CN114370308A - Single-working medium combined cycle power plant - Google Patents

Single-working medium combined cycle power plant Download PDF

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Publication number
CN114370308A
CN114370308A CN202111471467.0A CN202111471467A CN114370308A CN 114370308 A CN114370308 A CN 114370308A CN 202111471467 A CN202111471467 A CN 202111471467A CN 114370308 A CN114370308 A CN 114370308A
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China
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communicated
expander
temperature heat
compressor
heat exchanger
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CN202111471467.0A
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李鸿瑞
李华玉
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • 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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/02—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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours

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

Abstract

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

Description

Single-working medium 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. 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 the single-working-medium combined cycle power plant which has high heat efficiency and safety, is suitable for a high-temperature heat source or a variable-temperature heat source and can deal with various fuels.
The invention content is as follows:
the invention mainly aims to provide a single-working-medium combined cycle power device, and the specific invention contents are explained in the following sections:
1. the single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser and an evaporator; the condenser is provided with a condensate pipeline, a steam channel of the evaporator is communicated with a second expander after the condensate pipeline is communicated with the evaporator through a circulating pump, the second expander is also provided with a steam channel which is communicated with a high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator, a low-pressure steam channel of the evaporator is communicated with the compressor and a third expander respectively, and the third expander is also provided with a low-pressure steam channel which is communicated with the condenser; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the 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 single-working-medium combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
2. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat supplier; the condenser is provided with a condensate pipeline, a steam channel of the evaporator is communicated with a second expander after the condensate pipeline is communicated with the evaporator through a circulating pump, the second expander is also provided with a steam channel which is communicated with a high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with a heat supply device, then the heat supply device is provided with a low-pressure steam channel which is respectively communicated with the compressor and a third expander, and the third expander is also provided with a low-pressure steam channel which is communicated with the condenser; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the evaporator is also provided with a heat source medium channel communicated with the outside, the heat supply device is also provided with a heated medium channel communicated with the outside, and the expander is connected with the compressor and transmits power to form a single-working-medium combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
3. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat regenerator; the condenser is provided with a condensate pipeline, a circulating pump and a heat regenerator are communicated with the evaporator, then a steam channel of the evaporator is communicated with a second expander, the second expander is also provided with a steam channel communicated with a high-temperature heat exchanger, the compressor is provided with a steam channel communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel communicated with the expander, the expander is also provided with a low-pressure steam channel communicated with the evaporator and then divided into two paths, namely, the first path is communicated with the compressor, and the second path is communicated with a third expander through the heat regenerator; the third expander is also provided with a low-pressure steam channel communicated with the condenser, the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the evaporator or the heat source medium channel is communicated with the outside, the heat regenerator 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 simplex combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
4. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat regenerator; the condenser is provided with a condensate pipeline, a circulating pump and a heat regenerator are communicated with the evaporator, then a steam channel of the evaporator is communicated with a second expander, the second expander is also provided with a steam channel communicated with a high-temperature heat exchanger, the compressor is provided with a steam channel communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel communicated with the expander, the expander is also provided with a low-pressure steam channel communicated with the evaporator and then divided into two paths, wherein the first path is communicated with the compressor through the heat regenerator, and the second path is directly communicated with a third expander; the third expander is also provided with a low-pressure steam channel communicated with the condenser, the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the evaporator or the heat source medium channel is communicated with the outside, the heat regenerator 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 simplex combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
5. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature heat regenerator; the condenser is provided with a condensate pipeline, a steam channel of the evaporator is communicated with a second expander after the condensate pipeline is communicated with the evaporator through a circulating pump, the second expander is also provided with a steam channel which is communicated with a high-temperature heat exchanger through a high-temperature heat regenerator, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the high-temperature heat regenerator, the high-temperature heat regenerator is also provided with a low-pressure steam channel of the evaporator after the low-pressure steam channel is communicated with the evaporator, the low-pressure steam channel of the evaporator is respectively communicated with the compressor and a third expander, and the low-pressure steam channel of the third expander is also communicated with the condenser; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the 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 single-working-medium combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
6. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator, a heat supply device and a high-temperature heat regenerator; the condenser is provided with a condensate pipeline, a steam channel of the evaporator is communicated with a second expander after the condensate pipeline is communicated with the evaporator through a circulating pump, the second expander is also provided with a steam channel which is communicated with a high-temperature heat exchanger through a high-temperature heat regenerator, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the high-temperature heat regenerator, the high-temperature heat regenerator is also provided with a low-pressure steam channel which is communicated with a heat supplier, then the heat supplier is provided with a low-pressure steam channel which is respectively communicated with the compressor and a third expander, and the third expander is also provided with a low-pressure steam channel which is communicated with the condenser; the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the evaporator is also provided with a heat source medium channel communicated with the outside, the heat supply device is also provided with a heated medium channel communicated with the outside, and the expander is connected with the compressor and transmits power to form a single-working-medium combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
7. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator, a heat regenerator and a high-temperature heat regenerator; the condenser is provided with a condensate pipeline, a circulating pump, a heat regenerator and a steam channel of the evaporator are communicated with the evaporator, the steam channel of the evaporator is communicated with a second expander, the steam channel of the second expander is communicated with a high-temperature heat exchanger through a high-temperature heat regenerator, the steam channel of the compressor is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, the steam channel of the high-temperature heat exchanger is communicated with the expander, the low-pressure steam channel of the expander is communicated with the high-temperature heat regenerator, the high-temperature heat regenerator is also divided into two paths after the low-pressure steam channel of the high-temperature heat regenerator is communicated with the evaporator, the first path is communicated with the compressor, and the second path is communicated with a third expander through the heat regenerator; the third expander is also provided with a low-pressure steam channel communicated with the condenser, the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the evaporator or the heat source medium channel is communicated with the outside, the heat regenerator 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 simplex combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
8. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator, a heat regenerator and a high-temperature heat regenerator; the condenser is provided with a condensate pipeline, a circulating pump, a heat regenerator and a steam channel, wherein the condensate pipeline is communicated with the evaporator, the steam channel of the evaporator is communicated with a second expander, the steam channel of the second expander is communicated with a high-temperature heat exchanger through a high-temperature heat regenerator, the steam channel of the compressor is communicated with the high-temperature heat exchanger through the high-temperature heat regenerator, the steam channel of the high-temperature heat exchanger is communicated with the expander, the low-pressure steam channel of the expander is communicated with the high-temperature heat regenerator, the high-temperature heat regenerator is also divided into two paths after being communicated with the evaporator, the first path is communicated with the compressor through the heat regenerator, and the second path is directly communicated with a third expander; the third expander is also provided with a low-pressure steam channel communicated with the condenser, the high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the evaporator or the heat source medium channel is communicated with the outside, the heat regenerator 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 simplex combined cycle power device; wherein, or the expander is connected with the compressor and the circulating pump and transmits power.
9. A single-working medium combined cycle power device is characterized in that a low-temperature heat regenerator and a second circulating pump are added in any one of the single-working medium combined cycle power devices 1-2 and 5-6, a condenser with a condensate pipeline communicated with an evaporator through the circulating pump is adjusted to be communicated with the low-temperature heat regenerator through the circulating pump, a middle steam extraction channel is additionally arranged on a compressor to be communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the evaporator through the second circulating pump with the condensate pipeline, so that the single-working medium combined cycle power device is formed.
10. A single-working medium combined cycle power device is characterized in that a low-temperature heat regenerator and a second circulating pump are added in any one of the single-working medium combined cycle power devices of items 3-4 and 7-8, a condenser with a condensate pipeline communicated with an evaporator through the circulating pump and the heat regenerator is adjusted to be a condenser with a condensate pipeline communicated with the low-temperature heat regenerator through the circulating pump and the heat regenerator, a middle steam extraction channel is additionally arranged on a compressor to be communicated with the low-temperature heat regenerator, and the low-temperature heat regenerator is communicated with the evaporator through the second circulating pump with the condensate pipeline, so that the single-working medium combined cycle power device is formed.
