CN115217543A - Combined cycle power plant - Google Patents

Combined cycle power plant Download PDF

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Publication number
CN115217543A
CN115217543A CN202010488501.4A CN202010488501A CN115217543A CN 115217543 A CN115217543 A CN 115217543A CN 202010488501 A CN202010488501 A CN 202010488501A CN 115217543 A CN115217543 A CN 115217543A
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China
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communicated
expander
evaporator
temperature
circulating pump
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CN202010488501.4A
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Chinese (zh)
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李鸿瑞
李华玉
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B21/00—Combinations of two or more machines or engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01B23/08—Adaptations for driving, or combinations with, pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • 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
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, 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
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

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

Abstract

The invention provides a combined cycle power device, and belongs to the technical field of energy and power. The condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator, the mixed evaporator is also provided with a low-pressure steam channel which is respectively communicated with the compressor and the condenser through a third expander, the compressor is also provided with a steam channel which is communicated with the high-temperature heat exchanger, the condenser is also provided with a steam channel which is communicated with the second expander after the condensate pipeline is communicated with the high-temperature evaporator through a second circulating pump, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger, and the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively communicated with the outside through a heat source medium channel, the condenser is also communicated with the outside through a cooling medium channel, and the expander is connected with the compressor and transmits power to form a combined cycle power device.

Description

Combined cycle power plant
The technical field is as follows:
the invention belongs to the technical field of energy and power.
Background art:
cold demand, heat demand and power demand, which are common in human life and production; among them, the conversion of thermal energy into mechanical energy is an important way to obtain and provide power. In general, the temperature of the heat source decreases with the release of heat, and the heat source is variable. When fossil fuel is used as a source energy source, the heat source has the dual characteristics of high temperature and variable temperature, so that a power device based on single thermodynamic cycle is difficult to convert more heat energy into mechanical energy; for high-quality fuel, high thermal efficiency can be obtained by adopting the traditional gas-steam combined cycle, but the problems of high manufacturing cost, large investment, thermal efficiency to be improved and the like still exist.
Taking an external combustion type steam power device as an example, a heat source of the external combustion type steam power device belongs to a high-temperature and variable-temperature heat source; when Rankine cycle is taken as a theoretical basis and steam is taken as a cycle working medium to realize thermal power conversion, the limitation of temperature resistance, pressure resistance and safety of materials is applied, so that no matter what parameters are adopted for operation, large temperature difference loss exists between the cycle working medium and a heat source, irreversible loss is large, the heat efficiency is low, and the potential for improving the heat efficiency is great.
People need to simply, actively, safely and efficiently utilize heat energy to obtain power, and therefore the combined cycle steam power plant has the advantages of high heat efficiency, high safety, adaptability to high-temperature heat sources or variable-temperature heat sources and capability of coping with various fuels.
The invention content is as follows:
the invention mainly aims to provide a combined cycle power plant, and the specific contents are set forth in the following sections:
1. the combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser and a mixed evaporator; the condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator, the mixed evaporator is also provided with a low-pressure steam channel which is respectively communicated with the compressor and the condenser through a third expander, the compressor is also provided with a steam channel which is communicated with the high-temperature heat exchanger, the condenser is also provided with a steam channel which is communicated with the second expander after the condensate pipeline is communicated with the high-temperature evaporator through a second circulating pump, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger, and the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, and the expander is connected with the compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected with the compressor, the circulating pump and the second circulating pump and transmits power.
2. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a heat supplier; the condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator through a heat supply device, the mixed evaporator and a low-pressure steam channel are respectively and directly communicated with the compressor and the condenser through a third expander, the compressor is also provided with a steam channel which is communicated with the high-temperature heat exchanger, the condenser is also provided with a steam channel which is communicated with the second expander after the condensate pipeline is communicated with the high-temperature evaporator through a second circulating pump, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger, and the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively communicated with the outside through a heat source medium channel, the condenser is also communicated with the outside through a cooling medium channel, the hybrid evaporator or the heat source medium channel is also communicated with the outside, the heat supplier is also communicated with the outside through a heated medium channel, and the expander is connected with the compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected with the compressor, the circulating pump and the second circulating pump and transmits power.
3. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a fourth expander; the condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator, the fourth expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator, the mixed evaporator and the low-pressure steam channel are respectively and directly communicated with the compressor and the condenser through a third expander, the compressor and the steam channel are communicated with the high-temperature heat exchanger, the condenser and the condensate pipeline are communicated with the high-temperature evaporator through the second circulating pump, then the high-temperature evaporator is further provided with a steam channel which is communicated with the second expander, the second expander is further provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is further provided with an intermediate steam channel which is communicated with the fourth expander, and the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively communicated with the outside through a heat source medium channel, the condenser is also communicated with the outside through a cooling medium channel, the hybrid evaporator or the heat source medium channel is communicated with the outside, and the expander and the fourth expander are connected with the compressor and transmit power to form a combined cycle power device; wherein, or expander and fourth expander are connected compressor, circulating pump and second circulating pump and are transmitted power.
4. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a fourth expander; the condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator through a heat supply device, the fourth expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator through the heat supply device, the mixed evaporator and the low-pressure steam channel are respectively and directly communicated with the compressor and the condenser through a third expander, the compressor is also provided with a steam channel which is communicated with the high-temperature heat exchanger, the condenser and the condensate pipeline are communicated with the high-temperature evaporator through a second circulating pump, then the high-temperature evaporator is further provided with a steam channel which is communicated with the second expander, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is further provided with an intermediate steam channel which is communicated with the fourth expander, and the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, the heat supplier is also provided with a heated medium channel communicated with the outside, and the expander and the fourth expander are connected with the compressor and transmit power to form a combined cycle power device; wherein, or expander and fourth expander are connected compressor, circulating pump and second circulating pump and are transmitted power.
5. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a high-temperature heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator through a high-temperature heat regenerator, the mixed evaporator and a low-pressure steam channel are respectively and directly communicated with the compressor and the condenser through a third expander, the compressor is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, the condenser is also provided with a steam channel which is communicated with the high-temperature evaporator through a second circulating pump, the high-temperature evaporator is further communicated with a second expander, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, and the high-temperature heat exchanger is further communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, and the expander is connected with the compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected compressor, circulating pump and second circulating pump and is transmitted power.
6. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a high-temperature heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel which is communicated with the mixed evaporator through a high-temperature heat regenerator and a heat supplier, the mixed evaporator is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor and is communicated with the condenser through a third expander, the compressor is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, the condenser is also provided with a steam channel which is communicated with the second expander after the condensate pipeline is communicated with the high-temperature evaporator through a second circulating pump, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, and the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander; the high-temperature heat exchanger and the high-temperature evaporator are also respectively provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, the heat supplier is also provided with a heated medium channel communicated with the outside, and the expander is connected with the compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected with the compressor, the circulating pump and the second circulating pump and transmits power.
7. A combined cycle power device is characterized in that a low-temperature heat regenerator and a third circulating pump are added in any one of the combined cycle power devices in items 1-6, a condenser with a condensate pipeline communicated with a mixed evaporator through the circulating pump is adjusted to be a condenser with a condensate pipeline communicated with the low-temperature heat regenerator through the circulating pump, a middle steam extraction channel is additionally arranged on a compressor to be communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the mixed evaporator through the third circulating pump through the condensate pipeline to form the combined cycle power device.
8. A combined cycle power device is characterized in that in any one of the combined cycle power devices 1-7, a newly-added heat regenerator and a newly-added circulating pump are added, a condenser with a condensate pipeline communicated with a high-temperature evaporator through a second circulating pump is adjusted to be communicated with the newly-added heat regenerator through the second circulating pump, a middle steam extraction channel is additionally arranged on a compressor and communicated with the newly-added heat regenerator, and the newly-added heat regenerator with the condensate pipeline communicated with the high-temperature evaporator through the newly-added circulating pump, so that the combined cycle power device is formed.
Description of the drawings:
FIG. 1 is a schematic 1 st thermodynamic system diagram of a combined cycle power plant according to the present invention.
FIG. 2 is a schematic thermodynamic system diagram of the 2 nd principle of a combined cycle power plant provided in accordance with the present invention.
FIG. 3 is a schematic thermodynamic system diagram of the 3 rd principle of a combined cycle power plant provided in accordance with the present invention.
FIG. 4 is a diagram of a 4 th principal thermodynamic system of a 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 combined cycle power plant provided in accordance with the present invention.
