CN115217562A - Dual-fuel gas-steam combined cycle power device - Google Patents

Dual-fuel gas-steam combined cycle power device Download PDF

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Publication number
CN115217562A
CN115217562A CN202210057754.5A CN202210057754A CN115217562A CN 115217562 A CN115217562 A CN 115217562A CN 202210057754 A CN202210057754 A CN 202210057754A CN 115217562 A CN115217562 A CN 115217562A
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China
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communicated
steam
combustion chamber
channel
temperature heat
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李鸿瑞
李华玉
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/08—Adaptations for driving, or combinations with, pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • 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 combustion chamber, a high-grade fuel channel is arranged outside and communicated with the secondary combustion chamber, an air channel is arranged outside and respectively and directly communicated with the primary combustion chamber through a second compressor and communicated with the secondary combustion chamber through the primary combustion chamber, the primary combustion chamber is provided with a primary fuel gas channel and communicated with the secondary combustion chamber, and the secondary 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 communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is provided with a steam channel communicated with the steam turbine, and the steam turbine is provided with a low-pressure steam channel respectively communicated with the compressor and the condenser through the evaporator; the condenser is provided with a cooling medium channel 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

Dual-fuel gas-steam combined cycle power device
The technical field is as follows:
the invention belongs to the technical field of thermodynamics and thermodynamics.
Background art:
cold demand, heat demand and power demand, which are common in human life and production; among them, the conversion of chemical energy of 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 view of the temperature of fuel gas formed by combustion (such as constant pressure combustion temperature), high-grade fuel with high constant pressure combustion temperature can convert more mechanical energy corresponding to a high-grade heat source; low-grade fuel with low constant pressure combustion temperature is difficult to form high-temperature combustion products, and can convert less mechanical energy corresponding to a low-grade heat source compared with the former.
In a conventional gas-steam power plant, 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 gas 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 different items 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 is provided with a low-grade fuel channel communicated with the primary combustion chamber, the external part is also provided with a high-grade fuel channel communicated with the secondary combustion chamber, the external part is also provided with an air channel communicated with the second compressor and then divided into two paths, wherein the first path is communicated with the primary combustion chamber, the second path is communicated with the secondary combustion chamber through the primary combustion chamber, the primary combustion chamber is also provided with a primary combustion gas channel communicated with the secondary combustion chamber, and the secondary combustion chamber is also provided with a combustion 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 which is communicated with the evaporator through a booster pump, then the evaporator is further provided with a steam channel which is communicated with the high-temperature heat exchanger, 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 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 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 which is divided into two paths after being communicated with the high-temperature heat regenerator through a second compressor, wherein the first path is communicated with the primary section combustion chamber, the second path is communicated with the secondary section combustion chamber through the primary section combustion chamber, the primary section combustion chamber is also provided with a primary section gas channel communicated with the secondary section combustion chamber, and the secondary section combustion chamber is also provided with a 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.
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 is provided with a low-grade fuel channel communicated with the first-stage combustion chamber, the external part is also provided with a high-grade fuel channel communicated with the second-stage combustion chamber, the external part is also provided with an air channel communicated with the second compressor and then divided into two paths, namely, the first path is communicated with the first-stage combustion chamber, and the second path is communicated with the second-stage combustion chamber through the first-stage combustion chamber and the high-temperature heat regenerator; the first section combustion chamber is also provided with a first section gas channel which is communicated with the second section combustion chamber through a high-temperature heat regenerator, and the second section combustion chamber is also provided with a gas channel which is communicated with the outside 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 combustion chamber, the external part is also provided with a high-grade fuel channel communicated with the secondary combustion chamber, the external part is also provided with an air channel which is divided into two paths after being communicated with the high-temperature heat regenerator through a second compressor, wherein the first path is communicated with the primary combustion chamber, the second path is communicated with the secondary combustion chamber through the primary combustion chamber, the primary combustion chamber is also provided with a primary gas channel communicated with the secondary combustion chamber, the secondary combustion chamber is also provided with a gas channel communicated with the gas turbine, the gas turbine is further 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 which is communicated with the evaporator through a booster pump, then the evaporator is further provided with a steam channel which is communicated with the high-temperature heat exchanger, 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 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 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 a second compressor and then divided into two paths, wherein the first path is communicated with the primary section combustion chamber, and the second path is communicated with the secondary section combustion chamber through the primary section combustion chamber and a high-temperature regenerator; the first section combustion chamber is also provided with a first section gas channel which is communicated with the second section combustion chamber through a high-temperature heat regenerator, the second section combustion chamber is also provided with a gas channel which is communicated with the gas turbine, then the gas turbine is provided with a gas channel which is communicated with the gas turbine through the high-temperature heat regenerator, and the gas turbine is also provided with a gas channel which is communicated with the outside through a high-temperature heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is further provided with a steam channel which is communicated with the high-temperature heat exchanger, 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 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 combustion chamber, the external part is also provided with a high-grade fuel channel communicated with the secondary combustion chamber, the external part is also provided with an air channel communicated with the second compressor, then the second compressor is also provided with an air channel communicated with the second compressor through a high-temperature heat regenerator, the second compressor is also provided with an air channel which is respectively communicated with the primary combustion chamber directly and the secondary combustion chamber through the primary combustion chamber, the primary combustion chamber is also provided with a primary gas channel communicated with the secondary combustion chamber, and the secondary combustion chamber is also provided with a 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.
