 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 gas-steam 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 gas-steam 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 gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 6 is a diagram of a 6 th principle thermodynamic system of a dual fuel gas-steam 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 gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 8 is a diagram of a 8 th principle thermodynamic system of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 9 is a diagram of a 9 th principal thermodynamic system of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 10 is a 10 th principal thermodynamic system diagram of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 11 is a 11 th principal thermodynamic system diagram of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 12 is a schematic thermodynamic system diagram of a 12 th principle of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 13 is a 13 th principal thermodynamic system diagram of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
In the figure, 1-steam turbine, 2-compressor, 3-booster pump, 4-condenser, 5-evaporator (waste heat boiler), 6-high temperature heat exchanger, 7-second compressor, 8-gas turbine, 9-primary combustion chamber, 10-secondary combustion chamber, 11-high temperature regenerator, 12-heater, 13-medium temperature regenerator, 14-second booster pump, 15-low temperature regenerator, 16-expansion speed increaser, 17-dual-energy compressor and 18-diffuser pipe.
Regarding the expansion speed increaser, the primary combustion chamber, the low-grade fuel, the high-grade fuel and the primary fuel gas, the following brief descriptions are given here:
(1) In order to reveal the differences in the operational sequences of the steam turbine 1 and the expansion gear 16, the following explanations are made:
(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 3 can be provided by the steam turbine 1 through mechanical transmission or from the outside.
(2) In contrast, in fig. 13, the steam at the outlet of the expansion speed increaser 16 also has a very low pressure, but the flow rate is relatively large (a part of the pressure drop is converted into the kinetic energy of the low-pressure steam) to meet the requirement of reducing the speed and increasing the pressure of the diffuser pipe 13.
(3) The process of realizing thermal variable work by steam flowing through the steam turbine 1 in fig. 1 adopts 'pressure reduction work', and the process of realizing thermal variable work by steam flowing through the expansion speed increaser 16 in fig. 13 adopts 'pressure reduction work and speed increase'.
(2) Description on the primary combustion chamber and the primary gas:
(1) according to the requirement, a related heat exchanger (heat exchange tube bundle) is arranged in the primary combustion chamber; for example, in fig. 12, there are illustrated a superheater that heats steam from the high-temperature heat exchanger 6, a reheater that heats steam from the steam turbine 1, and the like.
(2) The specific heat exchange tube bundle (superheater or reheater) is not specifically designated, but is collectively expressed as a primary stage combustor.
(3) In the application of the invention, the primary section combustor 9 provides a heat source primary section to construct heat load and undertakes the heating task of air entering the secondary section combustor 10; and sometimes, heating the circulating steam of the bottom single-working medium combined cycle subsystem.
(4) Initial stage gas: the gas supplied to the secondary combustion chamber 10 from the primary combustion chamber 9 contains air required for combustion of high-grade fuel in the secondary combustion chamber 10, i.e. the primary gas is rich in air components.
(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 (e.g., adiabatic firing temperature or fixed pressure firing temperature) at which combustion products can form. 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.
The specific implementation mode is as follows:
it is to be noted that, in the description of the structure and the flow, the repetition is not necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.
The dual fuel gas-steam combined cycle power plant shown in fig. 1 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary combustion chamber and a secondary combustion chamber; a low-grade fuel channel is arranged outside and communicated with the primary combustion chamber 9, a high-grade fuel channel is also arranged outside and communicated with the secondary combustion chamber 10, an air channel is also arranged outside and communicated with the primary combustion chamber 9 through a second compressor 7, a primary fuel gas channel is also arranged outside and communicated with the secondary combustion chamber 10, and a fuel gas channel is also arranged outside and communicated with the secondary combustion chamber 10 through a gas turbine 8 and a high-temperature heat exchanger 6; the condenser 4 is provided with a condensate pipeline, the evaporator 5 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6 after the condensate pipeline is communicated with the evaporator 5 through the booster pump 3, the compressor 2 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel to be communicated with the steam turbine 1, the steam turbine 1 is also provided with a low-pressure steam channel to be communicated with the evaporator 5 and then divided into two paths, namely, the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) In the flow, external air flows through the second compressor 7, is subjected to pressure rise and temperature rise and then enters the primary combustion chamber 9, external low-grade fuel enters the primary combustion chamber 9, the low-grade fuel and the air are mixed and combusted in the primary combustion chamber 9 to form primary fuel gas which is high in temperature and rich in air, and then the primary fuel gas is supplied to the secondary combustion chamber 10; the external high-grade fuel enters a second-stage combustion chamber 10, is mixed with the primary section fuel gas from the primary section combustion chamber 9 and is combusted into high-temperature high-pressure fuel gas, and the high-temperature high-pressure fuel gas generated by the second-stage combustion chamber 10 flows through a gas turbine 8 to reduce pressure and work and flows through a high-temperature heat exchanger 6 to release heat and reduce temperature and then is discharged outwards; the condensate of the