CN115199357A - Combined cycle power plant - Google Patents

Combined cycle power plant Download PDF

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Publication number
CN115199357A
CN115199357A CN202010497678.0A CN202010497678A CN115199357A CN 115199357 A CN115199357 A CN 115199357A CN 202010497678 A CN202010497678 A CN 202010497678A CN 115199357 A CN115199357 A CN 115199357A
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CN
China
Prior art keywords
communicated
temperature
evaporator
heat exchanger
expander
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Pending
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CN202010497678.0A
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Chinese (zh)
Inventor
李鸿瑞
李华玉
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Individual
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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 which is communicated with the mixed evaporator through a high-temperature evaporator, the mixed evaporator is provided with a low-pressure steam channel which is respectively and directly communicated with the compressor and the condenser through a third expander, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the condenser is provided with a pipeline which is communicated with the high-temperature heat exchanger through a second circulating pump, the high-temperature evaporator, the second expander and the second high-temperature heat exchanger, the high-temperature heat exchanger is provided with a steam channel which is communicated with the expander, the condenser is communicated with the second high-temperature evaporator through the third circulating pump, and the second high-temperature evaporator is communicated with the expander through a middle steam inlet channel; the high-temperature heat exchanger, the second 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 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 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 invention provides a combined cycle steam power plant which has high heat efficiency and safety, is suitable for high-temperature heat sources or variable-temperature heat sources and can deal 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 third circulating pump, a high-temperature heat exchanger, a second 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 through a high-temperature 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 condensate pipeline which is 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 a second expander, the second expander is further provided with a steam channel which is communicated with the high-temperature heat exchanger through a second high-temperature heat exchanger, the high-temperature heat exchanger is further provided with a steam channel which is communicated with the expander, and after the condenser is also communicated with the second high-temperature evaporator through a third circulating pump, 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 second high-temperature heat exchanger and the second high-temperature evaporator are respectively communicated with the outside through a heat source medium channel, the high-temperature evaporator or the heat source medium channel is communicated with the outside, the condenser or the cooling medium channel is communicated with the outside, 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 second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second 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 through a second high-temperature 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 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 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 second expander, the second expander is further 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 the third circulating pump, then the second high-temperature evaporator is further provided with a steam channel which is communicated with the expander through a middle steam inlet channel; the high-temperature heat exchanger, the second 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.
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 third circulating pump, a high-temperature heat exchanger, a second 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 through a second high-temperature evaporator and a high-temperature evaporator, the mixed evaporator is also provided with a low-pressure steam channel which is respectively communicated with the compressor directly and 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, 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 the second circulating pump, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the second high-temperature heat exchanger, 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 an intermediate steam inlet channel after the condensate pipeline is communicated with the second high-temperature evaporator through the third circulating pump; the high-temperature heat exchanger, the second high-temperature heat exchanger and the second high-temperature evaporator are respectively communicated with the outside through a heat source medium channel, the high-temperature evaporator or the heat source medium channel is communicated with the outside, the condenser or the cooling medium channel is communicated with the outside, 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 plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second 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 through a high-temperature evaporator and a second high-temperature 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 through the second circulating pump and the high-temperature evaporator, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the second high-temperature heat exchanger, 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 an intermediate steam inlet channel after the condensate pipeline is communicated with the second high-temperature evaporator through the third circulating pump and the second high-temperature evaporator; the high-temperature heat exchanger, the second high-temperature heat exchanger and the second high-temperature evaporator are also respectively communicated with the outside through heat source medium channels, the high-temperature evaporator or the heat source medium channel is also communicated with the outside, the condenser or the cooling medium channel is also 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.
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 third circulating pump, a high-temperature heat exchanger, a second 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 through a second high-temperature heat exchanger and a high-temperature evaporator, the mixed evaporator is also provided with a low-pressure steam channel which is respectively communicated with the compressor directly and 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, the condenser is also provided with a steam channel which is communicated with the high-temperature evaporator through the second circulating pump and then 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 through the second high-temperature heat exchanger, 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 second high-temperature evaporator through the intermediate steam inlet channel and then is communicated with the expander through the condensate pipeline; the high-temperature heat exchanger and the second high-temperature evaporator are also respectively communicated with the outside through a heat source medium channel, the second high-temperature heat exchanger or the heat source medium channel is also communicated with the outside, the high-temperature evaporator or the heat source medium channel is also communicated with the outside, the condenser or the cooling medium channel is also 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.
6. 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 third circulating pump, a high-temperature heat exchanger, a second 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 through a second high-temperature heat exchanger and a second high-temperature 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 through the second circulating pump and the high-temperature evaporator, the second expander is also provided with a steam channel which is communicated with the high-temperature heat exchanger through the second high-temperature heat exchanger, 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 an intermediate steam inlet channel and the second high-temperature evaporator after the condensate pipeline is communicated with the second high-temperature evaporator through the third circulating pump and the second high-temperature evaporator; 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 second high-temperature heat exchanger or the heat source medium channel is communicated with the outside, the condenser or the cooling medium channel is communicated with the outside, 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.
7. 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 third circulating pump, a high-temperature heat exchanger, a second 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 through a second high-temperature heat exchanger, a second high-temperature evaporator and a high-temperature 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 condensate pipeline which is communicated with the high-temperature evaporator through the second circulating pump, 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 through the second high-temperature heat exchanger, the high-temperature heat exchanger is further 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 the third circulating pump, and 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 and the second high-temperature evaporator are respectively provided with a heat source medium channel communicated with the outside, the second high-temperature heat exchanger or the heat source medium channel is communicated with the outside, the high-temperature evaporator or the heat source medium channel is communicated with the outside, the condenser or the cooling medium channel is communicated with the outside, 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.