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 heat supply device is also communicated with the outside through a heated medium channel, and the evaporator is additionally provided with a gas channel which is 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 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 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 adjusted to be communicated with the high-temperature heat exchanger through the medium-temperature heat regenerator, a low-pressure steam channel of a steam turbine is communicated with the evaporator and adjusted to be communicated with the low-pressure steam channel of the steam turbine through the medium-temperature heat regenerator, and therefore 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 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 adjusted to be communicated with the high-temperature heat exchanger through the medium-temperature heat regenerator, a low-pressure steam channel of a steam turbine is communicated with the evaporator through the medium-temperature heat regenerator, and then the steam turbine is communicated with the evaporator through the low-pressure steam channel to form the dual-fuel gas-steam combined cycle power device.
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 to 11, a high heat exchanger with a steam channel is communicated with a steam turbine and is adjusted to be communicated with the steam turbine through a primary section 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 6 th principal thermodynamic system diagram 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 diagram of a 11 th principal thermodynamic system of a dual fuel gas-steam combined cycle power plant provided in accordance with the present invention.
FIG. 12 is a 12 th principle thermodynamic system diagram of a dual fuel 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) To reveal the differences in the operating sequences of the steam turbine 1 and the expansion gear 16, the following explanations are made here:
(1) in fig. 1, the steam flows through the steam turbine 1 to realize thermal work, the steam at the outlet of the steam turbine 1 has very low pressure and small flow rate (corresponding to small kinetic energy), and the mechanical energy required by the booster pump 3 can be provided by the steam turbine 1 through mechanical transmission or from the outside.
(2) In contrast, in fig. 11, the steam at the outlet of the expansion speed increaser 12 also has a very low pressure, but the flow rate is relatively large (a part of the pressure drop is converted into the kinetic energy of the low-pressure steam) so as to meet the requirements of partial pressure increase of the dual-energy compressor 17 and speed reduction and pressure increase of the diffuser pipe 18.
(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 about the initial stage combustor and the initial stage gas:
(1) according to the requirement, a related heat exchanger (heat exchange tube bundle) is arranged in the primary combustion chamber; for example, a superheater in fig. 12 that heats steam from the high-temperature heat exchanger 6; a reheater for heating the steam from the steam turbine 1.
(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 the heat load of the primary section of the high-temperature heat source and takes on the heating task of the air entering the secondary section combustor 10; sometimes, the circulating steam of the bottom single working medium combined cycle subsystem can be reheated.
(4) Initial stage gas: the fuel gas provided by the primary combustion chamber 9 to the secondary combustion chamber 10 may also contain a part of air required for the combustion of the high-grade fuel in the secondary combustion chamber 10, i.e. the primary fuel gas contains a certain proportion of air.
(3) Description of the fuels:
(1) low-grade fuel: refers to a fuel with relatively low highest temperature (such as adiabatic combustion temperature or constant pressure combustion temperature) formed by combustion products, such as coal gangue, coal slime, combustible garbage and the like. From the concept of heat source, low grade fuel refers to fuel whose combustion products are difficult to form a high temperature heat source of higher temperature.
