CN115217542A - Combined cycle power plant - Google Patents

Combined cycle power plant Download PDF

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Publication number
CN115217542A
CN115217542A CN202010488480.6A CN202010488480A CN115217542A CN 115217542 A CN115217542 A CN 115217542A CN 202010488480 A CN202010488480 A CN 202010488480A CN 115217542 A CN115217542 A CN 115217542A
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CN
China
Prior art keywords
communicated
temperature
evaporator
circulating pump
expander
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CN202010488480.6A
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Chinese (zh)
Inventor
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
    • 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]

Abstract

The invention provides a combined cycle power device, and belongs to the technical field of energy and power. The condenser is communicated with the mixed evaporator through a circulating pump, the expander is provided with a low-pressure steam channel communicated with the mixed evaporator, the mixed evaporator is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor and communicated with the condenser through a second expander, the compressor is also provided with a steam channel communicated with a high-temperature heat exchanger, the condenser is communicated with the high-temperature evaporator through a second circulating pump, the high-temperature evaporator is provided with a steam channel communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel communicated with the expander, the condenser is communicated with a second high-temperature evaporator through a third circulating pump, and the second high-temperature evaporator is provided with a steam channel communicated with the expander through an intermediate steam inlet channel; the high-temperature heat exchanger, the high-temperature evaporator and the second high-temperature evaporator are 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 the 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 as heat is released, and the heat source is changed in temperature. 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 device, and the specific contents of the invention are explained in the following sections:
1. the combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second 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 second 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 high-temperature heat exchanger after the condensate pipeline is communicated with the high-temperature evaporator through the second circulating pump, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, the condenser is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator through a third circulating pump, and the second high-temperature evaporator is also provided with a steam channel which is communicated with the expander through an intermediate steam inlet channel; the high-temperature heat exchanger, the high-temperature evaporator and the second 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 is connected with the compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected compressor, circulating pump, second circulating pump and third circulating pump and is transmitted power.
2. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator and a heat supply device; 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 is also provided with a low-pressure steam channel which is respectively communicated with the compressor and the condenser through a second 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 high-temperature heat exchanger after the condensate pipeline is communicated with the high-temperature evaporator through the second circulating pump, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, the condenser is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator through a third circulating pump, and the second high-temperature evaporator is also provided with a steam channel which is communicated with the expander through an intermediate steam inlet channel; the high-temperature heat exchanger, the high-temperature evaporator and the second high-temperature evaporator are also respectively communicated with the outside through heat source medium channels, the condenser is also communicated with the outside through a cooling medium channel, the mixed 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 compressor, circulating pump, second circulating pump and third circulating pump and is transmitted power.
3. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second 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 is also provided with a low-pressure steam channel which is respectively communicated with the compressor and the condenser through a second expander, the compressor is also provided with a steam channel which is communicated with a high-temperature heat exchanger through the high-temperature heat regenerator, the condenser is also provided with a condensate pipeline which is 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 high-temperature heat exchanger through the high-temperature heat regenerator, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, and the condenser is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator through a third circulating pump, and then the second high-temperature evaporator is further provided with a steam channel which is communicated with the expander through an intermediate steam inlet channel; the high-temperature heat exchanger, the high-temperature evaporator and the second 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 is connected with the compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected compressor, circulating pump, second circulating pump and third circulating pump and is transmitted power.
4. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a heat supplier 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 communicated with the condenser through a second expander, the compressor is also provided with a steam channel which is communicated with a high-temperature heat exchanger through a high-temperature heat regenerator, the condenser is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator after the condensate pipeline is communicated with the high-temperature evaporator through the second circulating pump, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, and the condenser is also provided with a steam channel which is communicated with the expander through a middle steam inlet channel after the condensate pipeline is communicated with the second high-temperature evaporator through a third circulating pump; the high-temperature heat exchanger, the high-temperature evaporator and the second high-temperature evaporator are also respectively communicated with the outside through heat source medium channels, 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, the heat supply device 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 compressor, circulating pump, second circulating pump and third circulating pump and is transmitted power.
5. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a second compressor and a second high-temperature heat exchanger; 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 second 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 high-temperature evaporator after the condensate pipeline is communicated with the high-temperature evaporator through the second circulating pump, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the second compressor, the second compressor is also provided with a steam channel which is communicated with the expander through the second high-temperature heat exchanger, the condenser is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator through a third circulating pump, and the second high-temperature evaporator is also provided with a steam channel which is communicated with the expander through an intermediate steam inlet channel; the high-temperature heat exchanger, the high-temperature evaporator, the second high-temperature evaporator and the second high-temperature heat exchanger are also respectively communicated with the outside through heat source medium channels, 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 is connected with the compressor and the second compressor and transmits power to form a combined cycle power device; wherein, or the expander is connected compressor, second compressor, circulating pump, second circulating pump and third circulating pump and is transmitted power.
6. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a second high-temperature heat exchanger and a third 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 mixed evaporator is also provided with a low-pressure steam channel which is respectively communicated with the compressor and the condenser through a second 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 high-temperature evaporator after the condensate pipeline is communicated with the high-temperature evaporator through the second circulating pump, the high-temperature heat exchanger is also provided with a steam channel which is communicated with a third expander, the third expander is also provided with a steam channel which is communicated with the expander through the second high-temperature heat exchanger, the condenser is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator through the third circulating pump, and the second high-temperature evaporator is also provided with a steam channel which is communicated with the expander through an intermediate steam inlet channel; the high-temperature heat exchanger, the high-temperature evaporator, the second high-temperature evaporator and the second high-temperature heat exchanger 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 mixed 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, second circulating pump and third circulating pump and is transmitted power.
7. A combined cycle power device is characterized in that a low-temperature heat regenerator and a fourth 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 high-temperature evaporator through the second circulating pump is adjusted to be communicated with the low-temperature heat regenerator through the second circulating pump, a middle steam extraction channel is additionally arranged on a compressor and communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the high-temperature evaporator through the fourth circulating pump with the condensate pipeline, so that the combined cycle power device is formed.
8. A combined cycle power device is characterized in that in any one of the combined cycle power devices in items 1 to 7, a newly added heat regenerator and a newly added circulating pump are added, a condenser is provided with a condensate pipeline which is communicated with a second high-temperature evaporator through a third circulating pump, the condenser is adjusted to be provided with a condensate pipeline which is communicated with the newly added heat regenerator through the third circulating pump, a middle steam extraction channel is additionally arranged on a compressor to be communicated with the newly added heat regenerator, and the newly added heat regenerator is provided with a condensate pipeline which is communicated with the second 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 principal thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
FIG. 6 is a diagram of a 6 th principle thermodynamic system of a 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-compressor, 3-second expander, 4-circulating pump, 5-second circulating pump, 6-third circulating pump, 7-high temperature heat exchanger, 8-high temperature evaporator, 9-second high temperature evaporator, 10-condenser, 11-hybrid evaporator (waste heat boiler), 12-heat supplier, 13-high temperature regenerator, 14-second compressor, 15-second high temperature heat exchanger, 16-third expander, 17-low temperature regenerator, 18-fourth 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 procedures are 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 such that:
(1) Structurally, the system mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 10 is provided with a condensate pipeline which is communicated with a mixing evaporator 11 through a circulating pump 4, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 11, the mixing evaporator 11 is also provided with a low-pressure steam channel which is respectively and directly communicated with a compressor 2 and communicated with the condenser 10 through a second expander 3, the compressor 2 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 7, the condenser 10 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 8 through a second circulating pump 5, then the high-temperature evaporator 8 is further provided with a steam channel which is communicated with the high-temperature heat exchanger 7, the high-temperature heat exchanger 7 is further provided with a steam channel which is communicated with the expander 1, the condenser 10 is also provided with a condensate pipeline which is communicated with a second high-temperature evaporator 9 through a third circulating pump 6, and then the second high-temperature evaporator 9 is further provided with a steam channel which is communicated with the expander 1 through a middle steam inlet channel; the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9 are also respectively communicated with the outside through heat source medium channels, the condenser 10 is also communicated with the outside through a cooling medium channel, and the expander 1 is connected with the compressor 2 and transmits power.