8. 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 third circulating pump, a high-temperature heat exchanger, a second 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 through a second high-temperature heat exchanger, a high-temperature evaporator and a second high-temperature 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 condensate pipeline which is communicated with the high-temperature evaporator through the second circulating pump, 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 through the second high-temperature heat exchanger, the high-temperature heat exchanger is further 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 the third circulating pump, and 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 and the second high-temperature evaporator are respectively provided with a heat source medium channel communicated with the outside, the second high-temperature heat exchanger or the heat source medium channel is communicated with the outside, the high-temperature evaporator or the heat source medium channel is communicated with the outside, the condenser or the cooling medium channel is communicated with the outside, 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.
9. A combined cycle power plant, which is characterized in that in the combined cycle power plant of item 1, a high temperature regenerator is added, a second expander is communicated and adjusted with the high temperature heat exchanger through a second high temperature heat exchanger by a steam channel, the second expander is communicated and adjusted with the high temperature heat exchanger through a second high temperature heat exchanger and a high temperature regenerator by a steam channel, a compressor is communicated and adjusted with the high temperature heat exchanger by a steam channel, the high temperature regenerator is communicated and adjusted with a mixed evaporator by a high temperature evaporator by a low pressure steam channel, and the expander is communicated and adjusted with the mixed evaporator by a low pressure steam channel, the high temperature regenerator and the high temperature evaporator, so as to form the combined cycle power plant.
10. A combined cycle power plant, wherein a high temperature heat regenerator is added in the combined cycle power plant of item 2, a second expander is communicated with the high temperature heat exchanger through a second high temperature heat exchanger and adjusted to be communicated with the high temperature heat exchanger through a second high temperature heat exchanger and a steam channel of the second expander, a compressor is communicated with the high temperature heat exchanger and adjusted to be communicated with the high temperature heat exchanger through a steam channel of the compressor, a high temperature heat exchanger is communicated through a high temperature heat regenerator, and an expander is communicated with a hybrid evaporator through a second high temperature evaporator and adjusted to be communicated with the hybrid evaporator through a low pressure steam channel of the expander, and the high temperature heat exchanger and the second high temperature evaporator form the combined cycle power plant.
11. A combined cycle power plant, wherein a high temperature heat regenerator is added in the combined cycle power plant of item 3, a second expander is communicated with the high temperature heat exchanger through a second high temperature heat exchanger and adjusted to be communicated with the high temperature heat exchanger through a second expander having a steam channel, the second high temperature heat exchanger and the high temperature heat regenerator, the compressor having a steam channel communicated with the high temperature heat exchanger is adjusted to be communicated with the high temperature heat exchanger through a compressor having a steam channel, the high temperature heat exchanger through a high temperature heat regenerator, and the expander having a low pressure steam channel is communicated with a hybrid evaporator through a second high temperature evaporator and a high temperature evaporator to be adjusted to be communicated with the hybrid evaporator through a low pressure steam channel, the high temperature heat regenerator, the second high temperature evaporator and the high temperature evaporator, thereby forming the combined cycle power plant.
12. A combined cycle power plant, wherein a high temperature heat regenerator is added in the combined cycle power plant of item 4, a second expander is communicated with the high temperature heat exchanger through a second high temperature heat exchanger and adjusted to be communicated with the high temperature heat exchanger through a second expander having a steam channel, the second high temperature heat exchanger and the high temperature heat regenerator are communicated, a compressor having a steam channel is communicated with the high temperature heat exchanger and adjusted to be communicated with the high temperature heat exchanger through a compressor having a steam channel, and the expander having a low pressure steam channel is communicated with a mixed evaporator through a high temperature evaporator and a second high temperature evaporator to be adjusted to be communicated with the mixed evaporator through a high temperature heat regenerator, a high temperature evaporator and a second high temperature evaporator, so as to form the combined cycle power plant.
13. A combined cycle power plant, which is characterized in that a high-temperature heat regenerator is added in the combined cycle power plant of the item 5, a steam channel of a second expander is communicated with the high-temperature heat exchanger through a second high-temperature heat exchanger and is adjusted to be communicated with the high-temperature heat exchanger through the second high-temperature heat exchanger and the high-temperature heat regenerator, a steam channel of a compressor is communicated with the high-temperature heat exchanger and is adjusted to be communicated with the high-temperature heat exchanger through the steam channel of the compressor, a low-pressure steam channel of the expander is communicated with a mixed evaporator through the second high-temperature heat exchanger and the high-temperature evaporator, and is adjusted to be communicated with the mixed evaporator through a low-pressure steam channel of the expander, the high-temperature heat exchanger, the second high-temperature heat exchanger and the high-temperature evaporator, thereby forming the combined cycle power plant.
14. A combined cycle power plant, which is characterized in that a high-temperature regenerator is added in the combined cycle power plant of the item 6, a steam channel of a second expander is communicated with the high-temperature heat exchanger through a second high-temperature heat exchanger and is adjusted to be communicated with the high-temperature heat exchanger through the second high-temperature heat exchanger and a steam channel of the second expander, a steam channel of a compressor is communicated with the high-temperature heat exchanger through the second high-temperature heat exchanger and the high-temperature regenerator, a steam channel of a compressor is communicated with the high-temperature heat exchanger through the high-temperature regenerator, a low-pressure steam channel of the expander is communicated with a mixed evaporator through the second high-temperature heat exchanger and the second high-temperature evaporator, and is adjusted to be communicated with the mixed evaporator through a low-pressure steam channel of the expander, the high-temperature regenerator, the second high-temperature heat exchanger and the second high-temperature evaporator, thereby forming the combined cycle power plant.