(2) High-grade fuel: refers to a fuel such as high quality coal, natural gas, methane, hydrogen, etc., that has a relatively high maximum temperature at which combustion products can form (e.g., adiabatic combustion temperature or fixed pressure combustion temperature). From the concept of heat source, a high grade fuel refers to a 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 description is not repeated if necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.
The dual fuel 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; the external part is provided with a low-grade fuel channel communicated with the primary combustion chamber 9, the external part is also provided with a high-grade fuel channel communicated with the secondary combustion chamber 10, the external part is also provided with an air channel communicated with the second compressor 7 and then divided into two paths, namely, the first path is communicated with the primary combustion chamber 9, the second path is communicated with the secondary combustion chamber 10 through the primary combustion chamber 9, the primary combustion chamber 9 is also provided with a primary gas channel communicated with the secondary combustion chamber 10, and the secondary combustion chamber 10 is also provided with a gas channel communicated with the external part through the gas turbine 8 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) In the flow, external air flows through the second compressor 7 to be boosted and heated and then is divided into two paths, wherein the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path flows through the primary combustion chamber 9 to absorb heat and be heated and then enters the secondary combustion chamber 10 to participate in combustion; 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 with higher temperature, and the primary fuel gas releases heat to the air flowing through the primary combustion chamber 9 and then is supplied to the secondary combustion chamber 10; the external high-grade fuel enters the second-stage combustion chamber 10, is mixed with the air from the first-stage combustion chamber 9 and the first-stage fuel gas 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 work, flows through the high-temperature heat exchanger 6 to release heat and reduce the temperature, and is discharged to the outside; 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 evaporator 5 to release heat and reduce temperature and then is divided into two paths, 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 low-temperature heat load is taken away by a cooling medium through the condenser 4, and the low-temperature heat load is taken away by air and fuel gas through an 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; the external part is provided with a low-grade fuel channel communicated with a primary combustion chamber 9, the external part is also provided with a high-grade fuel channel communicated with a secondary combustion chamber 10, the external part is also provided with an air channel which is communicated with a high-temperature heat regenerator 11 through a second compressor 7 and then divided into two paths, wherein the first path is communicated with the primary combustion chamber 9, the second path is communicated with the secondary combustion chamber 10 through the primary combustion chamber 9, the primary combustion chamber 9 is also provided with a primary gas channel communicated with the secondary combustion chamber 10, and the secondary combustion chamber 10 is also provided with a gas channel communicated with the external part 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 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 to be boosted and heated, flows through the high-temperature heat regenerator 11 to absorb heat and be heated, and then is divided into two paths, namely the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path flows through the primary combustion chamber 9 to absorb heat and be heated, and then enters the secondary combustion chamber 10 to participate in combustion; 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 with higher temperature, and the primary fuel gas releases heat to the air flowing through the primary combustion chamber 9 and then is supplied to the secondary combustion chamber 10; the external high-grade fuel enters the second-stage combustion chamber 10, is mixed with the air from the first-stage combustion chamber 9 and the first-stage fuel gas 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 then discharged to the outside to form the dual-fuel gas-steam combined cycle power device.