FIG. 6 is a 6 th principal thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 7 is a 7 th principle thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 8 is a diagram of an 8 th principle thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
In the figure, 1-expander, 2-second expander, 3-compressor, 4-third expander, 5-circulating pump, 6-second circulating pump, 7-high temperature heat exchanger, 8-high temperature evaporator, 9-condenser, 10-mixed evaporator (waste heat boiler), 11-heat supplier, 12-fourth expander, 13-high temperature regenerator, 14-low temperature regenerator, 15-third circulating pump; a-adding a heat regenerator and B-adding a circulating pump.
The specific implementation mode is as follows:
it is to be noted that, in the description of the structure and the flow, the repetition is not necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.
The combined cycle power plant shown in fig. 1 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser and a mixed evaporator; the condenser 9 has condensate pipeline to communicate with mixed evaporator 10 through the circulating pump 5, the expander 1 has low-pressure steam channel to communicate with mixed evaporator 10, mixed evaporator 10 also has low-pressure steam channel to communicate with compressor 3 and communicate with condenser 9 through the third expander 4 directly separately, the compressor 3 also has steam channel to communicate with high-temperature heat exchanger 7, the condenser 9 also has condensate pipeline to communicate with high-temperature evaporator 8 through the second circulating pump 6 after the high-temperature evaporator 8 has steam channel to communicate with second expander 2 again, the second expander 2 also has steam channel to communicate with high-temperature heat exchanger 7, the high-temperature heat exchanger 7 also has steam channel to communicate with expander 1; the high-temperature heat exchanger 7 and the high-temperature evaporator 8 are also respectively communicated with the outside through a heat source medium channel, the condenser 9 is also communicated with the outside through a cooling medium channel, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with the low-pressure steam from the expansion machine 1, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, then the mixture is divided into two paths, the first path enters the compressor 3, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the third expansion machine 4, is depressurized and does work, and then enters the condenser 9, releases heat and is condensed; the second path of condensate of the condenser 9 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and does work, and then enters the high-temperature heat exchanger 7 to absorb heat and be heated; the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce the pressure and do work, and the low-pressure steam discharged by the expander 1 enters the hybrid evaporator 10 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the high-temperature evaporator 8, the cooling medium takes away low-temperature heat load through the condenser 9, the expander 1 provides power for the compressor 3, and the expander 1, the second expander 2 and the third expander 4 provide power to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 2 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a heat supply device; the condenser 9 has condensate pipeline to communicate with mixed evaporator 10 through the circulating pump 5, the expander 1 has low-pressure steam channel to communicate with mixed evaporator 10 through the heat supply device 11, the mixed evaporator 10 also has low-pressure steam channel to communicate with compressor 3 directly and communicate with condenser 9 through the third expander 4 respectively, the compressor 3 also has steam channel to communicate with high-temperature heat exchanger 7, the condenser 9 also has condensate pipeline to communicate with high-temperature evaporator 8 through the second circulating pump 6, the high-temperature evaporator 8 has steam channel to communicate with second expander 2 again, the second expander 2 also has steam channel to communicate with high-temperature heat exchanger 7, the high-temperature heat exchanger 7 also has steam channel to communicate with expander 1; the high-temperature heat exchanger 7 and the high-temperature evaporator 8 are also respectively communicated with the outside through a heat source medium channel, the condenser 9 is also communicated with the outside through a cooling medium channel, the heat supplier 11 is also communicated with the outside through a heated medium channel, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with the low-pressure steam from the heat supply device 11, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, then the mixture is divided into two paths, the first path enters the compressor 3, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the third expander 4, is depressurized and does work, and then enters the condenser 9, releases heat and is condensed; the second path of condensate of the condenser 9 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and does work, and then enters the high-temperature heat exchanger 7 to absorb heat and be heated; the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce the pressure and do work, and the low-pressure steam discharged by the expander 1 flows through the heat supplier 11 to release heat and reduce the temperature and then enters the hybrid evaporator 10 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the high-temperature evaporator 8, the cooling medium takes low-temperature heat load through the condenser 9, the heated medium takes medium-temperature heat load through the heat supplier 11, the expander 1 provides power for the compressor 3, and the expander 1, the second expander 2 and the third expander 4 provide power to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 3 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a fourth expander; a condensate pipeline of the condenser 9 is communicated with a mixing evaporator 10 through a circulating pump 5, a low-pressure steam channel of the expander 1 is communicated with the mixing evaporator 10, a low-pressure steam channel of the fourth expander 12 is communicated with the mixing evaporator 10, the mixing evaporator 10 and a low-pressure steam channel are respectively and directly communicated with the compressor 3 and