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 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 2, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the second expansion machine 3, is depressurized and does work, and then enters the condenser 10 to release heat and is condensed; a second path of condensate of the condenser 10 is boosted by a second circulating pump 5 and enters a high-temperature evaporator 8 to absorb heat, raise temperature, vaporize and overheat, and then enters a high-temperature heat exchanger 7 to absorb heat and raise temperature; a third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, then enters an expander 1 through a middle steam inlet channel to reduce pressure and do work, steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce pressure and do work, and low-pressure steam discharged by the expander 1 enters a mixed evaporator 11 to release heat and lower temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9, the cooling medium takes low-temperature heat load through the condenser 10, and the expander 1 and the second expander 3 provide power for the compressor 2 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 2 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator and a heat supply device; the condenser 10 has a condensate pipeline communicated with a mixing evaporator 11 through a circulating pump 4, the expander 1 has a low-pressure steam channel communicated with the mixing evaporator 11 through a heat supply device 12, the mixing evaporator 11 also has a low-pressure steam channel which is respectively and directly communicated with the compressor 2 and communicated with the condenser 10 through a second expander 3, the compressor 2 also has a steam channel communicated with the high-temperature heat exchanger 7, the condenser 10 also has a condensate pipeline communicated with the high-temperature evaporator 8 through a second circulating pump 5, then the high-temperature evaporator 8 has a steam channel communicated with the high-temperature heat exchanger 7, the high-temperature heat exchanger 7 also has a steam channel communicated with the expander 1, the condenser 10 also has a condensate pipeline communicated with the second high-temperature evaporator 9 through a third circulating pump 6, then the second high-temperature evaporator 9 has a steam channel communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9 are respectively communicated with the outside through a heat source medium channel, the condenser 10 is communicated with the outside through a cooling medium channel, the heat supplier 12 is communicated with the outside through a heated medium channel, and the expander 1 is connected with the compressor 2 and transmits power.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 to be mixed with the low-pressure steam from the heat supply device 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 2, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the second expander 3, is depressurized and does work, and then enters the condenser 10, releases heat and is condensed; a second path of condensate of the condenser 10 is boosted by a second circulating pump 5 and enters a high-temperature evaporator 8 to absorb heat, raise temperature, vaporize and overheat, and then enters a high-temperature heat exchanger 7 to absorb heat and raise temperature; a third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, then enters an expander 1 through a middle steam inlet channel to reduce pressure and do work, steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce pressure and do work, low-pressure steam discharged by the expander 1 flows through a heat supply device 12 to release heat and reduce temperature, and then enters a mixed evaporator 11 to release heat and reduce temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9, the cooling medium takes low-temperature heat load through the condenser 10, the medium to be heated provides medium-temperature heat load taken by the heat supply device 12, and the expander 1 and the second expander 3 provide power for the compressor 2 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 3 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator and a high-temperature heat regenerator; the condenser 10 is provided with a condensate pipeline which is communicated with a mixing evaporator 11 through a circulating pump 4, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 11 through a high-temperature heat regenerator 13, the mixing evaporator 11 is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor 2 and communicated with the condenser 10 through a second expander 3, the compressor 2 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, the condenser 10 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 8 through a second circulating pump 5, then the high-temperature evaporator 8 is provided with a steam channel which is communicated with the high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, the high-temperature heat exchanger 7 is also provided with a steam channel which is communicated with the expander 1, and the condenser 10 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 9 through a third circulating pump 6 and then the second high-temperature evaporator 9 is provided with a steam channel which is communicated with the expander 1 through a middle steam inlet channel; the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9 are also respectively communicated with the outside through heat source medium channels, the condenser 10 is also communicated with the outside through a cooling medium channel, and the expander 1 is connected with the compressor 2 and transmits power.