15. A combined cycle power plant, wherein a high temperature heat regenerator is added in the combined cycle power plant of item 7, a second expander is communicated with the high temperature heat exchanger through a second high temperature heat exchanger and adjusted to be communicated with the high temperature heat exchanger through a second expander having a steam channel, a second high temperature heat exchanger and the high temperature heat regenerator, a compressor is communicated with the high temperature heat exchanger through a steam channel, adjusted to be communicated with the high temperature heat exchanger through a high temperature heat regenerator, and an expander is communicated with a hybrid evaporator through a second high temperature heat exchanger, a second high temperature evaporator and the high temperature evaporator and adjusted to be communicated with the hybrid evaporator through a low pressure steam channel, and the high temperature heat exchanger, the second high temperature evaporator and the high temperature evaporator form the combined cycle power plant.
16. A combined cycle power plant, wherein a high temperature regenerator is added to the combined cycle power plant of item 8, a second expander having a steam channel is communicated with the high temperature heat exchanger through a second high temperature heat exchanger and adjusted such that the second expander having a steam channel is communicated with the high temperature heat exchanger through the second high temperature heat exchanger and the high temperature regenerator, a compressor having a steam channel is communicated with the high temperature heat exchanger and adjusted such that the compressor having a steam channel is communicated with the high temperature heat exchanger through the high temperature regenerator, and an expander having a low pressure steam channel is communicated with a hybrid evaporator through the second high temperature heat exchanger, the high temperature evaporator and the second high temperature evaporator and adjusted such that the expander having a low pressure steam channel is communicated with the hybrid evaporator through the high temperature regenerator, the second high temperature heat exchanger, the high temperature evaporator and the second high temperature evaporator, thereby forming the combined cycle power plant.
17. 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 1-16, 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.
18. A combined cycle power device is characterized in that in any one of the combined cycle power devices 1-17, a newly-added heat regenerator and a newly-added circulating pump are added, a condenser with a condensate pipeline communicated with a second high-temperature evaporator through a third circulating pump is adjusted to be communicated with the newly-added heat regenerator through the third 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 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 3 rd principle thermodynamic system diagram 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 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 principal 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.
FIG. 9 is a diagram of a 9 th principal thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
FIG. 10 is a 10 th principal thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 11 is a diagram of a principal 11 thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
FIG. 12 is a 12 th principle thermodynamic system diagram 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-third circulating pump, 8-high temperature heat exchanger, 9-second high temperature heat exchanger, 10-high temperature evaporator, 11-second high temperature evaporator, 12-condenser, 13-mixed evaporator, 14-high temperature heat regenerator, 15-low temperature heat regenerator, 16-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 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 is provided with a condensate pipeline which is communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 13 through a high-temperature evaporator 10, the mixing evaporator 13 is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor 3 and communicated with the condenser 12 through a third expander 4, the compressor 3 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 8, the condenser 12 is also provided with a steam channel which is communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 is further provided with a steam channel which is communicated with a second expander 2, the second expander 2 is further provided with a steam channel which is communicated with the high-temperature heat exchanger 8 through a second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 is further provided with a steam channel which is communicated with the expander 1, the condenser 12 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 11 through a third circulating pump 7, and then the second high-temperature evaporator 11 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 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11 are respectively communicated with the outside through a heat source medium channel, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the high-temperature evaporator 10, 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 8, absorbs heat, is heated, and flows through the third expander 4, the second path enters the condenser 12, releases heat and is condensed after being depressurized and worked; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the steam discharged by the high-temperature heat exchanger 8 flows through the expansion machine 1 to reduce pressure and do work; low-pressure steam discharged by the expander 1 flows through the high-temperature evaporator 10 to release heat and reduce temperature, and then enters the mixing evaporator 13 to release heat and reduce temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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 second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 has a condensate pipeline communicated with the mixing evaporator 13 through the circulating pump 5, the expander 1 has a low-pressure steam passage communicated with the mixing evaporator 13 through the second high-temperature evaporator 11, the mixing evaporator 13 also has a low-pressure steam passage respectively communicated with the compressor 3 directly and communicated with the condenser 12 through the third expander 4, the compressor 3 also has a steam passage communicated with the high-temperature heat exchanger 8, the condenser 12 also has a condensate pipeline communicated with the high-temperature evaporator 10 through the second circulating pump 6, then the high-temperature evaporator 10 has a steam passage communicated with the second expander 2, the second expander 2 also has a steam passage communicated with the high-temperature heat exchanger 8 through the second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 also has a steam passage communicated with the expander 1, the condenser 12 also has a condensate pipeline communicated with the second high-temperature evaporator 11 through the third circulating pump 7, then the second high-temperature evaporator 11 has a steam passage communicated with the expander 1 through the intermediate steam inlet passage; the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11 are also respectively communicated with the outside through heat source medium channels, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the second high-temperature evaporator 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, heated and enters the high-temperature heat exchanger 8 to absorb heat and heat, and the second path flows through the third expander 4, is depressurized and does work, then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the steam discharged by the high-temperature heat exchanger 8 flows through the expansion machine 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 passes through the second high-temperature evaporator 11 to release heat and reduce the temperature, and then enters the mixing evaporator 13 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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 second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 is provided with a condensate pipeline which is communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 13 through a second high-temperature evaporator 11 and a high-temperature evaporator 10, the mixing evaporator 13 is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor 3 and communicated with the condenser 12 through a third expander 4, the compressor 3 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 8, the condenser 12 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 is 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 8 through