condenser 4 is boosted by the booster pump 3, passes through the evaporator 5 to absorb heat, raise temperature, vaporize and overheat, then enters the high-temperature heat exchanger 6 to absorb heat and raise temperature, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 6 to absorb heat and raise temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the steam turbine 1 to reduce pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 5 to release heat and reduce temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 2 to increase pressure and temperature, and the second path enters the condenser 4 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the primary section combustion chamber 9 and the secondary section combustion chamber 10, the cooling medium takes away the low-temperature heat load through the condenser 4, and the air and the fuel gas take away the low-temperature heat load through the inlet and outlet flow; the work output by the steam turbine 1 and the gas turbine 8 is provided for the compressor 2, the second compressor 7 and the external actuating power, or the work output by the steam turbine 1 and the gas turbine 8 is provided for the compressor 2, the booster pump 3, the second compressor 7 and the external actuating power, so that a dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 2 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary combustion chamber, a secondary combustion chamber and a high-temperature heat regenerator; a low-grade fuel channel is arranged outside and communicated with the primary section combustion chamber 9, a high-grade fuel channel is also arranged outside and communicated with the secondary section combustion chamber 10, an air channel is also arranged outside and communicated with the primary section combustion chamber 9 through a second compressor 7 and a high-temperature heat regenerator 11, the primary section combustion chamber 9 is also provided with a primary section gas channel and communicated with the secondary section combustion chamber 10, and the secondary section combustion chamber 10 is also provided with a gas channel and communicated with the outside through a gas turbine 8, a high-temperature heat regenerator 11 and a high-temperature heat exchanger 6; the condenser 4 has a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then a steam channel of the evaporator 5 is communicated with the high-temperature heat exchanger 6, a steam channel of the compressor 2 is communicated with the high-temperature heat exchanger 6, a steam channel of the high-temperature heat exchanger 6 is communicated with the steam turbine 1, and the steam turbine 1 is divided into two paths after a low-pressure steam channel is communicated with the evaporator 5, wherein the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: external air enters the primary combustion chamber 9 after being subjected to pressure rise and temperature rise by the second compressor 7 and heat absorption and temperature rise by the high-temperature heat regenerator 11, external low-grade fuel enters the primary combustion chamber 9, and the low-grade fuel and the air are mixed and combusted in the primary combustion chamber 9 to form primary fuel gas which is high in temperature and rich in air, and then the primary fuel gas is supplied to the secondary combustion chamber 10; the external high-grade fuel enters a second-stage combustion chamber 10, is mixed with the primary-stage fuel gas from the primary-stage combustion chamber 9 and is combusted into high-temperature high-pressure fuel gas, the high-temperature high-pressure fuel gas generated by the second-stage combustion chamber 10 flows through a gas turbine 8 to reduce the pressure and do work, and the fuel gas discharged by the gas turbine 8 flows through a high-temperature heat regenerator 11 and a high-temperature heat exchanger 6 to gradually release heat and reduce the temperature and then is discharged to the outside, so that the dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 3 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary combustion chamber, a secondary combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with a primary section combustion chamber 9, the external part is also provided with a high-grade fuel channel which is communicated with a secondary section combustion chamber 10, the external part is also provided with an air channel which is communicated with the primary section combustion chamber 9 through a second compressor 7, the primary section combustion chamber 9 is also provided with a primary section fuel gas channel which is communicated with the secondary section combustion chamber 10 through a high-temperature heat regenerator 11, and the secondary section combustion chamber 10 is also provided with a fuel gas channel which is communicated with the external part through a gas turbine 8, the high-temperature heat regenerator 11 and the high-temperature heat exchanger 6; the condenser 4 has a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then a steam channel of the evaporator 5 is communicated with the high-temperature heat exchanger 6, a steam channel of the compressor 2 is communicated with the high-temperature heat exchanger 6, a steam channel of the high-temperature heat exchanger 6 is communicated with the steam turbine 1, and the steam turbine 1 is divided into two paths after a low-pressure steam channel is communicated with the evaporator 5, wherein the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: external air enters the primary combustion chamber 9 after being boosted and heated by the second compressor 7, external low-grade fuel enters the primary combustion chamber 9, the low-grade fuel and the air are mixed and combusted in the primary combustion chamber 9 to form primary fuel gas which is high in temperature and rich in air, and the primary fuel gas is supplied to the secondary combustion chamber 10 after being heated by the high-temperature heat regenerator 11; the external high-grade fuel enters the second-stage combustion chamber 10, is mixed with the primary-stage fuel gas from the primary-stage combustion chamber 9 and is combusted into high-temperature high-pressure fuel gas, the high-temperature high-pressure fuel gas generated by the second-stage combustion chamber 10 flows through the gas turbine 8 to reduce the pressure and do work, flows through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 6 to gradually release heat and reduce the temperature, and is discharged outwards to form the dual-fuel gas-steam combined cycle power device.