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 to be mixed with the low-pressure steam from the high-temperature heat regenerator 13, 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 2 to be boosted and heated, and the second path flows through the second expander 3 to be decompressed and work, and then enters the condenser 10 to release heat and be condensed; the steam discharged by the compressor 2 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; a second path of condensate of the condenser 10 is boosted by a second circulating pump 5 and enters a high-temperature evaporator 8 to absorb heat, raise temperature, vaporize and overheat, flows through a high-temperature heat regenerator 13 to absorb heat, raise temperature, and then enters a high-temperature heat exchanger 7 to absorb heat and raise temperature; a third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, then enters an expander 1 through a middle steam inlet channel to reduce pressure and do work, steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce pressure and do work, low-pressure steam discharged by the expander 1 flows through a high-temperature heat regenerator 13 to release heat and reduce temperature, and then enters a mixed evaporator 11 to release heat and reduce temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9, the cooling medium takes low-temperature heat load through the condenser 10, and the expander 1 and the second expander 3 provide power for the compressor 2 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 4 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a heat supply device and a high-temperature heat regenerator; the condenser 10 has a condensate pipeline communicated with the mixing evaporator 11 through a circulating pump 4, the expander 1 has a low-pressure steam channel communicated with the mixing evaporator 11 through a high-temperature heat regenerator 13 and a heat supply device 12, the mixing evaporator 11 also has a low-pressure steam channel respectively communicated with the compressor 2 directly and communicated with the condenser 10 through a second expander 3, the compressor 2 also has a steam channel communicated with a high-temperature heat exchanger 7 through a high-temperature heat regenerator 13, the condenser 10 also has a steam channel communicated with the high-temperature evaporator 8 through a second circulating pump 5, then the high-temperature evaporator 8 has a steam channel communicated with the high-temperature heat exchanger 7 through the high-temperature heat regenerator 13, the high-temperature heat exchanger 7 also has a steam channel communicated with the expander 1, the condenser 10 also has a steam channel communicated with the second high-temperature evaporator 9 through a third circulating pump 6, and then the second high-temperature evaporator 9 has a steam channel communicated with the expander 1 through a middle steam inlet channel; the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9 are also respectively communicated with the outside through a heat source medium channel, the condenser 10 is also communicated with the outside through a cooling medium channel, the heat supply device 12 is also communicated with the outside through a heated medium channel, and the expander 1 is connected with the compressor 2 and transmits power.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 to be mixed with the low-pressure steam from the heat supply device 12, 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 2 to be boosted and heated, the second path flows through the second expander 3 to be decompressed and work, and then enters the condenser 10 to release heat and be condensed; the steam discharged by the compressor 2 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; a second path of condensate of the condenser 10 is boosted by a second circulating pump 5 and enters a high-temperature evaporator 8 to absorb heat, raise temperature, vaporize and overheat, flows through a high-temperature heat regenerator 13 to absorb heat, raise temperature, and then enters a high-temperature heat exchanger 7 to absorb heat and raise temperature; the third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, then enters an expansion machine 1 through a middle steam inlet channel to reduce pressure and do work, and steam discharged by a high-temperature heat exchanger 7 flows through the expansion machine 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 flows through the high-temperature heat regenerator 13 and the heat supplier 12 to gradually release heat and cool, and then enters the mixing evaporator 11 to release heat and cool; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9, the cooling medium takes low-temperature heat load through the condenser 10, the medium to be heated provides medium-temperature heat load taken away by the heater 12, and the expander 1 and the second expander 3 provide power for the compressor 2 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 5 is implemented as follows:
(1) Structurally, the system mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a second compressor and a second high-temperature heat exchanger; the condenser 10 is provided with a condensate pipeline which is communicated with a mixing evaporator 11 through a circulating pump 4, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 11, the mixing evaporator 11 is also provided with a low-pressure steam channel which is respectively and directly communicated with a compressor 2 and communicated with the condenser 10 through a second expander 3, the compressor 2 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 7, the condenser 10 is also provided with a steam channel which is communicated with the high-temperature heat exchanger 7 after the condensate pipeline is communicated with the high-temperature evaporator 8 through a second circulating pump 5, the high-temperature heat exchanger 7 is also provided with a steam channel which is communicated with a second compressor 14, the second compressor 14 is also provided with a steam channel which is communicated with the expander 1 through a second high-temperature heat exchanger 15, the condenser 10 is also provided with a condensate pipeline which is communicated with a second high-temperature evaporator 9 through a third circulating pump 6, and then the steam channel which is provided with the second high-temperature evaporator 9 is also provided with a steam channel which is communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 7, the high-temperature evaporator 8, the second high-temperature evaporator 9 and the second high-temperature heat exchanger 15 are respectively communicated with the outside through heat source medium channels, the condenser 10 is also communicated with the outside through a cooling medium channel, and the expander 1 is connected with the compressor 2 and the second compressor 14 and transmits power.