a second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 is also provided with a steam channel which is communicated with the expander 1, the condenser 12 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 11 through a third circulating pump 7, and then the second high-temperature evaporator 11 is provided with a steam channel which is communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11 are also respectively communicated with the outside through heat source medium channels, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the high-temperature evaporator 10, 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 8, absorbs heat and is heated, the second path flows through the third expander 4, is depressurized and does work, and then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the steam discharged by the high-temperature heat exchanger 8 flows through the expansion machine 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 flows through the second high-temperature evaporator 11 and the high-temperature evaporator 10 to gradually release heat and cool, and then enters the mixing evaporator 13 to release heat and cool; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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 second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 has a condensate pipeline communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 has a low-pressure steam channel communicated with the mixing evaporator 13 through a high-temperature evaporator 10 and a second high-temperature evaporator 11, the mixing evaporator 13 also has a low-pressure steam channel which is respectively communicated with the compressor 3 directly and communicated with the condenser 12 through a third expander 4, the compressor 3 also has a steam channel communicated with a high-temperature heat exchanger 8, the condenser 12 also has a condensate pipeline communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 has a steam channel communicated with a second expander 2, the second expander 2 also has a steam channel communicated with the high-temperature heat exchanger 8 through a second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 also has a steam channel communicated with the expander 1, the condenser 12 also has a condensate pipeline communicated with the second high-temperature evaporator 11 through a third circulating pump 7, then the second high-temperature evaporator 11 has a steam channel communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9 and the second high-temperature evaporator 11 are also respectively communicated with the outside through heat source medium channels, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the second high-temperature evaporator 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, heated and enters the high-temperature heat exchanger 8 to absorb heat and heat, and the second path flows through the third expander 4, is depressurized and does work, then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure and works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the steam discharged by the high-temperature heat exchanger 8 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 evaporator 10 and the second high-temperature evaporator 11 to gradually release heat and cool, and then enters the mixing evaporator 13 to release heat and cool; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9 and the second high-temperature evaporator 11, the cooling medium takes low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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 second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 has a condensate pipeline communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 has a low-pressure steam channel communicated with the mixing evaporator 13 through a second high-temperature heat exchanger 9 and a high-temperature evaporator 10, the mixing evaporator 13 also has a low-pressure steam channel which is respectively communicated with the compressor 3 directly and communicated with the condenser 12 through a third expander 4, the compressor 3 also has a steam channel communicated with a high-temperature heat exchanger 8, the condenser 12 also has a condensate pipeline communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 has a steam channel communicated with a second expander 2, the second expander 2 also has a steam channel communicated with the high-temperature heat exchanger 8 through the second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 also has a steam channel communicated with the expander 1, the condenser 12 also has a condensate pipeline communicated with the second high-temperature evaporator 11 through a third circulating pump 7, then the second high-temperature evaporator 11 has a steam channel communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 8, the high-temperature evaporator 10 and the second high-temperature evaporator 11 are also respectively communicated with the outside through heat source medium channels, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the high-temperature evaporator 10, 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 8, absorbs heat and is heated, the second path flows through the third expander 4, is depressurized and does work, and then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the steam discharged by the high-temperature heat exchanger 8 flows through the expansion machine 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 flows through the second high-temperature heat exchanger 9 and the high-temperature evaporator 10 to gradually release heat and reduce the temperature, and then enters the mixing evaporator 13 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 and the outside to form a combined cycle power device.
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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 is provided with a condensate pipeline which is communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 is provided with a low-pressure steam channel which is communicated with the mixing evaporator 13 through a second high-temperature heat exchanger 9 and a second high-temperature evaporator 11, the mixing evaporator 13 is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor 3 and communicated with the condenser 12 through a third expander 4, the compressor 3 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 8, the condenser 12 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 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 8 through the second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 is also provided with a steam channel which is communicated with the expander 1, the condenser 12 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 11 through a third circulating pump 7, and then the second high-temperature evaporator 11 is provided with a steam channel which is communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 8, the high-temperature evaporator 10 and the second high-temperature evaporator 11 are also respectively communicated with the outside through heat source medium channels, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the second high-temperature evaporator 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, heated and enters the high-temperature heat exchanger 8 to absorb heat and heat, and the second path flows through the third expander 4, is depressurized and does work, then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; a third path of condensate of the condenser 12 is boosted by a third circulating pump 7 and enters a second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expander 1 through a middle steam inlet channel to reduce pressure and do work, and steam discharged by the high-temperature heat exchanger 8 flows through the expander 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 passes through the second high-temperature heat exchanger 9 and the second high-temperature evaporator 11 to gradually release heat and reduce the temperature, and then enters the mixing evaporator 13 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 is provided with a condensate pipeline which is communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 is provided with a low-pressure steam channel which is communicated with the compressor 3 through a second high-temperature heat exchanger 9, a second high-temperature evaporator 11 and a high-temperature evaporator 10 and is communicated with the mixing evaporator 13, the mixing evaporator 13 is also provided with a low-pressure steam channel which is respectively communicated with the compressor 3 and the condenser 12 through a third expander 4, the compressor 3 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 8, the condenser 12 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 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 