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 communicated with the primary section combustor 9, the external part is also provided with a high-grade fuel channel communicated with the secondary section combustor 10, the external part is also provided with an air channel communicated with the second compressor 7 and then divided into two paths, namely, the first path is communicated with the primary section combustor 9, and the second path is communicated with the secondary section combustor 10 through the primary section combustor 9 and the high-temperature heat regenerator 11; the primary combustion chamber 9 is also provided with a primary gas channel which is communicated with a secondary combustion chamber 10 through a high-temperature heat regenerator 11, and the secondary combustion chamber 10 is also provided with a gas channel which is 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 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 is divided into two paths after being boosted and heated by the second compressor 7, wherein the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path gradually absorbs heat and is heated by the primary combustion chamber 9 and the high-temperature heat regenerator 11 and then enters the secondary combustion chamber 10 to participate in combustion; 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 with higher temperature, the primary fuel gas releases heat to the air flowing through the primary combustion chamber 9 and absorbs heat to raise the temperature through the high-temperature heat regenerator 11, and then the primary fuel gas is supplied to the secondary combustion chamber 10; the external high-grade fuel enters the second-stage combustion chamber 10, is mixed with the air from the first-stage combustion chamber 9 and the first-stage fuel gas 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 then discharged to the outside 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 communicated with a primary combustion chamber 9, the external part is also provided with a high-grade fuel channel communicated with a secondary combustion chamber 10, the external part is also provided with an air channel which is communicated with a high-temperature heat regenerator 11 through a second compressor 7 and then divided into two paths, namely, the first path is communicated with the primary combustion chamber 9, the second path is communicated with the secondary combustion chamber 10 through the primary combustion chamber 9, the primary combustion chamber 9 is also provided with a primary gas channel communicated with the secondary combustion chamber 10, the secondary 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 self through the high-temperature heat regenerator 11, and the gas turbine 8 is also provided with a gas channel 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 to be boosted and heated, flows through the high-temperature heat regenerator 11 to absorb heat and be heated, and then is divided into two paths, namely the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path flows through the primary combustion chamber 9 to absorb heat and be heated, and then enters the secondary combustion chamber 10 to participate in combustion; 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 with higher temperature, and the primary fuel gas releases heat to the air flowing through the primary combustion chamber 9 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 air from the primary combustion chamber 9 and the primary fuel gas and is combusted into high-temperature and high-pressure fuel gas, the high-temperature and high-pressure fuel gas generated by the secondary combustion chamber 10 enters a gas turbine 8 to be decompressed and worked 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 be continuously decompressed and worked; the gas discharged by the gas turbine 8 passes through the high-temperature heat exchanger 6 to release heat and reduce temperature, and then is discharged outwards, 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; 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 second compressor 7 and then divided into two paths, wherein the first path is communicated with the primary section combustion chamber 9, and the second path is communicated with the secondary section combustion chamber 10 through the primary section combustion chamber 9 and the high-temperature heat regenerator 11; the first section combustion chamber 9 is also provided with a first section gas channel which is communicated with a second section combustion chamber 10 through a high temperature heat regenerator 11, the second section combustion chamber 10 is also provided with a gas channel which is communicated with the gas turbine 8, then the gas turbine 8 is also provided with a gas channel which is communicated with the gas turbine 8 through the high temperature heat regenerator 11, and the gas turbine 8 is also provided with a gas channel which is communicated with the outside 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 is divided into two paths after being boosted and heated by the second compressor 7, wherein the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path gradually absorbs heat and is heated by the primary combustion chamber 9 and the high-temperature heat regenerator 11 and then enters the secondary combustion chamber 10 to participate in combustion; 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 with higher temperature, and the primary fuel gas releases heat to the air flowing through the primary combustion chamber 9 and supplies the heat to the secondary combustion chamber 10 after the heat absorption and the temperature rise of the air flowing through the high-temperature heat regenerator 11; the external high-grade fuel enters a secondary combustion chamber 10, is mixed with the air from the primary combustion chamber 9 and the primary fuel gas and is combusted into high-temperature high-pressure fuel gas, the high-temperature high-pressure fuel 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 cool, and then enters the gas turbine 8 to continue to perform pressure reduction work; the gas discharged by the gas turbine 8 passes through the high-temperature heat exchanger 6 to release heat and reduce temperature, and then is discharged outwards, 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; the external part is provided with a low-grade fuel channel which is communicated with the primary combustion chamber 9, the external part is also provided with a high-grade fuel channel which is communicated with the secondary combustion chamber 10, the external part is also provided with an air channel which is communicated with the secondary compressor 7 and then communicated with the secondary combustion chamber 10 through a high-temperature heat regenerator 11, the secondary compressor 7 is also provided with an air channel which is respectively communicated with the primary combustion chamber 9 directly and