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 to be mixed with the low-pressure steam from the expander 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 2, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the second expander 3, is depressurized and does work, and then enters the condenser 10 to release heat and is condensed; the second path of condensate of the condenser 10 is boosted by a second circulating pump 5, enters a high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, and then enters a high-temperature heat exchanger 7 to absorb heat and be heated; the steam discharged by the high-temperature heat exchanger 7 flows through the second compressor 14 to increase the pressure and the temperature, flows through the second high-temperature heat exchanger 15 to absorb heat and increase the temperature, and then enters the expander 1 to reduce the pressure and do work; a third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, and then enters an expander 1 through a middle steam inlet channel to reduce pressure and do work; the low-pressure steam discharged by the expander 1 enters the hybrid evaporator 11 to release heat and reduce the temperature, the heat source medium provides a driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8, the second high-temperature evaporator 9 and the second high-temperature heat exchanger 15, the cooling medium takes away the low-temperature heat load through the condenser 10, and the expander 1 and the second expander 3 provide power for the compressor 2, the second compressor 14 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 6 is implemented such that:
(1) Structurally, the system mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a second high-temperature heat exchanger and a third expander; the condenser 10 is provided with a condensate pipeline which is communicated with a mixing evaporator 11 through a circulating pump 4, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 11, the mixing evaporator 11 is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor 2 and communicated with the condenser 10 through a second expander 3, the compressor 2 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 7, the condenser 10 is also provided with a steam channel which is communicated with the high-temperature evaporator 8 through a second circulating pump 5, then the high-temperature evaporator 8 is further provided with a steam channel which is communicated with the high-temperature heat exchanger 7, the high-temperature heat exchanger 7 is further provided with a steam channel which is communicated with a third expander 16, the third expander 16 is further provided with a steam channel which is communicated with the expander 1 through a second high-temperature heat exchanger 15, and the condenser 10 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 9 through a third circulating pump 6, and then the second high-temperature evaporator 9 is further provided with a steam channel which is communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 7, the high-temperature evaporator 8, the second high-temperature evaporator 9 and the second high-temperature heat exchanger 15 are respectively communicated with the outside through heat source medium channels, the condenser 10 is also communicated with the outside through a cooling medium channel, and the expander 1 is connected with the compressor 2 and transmits power.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 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 2, is boosted, is heated, enters the high-temperature heat exchanger 7, absorbs heat and is heated, the second path flows through the second expansion machine 3, is depressurized and does work, and then enters the condenser 10 to release heat and is condensed; the second path of condensate of the condenser 10 is boosted by a second circulating pump 5, enters a high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, and then enters a high-temperature heat exchanger 7 to absorb heat and be heated; the steam discharged by the high-temperature heat exchanger 7 flows through the third expander 16 to reduce the pressure and do work, flows through the second high-temperature heat exchanger 15 to absorb heat and raise the temperature, and then enters the expander 1 to reduce the pressure and do work; the third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, and then enters an expansion machine 1 through a middle steam inlet channel to reduce pressure and do work; the low-pressure steam discharged by the expander 1 enters the hybrid evaporator 11 to release heat and reduce the temperature, a heat source medium provides a driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8, the second high-temperature evaporator 9 and the second high-temperature heat exchanger 15, a cooling medium takes away a low-temperature heat load through the condenser 10, and the expander 1, the second expander 3 and the third expander 16 provide power for the compressor 2 and 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 fourth circulating pump are added, a condensate pipeline of a condenser 10 is communicated with a high-temperature evaporator 8 through a second circulating pump 5 and adjusted to be communicated with the low-temperature heat regenerator 17 through the second circulating pump 5, a middle steam extraction channel of the condenser 10 is additionally arranged on a compressor 2 and is communicated with the low-temperature heat regenerator 17, and the low-temperature heat regenerator 17 is communicated with the high-temperature evaporator 8 through a condensate pipeline of the fourth circulating pump 18.