the condenser 9 through a third expander 4, the compressor 3 and a steam channel are communicated with a high-temperature heat exchanger 7, the condenser 9 and a condensate pipeline are communicated with the high-temperature evaporator 8 through a second circulating pump 6, then the high-temperature evaporator 8 is further communicated with a steam channel and a second expander 2, the second expander 2 is further communicated with the high-temperature heat exchanger 7, the high-temperature heat exchanger 7 is also communicated with the fourth expander 12, and the high-temperature heat exchanger 7 is further communicated with the steam channel and the expander 1; the high-temperature heat exchanger 7 and the high-temperature evaporator 8 are also respectively communicated with the outside through a heat source medium channel, the condenser 9 is also communicated with the outside through a cooling medium channel, and the expander 1 and the fourth expander 12 are connected with the compressor 3 and transmit power.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with two paths of low-pressure steam from the expansion machine 1 and the fourth expansion machine 12, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, then the mixture is divided into two paths, the first path enters the compressor 3, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat, is heated, flows through the third expansion machine 4, is depressurized, does work, enters the condenser 9, releases heat and is condensed; the second path of condensate of the condenser 9 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and does work, and then enters the high-temperature heat exchanger 7 to absorb heat and be heated; the steam entering the high-temperature heat exchanger 7 absorbs heat and is heated to a certain degree and then is divided into two paths, wherein the first path is provided for the fourth expansion machine 12 to work by reducing the pressure through the middle steam channel of the high-temperature heat exchanger 7, and the second path continuously absorbs heat and heats and then enters the expansion machine 1 to work by reducing the pressure; the low-pressure steam discharged by the fourth expander 12 and the expander 1 is supplied to the mixing evaporator 10, is mixed with the condensate from the circulating pump 5 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the high-temperature evaporator 8, and the cooling medium takes away low-temperature heat load through the condenser 9; the expander 1 and the fourth expander 12 supply power to the compressor 3, and the expander 1, the second expander 2, the third expander 4, and the fourth expander 12 supply power to the outside, thereby forming a combined cycle power plant.
The combined cycle power plant shown in fig. 4 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a fourth expander; a condenser 9 is provided with a condensate pipeline which is communicated with a mixing evaporator 10 through a circulating pump 5, an expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 10 through a heat supply device 11, a fourth expander 12 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 10 through the heat supply device 11, the mixing evaporator 10 is also provided with a low-pressure steam channel which is respectively and directly communicated with a compressor 3 and is communicated with a condenser 9 through a third expander 4, the compressor 3 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 7, the condenser 9 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 8 through a second circulating pump 6, then the high-temperature evaporator 8 is further provided with a steam channel which is communicated with a second expander 2, the second expander 2 is also provided with a steam channel which is communicated with the high-temperature heat exchanger 7, the high-temperature heat exchanger 7 is also provided with an intermediate steam channel which is communicated with the fourth expander 12, and the high-temperature heat exchanger 7 is also provided with a steam channel which is communicated with the expander 1; the high-temperature heat exchanger 7 and the high-temperature evaporator 8 are also respectively communicated with the outside through a heat source medium channel, the condenser 9 is also communicated with the outside through a cooling medium channel, the heat supplier 11 is also communicated with the outside through a heated medium channel, and the expander 1 and the fourth expander 12 are connected with the compressor 3 and transmit power.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with the low-pressure steam from the heat supply device 11, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, then the mixture is divided into two paths, the first path enters the compressor 3, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the third expander 4, is depressurized and does work, and then enters the condenser 9, releases heat and is condensed; the second path of condensate of the condenser 9 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and does work, and then enters the high-temperature heat exchanger 7 to absorb heat and be heated; the steam entering the high-temperature heat exchanger 7 absorbs heat and is heated to a certain degree and then is divided into two paths, wherein the first path is provided for the fourth expansion machine 12 to work by reducing the pressure through the middle steam channel of the high-temperature heat exchanger 7, and the second path continuously absorbs heat and heats and then enters the expansion machine 1 to work by reducing the pressure; the low-pressure steam discharged by the fourth expander 12 and the expander 1 passes through the heat supplier 11 to release heat and reduce the temperature, and then is supplied to the mixing evaporator 10 to be mixed with the condensate from the circulating pump 5 to release heat and reduce the temperature; a heat source medium provides a driving heat load through a high-temperature heat exchanger 7 and a high-temperature evaporator 8, a cooling medium takes away a low-temperature heat load through a condenser 9, and a heated medium takes away a medium-temperature heat load through a heat supply device 11; the expander 1 and the fourth expander 12 supply power to the compressor 3, and the expander 1, the second expander 2, the third expander 4, and the fourth expander 12 supply power to the outside, thereby forming a combined cycle power plant.