8 through the second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 is also provided with a steam channel which is communicated with the expander 1, the condenser 12 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 11 through the third circulating pump 7, and then the second high-temperature evaporator 11 is provided with a steam channel which is communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 8 and the second high-temperature evaporator 11 are also respectively communicated with the outside through a heat source medium channel, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the high-temperature evaporator 10, 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 8, absorbs heat and is heated, the second path flows through the third expander 4, is depressurized and does work, and then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; a third path of condensate of the condenser 12 is boosted by a third circulating pump 7 and enters a second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expander 1 through a middle steam inlet channel to reduce pressure and do work, and steam discharged by the high-temperature heat exchanger 8 flows through the expander 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 passes through the second high-temperature heat exchanger 9, the second high-temperature evaporator 11 and the high-temperature evaporator 10 to gradually release heat and reduce the temperature, and then enters the mixing evaporator 13 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a second circulating pump, a third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser 12 is provided with a condensate pipeline which is communicated with a mixing evaporator 13 through a circulating pump 5, the expander 1 is provided with a low-pressure steam channel which is communicated with the compressor 3 through a second high-temperature heat exchanger 9, a high-temperature evaporator 10 and a second high-temperature evaporator 11 and is communicated with the mixing evaporator 13, the mixing evaporator 13 is also provided with a low-pressure steam channel which is respectively communicated with the compressor 3 and the condenser 12 through a third expander 4, the compressor 3 is also provided with a steam channel which is communicated with a high-temperature heat exchanger 8, the condenser 12 is also provided with a condensate pipeline which is communicated with the high-temperature evaporator 10 through a second circulating pump 6, then the high-temperature evaporator 10 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 8 through the second high-temperature heat exchanger 9, the high-temperature heat exchanger 8 is also provided with a steam channel which is communicated with the expander 1, the condenser 12 is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator 11 through the third circulating pump 7, and then the second high-temperature evaporator 11 is provided with a steam channel which is communicated with the expander 1 through an intermediate steam inlet channel; the high-temperature heat exchanger 8 and the second high-temperature evaporator 11 are also respectively communicated with the outside through a heat source medium channel, the condenser 12 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 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the second high-temperature evaporator 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, heated and enters the high-temperature heat exchanger 8 to absorb heat and heat, and the second path flows through the third expander 4, is depressurized and does work, then enters the condenser 12, releases heat and is condensed; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the steam discharged by the high-temperature heat exchanger 8 flows through the expansion machine 1 to reduce pressure and do work; the low-pressure steam discharged by the expander 1 passes through the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11 to gradually release heat and reduce the temperature, and then enters the mixing evaporator 13 to release heat and reduce the temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 9 is implemented as follows:
(1) Structurally, in the combined cycle power plant shown in fig. 1, a high temperature regenerator is added, a steam channel of the second expander 2 is communicated with the high temperature heat exchanger 8 through the second high temperature heat exchanger 9 and adjusted to be that the second expander 2 has a steam channel communicated with the high temperature heat exchanger 8 through the second high temperature heat exchanger 9 and the high temperature regenerator 14, a steam channel of the compressor 3 is communicated with the high temperature heat exchanger 8 and adjusted to be that the compressor 3 has a steam channel communicated with the high temperature heat exchanger 8 through the high temperature regenerator 14, and a low pressure steam channel of the expander 1 is communicated with the hybrid evaporator 13 through the high temperature evaporator 10 and adjusted to be that the expander 1 has a low pressure steam channel communicated with the hybrid evaporator 13 through the high temperature regenerator 14 and the high temperature evaporator 10.
(2) Compared with the combined cycle power plant shown in fig. 1, the difference is that the steam discharged from the second expander 2 passes through the second high-temperature heat exchanger 9 and the high-temperature regenerator 14 to gradually absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 8 to absorb heat and raise the temperature; steam discharged by the compressor 3 flows through the high-temperature heat regenerator 14 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 8 to absorb heat and raise the temperature; the low-pressure steam discharged by the expander 1 flows through the high-temperature heat regenerator 14 and the high-temperature evaporator 10 to gradually release heat and cool, and then enters the hybrid evaporator 10 to release heat and cool; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 10 is implemented as follows:
(1) Structurally, in the combined cycle power plant shown in fig. 5, a high temperature regenerator is added, a steam passage of the second expander 2 is communicated with the high temperature heat exchanger 8 through the second high temperature heat exchanger 9 and is adjusted so that the second expander 2 has a steam passage communicated with the high temperature heat exchanger 8 through the second high temperature heat exchanger 9 and the high temperature regenerator 14, a steam passage of the compressor 3 is communicated with the high temperature heat exchanger 8 and is adjusted so that the compressor 3 has a steam passage communicated with the high temperature heat exchanger 8 through the high temperature regenerator 14, and a low pressure steam passage of the expander 1 is communicated with the hybrid evaporator 13 through the second high temperature heat exchanger 9 and the high temperature evaporator 10 and is adjusted so that the expander 1 has a low pressure steam passage communicated with the hybrid evaporator 13 through the high temperature regenerator 14, the second high temperature heat exchanger 9 and the high temperature evaporator 10.
(2) Compared with the combined cycle power plant shown in fig. 5, the difference is that the steam discharged from the second expander 2 gradually absorbs heat and increases temperature through the second high-temperature heat exchanger 9 and the high-temperature regenerator 14, and then enters the high-temperature heat exchanger 8 to absorb heat and increase temperature; steam discharged by the compressor 3 flows through the high-temperature heat regenerator 14 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 8 to absorb heat and raise the temperature; the low-pressure steam discharged by the expander 1 flows through the high-temperature heat regenerator 14, the second high-temperature heat exchanger 9 and the high-temperature evaporator 10 to gradually release heat and cool, and then enters the hybrid evaporator 10 to release heat and cool; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 and the outside to form a combined cycle power device.
The combined cycle power plant shown in FIG. 11 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 12 is communicated with a high-temperature evaporator 10 through a second circulating pump 6, the condensate pipeline of the condenser 12 is communicated with a low-temperature heat regenerator 15 through the second circulating pump 6, a middle steam extraction channel of a compressor 3 is additionally arranged and communicated with the low-temperature heat regenerator 15, and the low-temperature heat regenerator 15 is communicated with the high-temperature evaporator 10 through a condensate pipeline of the fourth circulating pump 16.