communicated with the secondary combustion chamber 10 through the primary combustion chamber 9, the primary combustion chamber 9 is also provided with a primary gas channel which is communicated with the secondary combustion chamber 10, and the secondary combustion chamber 10 is also provided with a 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 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, then enters the second compressor 7 to be boosted and heated continuously, and then is divided into two paths, wherein the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path flows through the primary combustion chamber 9 to absorb heat and be heated and then enters the secondary combustion chamber 10 to participate in combustion; the external low-grade fuel enters the primary combustion chamber 9, the low-grade fuel and the air are mixed in the primary combustion chamber 9 and are combusted into high-temperature primary fuel gas, and the primary fuel gas releases heat to the air flowing through the primary combustion chamber 9 and then is supplied to the secondary combustion chamber 10; the external high-grade fuel enters the second-stage combustion chamber 10, is mixed with the air from the first-stage combustion chamber 9 and the first-stage fuel gas 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 then discharged to the outside 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 enters the evaporator 5 after being boosted by the booster pump 3, absorbs heat in low-pressure steam from the steam turbine 1 and 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, the second path is communicated with the condenser 4, a heated medium channel of the heat supply device 12 is communicated with the outside, and the evaporator 5 is additionally provided with a gas 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, 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 is reduced in pressure and does work through the steam turbine 1, the low-pressure steam discharged by the steam turbine 1 is divided into two paths after being released and cooled through the heat supplier 12, the first path enters the compressor 2 for boosting and heating, and the second path enters the condenser 4 for releasing heat and condensing; 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, cooling medium takes away low-temperature heat load through the condenser 4, air and fuel gas take away the low-temperature heat load through the inlet and outlet flow, and the heat supplier 12 is also communicated with the outside through a heated medium channel; 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 is boosted by the booster pump 3, absorbed heat, heated and vaporized by the evaporator 5, continuously absorbed heat by the medium-temperature heat regenerator 13, absorbed heat and heated by the high-temperature heat exchanger 6, absorbed heat and heated by the medium-temperature heat regenerator 13, and absorbed heat and heated by the high-temperature heat exchanger 6; 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 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 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 that the compressor 2 has the steam channel 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 that the steam turbine 1 has the steam channel communicated with the steam channel through the middle temperature heat regenerator 13, and then the steam turbine 1 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 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, then enters the high-temperature heat exchanger 6 to absorb heat and be heated, and the steam discharged by the compressor 2 flows through the medium-temperature heat regenerator 13 to absorb heat and be heated, and then enters the high-temperature heat exchanger 6 to absorb heat and be heated; 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 reduce temperature, 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 plant shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, the communication between a condensate pipeline of the condenser 4 and the booster pump 3 is adjusted to be that the condenser 4 is provided with a condensate pipeline which is communicated with the low-temperature heat regenerator 15 through a second booster pump 14, the 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 pipeline which is communicated with 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 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 temperature, and the extracted steam releases heat to form condensate; the condensate of the low-temperature heat regenerator 15 flows through the booster pump 3 to be boosted, flows 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 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 then enters the high-temperature heat exchanger 6 to form the dual-fuel gas-steam combined cycle power device.
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 flow, external air is divided into two paths after being boosted and heated by the second compressor 7, wherein the first path directly enters the primary combustion chamber 9 to participate in combustion, and the second path enters the secondary combustion chamber 10 to participate in combustion after being absorbed and heated by 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 with higher temperature, and the primary fuel gas releases heat to the air and the circulating steam flowing through the primary combustion chamber 9 and then is supplied to the secondary combustion chamber 10; the external high-grade fuel enters the second-stage combustion chamber 10, is mixed with the air from the first-stage combustion chamber 9 and the first-stage fuel gas 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 work, flows through the high-temperature heat exchanger 6 to release heat and reduce the temperature, and is discharged to the outside; 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; steam discharged by the high-temperature heat exchanger 6 flows through the primary section combustion chamber 9 to absorb heat and raise temperature, then enters the steam turbine 1 to reduce pressure and do work, low-pressure steam discharged by the steam turbine 1 flows through the evaporator 5 to release heat and lower temperature, then is divided into two paths, the first path enters the compressor 2 to increase pressure and raise 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 low-temperature heat load is taken away by a cooling medium through the condenser 4, and the low-temperature heat load is taken away by air and fuel gas through an 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 realized by:
(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 to provide high-temperature driving heat load together, so that the fuel cost is effectively reduced.
(2) The high-temperature driving heat load is utilized in a grading manner, the irreversible loss caused by temperature difference is obviously reduced, and the heat power change efficiency is effectively improved.