The combined cycle power plant shown in fig. 5 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a high-temperature heat regenerator; the condenser 9 has a condensate pipeline communicated with the mixed evaporator 10 through a circulating pump 5, the expander 1 has a low-pressure steam channel communicated with the mixed evaporator 10 through a high-temperature heat regenerator 13, the mixed evaporator 10 also has a low-pressure steam channel respectively and directly communicated with the compressor 3 and communicated with the condenser 9 through a third expander 4, the compressor 3 also has a steam channel communicated with a high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, the condenser 9 also has a condensate pipeline communicated with the high-temperature evaporator 8 through a second circulating pump 6, then the high-temperature evaporator 8 has a steam channel communicated with the second expander 2, the second expander 2 also has a steam channel communicated with the high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, and the high-temperature heat exchanger 7 also has a steam channel communicated with the expander 1; the high-temperature heat exchanger 7 and the high-temperature evaporator 8 are also respectively communicated with the outside through a heat source medium channel, the condenser 9 is also communicated with the outside through a cooling medium channel, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with the low-pressure steam from the expansion machine 1, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, then the saturated or superheated steam is divided into two paths, the first path enters the compressor 3 to be boosted and heated, the second path flows through the third expansion machine 4 to be decompressed and does work, and then enters the condenser 9 to release heat and be condensed; the second path of condensate of the condenser 9 is boosted by a second circulating pump 6 and enters a high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through a second expander 2, is reduced in pressure and works, flows through a high-temperature heat regenerator 13, absorbs heat, is heated, and then enters a high-temperature heat exchanger 7 to absorb heat and heat; the steam discharged by the compressor 3 flows through the high-temperature heat regenerator 13 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 7 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the high-temperature heat regenerator 13 to release heat and reduce the temperature, and then enters the hybrid evaporator 10 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the high-temperature evaporator 8, the cooling medium takes away low-temperature heat load through the condenser 9, the expander 1 provides power for the compressor 3, and the expander 1, the second expander 2 and the third expander 4 provide power to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 6 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a high-temperature heat regenerator; the condenser 9 has a condensate pipeline communicated with the mixing evaporator 10 through the circulating pump 5, the expander 1 has a low-pressure steam channel communicated with the mixing evaporator 10 through the high-temperature heat regenerator 13 and the heat supply device 11, the mixing evaporator 10 also has a low-pressure steam channel which is respectively communicated with the compressor 3 directly and communicated with the condenser 9 through the third expander 4, the compressor 3 also has a steam channel communicated with the high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, the condenser 9 also has a condensate pipeline communicated with the high-temperature evaporator 8 through the second circulating pump 6, then the high-temperature evaporator 8 has a steam channel communicated with the second expander 2, the second expander 2 also has a steam channel communicated with the high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, and the high-temperature heat exchanger 7 also has a steam channel communicated with the expander 1; the high-temperature heat exchanger 7 and the high-temperature evaporator 8 are also respectively communicated with the outside through a heat source medium channel, the condenser 9 is also communicated with the outside through a cooling medium channel, the heat supplier 11 is also communicated with the outside through a heated medium channel, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with the low-pressure steam from the heat supply device 11, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, then the saturated or superheated steam is divided into two paths, the first path enters the compressor 3 to be boosted and heated, the second path flows through the third expansion machine 4 to be decompressed and work, and then enters the condenser 9 to release heat and be condensed; the second path of condensate of the condenser 9 is boosted by a second circulating pump 6 and enters a high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through a second expander 2, is reduced in pressure and works, flows through a high-temperature heat regenerator 13, absorbs heat, is heated, and then enters a high-temperature heat exchanger 7 to absorb heat and heat; the steam discharged by the compressor 3 flows through the high-temperature heat regenerator 13 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 7 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the high-temperature heat regenerator 13 and the heat supply device 11 to gradually release heat and reduce the temperature, and then enters the hybrid evaporator 10 to release heat and reduce the temperature; the heat source medium provides driving heat load through a high-temperature heat exchanger 7 and a high-temperature evaporator 8, the cooling medium takes low-temperature heat load through a condenser 9, the heated medium takes medium-temperature heat load through a heat supply device 11, the expander 1 provides power for the compressor 3, and the expander 1, the second expander 2 and the third expander 4 provide power to the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 7 is implemented as follows:
(1) Structurally, in the combined cycle power plant shown in fig. 1, a low-temperature heat regenerator and a third circulating pump are added, a condensate pipeline of a condenser 9 is communicated with a mixed evaporator 10 through a circulating pump 5, the condensate pipeline of the condenser 9 is communicated with a low-temperature heat regenerator 14 through the circulating pump 5, a middle steam extraction channel is additionally arranged on a compressor 3 and is communicated with the low-temperature heat regenerator 14, and the condensate pipeline of the low-temperature heat regenerator 14 is communicated with the mixed evaporator 10 through a third circulating pump 15.