(2) In the process, the first path of condensate of the condenser 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the high-temperature evaporator 10, 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 to be boosted and heated, and the second path flows through the third expander 4 to be decompressed and does work and then enters the condenser 12 to release heat and be condensed; the low-pressure steam entering the compressor 3 is subjected to pressure rise and temperature rise to a certain degree and then divided into two paths, wherein the first path enters the low-temperature heat regenerator 15 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 3 enters the high-temperature heat exchanger 8 to absorb heat and raise the temperature; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the low-temperature heat regenerator 15, 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 15 is boosted by a third circulating pump 16 and then enters a high-temperature evaporator 10 to absorb heat, raise temperature, vaporize and overheat, flows through a second expander 2 to reduce pressure and do work, flows through a second high-temperature heat exchanger 9 to absorb heat, raise temperature, and then enters a high-temperature heat exchanger 8 to absorb heat and raise temperature; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 and enters the second high-temperature evaporator 11 to absorb heat, raise temperature, vaporize and overheat, then enters the expansion machine 1 through the middle steam inlet channel to reduce pressure and do work, and the entering flow discharged by the high-temperature heat exchanger 8 flows through the expansion machine 1 to reduce pressure and do work; low-pressure steam discharged by the expander 1 flows through the high-temperature evaporator 10 to release heat and reduce temperature, and then enters the mixing evaporator 13 to release heat and reduce temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes the low-temperature heat load away through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 and the outside to form a combined cycle power device.
The combined cycle power plant shown in fig. 12 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 12 is communicated with a second high-temperature evaporator 11 through a third circulating pump 7 and adjusted to be that the condenser 12 is communicated with the newly added heat regenerator a through the third circulating pump 7, a middle steam extraction channel of a compressor 3 is additionally arranged to be communicated with the newly added heat regenerator a, and the newly added heat regenerator a is communicated with the second high-temperature evaporator 11 through a newly added circulating pump B.
(2) In the flow, the first path of condensate of the condenser 12 is boosted by the circulating pump 5 and enters the mixing evaporator 13 to be mixed with the low-pressure steam from the high-temperature evaporator 10, the mixture absorbs heat and is heated and vaporized into saturated or superheated steam, then the mixture is divided into two paths, the first path enters the compressor 3 to be boosted and heated, the second path flows through the third expander 4 to be decompressed and work, and then enters the condenser 12 to release heat and be condensed; the low-pressure steam entering the compressor 3 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 3 enters the high-temperature heat exchanger 8 to absorb heat and raise the temperature; the second path of condensate of the condenser 12 is boosted by the second circulating pump 6 and enters the high-temperature evaporator 10, absorbs heat, is heated, vaporized and overheated, flows through the second expander 2, is reduced in pressure, works, flows through the second high-temperature heat exchanger 9, absorbs heat, is heated, and then enters the high-temperature heat exchanger 8 to absorb heat and be heated; the third path of condensate of the condenser 12 is boosted by the third circulating pump 7 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 exchanger A is boosted by a newly-added circulating pump B and then enters a second high-temperature evaporator 11 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, and steam discharged by a high-temperature heat exchanger 8 enters the expander 1 to reduce pressure and do work; low-pressure steam discharged by the expander 1 flows through the high-temperature evaporator 10 to release heat and reduce temperature, and then enters the mixing evaporator 13 to release heat and reduce temperature; the heat source medium provides driving heat load through the high-temperature heat exchanger 8, the second high-temperature heat exchanger 9, the high-temperature evaporator 10 and the second high-temperature evaporator 11, the cooling medium takes away low-temperature heat load through the condenser 12, and the expander 1, the second expander 2 and the third expander 4 provide power for the compressor 3 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 of the device 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 of the device is greatly improved.
(4) The bottom circulation is carried out in a grading way, which is beneficial to reducing the irreversible loss of temperature difference and providing the heat efficiency of the device.
(5) The equipment is shared, the heat absorption process of bottom circulation, namely Rankine cycle, is increased, and the heat efficiency of the device is improved.
(6) 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.
(7) The common high-temperature expansion machine reduces the number of core equipment, and is beneficial to reducing the system investment and improving the thermal efficiency of the device.
(8) 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.
(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; according to the actual condition, the working in the subcritical, critical, supercritical or ultra supercritical state can be selected.

Claims (18)

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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with the mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a high-temperature evaporator (10), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a steam channel which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), the high-temperature evaporator (10) 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 (8) through a second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is also provided with a steam channel which is communicated with the expander (1), and the condenser (12) is also provided with a condensate pipeline which is communicated with a middle steam inlet channel (11) through a third circulating pump (7) and the second high-temperature evaporator (11); the high-temperature heat exchanger (8), the second high-temperature heat exchanger (9) and the second high-temperature evaporator (11) are also respectively provided with a heat source medium channel communicated with the outside, the high-temperature evaporator (10) or a heat source medium channel is also communicated with the outside, the condenser (12) or a cooling medium channel is also communicated with the outside, the hybrid evaporator (13) or a heat source medium channel is also 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), the second circulating pump (6) and the third circulating pump (7) and transmits power.