(2) In the process, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 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 2 to be boosted and heated, the second path flows through the second expansion machine 3 to be decompressed and work, and then enters the condenser 10 to release heat and be condensed; the low-pressure steam entering the compressor 2 is subjected to pressure rise and temperature rise to a certain degree and then is divided into two paths, wherein the first path enters the low-temperature heat regenerator 17 through the middle steam extraction channel to release heat and condense, the second path is subjected to pressure rise and temperature rise continuously, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 7 to absorb heat and raise the temperature; the second path of condensate of the condenser 10 is boosted by the second circulating pump 5 and enters the low-temperature heat regenerator 17, and is mixed with the extracted steam from the compressor 2 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 17 is boosted by a fourth circulating pump 18 and then enters the high-temperature evaporator 8 to absorb heat, raise the temperature, vaporize and overheat, and then enters the high-temperature heat exchanger 7 to absorb heat and raise the temperature; the third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, then enters an expander 1 through a middle steam inlet channel to reduce pressure and do work, steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce pressure and do work, and low-pressure steam discharged by the expander 1 enters a mixed evaporator 11 to release heat and lower temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9, the cooling medium takes the low-temperature heat load away through the condenser 10, and the expander 1 and the second expander 3 provide power for the compressor 2 and the outside to form a combined cycle power device.
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 10 is communicated with a second high-temperature evaporator 9 through a third circulating pump 6 and adjusted to be that the condenser 10 is communicated with the newly added heat regenerator A through the third circulating pump 6, a middle steam extraction channel is additionally arranged on a compressor 2 and is communicated with the newly added heat regenerator A, and the newly added heat regenerator A is communicated with the second high-temperature evaporator 9 through a condensate pipeline of the newly added circulating pump B.
(2) In the flow, the first path of condensate of the condenser 10 is boosted by the circulating pump 4 and enters the mixing evaporator 11 to be mixed with the low-pressure steam from the expander 1, the mixture absorbs heat and is heated and vaporized into saturated or superheated steam, and then the saturated or superheated steam is divided into two paths, namely the first path enters the compressor 2 to be boosted and heated, and the second path flows through the second expander 3 to be decompressed and work and then enters the condenser 10 to release heat and be condensed; the low-pressure steam entering the compressor 2 is subjected to pressure rise and temperature rise 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, the second path is subjected to pressure rise and temperature rise continuously, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 7 to absorb heat and raise the temperature; the second path of condensate of the condenser 10 is boosted by a second circulating pump 5, enters a high-temperature evaporator 8, absorbs heat, is heated, vaporized and overheated, and then enters a high-temperature heat exchanger 7 to absorb heat and be heated; the third path of condensate of the condenser 10 is boosted by a third circulating pump 6 and enters a newly-added heat regenerator A, and is mixed with the extracted steam from the compressor 2 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 exchanger A is boosted by a newly-added circulating pump B and then enters a second high-temperature evaporator 9 to absorb heat, raise temperature, vaporize and overheat, and then enters an expander 1 through a middle steam inlet channel to reduce pressure and do work, the steam discharged by the high-temperature heat exchanger 7 flows through the expander 1 to reduce pressure and do work, and the low-pressure steam discharged by the expander 1 enters a mixed evaporator 11 to release heat and lower temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 7, the high-temperature evaporator 8 and the second high-temperature evaporator 9, the cooling medium takes low-temperature heat load through the condenser 10, and the expander 1 and the second expander 3 provide power for the compressor 2 and the outside to form a combined cycle power device.
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 working medium mainly depends on the condensation phase change process to realize low-temperature heat release, the temperature difference loss between the cycle working medium and the environment is controllable, and the heat efficiency is 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 the lower cycle, namely the 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) The high-temperature expander is shared, the number of core equipment is reduced, and the system investment is favorably reduced and the heat efficiency is favorably improved.
(7) The lower part adopts a double-expansion process, which is beneficial to flexibly adjusting working parameters and adaptability.
(8) The device can effectively deal with high-temperature heat sources and variable-temperature heat sources, high-quality fuels and non-high-quality fuels, and has a wide application range.
(9) 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.
(10) The heat recovery of the enterprise device can be simply, actively, safely and efficiently realized.
(11) The heat efficiency of the combined gas-steam cycle is effectively improved by applying the combined gas-steam cycle to the lower end.