(2) In the process, the condensate of the condenser 9 is boosted by the circulating pump 5 and enters the low-temperature heat regenerator 14, and is mixed with the extracted steam from the compressor 3 to absorb heat and raise the temperature, and the extracted steam is mixed with the condensate to release heat and condense; the condensate of the low-temperature heat regenerator 14 is boosted by a third circulating pump 15, enters a mixing evaporator 10, is mixed with low-pressure steam from an expander 1, absorbs heat, raises the temperature and is vaporized into saturated or superheated steam, and then is divided into two paths, namely a first path enters a compressor 3, a second path flows through a third expander 4, reduces the pressure, applies work, enters a condenser 9, releases heat and is condensed; the low-pressure steam entering the compressor 3 is subjected to pressure boosting and temperature rising to a certain degree and then is divided into two paths, wherein the first path enters the low-temperature heat regenerator 14 through the middle steam extraction channel to release heat and condense, and the second path is subjected to pressure boosting and temperature rising continuously; the second path of condensate of the condenser 9 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and does work, then enters the high-temperature heat exchanger 7 to absorb heat and be heated, and the steam discharged by the compressor 3 enters the high-temperature heat exchanger 7 to absorb heat and be heated; the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce the pressure and do work, and the low-pressure steam discharged by the expander 1 enters the hybrid evaporator 10 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the high-temperature evaporator 8, the cooling medium takes away low-temperature heat load through the condenser 9, the expander 1 provides power for the compressor 3, and the expander 1, the second expander 2 and the third expander 4 provide power to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 8 is implemented as follows:
(1) Structurally, in the combined cycle power plant shown in fig. 1, a newly added heat regenerator and a newly added circulating pump are added, a condensate pipeline of a condenser 9 is communicated with a high-temperature evaporator 8 through a second circulating pump 6 and adjusted to be communicated with the newly added heat regenerator A through the second circulating pump 6, a middle steam extraction channel of the condenser 9 is additionally arranged to be communicated with the newly added heat regenerator A, and the newly added heat regenerator A is further communicated with the high-temperature evaporator 8 through a condensate pipeline of the newly added circulating pump B.
(2) In the process, the first path of condensate of the condenser 9 is boosted by the circulating pump 5 and enters the mixing evaporator 10 to be mixed with the low-pressure steam from the expansion machine 1, the mixture absorbs heat, is heated and is vaporized into saturated or superheated steam, and then is divided into two paths, namely the first path enters the compressor 3, the second path flows through the third expansion machine 4, is depressurized and does work, and then enters the condenser 9 to release heat and condense; the low-pressure steam entering the compressor 3 is subjected to pressure boosting and temperature rising to a certain degree and then is divided into two paths, wherein the first path enters the newly-added heat regenerator A through the middle steam extraction channel to release heat and condense, and the second path is subjected to pressure boosting and temperature rising continuously; the second path of condensate of the condenser 9 is boosted by the second circulating pump 6 and enters the newly-added heat regenerator A, and is mixed with the extracted steam from the compressor 3 to absorb heat and raise the temperature, and the extracted steam is mixed with the condensate to release heat and condense; the condensate of the newly added heat regenerator A is boosted by the newly added circulating pump B and enters the high-temperature evaporator 8, absorbs heat, raises temperature, vaporizes and overheats, flows through the second expander 2, reduces pressure, works, then enters the high-temperature heat exchanger 7 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the high-temperature heat exchanger 7 to absorb heat and raise temperature; the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce the pressure and do work, and the low-pressure steam discharged by the expander 1 enters the hybrid evaporator 10 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7 and the high-temperature evaporator 8, the cooling medium takes away low-temperature heat load through the condenser 9, the expander 1 provides power for the compressor 3, and the expander 1, the second expander 2 and the third expander 4 provide power to the outside, so that a combined cycle power device is formed.