2. 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with the mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a second high-temperature evaporator (11), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), then the high-temperature evaporator (10) 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 (8) through a second high-temperature heat exchanger (9), then the high-temperature heat exchanger (8) is also provided with a steam channel which is communicated with the expander (1), and the condenser (12) is also provided with a condensate pipeline which is communicated with a middle steam inlet channel of the second high-temperature evaporator (11) through a third circulating pump (7); the high-temperature heat exchanger (8), the second high-temperature heat exchanger (9), the high-temperature evaporator (10) and the second high-temperature evaporator (11) are also respectively communicated with the outside through a heat source medium channel, the condenser (12) is also communicated with the outside through a cooling medium channel, the hybrid evaporator (13) 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), the second circulating pump (6) and the third circulating pump (7) 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with the mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a second high-temperature evaporator (11) and a high-temperature evaporator (10), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), then the high-temperature evaporator (10) is further provided with a steam channel which is communicated with the second expander (2), the second expander (2) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is further provided with a steam channel which is communicated with the expander (1), and the condenser (12) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (11) through a middle steam inlet channel which is communicated with the second high-temperature evaporator (11) through a third circulating pump (7); the high-temperature heat exchanger (8), the second high-temperature heat exchanger (9) and the second high-temperature evaporator (11) are also respectively provided with a heat source medium channel communicated with the outside, the high-temperature evaporator (10) or a heat source medium channel is also communicated with the outside, the condenser (12) or a cooling medium channel is also communicated with the outside, the hybrid evaporator (13) or a heat source medium channel is also 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), the second circulating pump (6) and the third circulating pump (7) and transmits 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with the mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a high-temperature evaporator (10) and a second high-temperature evaporator (11), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), then the high-temperature evaporator (10) is further provided with a steam channel which is communicated with the second expander (2), the second expander (2) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is further provided with a steam channel which is communicated with the expander (1), and the condenser (12) is also provided with a condensate pipeline which is communicated with the second high-temperature evaporator (11) through a middle steam inlet channel which is communicated with the second high-temperature evaporator (11) through the third circulating pump (7); the high-temperature heat exchanger (8), the second high-temperature heat exchanger (9) and the second high-temperature evaporator (11) are also respectively provided with a heat source medium channel communicated with the outside, the high-temperature evaporator (10) or a heat source medium channel is also communicated with the outside, the condenser (12) or a cooling medium channel is also communicated with the outside, the hybrid evaporator (13) or a heat source medium channel is also 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), the second circulating pump (6) and the third circulating pump (7) and transmits 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with the mixing evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixing evaporator (13) through a second high-temperature heat exchanger (9) and a high-temperature evaporator (10), the mixing evaporator (13) is also provided with a low-pressure steam channel which is respectively and directly communicated with the compressor (3) and communicated with the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline, a steam channel of the high-temperature evaporator (10) is communicated with the second expander (2) after the condensate pipeline is communicated with the high-temperature evaporator (10) through the second circulating pump (6), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is also provided with a steam channel which is communicated with the expander (1), the condenser (12) is also provided with a condensate pipeline, a steam channel of the second high-temperature evaporator (11) is communicated with the second high-temperature evaporator (11) through the third circulating pump (7), and the steam channel of the second high-temperature evaporator (11) is communicated with the expander (1) through the middle steam inlet channel; the high-temperature heat exchanger (8) and the second high-temperature evaporator (11) are also respectively provided with a heat source medium channel communicated with the outside, the second high-temperature heat exchanger (9) or a heat source medium channel is communicated with the outside, the high-temperature evaporator (10) or a heat source medium channel is communicated with the outside, the condenser (12) is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator (13) or a 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), the second circulating pump (6) and the third circulating pump (7) 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with a mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a second high-temperature heat exchanger (9) and a second high-temperature evaporator (11), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively communicated with the compressor (3) and the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), then the high-temperature evaporator (10) 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 (8) through the second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is also provided with a steam channel which is communicated with the expander (1), and the condenser (12) is also provided with a condensate pipeline which is communicated with a middle steam inlet channel of the second high-temperature evaporator (11) through the third circulating pump (7); the high-temperature heat exchanger (8), the high-temperature evaporator (10) and the second high-temperature evaporator (11) are also respectively communicated with the outside through a heat source medium channel, the second high-temperature heat exchanger (9) or a heat source medium channel is communicated with the outside, the condenser (12) or a cooling medium channel is communicated with the outside, the hybrid evaporator (13) or a 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), the second circulating pump (6) and the third circulating pump (7) and transmits power.
7. 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with a mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a second high-temperature heat exchanger (9), a second high-temperature evaporator (11) and a high-temperature evaporator (10), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively communicated with the compressor (3) and the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), then the high-temperature evaporator (10) is further provided with a steam channel which is communicated with the second expander (2), the second expander (2) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is further provided with a steam channel which is communicated with the expander (1), and the condenser (12) is further provided with a condensate pipeline which is communicated with a middle steam inlet channel of the second high-temperature evaporator (11) through the third high-temperature evaporator (7); the high-temperature heat exchanger (8) and the second high-temperature evaporator (11) are also respectively provided with a heat source medium channel communicated with the outside, the second high-temperature heat exchanger (9) or a heat source medium channel is communicated with the outside, the high-temperature evaporator (10) or a heat source medium channel is communicated with the outside, the condenser (12) is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator (13) or a 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), the second circulating pump (6) and the third circulating pump (7) and transmits power.