(12) When the system is applied to a coal-fired thermodynamic system, the original advantages of the traditional steam power cycle, namely water vapor as a working medium, can be kept, and the working parameter range is wide; depending on the implementation, it may be selected to operate in a subcritical, critical, supercritical or ultra-supercritical state, etc.

Claims (8)

1. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (10) is provided with a condensate pipeline which is communicated with the mixed evaporator (11) through a circulating pump (4), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (11), the mixed evaporator (11) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (2) and communicated with the condenser (10) through a second expander (3), the compressor (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (10) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (5), then the high-temperature evaporator (8) is 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 a steam channel which is communicated with the expander (1), the condenser (10) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (9) through a third circulating pump (6), and then the second high-temperature evaporator (9) is provided with a steam channel which is communicated with the expander (1) through an intermediate steam inlet channel; the high-temperature heat exchanger (7), the high-temperature evaporator (8) and the second high-temperature evaporator (9) are also respectively communicated with the outside through a heat source medium channel, the condenser (10) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (11) or the heat source medium channel is communicated with the outside, and the expander (1) is connected with the compressor (2) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (2), the circulating pump (4), the second circulating pump (5) and the third circulating pump (6) and transmits power.
2. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator and a heat supply device; the condenser (10) is provided with a condensate pipeline which is communicated with a mixing evaporator (11) through a circulating pump (4), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixing evaporator (11) through a heat supply device (12), the mixing evaporator (11) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (2) and communicated with the condenser (10) through a second expander (3), the compressor (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (10) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (5), then the high-temperature evaporator (8) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), then the high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1), the condenser (10) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (9) through a third circulating pump (6), and then the steam channel of the second high-temperature evaporator (9) is communicated with the expander (1) through an intermediate steam inlet channel; the high-temperature heat exchanger (7), the high-temperature evaporator (8) and the second high-temperature evaporator (9) are also respectively communicated with the outside through a heat source medium channel, the condenser (10) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (11) or the heat source medium channel is communicated with the outside, the heat supply device (12) is also communicated with the outside through a heated medium channel, and the expander (1) is connected with the compressor (2) and transmits power to form a combined cycle power device; wherein, or expander (1) connects compressor (2), circulating pump (4), second circulating pump (5) and third circulating pump (6) and transmits power.
3. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator and a high-temperature heat regenerator; the condenser (10) is provided with a condensate pipeline which is communicated with the mixed evaporator (11) through a circulating pump (4), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (11) through a high-temperature heat regenerator (13), the mixed evaporator (11) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (2) and communicated with the condenser (10) through a second expander (3), the compressor (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), the condenser (10) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (5), then the high-temperature evaporator (8) 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 high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1), and the condenser (10) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (9) through a middle steam inlet channel which is also communicated with the expander (1); the high-temperature heat exchanger (7), the high-temperature evaporator (8) and the second high-temperature evaporator (9) are also respectively communicated with the outside through a heat source medium channel, the condenser (10) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (11) or the heat source medium channel is communicated with the outside, and the expander (1) is connected with the compressor (2) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (2), the circulating pump (4), the second circulating pump (5) and the third circulating pump (6) and transmits power.
4. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a heat supplier and a high-temperature heat regenerator; the condenser (10) is provided with a condensate pipeline which is communicated with the mixed evaporator (11) through a circulating pump (4), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (11) through a high-temperature heat regenerator (13) and a heat supply device (12), the mixed evaporator (11) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (2) and communicated with the condenser (10) through a second expander (3), the compressor (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), the condenser (10) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (5), then the high-temperature evaporator (8) 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 high-temperature heat exchanger (7) is also provided with a steam channel which is communicated with the expander (1), and the condenser (10) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (9) through an intermediate steam channel which is communicated with the expander (1) through a third circulating pump (6); the high-temperature heat exchanger (7), the high-temperature evaporator (8) and the second high-temperature evaporator (9) are also respectively communicated with the outside through a heat source medium channel, the condenser (10) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (11) or the heat source medium channel is communicated with the outside, the heat supply device (12) is also communicated with the outside through a heated medium channel, and the expander (1) is connected with the compressor (2) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (2), the circulating pump (4), the second circulating pump (5) and the third circulating pump (6) and transmits power.