The effect that the technology of the invention can realize-the combined cycle power device provided by the invention has the following effects and advantages:
(1) The circulating working medium completes high-temperature heat absorption under low pressure, the temperature difference loss between the circulating working medium and a high-temperature heat source is small, and the heat efficiency of a system and the safety of the device are improved.
(2) The cycle fluid mainly depends on the condensation phase change process to realize low-temperature heat release, the temperature difference loss between the cycle fluid and the environment is controllable, and the heat efficiency is favorably improved.
(3) The low-pressure high-temperature operation mode is adopted in the high-temperature area, the contradiction that the heat efficiency, the circulating medium parameters and the pressure and temperature resistance of the pipe are difficult to reconcile in the traditional steam power device is solved, so that the temperature difference loss between a heat source and the circulating medium can be greatly reduced, and the heat efficiency is greatly improved.
(4) The equipment is shared, the heat absorption process of bottom circulation, namely Rankine cycle, is increased, and the heat efficiency is improved.
(5) And a single working medium is adopted, so that the operation cost is reduced, and the adjustment flexibility of the thermal power device is improved.
(6) And the high-temperature expansion machine is shared, so that the number of core equipment is reduced, the system investment is reduced, and the heat efficiency is improved.
(7) The device can effectively deal with high-temperature heat sources and variable-temperature heat sources, and deal with high-quality fuels and non-high-quality fuels, and has wide application range.
(8) On the premise of realizing high thermal efficiency, low-pressure operation can be selected, so that the operation safety of the device is greatly improved.
(9) The heat recovery of the enterprise device can be simply, actively, safely and efficiently realized.
(10) The heat efficiency of the combined gas-steam cycle is effectively improved by applying the combined gas-steam cycle to the lower end.
(11) When the device is applied to a coal-fired thermodynamic system, the original advantage of the traditional steam power cycle, namely water vapor is taken as a working medium, and the working parameter range is wide; according to the actual condition, the working in the subcritical, critical, supercritical or ultra supercritical state can be selected.

Claims (8)

1. The combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser and a mixed evaporator; the condenser (9) is provided with a condensate pipeline which is communicated with the mixed evaporator (10) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (10), the mixed evaporator (10) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (9) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (9) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (6), then the high-temperature evaporator (8) is provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), and the high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1); the high-temperature heat exchanger (7) and the high-temperature evaporator (8) are also respectively communicated with the outside through a heat source medium channel, the condenser (9) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (10) or the heat source medium channel is communicated with the outside, and the expander (1) is connected with the compressor (3) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (3), the circulating pump (5) and the second circulating pump (6) and transmits power.
2. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a heat supplier; the condenser (9) is provided with a condensate pipeline which is communicated with the mixing evaporator (10) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixing evaporator (10) through a heat supply device (11), the mixing evaporator (10) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (9) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (9) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (6), then the high-temperature evaporator (8) is provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), and the high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1); the high-temperature heat exchanger (7) and the high-temperature evaporator (8) are also respectively communicated with the outside through a heat source medium channel, the condenser (9) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (10) or the heat source medium channel is also communicated with the outside, the heat supplier (11) is also communicated with the outside through a heated medium channel, and the expander (1) is connected with the compressor (3) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (3), the circulating pump (5) and the second circulating pump (6) and transmits power.
3. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a fourth expander; the condenser (9) is provided with a condensate pipeline which is communicated with the mixed evaporator (10) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (10), the fourth expander (12) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (10), the mixed evaporator (10) is also provided with a low-pressure steam channel which is respectively communicated with the compressor (3) and the condenser (9) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (9) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (6), then the high-temperature evaporator (8) is also provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the high-temperature heat exchanger (7) is also provided with an intermediate steam channel which is communicated with the fourth expander (12), and the high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1); the high-temperature heat exchanger (7) and the high-temperature evaporator (8) are also respectively communicated with the outside through a heat source medium channel, the condenser (9) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (10) or the heat source medium channel is communicated with the outside, and the expander (1) and the fourth expander (12) are connected with the compressor (3) and transmit power to form a combined cycle power device; wherein, or the expander (1) and the fourth expander (12) are connected with the compressor (3), the circulating pump (5) and the second circulating pump (6) and transmit power.
4. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a fourth expander; the condenser (9) is provided with a condensate pipeline which is communicated with the mixing evaporator (10) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixing evaporator (10) through a heat supply device (11), the fourth expander (12) is provided with a low-pressure steam channel which is communicated with the mixing evaporator (10) through the heat supply device (11), the mixing evaporator (10) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (9) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (9) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (6), then the high-temperature evaporator (8) is also provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the high-temperature heat exchanger (7) is also provided with an intermediate steam channel which is communicated with the fourth expander (12), and the high-temperature heat exchanger (7) is also provided with the expander (1); the high-temperature heat exchanger (7) and the high-temperature evaporator (8) are also respectively communicated with the outside through a heat source medium channel, the condenser (9) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (10) or the heat source medium channel is also communicated with the outside, the heat supplier (11) is also communicated with the outside through a heated medium channel, and the expander (1) and the fourth expander (12) are connected with the compressor (3) and transmit power to form a combined cycle power device; wherein, or the expander (1) and the fourth expander (12) are connected with the compressor (3), the circulating pump (5) and the second circulating pump (6) and transmit power.
5. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator and a high-temperature heat regenerator; the condenser (9) is provided with a condensate pipeline which is communicated with the mixed evaporator (10) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (10) through a high-temperature heat regenerator (13), the mixed evaporator (10) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (9) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7) through the high-temperature heat regenerator (13), the condenser (9) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (6), then the high-temperature evaporator (8) is also provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7) through the high-temperature heat regenerator (13), and the high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1); the high-temperature heat exchanger (7) and the high-temperature evaporator (8) are also respectively communicated with the outside through a heat source medium channel, the condenser (9) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (10) or the heat source medium channel is communicated with the outside, and the expander (1) is connected with the compressor (3) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (3), the circulating pump (5) and the second circulating pump (6) and transmits power.
6. The combined cycle power device mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a high-temperature heat regenerator; the condenser (9) is provided with a condensate pipeline which is communicated with the mixed evaporator (10) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (10) through a high-temperature heat regenerator (13) and a heat supply device (11), the mixed evaporator (10) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (9) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7) through the high-temperature heat regenerator (13), the condenser (9) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (6), then the high-temperature evaporator (8) is also provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7) through the high-temperature heat regenerator (13), and the high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1); the high-temperature heat exchanger (7) and the high-temperature evaporator (8) are also respectively communicated with the outside through a heat source medium channel, the condenser (9) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (10) or the heat source medium channel is also communicated with the outside, the heat supplier (11) is also communicated with the outside through a heated medium channel, and the expander (1) is connected with the compressor (3) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (3), the circulating pump (5) and the second circulating pump (6) and transmits power.
7. A combined cycle power device is characterized in that a low-temperature heat regenerator and a third circulating pump are added in the combined cycle power device as claimed in any one of claims 1 to 6, a condenser (9) is provided with a condensate pipeline which is communicated with a mixed evaporator (10) through a circulating pump (5) and is adjusted to be that the condenser (9) is provided with a condensate pipeline which is communicated with a low-temperature heat regenerator (14) through the circulating pump (5), a middle steam extraction channel is additionally arranged on a compressor (3) and is communicated with the low-temperature heat regenerator (14), and the low-temperature heat regenerator (14) is provided with a condensate pipeline which is communicated with the mixed evaporator (10) through the third circulating pump (15) to form the combined cycle power device.
8. A combined cycle power device is characterized in that a newly added heat regenerator and a newly added circulating pump are added in any combined cycle power device of claims 1-7, a condenser (9) is communicated with a high-temperature evaporator (8) through a second circulating pump (6) and adjusted to be that the condenser (9) is communicated with a newly added heat regenerator (A) through a second circulating pump (6) and provided with a condensate pipeline, a middle steam extraction channel is additionally arranged on a compressor (3) and communicated with the newly added heat regenerator (A), and the newly added heat regenerator (A) is communicated with the high-temperature evaporator (8) through a newly added circulating pump (B) and further provided with a condensate pipeline so as to form the combined cycle power device.
CN202010488501.4A 2019-05-26 2020-05-24 Combined cycle power plant Pending CN115217543A (en)

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