8. 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 third circulating pump, a high-temperature heat exchanger, a second high-temperature heat exchanger, a high-temperature evaporator, a second high-temperature evaporator, a condenser and a mixed evaporator; the condenser (12) is provided with a condensate pipeline which is communicated with a mixed evaporator (13) through a circulating pump (5), the expander (1) is provided with a low-pressure steam channel which is communicated with the mixed evaporator (13) through a second high-temperature heat exchanger (9), a high-temperature evaporator (10) and a second high-temperature evaporator (11), the mixed evaporator (13) is also provided with a low-pressure steam channel which is respectively communicated with the compressor (3) and the condenser (12) through a third expander (4), the compressor (3) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (8), the condenser (12) is also provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through a second circulating pump (6), then the high-temperature evaporator (10) is further provided with a steam channel which is communicated with the second expander (2), the second expander (2) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9), the high-temperature heat exchanger (8) is further provided with a steam channel which is communicated with the expander (1), and the condenser (12) is further provided with a condensate pipeline which is communicated with a middle steam inlet channel of the second high-temperature evaporator (11) through the third high-temperature steam circulating pump (7); the high-temperature heat exchanger (8) and the second high-temperature evaporator (11) are also respectively provided with a heat source medium channel communicated with the outside, the second high-temperature heat exchanger (9) or a heat source medium channel is communicated with the outside, the high-temperature evaporator (10) or a heat source medium channel is communicated with the outside, the condenser (12) is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator (13) or a 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), the second circulating pump (6) and the third circulating pump (7) and transmits power.
9. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 1, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a steam channel of a low-pressure steam channel of the expander (1) is communicated with a hybrid evaporator (13) through the high-temperature evaporator (10) and is adjusted to be communicated with the hybrid evaporator (13) through the low-pressure steam channel of the expander (1) and the high-temperature regenerator (14) and the high-temperature evaporator (10), and the combined cycle power device is formed.
10. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 2, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a hybrid evaporator (13) through the second high-temperature evaporator (11) and is adjusted to be communicated with the hybrid evaporator (13) through the high-temperature regenerator (14) and the second high-temperature evaporator (11), and the combined cycle power device is formed.
11. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 3, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a hybrid evaporator (13) through the second high-temperature evaporator (11) and the high-temperature evaporator (10), and is adjusted to be communicated with the hybrid evaporator (13) through the high-temperature regenerator (14), the second high-temperature evaporator (11) and the high-temperature evaporator (10), and the combined cycle power device is formed.
12. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 4, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a hybrid evaporator (13) through a high-temperature evaporator (10) and a second high-temperature evaporator (11) and is adjusted to be communicated with the expander (1) through the high-temperature regenerator (14), the high-temperature evaporator (10) and the second high-temperature evaporator (11) and is communicated with the hybrid evaporator (13), and the combined cycle power device is formed.
13. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 5, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a hybrid evaporator (13) through the second high-temperature heat exchanger (9) and the high-temperature evaporator (10) and is adjusted to be communicated with the hybrid evaporator (13) through the high-temperature regenerator (14), the second high-temperature heat exchanger (9) and the high-temperature evaporator (10), and the hybrid evaporator (13) are communicated with each other, so as to form the combined cycle power device.
14. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 6, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a hybrid evaporator (13) through the second high-temperature heat exchanger (9) and the second high-temperature evaporator (11), and is adjusted to be communicated with the hybrid evaporator (13) through the low-pressure steam channel of the expander (1) through the high-temperature regenerator (14), the second high-temperature heat exchanger (9) and the second high-temperature evaporator (11), and the hybrid evaporator (13) are formed into the combined cycle power device.
15. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device of claim 7, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a mixed evaporator (13) through the second high-temperature heat exchanger (9), the second high-temperature evaporator (11) and the high-temperature evaporator (10) and is adjusted to be communicated with the low-pressure steam channel of the expander (1) through the high-temperature regenerator (14), the second high-temperature heat exchanger (9), the second high-temperature evaporator (11) and the high-temperature evaporator (10), and the mixed evaporator (13) are communicated to form the combined cycle power device.
16. A combined cycle power device is characterized in that a high-temperature regenerator is added in the combined cycle power device according to claim 8, a steam channel of a second expander (2) is communicated with a high-temperature heat exchanger (8) through a second high-temperature heat exchanger (9) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the second high-temperature heat exchanger (9) and the high-temperature regenerator (14), a steam channel of a compressor (3) is communicated with the high-temperature heat exchanger (8) and is adjusted to be communicated with the high-temperature heat exchanger (8) through the high-temperature regenerator (14), a low-pressure steam channel of an expander (1) is communicated with a mixed evaporator (13) through the second high-temperature heat exchanger (9), the high-temperature evaporator (10) and the second high-temperature evaporator (11) and is adjusted to be communicated with the low-pressure steam channel of the expander (1) through the high-temperature regenerator (14), the second high-temperature heat exchanger (9), the high-temperature evaporator (10) and the second high-temperature evaporator (11), so as to form the combined cycle power device.
17. 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 16, a condenser (12) is provided with a condensate pipeline which is communicated with a high-temperature evaporator (10) through a second circulating pump (6) and is adjusted to be that the condenser (12) is provided with a condensate pipeline which is communicated with a low-temperature heat regenerator (15) through the second circulating pump (6), a middle steam extraction channel is additionally arranged on a compressor (3) and is communicated with the low-temperature heat regenerator (15), and the low-temperature heat regenerator (15) is provided with a condensate pipeline which is communicated with the high-temperature evaporator (10) through the fourth circulating pump (16) to form the combined cycle power device.
18. 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 1-17, a condenser (12) is communicated with a second high-temperature evaporator (11) through a third circulating pump (7) and adjusted to be a condenser (12) which is communicated with a newly added heat regenerator (A) through a third circulating pump (7), a middle steam extraction channel is additionally arranged on a compressor (3) 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 (11) through a newly added circulating pump (B) to form the combined cycle power device.
CN202010497678.0A 2019-05-30 2020-05-29 Combined cycle power plant Pending CN115199357A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2019104946246 2019-05-30
CN201910494624 2019-05-30

Publications (1)

Publication Number Publication Date
CN115199357A true CN115199357A (en) 2022-10-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010497678.0A Pending CN115199357A (en) 2019-05-30 2020-05-29 Combined cycle power plant

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Country Link
CN (1) CN115199357A (en)

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