The dual fuel gas-steam combined cycle power plant shown in fig. 4 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary combustion chamber, a secondary combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with a primary section combustion chamber 9, the external part is also provided with a high-grade fuel channel which is communicated with a secondary section combustion chamber 10, the external part is also provided with an air channel which is communicated with the primary section combustion chamber 9 through a second compressor 7 and a high-temperature heat regenerator 11, the primary section combustion chamber 9 is also provided with a primary section gas channel which is communicated with the secondary section combustion chamber 10, the secondary section combustion chamber 10 is also provided with a gas channel which is communicated with a gas turbine 8, then the gas turbine 8 is also provided with a gas channel which is communicated with the self through the high-temperature heat regenerator 11, and the gas turbine 8 is also provided with a gas channel which is communicated with the external part through a high-temperature heat exchanger 6; the condenser 4 is provided with a condensate pipeline, the evaporator 5 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6 after the condensate pipeline is communicated with the evaporator 5 through the booster pump 3, the compressor 2 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel to be communicated with the steam turbine 1, the steam turbine 1 is also provided with a low-pressure steam channel to be communicated with the evaporator 5 and then divided into two paths, namely, the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the external air flows through the second compressor 7 to be boosted and heated, flows through the high-temperature heat regenerator 11 to absorb heat and be heated, and then enters the primary combustion chamber 9; the external low-grade fuel enters the primary combustion chamber 9, the low-grade fuel and the air are mixed and combusted in the primary combustion chamber 9 to form primary fuel gas which is high in temperature and rich in air, and then the primary fuel gas is supplied to the secondary combustion chamber 10; the external high-grade fuel enters a secondary combustion chamber 10, is mixed with the primary section gas from the primary section combustion chamber 9 and is combusted into high-temperature high-pressure gas, the high-temperature high-pressure gas generated by the secondary combustion chamber 10 enters a gas turbine 8 to perform pressure reduction work to a certain degree, then flows through a high-temperature heat regenerator 11 to release heat and reduce temperature, and then enters the gas turbine 8 to continue to perform pressure reduction work; and the gas discharged by the gas turbine 8 is discharged to the outside after passing through the high-temperature heat exchanger 6 to release heat and reduce temperature, so that a dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 5 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary combustion chamber, a secondary combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with a primary combustion chamber 9, the external part is also provided with a high-grade fuel channel which is communicated with a secondary combustion chamber 10, the external part is also provided with an air channel which is communicated with the primary combustion chamber 9 through a second compressor 7, the primary combustion chamber 9 is also provided with a primary gas channel which is communicated with the secondary combustion chamber 10 through a high-temperature heat regenerator 11, the secondary combustion chamber 10 is also provided with a gas channel which is communicated with a gas turbine 8, then the gas turbine 8 is also provided with a gas channel which is communicated with the self through the high-temperature heat regenerator 11, and the gas turbine 8 is also provided with a gas channel which is communicated with the external part through a high-temperature heat exchanger 6; the condenser 4 is provided with a condensate pipeline, the evaporator 5 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6 after the condensate pipeline is communicated with the evaporator 5 through the booster pump 3, the compressor 2 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel to be communicated with the steam turbine 1, the steam turbine 1 is also provided with a low-pressure steam channel to be communicated with the evaporator 5 and then divided into two paths, namely, the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: external air flows through the second compressor 7, is boosted and heated, then enters the primary combustion chamber 9, external low-grade fuel enters the primary combustion chamber 9, the low-grade fuel and the air are mixed and combusted in the primary combustion chamber 9 to be primary fuel gas which is high in temperature and rich in air, and the primary fuel gas flows through the high-temperature heat regenerator 11 to absorb heat and be heated and then is supplied to the secondary combustion chamber 10; the external high-grade fuel enters a secondary combustion chamber 10, is mixed with the primary section gas from the primary section combustion chamber 9 and is combusted into high-temperature high-pressure gas, the high-temperature high-pressure gas generated by the secondary combustion chamber 10 enters a gas turbine 8 to perform pressure reduction work to a certain degree, then flows through a high-temperature heat regenerator 11 to release heat and reduce temperature, and then enters the gas turbine 8 to continue to perform pressure reduction work; and the gas discharged by the gas turbine 8 is discharged to the outside after passing through the high-temperature heat exchanger 6 to release heat and reduce temperature, so that a dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 6 is implemented as follows:
(1) Structurally, the system mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary combustion chamber, a secondary combustion chamber and a high-temperature heat regenerator; a low-grade fuel channel is arranged outside and communicated with the primary combustion chamber 9, a high-grade fuel channel is also arranged outside and communicated with the secondary combustion chamber 10, an air channel is also arranged outside and communicated with the second compressor 7, then the second compressor 7 is communicated with the second compressor 7 through a high-temperature heat regenerator 11, the air channel of the second compressor 7 is also communicated with the primary combustion chamber 9, a primary combustion gas channel of the primary combustion chamber 9 is also communicated with the secondary combustion chamber 10, and a combustion gas channel of the secondary combustion chamber 10 is also communicated with the outside through a gas turbine 8, the high-temperature heat regenerator 11 and the high-temperature heat exchanger 6; the condenser 4 has a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then a steam channel of the evaporator 5 is communicated with the high-temperature heat exchanger 6, a steam channel of the compressor 2 is communicated with the high-temperature heat exchanger 6, a steam channel of the high-temperature heat exchanger 6 is communicated with the steam turbine 1, and the steam turbine 1 is divided into two paths after a low-pressure steam channel is communicated with the evaporator 5, wherein the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4; the condenser 4 is also communicated with the outside through a cooling medium channel, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the external air enters the second compressor 7 to be boosted and heated to a certain degree, then flows through the high-temperature heat regenerator 11 to absorb heat and be heated, and then enters the second compressor 7 to be boosted and heated continuously; air discharged by the second compressor 7 enters the primary section combustor 9, external low-grade fuel enters the primary section combustor 9, and the low-grade fuel and the air are mixed and combusted in the primary section combustor 9 to form primary section fuel gas which is high in temperature and rich in air, and then the primary section fuel gas is supplied to the secondary section combustor 10; the external high-grade fuel enters a secondary combustion chamber 10, is mixed with the primary section gas from the primary section combustion chamber 9 and is combusted into high-temperature high-pressure gas, and the high-temperature high-pressure gas generated by the secondary combustion chamber 10 enters a gas turbine 8 to reduce the pressure and do work; the gas discharged by the gas turbine 8 flows through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 6 to gradually release heat and reduce temperature, and then is discharged outwards to form the dual-fuel gas-steam combined cycle power device.
The dual fuel gas-steam combined cycle power plant shown in fig. 7 is implemented as follows:
in the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the evaporator 5 is additionally provided with a gas passage to communicate with the outside; the condensate of the condenser 4 flows through the booster pump 3, is boosted, then enters the evaporator 5, simultaneously absorbs the heat in the low-pressure steam from the steam turbine 1 and the fuel gas discharged from the high-temperature heat exchanger 6, is heated, evaporated and superheated, and then is supplied to the high-temperature heat exchanger 6, so that the dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 8 is implemented as follows:
(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in fig. 1, a heat supply device is added, a low-pressure steam channel of a steam turbine 1 is communicated with an evaporator 5 and then divided into two paths, wherein the first path is communicated with a compressor 2, the second path is communicated with a condenser 4, the low-pressure steam channel of the steam turbine 1 is communicated with a heat supply device 12 and then divided into two paths, the first path is communicated with the compressor 2 and the second path is communicated with the condenser 4, the evaporator 5 is additionally provided with a gas channel which is communicated with the outside, and the heat supply device 12 is also provided with a heated medium channel which is communicated with the outside.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the condensate of the condenser 4 is boosted by the booster pump 3, and then is absorbed, heated, vaporized and overheated by the evaporator 5, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the steam turbine 1 to reduce pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the heat supply device 12 to release heat and reduce temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 2 to increase pressure and temperature, and the second path enters the condenser 4 to release heat and condense; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the primary combustion chamber 9 and the secondary combustion chamber 10, the low-temperature heat load is taken away by a cooling medium through the condenser 4, the low-temperature heat load is taken away by air and fuel gas through an inlet-outlet flow, and the medium-temperature heat load is taken away by a heated medium through the heater 12; the work output by the steam turbine 1 and the gas turbine 8 is provided for the compressor 2, the second compressor 7 and the external actuating power, or the work output by the steam turbine 1 and the gas turbine 8 is provided for the compressor 2, the booster pump 3, the second compressor 7 and the external actuating power, so that a dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 9 is implemented as follows:
(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in fig. 1, a medium temperature heat regenerator is added, a steam channel of an evaporator 5 is communicated with a high temperature heat exchanger 6 and adjusted to be that the evaporator 5 has the steam channel communicated with the high temperature heat exchanger 6 through the medium temperature heat regenerator 13, a steam channel of a compressor 2 is communicated with the high temperature heat exchanger 6 and adjusted to be that the compressor 2 has the steam channel communicated with the high temperature heat exchanger 6 through the medium temperature heat regenerator 13, and a low pressure steam channel of a steam turbine 1 is communicated with the evaporator 5 and adjusted to be that the steam turbine 1 has the low pressure steam channel communicated with the evaporator 5 through the medium temperature heat regenerator 13.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the condensate of the condenser 4 flows through the booster pump 3 to be boosted, flows through the evaporator 5 to absorb heat, is heated and vaporized, flows through the medium-temperature heat regenerator 13 to continuously absorb heat, and then enters the high-temperature heat exchanger 6 to absorb heat and be heated; the steam discharged by the compressor 2 flows through the medium-temperature heat regenerator 13 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the steam turbine 1 to reduce pressure and work, the low-pressure steam discharged by the steam turbine 1 flows through the medium-temperature heat regenerator 13 and the evaporator 5 to gradually release heat and reduce temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 2 to increase pressure and temperature, and the second path enters the condenser 4 to release heat and condense, so that the dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 10 is implemented as follows:
(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in fig. 1, a middle temperature heat regenerator is added, a steam channel of the evaporator 5 is communicated with the high temperature heat exchanger 6 and adjusted to be that the evaporator 5 has the steam channel communicated with the high temperature heat exchanger 6 through the middle temperature heat regenerator 13, a steam channel of the compressor 2 is communicated with the high temperature heat exchanger 6 and adjusted to be that the compressor 2 has the steam channel communicated with the high temperature heat exchanger 6 through the middle temperature heat regenerator 13, a steam channel of the high temperature heat exchanger 6 is communicated with the steam turbine 1 and a low pressure steam channel of the steam turbine 1 is communicated with the evaporator 5 and adjusted to be that the high temperature heat exchanger 6 has the steam channel communicated with the steam turbine 1, the steam turbine 1 also has the steam channel communicated with the steam turbine 1 through the middle temperature heat regenerator 13 and the steam turbine 1 further has the low pressure steam channel communicated with the evaporator 5.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the condensate of the condenser 4 is boosted by the booster pump 3, absorbed by the evaporator 5, heated and vaporized, absorbed by the medium-temperature heat regenerator 13 and heated continuously, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the compressor 2 flows through the medium-temperature heat regenerator 13 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 enters the steam turbine 1 to reduce pressure and do work to a certain degree, then flows through the medium-temperature heat regenerator 13 to release heat and reduce temperature, and then enters the steam turbine 1 to continue reducing pressure and do work; the low-pressure steam discharged by the steam turbine 1 passes through the evaporator 5 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 2 to increase the pressure and the temperature, and the second path enters the condenser 4 to release heat and condense, so that the dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 11 is implemented as follows:
(1) Structurally, in the dual-fuel gas-steam combined cycle power device shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, a condensate pipeline of the condenser 4 is communicated with the booster pump 3, the condenser 4 is adjusted to be communicated with the low-temperature heat regenerator 15 through a condensate pipeline of the second booster pump 14, a steam extraction channel of the compressor 2 is communicated with the low-temperature heat regenerator 15, and the low-temperature heat regenerator 15 is communicated with the booster pump 3 through the condensate pipeline.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the condensate discharged by the condenser 4 flows through the second booster pump 14 to be boosted and then enters the low-temperature heat regenerator 15 to be mixed with the extracted steam from the compressor 2, absorb heat and raise the temperature, and the extracted steam releases heat to form condensate; the condensate of the low-temperature heat regenerator 15 is boosted by the booster pump 3, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature after the heat absorption, vaporization and overheating of the evaporator 5, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the steam turbine 1 to reduce pressure and do work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 5 to release heat and reduce temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 2 to increase pressure and temperature, and the second path enters the condenser 4 to release heat and condense; the low-pressure steam entering the compressor 2 is subjected to pressure boosting and temperature rising to a certain degree and then divided into two paths, wherein the first path is provided for the low-temperature heat regenerator 15, and the second path is subjected to pressure boosting and temperature rising continuously and provided for the high-temperature heat exchanger 6, so that the dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 12 is implemented as follows:
(1) Structurally, in the dual fuel gas-steam combined cycle power plant shown in fig. 1, the high heat exchanger 6 having the steam passage communicating with the steam turbine 1 is adjusted such that the high heat exchanger 6 having the steam passage communicating with the steam turbine 1 via the primary combustion chamber 9.