5. The combined cycle power plant mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a second compressor and a second high-temperature heat exchanger; the condenser (10) is provided with a condensate pipeline which is communicated with the mixed evaporator (11) through a circulating pump (4), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (11), the mixed evaporator (11) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (2) and communicated with the condenser (10) through a second expander (3), the compressor (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (10) is also provided with a steam channel which is communicated with the high-temperature evaporator (8) through a second circulating pump (5), then the high-temperature evaporator (8) is 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 a steam channel which is communicated with a second compressor (14), the second compressor (14) is also provided with a steam channel which is communicated with the expander (1) through a second high-temperature heat exchanger (15), and the condenser (10) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (9) through an intermediate steam channel which is communicated with the expander (1) through a third circulating pump (6); the high-temperature heat exchanger (7), the high-temperature evaporator (8), the second high-temperature evaporator (9) and the second high-temperature heat exchanger (15) are also respectively communicated with the outside through a heat source medium channel, the condenser (10) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (11) or the heat source medium channel is communicated with the outside, and the expander (1) is connected with the compressor (2) and the second compressor (14) and transmits power to form a combined cycle power device; wherein, or expander (1) connects compressor (2), second compressor (14), circulating pump (4), second circulating pump (5) and third circulating pump (6) and transmits power.
6. The combined cycle power device mainly comprises an expander, a compressor, a second expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser, a mixed evaporator, a second high-temperature heat exchanger and a third expander; the condenser (10) is provided with a condensate pipeline which is communicated with a mixed evaporator (11) through a circulating pump (4), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (11), the mixed evaporator (11) is also provided with a low-pressure steam channel which is respectively communicated with the compressor (2) directly and communicated with the condenser (10) through a second expander (3), the compressor (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (7), the condenser (10) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through a second circulating pump (5), then the high-temperature evaporator (8) 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 a steam channel which is communicated with a third expander (16), the third expander (16) is also provided with a steam channel which is communicated with the expander (1) through a second high-temperature heat exchanger (15), and the condenser (10) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (9) through a middle steam inlet channel which is communicated with the expander (1); the high-temperature heat exchanger (7), the high-temperature evaporator (8), the second high-temperature evaporator (9) and the second high-temperature heat exchanger (15) are also respectively communicated with the outside through heat source medium channels, the condenser (10) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (11) or the heat source medium channels are communicated with the outside, and the expander (1) is connected with the compressor (2) and transmits power to form a combined cycle power device; wherein, or the expander (1) is connected with the compressor (2), the circulating pump (4), the second circulating pump (5) and the third circulating pump (6) and transmits power.
7. A combined cycle power device is characterized in that a low-temperature heat regenerator and a fourth circulating pump are added in the combined cycle power device as claimed in any one of claims 1 to 6, a condenser (10) is provided with a condensate pipeline which is communicated with a high-temperature evaporator (8) through a second circulating pump (5) and is adjusted to be that the condenser (10) is provided with a condensate pipeline which is communicated with a low-temperature heat regenerator (17) through the second circulating pump (5), a middle steam extraction channel is additionally arranged on a compressor (2) and is communicated with the low-temperature heat regenerator (17), and the low-temperature heat regenerator (17) is provided with a condensate pipeline which is communicated with the high-temperature evaporator (8) through the fourth circulating pump (18) 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 to 7, a condenser (10) is communicated with a second high-temperature evaporator (9) through a third circulating pump (6) and adjusted to be that the condenser (10) is communicated with a newly added heat regenerator (A) through a third circulating pump (6) through a condensed liquid pipeline, a middle steam extraction channel is additionally arranged on a compressor (2) and is communicated with the newly added heat regenerator (A), and the newly added heat regenerator (A) is communicated with the second high-temperature evaporator (9) through a newly added circulating pump (B) through a condensed liquid pipeline to form the combined cycle power device.
CN202010488480.6A 2019-05-27 2020-05-25 Combined cycle power plant Pending CN115217542A (en)

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CN2019104955940 2019-05-27
CN201910495594 2019-05-27

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CN115217542A true CN115217542A (en) 2022-10-21

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