(3) The low-grade fuel finishes the temperature increase of compressed air and provides the high-grade fuel, and the irreversible temperature difference loss 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; 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 a second compressor (7) and then divided into two paths, namely, the first path is communicated with the primary combustion chamber (9), the second path is communicated with the secondary combustion chamber (10) through the primary combustion chamber (9), the primary combustion chamber (9) is also provided with a primary gas channel which is communicated with the secondary combustion chamber (10), and the secondary combustion chamber (10) is also provided with a gas channel which is communicated with the external part 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; the external part is provided with a low-grade fuel channel communicated with a primary section combustion chamber (9), the external part is also provided with a high-grade fuel channel communicated with a secondary section combustion chamber (10), the external part is also provided with an air channel which is communicated with a high-temperature heat regenerator (11) through a second compressor (7) and then divided into two paths, namely, the first path is communicated with the primary section combustion chamber (9), the second path is communicated with the secondary section combustion chamber (10) through 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), 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; 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) and then divided into two paths, wherein the first path is communicated with the primary section combustion chamber (9), and the second path is communicated with the secondary section combustion chamber (10) through the primary section combustion chamber (9) and the high-temperature regenerator (11); 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), and the secondary combustion chamber (10) is also provided with a gas channel which is 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 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.
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 a primary section combustion chamber (9), the external part is also provided with a high-grade fuel channel communicated with a secondary section combustion chamber (10), the external part is also provided with an air channel which is communicated with a high-temperature heat regenerator (11) through a second compressor (7) and then divided into two paths, namely, the first path is communicated with the primary section combustion chamber (9), the second path is communicated with the secondary section combustion chamber (10) through 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), 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 provided with the gas channel communicated with the gas turbine through the high-temperature heat regenerator (11), and the gas turbine (8) is also provided 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 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 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) and then divided into two paths, wherein the first path is communicated with the primary section combustion chamber (9), and the second path is communicated with the secondary section combustion chamber (10) through the primary section combustion chamber (9) and the high-temperature regenerator (11); the primary combustion chamber (9) is also provided with a primary gas channel which is communicated with a 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 gas turbine (8) through the high-temperature heat regenerator (11), and the gas turbine (8) is also provided with a gas channel which is communicated with the outside through 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.
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 which is communicated with the primary combustion chamber (9), the external part is also provided with a high-grade fuel channel which is communicated with the secondary combustion chamber (10), the external part is also provided with an air channel which is communicated with the secondary compressor (7) and then communicated with the secondary compressor (7) through a high-temperature heat regenerator (11), the secondary compressor (7) is also provided with an air channel which is respectively and directly communicated with the primary combustion chamber (9) and communicated with the secondary combustion chamber (10) through the primary combustion chamber (9), the primary combustion chamber (9) is also provided with a primary gas channel which is communicated with the secondary combustion chamber (10), and the secondary combustion chamber (10) is also provided with a 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) 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 in claims 1-6, a gas channel is additionally arranged on an evaporator (5) and 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 a heat supplier is added in any one dual-fuel gas-steam combined cycle power device of claims 1 to 6, 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 a low-pressure steam channel to be communicated with a heat supplier (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 heat supplier (12) is also provided with a heated medium channel to be communicated with the outside, and the fuel gas channel of the evaporator (5) is communicated with the outside to form the additional 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 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 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 the high-temperature heat exchanger (6) through a steam channel of the compressor (2) 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 the low-pressure steam channel of the steam turbine (1) and 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 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) through the middle-temperature heat regenerator (13) to be communicated with the high-temperature heat exchanger (6), a low-pressure steam channel of a steam turbine (1) is communicated with the evaporator (5) and adjusted to be communicated with the steam channel of the steam turbine (1) through the middle-temperature heat regenerator (13), and then the low-pressure steam channel of the steam turbine (1) is communicated with the evaporator (5) to form the dual-fuel gas-steam combined cycle power device.
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 disclosed in claims 1-11, a high heat exchanger (6) is communicated with a steam turbine (1) through a steam channel, and the high heat exchanger (6) is communicated with the steam turbine (1) through a primary combustion chamber (9) through the steam channel, 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.
CN202210057754.5A 2021-01-12 2022-01-11 Dual-fuel gas-steam combined cycle power device Pending CN115217562A (en)

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CN202110073622 2021-01-12

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