(2) In the process, external air flows through the second compressor 7, is subjected to pressure rise and temperature rise and then enters the primary combustion chamber 9, external low-grade fuel enters the primary combustion chamber 9, the low-grade fuel and the air are mixed and combusted in the primary combustion chamber 9 to form primary fuel gas which is high in temperature and rich in air, and the primary fuel gas releases heat and is provided for the secondary combustion chamber 10 after circulating steam flowing through the primary fuel gas; the external high-grade fuel enters a second-stage combustion chamber 10, is mixed with the primary section fuel gas from the primary section combustion chamber 9 and is combusted into high-temperature high-pressure fuel gas, and the high-temperature high-pressure fuel gas generated by the second-stage combustion chamber 10 flows through a gas turbine 8 to reduce pressure and work and flows through a high-temperature heat exchanger 6 to release heat and reduce temperature and then is discharged outwards; the condensate of the condenser 4 is boosted by the booster pump 3, and then is absorbed, heated, vaporized and overheated by the evaporator 5, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; steam discharged by the high-temperature heat exchanger 6 enters the steam turbine 1 for pressure reduction and work doing after absorbing heat and raising temperature through the primary section combustion chamber 9, low-pressure steam discharged by the steam turbine 1 releases heat and lowers temperature through the evaporator 5, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 2 for pressure increase and temperature rise, and the second path enters the condenser 4 for heat release and condensation; the low-grade fuel and the high-grade fuel jointly provide driving heat load through the primary section combustion chamber 9 and the secondary section combustion chamber 10, the cooling medium takes away the low-temperature heat load through the condenser 4, and the air and the fuel gas take away the low-temperature heat load through the inlet and outlet flow; the work output by the steam turbine 1 and the gas turbine 8 is provided for the compressor 2, the second compressor 7 and the external actuating power, or the work output by the steam turbine 1 and the gas turbine 8 is provided for the compressor 2, the booster pump 3, the second compressor 7 and the external actuating power, so that a dual-fuel gas-steam combined cycle power device is formed.
The dual fuel gas-steam combined cycle power plant shown in fig. 13 is implemented as follows:
(1) Structurally, in the dual-fuel gas-steam combined cycle power plant shown in fig. 1, an expansion speed increaser 16 is added to replace the steam turbine 1, a dual-energy compressor 17 is added to replace the compressor 2, and a diffuser 18 is added to replace the booster pump 3.
(2) Compared with the dual-fuel gas-steam combined cycle power plant shown in fig. 1, the difference in the flow is that: the condensate of the condenser 4 flows through the diffuser pipe 18 to reduce the speed and increase the pressure, flows through the evaporator 5 to absorb heat, raise the temperature, vaporize and overheat, then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature, and the steam discharged by the dual-energy compressor 17 enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expansion speed increaser 16 to reduce the pressure, do work and increase the speed, the low-pressure steam discharged by the expansion speed increaser 16 flows through the evaporator 5 to release heat and reduce the temperature, and then is divided into two paths, wherein the first path enters the dual-energy compressor 17 to increase the pressure, raise the temperature and reduce the speed, and the second path enters the condenser 4 to release heat and condense; the work output by the gas turbine 8 and the expansion speed increaser 16 is provided to the second compressor 7, the dual-energy compressor 17 and the external power to form a dual-fuel gas-steam combined cycle power plant.
The effect that the technology of the invention can realize-the dual-fuel gas-steam 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 conversion efficiency is effectively improved.
(3) The low-grade fuel completes the temperature increase of compressed air and provides for 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 gas-steam combined cycle power device, the low-grade fuel exerts the effect of the high-grade fuel, and the application 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 a circulating system of the top gas turbine, improving the flow of gas circulating 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) Simple structure, reasonable flow, rich scheme, and is favorable to lowering the manufacture cost of the device and expanding the application range of the technology.
Claims (13)
1. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber and a secondary section combustion chamber; a low-grade fuel channel is arranged outside and communicated with the primary section combustion chamber (9), a high-grade fuel channel is arranged outside and communicated with the secondary section combustion chamber (10), an air channel is arranged outside and communicated with the primary section combustion chamber (9) through a second compressor (7), a primary section gas channel is arranged in the primary section combustion chamber (9) and communicated with the secondary section combustion chamber (10), and a gas channel is arranged in the secondary section combustion chamber (10) and communicated with the outside through a gas turbine (8) and a high-temperature heat exchanger (6); the condenser (4) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (5) through the booster pump (3), then the evaporator (5) is further provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is further provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is further provided with a low-pressure steam channel to be communicated with the evaporator (5) and then divided into two paths, namely, the first path is communicated with the compressor (2) and the second path is communicated with the condenser (4); the condenser (4) is also provided with a cooling medium channel communicated with the outside, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power, so that a dual-fuel gas-steam combined cycle power device is formed.
2. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; a low-grade fuel channel is arranged outside and communicated with a primary section combustion chamber (9), a high-grade fuel channel is arranged outside and communicated with a secondary section combustion chamber (10), an air channel is arranged outside and communicated with the primary section combustion chamber (9) through a second compressor (7) and a high-temperature heat regenerator (11), the primary section combustion chamber (9) is also provided with a primary section gas channel communicated with the secondary section combustion chamber (10), and the secondary section combustion chamber (10) is also provided with a gas channel communicated with the outside through a gas turbine (8), the high-temperature heat regenerator (11) and a high-temperature heat exchanger (6); the condenser (4) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (5) through the booster pump (3), then the evaporator (5) is further provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is further provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is further provided with a low-pressure steam channel to be communicated with the evaporator (5) and then divided into two paths, namely, the first path is communicated with the compressor (2) and the second path is communicated with the condenser (4); the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
3. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; a low-grade fuel channel is arranged outside and communicated with the primary section combustion chamber (9), a high-grade fuel channel is arranged outside and communicated with the secondary section combustion chamber (10), an air channel is arranged outside and communicated with the primary section combustion chamber (9) through a second compressor (7), a primary section gas channel is also arranged in the primary section combustion chamber (9) and communicated with the secondary section combustion chamber (10) through a high-temperature heat regenerator (11), and a gas channel is also arranged in the secondary section combustion chamber (10) and communicated with the outside through a gas turbine (8), the high-temperature heat regenerator (11) and a high-temperature heat exchanger (6); the condenser (4) is provided with a condensate pipeline, a booster pump (3) is communicated with the evaporator (5), then a steam channel of the evaporator (5) is communicated with the high-temperature heat exchanger (6), a steam channel of the compressor (2) is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also communicated with the steam turbine (1), the steam turbine (1) is also divided into two paths after being communicated with the evaporator (5), wherein the first path is communicated with the compressor (2), and the second path is communicated with the condenser (4); the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
4. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; a low-grade fuel channel is arranged outside and communicated with a primary section combustion chamber (9), a high-grade fuel channel is arranged outside and communicated with a secondary section combustion chamber (10), an air channel is arranged outside and communicated with the primary section combustion chamber (9) through a second compressor (7) and a high-temperature heat regenerator (11), the primary section combustion chamber (9) is also provided with a primary section gas channel communicated with the secondary section combustion chamber (10), the secondary section combustion chamber (10) is also provided with a gas channel communicated with a gas turbine (8), then the gas turbine (8) is provided with a gas channel communicated with the gas turbine through the high-temperature heat regenerator (11), and the gas turbine (8) is also provided with a gas channel communicated with the outside through the high-temperature heat exchanger (6); the condenser (4) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (5) through the booster pump (3), then the evaporator (5) is further provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is further provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is further provided with a low-pressure steam channel to be communicated with the evaporator (5) and then divided into two paths, namely, the first path is communicated with the compressor (2) and the second path is communicated with the condenser (4); the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
5. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel which is communicated with a primary section combustion chamber (9), the external part is also provided with a high-grade fuel channel which is communicated with a secondary section combustion chamber (10), the external part is also provided with an air channel which is communicated with the primary section combustion chamber (9) through a second compressor (7), the primary section combustion chamber (9) is also provided with a primary section gas channel which is communicated with the secondary section combustion chamber (10) through a high-temperature heat regenerator (11), the secondary section combustion chamber (10) is also provided with a gas channel which is communicated with a gas turbine (8), then the gas turbine (8) is also provided with a gas channel which is communicated with the gas turbine through the high-temperature heat regenerator (11), and the gas turbine (8) is also provided with a gas channel which is communicated with the external part through a high-temperature heat exchanger (6); the condenser (4) is provided with a condensate pipeline, a booster pump (3) is communicated with the evaporator (5), then a steam channel of the evaporator (5) is communicated with the high-temperature heat exchanger (6), a steam channel of the compressor (2) is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also communicated with the steam turbine (1), the steam turbine (1) is also divided into two paths after being communicated with the evaporator (5), wherein the first path is communicated with the compressor (2), and the second path is communicated with the condenser (4); the condenser (4) is also provided with a cooling medium channel communicated with the outside, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power, so that a dual-fuel gas-steam combined cycle power device is formed.
6. The double-fuel gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a primary section combustion chamber, a secondary section combustion chamber and a high-temperature heat regenerator; the external part is provided with a low-grade fuel channel communicated with the primary section combustion chamber (9), the external part is also provided with a high-grade fuel channel communicated with the secondary section combustion chamber (10), the external part is also provided with an air channel communicated with the second compressor (7), then the second compressor (7) is provided with an air channel communicated with the second compressor through a high-temperature heat regenerator (11), the second compressor (7) is also provided with an air channel communicated with the primary section combustion chamber (9), the primary section combustion chamber (9) is also provided with a primary section gas channel communicated with the secondary section combustion chamber (10), and the secondary section combustion chamber (10) is also provided with a gas channel communicated with the external part through a gas turbine (8), a high-temperature heat regenerator (11) and a high-temperature heat exchanger (6); the condenser (4) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (5) through the booster pump (3), then the evaporator (5) is further provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is further provided with a steam channel to be communicated with the steam turbine (1), the steam turbine (1) is further provided with a low-pressure steam channel to be communicated with the evaporator (5) and then divided into two paths, namely, the first path is communicated with the compressor (2) and the second path is communicated with the condenser (4); the condenser (4) is also provided with a cooling medium channel which is communicated with the outside, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power, so that the dual-fuel gas-steam combined cycle power device is formed.
7. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices disclosed by claims 1-6, a gas channel is additionally arranged on an evaporator (5) and is communicated with the outside to form the dual-fuel gas-steam combined cycle power device.
8. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices disclosed by claims 1 to 6, a heat supply device is additionally arranged, a low-pressure steam channel of a steam turbine (1) is communicated with an evaporator (5) and then divided into two paths, namely a first path is communicated with a compressor (2) and a second path is communicated with a condenser (4), the steam turbine (1) is adjusted to be provided with the low-pressure steam channel to be communicated with a heat supply device (12) and then divided into two paths, namely the first path is communicated with the compressor (2) and the second path is communicated with the condenser (4), the evaporator (5) is additionally provided with a gas channel to be communicated with the outside, and the heat supply device (12) is also provided with a heated medium channel to be communicated with the outside to form the dual-fuel gas-steam combined cycle power device.
9. A dual-fuel gas-steam combined cycle power device is characterized in that a middle-temperature heat regenerator is added in any one dual-fuel gas-steam combined cycle power device of claims 1 to 7, a steam channel of an evaporator (5) is communicated with a high-temperature heat exchanger (6) and adjusted to be communicated with the high-temperature heat exchanger (6) through a middle-temperature heat regenerator (13), a steam channel of a compressor (2) is communicated with the high-temperature heat exchanger (6) and adjusted to be communicated with a steam channel of the compressor (2) and communicated with the high-temperature heat exchanger (6) through the middle-temperature heat regenerator (13), a low-pressure steam channel of a steam turbine (1) is communicated with the evaporator (5) and adjusted to be communicated with a low-pressure steam channel of the steam turbine (1) and communicated with the evaporator (5) through the middle-temperature heat regenerator (13), and the dual-fuel gas-steam combined cycle power device is formed.
10. A dual-fuel gas-steam combined cycle power device is characterized in that a middle-temperature regenerator is added in any one of the dual-fuel gas-steam combined cycle power devices of claims 1 to 7, a steam channel of an evaporator (5) is communicated with a high-temperature heat exchanger (6) and adjusted to be communicated with the evaporator (5) through the middle-temperature regenerator (13) and communicated with the high-temperature heat exchanger (6), a steam channel of a compressor (2) is communicated with the high-temperature heat exchanger (6) and adjusted to be communicated with the compressor (2) through the middle-temperature regenerator (13), a steam channel of the high-temperature heat exchanger (6) is communicated with a steam turbine (1) and a low-pressure steam channel of the steam turbine (1) is communicated with the evaporator (5) and adjusted to be communicated with the high-temperature heat exchanger (6) through the middle-temperature regenerator (13), the steam turbine (1) and the steam channel of the steam turbine (1) are communicated with the steam turbine (1) through the middle-temperature regenerator (13) and communicated with the evaporator (5) through the low-pressure steam channel, and a dual-fuel gas-steam combined cycle power device is formed.
11. A dual-fuel gas-steam 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 gas-steam combined cycle power devices of claims 1 to 10, a condenser (4) is provided with a condensate liquid pipeline which is communicated with the booster pump (3) and adjusted to be that the condenser (4) is provided with a condensate liquid pipeline which is communicated with the low-temperature heat regenerator (15) through a second booster pump (14), a compressor (2) is provided with a steam extraction channel which is communicated with the low-temperature heat regenerator (15), and the low-temperature heat regenerator (15) is further provided with a condensate liquid pipeline which is communicated with the booster pump (3), so that the dual-fuel gas-steam combined cycle power device is formed.
12. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices of claims 1 to 11, a high heat exchanger (6) is provided with a steam channel to be communicated with a steam turbine (1) and is adjusted to be that the high heat exchanger (6) is provided with a steam channel to be communicated with the steam turbine (1) through a primary section combustion chamber (9), so that the dual-fuel gas-steam combined cycle power device is formed.
13. A dual-fuel gas-steam combined cycle power device is characterized in that in any one of the dual-fuel gas-steam combined cycle power devices disclosed in claims 1-12, an expansion speed increaser (16) is added to replace a steam turbine (1), a dual-energy compressor (17) is added to replace a compressor (2), a diffuser pipe (18) is added to replace a booster pump (3), and the dual-fuel gas-steam combined cycle power device is formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110073507X | 2021-01-12 | ||
| CN202110073507 | 2021-01-12 |
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| Publication Number | Publication Date |
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| CN115263470A true CN115263470A (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210057753.0A Pending CN115263470A (en) | 2021-01-12 | 2022-01-11 | Dual-fuel gas-steam combined cycle power device |
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| Country | Link |
|---|---|
| CN (1) | CN115263470A (en) |
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