11. A single-working-medium combined cycle power device is characterized in that a second compressor and a second high-temperature heat exchanger are added in any one of the single-working-medium combined cycle power devices 1-10, a high-temperature heat exchanger is provided with a steam channel which is communicated with an expander and is adjusted to be provided with a steam channel which is communicated with the expander through the second compressor and the second high-temperature heat exchanger, the second high-temperature heat exchanger is also provided with a heat source medium channel which is communicated with the outside, and the expander is connected with the second compressor and transmits power to form the single-working-medium combined cycle power device.
12. A single working medium combined cycle power device is characterized in that a fourth expander and a second high-temperature heat exchanger are added in any one of the single working medium combined cycle power devices 1-10, a high-temperature heat exchanger is adjusted to be communicated with the expander through a steam channel, the high-temperature heat exchanger is communicated with the expander through the fourth expander and the second high-temperature heat exchanger through the steam channel, the second high-temperature heat exchanger is also communicated with the outside through a heat source medium channel, and the fourth expander is connected with a compressor and transmits power to form the single working medium combined cycle power device.
Description of the drawings:
FIG. 1 is a schematic 1 st principal thermodynamic system diagram of a single-working-medium combined cycle power plant provided in accordance with the present invention.
FIG. 2 is a schematic thermodynamic system diagram of the 2 nd principle of a single-working-medium combined cycle power plant provided in accordance with the present invention.
FIG. 3 is a schematic thermodynamic system diagram of the 3 rd embodiment of a single-working-medium combined cycle power plant according to the present invention.
FIG. 4 is a diagram of a 4 th principal thermodynamic system of a single-working-medium combined cycle power plant according to the present invention.
FIG. 5 is a schematic thermodynamic system diagram of the 5 th principle of a single-working-medium combined cycle power plant according to the present invention.
FIG. 6 is a 6 th principal thermodynamic system diagram of a single-working-medium combined cycle power plant provided in accordance with the present invention.
FIG. 7 is a 7 th principal thermodynamic system diagram of a single-working-medium 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 single-working-medium combined cycle power plant according to the present invention.
FIG. 9 is a diagram of a 9 th principal thermodynamic system of a single-working-medium combined cycle power plant provided in accordance with the present invention.
FIG. 10 is a diagram of a 10 th principal thermodynamic system of a single-working-medium combined cycle power plant according to the present invention.
FIG. 11 is a schematic diagram of the 11 th principal thermodynamic system of a single-working-medium combined cycle power plant according to the present invention.
In the figure, 1-expander, 2-second expander, 3-compressor, 4-third expander, 5-circulating pump, 6-high temperature heat exchanger, 7-condenser, 8-evaporator (waste heat boiler), 9-heat supplier, 10-heat regenerator, 11-high temperature heat regenerator, 12-second compressor, 13-second high temperature heat exchanger, 14-fourth expander, 15-low temperature heat regenerator, 16-second 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 single-working-medium combined-cycle power plant shown in fig. 1 is realized in such a way that:
(1) structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser and an evaporator; the condenser 7 is provided with a condensate pipeline, a steam channel of the evaporator 8 is communicated with the second expander 2 after the condensate pipeline is communicated with the evaporator 8 through the circulating pump 5, the second expander 2 is also provided with a steam channel to be communicated with the high-temperature heat exchanger 6, the compressor 3 is provided with a steam channel to be communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel to be communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel, a low-pressure steam channel of the evaporator 8 is communicated with the compressor 3 and the third expander 4 respectively, and the third expander 4 is also provided with a low-pressure steam channel to be communicated with the condenser 7; the high-temperature heat exchanger 6 is also communicated with the outside through a heat source medium channel, the condenser 7 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 condensate of the condenser 7 is boosted by the circulating pump 5 and enters the evaporator 8, absorbs heat, raises temperature, vaporizes and overheats, flows through the second expander 2, reduces pressure, works, then enters the high-temperature heat exchanger 6 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the high-temperature heat exchanger 6 to absorb heat and raise temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the evaporator 8 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the third expander 4 to reduce the pressure and do work and then enters the condenser 7 to release heat and condense; the heat source medium provides driving heat load through the high-temperature heat exchanger 6, and the cooling medium takes away low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
Incidentally, in the present technology and in subsequent solutions, the mechanical energy output from the expander 1, the second expander 2, and the third expander 4 can simultaneously power the compressor 3, the circulation pump 5, and the outside.
The single-working-medium combined-cycle power plant shown in fig. 2 is realized in such a way that:
in the single-working medium combined cycle power plant shown in fig. 1, the evaporator 8 is additionally provided with a heat source medium passage to communicate with the outside; the condensate entering the evaporator 8 simultaneously obtains the heat load provided by the low-pressure steam and the heat source medium, and then enters the second expansion machine 2 to reduce the pressure and do work, thus forming the single-working-medium combined cycle power device.
The single-working-medium combined-cycle power plant shown in fig. 3 is realized in such a way that:
(1) structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat supply device; the condenser 7 has a condensate pipeline, the evaporator 8 is communicated with the second expander 2 through a steam channel after the condensate pipeline is communicated with the evaporator 8 through a circulating pump 5, the second expander 2 is also communicated with a high-temperature heat exchanger 6 through a steam channel, the compressor 3 is communicated with the high-temperature heat exchanger 6 through a steam channel, the high-temperature heat exchanger 6 is also communicated with the expander 1 through a steam channel, the expander 1 is also communicated with a heat supplier 9 through a low-pressure steam channel, the heat supplier 9 is also communicated with the compressor 3 and the third expander 4 through a low-pressure steam channel, and the third expander 4 is also communicated with the condenser 7 through a low-pressure steam channel; the high-temperature heat exchanger 6 is also provided with a heat source medium channel communicated with the outside, the condenser 7 is also provided with a cooling medium channel communicated with the outside, the evaporator 8 is also provided with a heat source medium channel communicated with the outside, the heat supplier 9 is also provided with a heated medium channel communicated with the outside, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the condensate of the condenser 7 is boosted by the circulating pump 5 and enters the evaporator 8, absorbs heat, raises temperature, vaporizes and overheats, flows through the second expander 2, reduces pressure, works, then enters the high-temperature heat exchanger 6 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the high-temperature heat exchanger 6 to absorb heat and raise temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the heat supplier 9 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the third expander 4 to reduce the pressure and do work and then enters the condenser 7 to release heat and condense; a heat source medium provides a driving heat load through a high-temperature heat exchanger 6 and an evaporator 8, a cooling medium takes away a low-temperature heat load through a condenser 7, and a heated medium takes away a medium-temperature heat load through a heat supplier 9; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 4 is realized in such a way that:
(1) structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat regenerator; the condenser 7 is provided with a condensate pipeline, a circulating pump 5 and a heat regenerator 10 are communicated with the evaporator 8, then a steam channel of the evaporator 8 is communicated with the second expander 2, the steam channel of the second expander 2 is communicated with the high-temperature heat exchanger 6, the steam channel of the compressor 3 is communicated with the high-temperature heat exchanger 6, the steam channel of the high-temperature heat exchanger 6 is communicated with the expander 1, the expander 1 is also divided into two paths after being communicated with the evaporator 8, namely, the first path is communicated with the compressor 3, and the second path is communicated with the third expander 4 through the heat regenerator 10; the third expander 4 is also provided with a low-pressure steam channel communicated with the condenser 7, the high-temperature heat exchanger 6 is also provided with a heat source medium channel communicated with the outside, the condenser 7 is also provided with a cooling medium channel communicated with the outside, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the condensate of the condenser 7 flows through the circulating pump 5 to be boosted, flows through the heat regenerator 10 and the evaporator 8 to absorb heat, raise temperature, vaporize and overheat, flows through the second expander 2 to be decompressed and do work, then enters the high-temperature heat exchanger 6 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the high-temperature heat exchanger 6 to absorb heat and raise temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the evaporator 8 to release heat and reduce the temperature, and then is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the heat regenerator 10 to release heat and flows through the third expander 4 to reduce the pressure and do work, and then enters the condenser 7 to release heat and condense; the heat source medium provides driving heat load through the high-temperature heat exchanger 6, and the cooling medium takes away low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 5 is realized in such a way that:
(1) structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat regenerator; the condenser 7 is provided with a condensate pipeline, a circulating pump 5 and a heat regenerator 10 are communicated with the evaporator 8, then a steam channel of the evaporator 8 is communicated with the second expander 2, the steam channel of the second expander 2 is communicated with the high-temperature heat exchanger 6, the steam channel of the compressor 3 is communicated with the high-temperature heat exchanger 6, the steam channel of the high-temperature heat exchanger 6 is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 8 and then divided into two paths, wherein the first path is communicated with the compressor 3 through the heat regenerator 10, and the second path is directly communicated with the third expander 4; the third expander 4 is also provided with a low-pressure steam channel communicated with the condenser 7, the high-temperature heat exchanger 6 is also provided with a heat source medium channel communicated with the outside, the condenser 7 is also provided with a cooling medium channel communicated with the outside, and the expander 1 is connected with the compressor 3 and transmits power.
(2) In the process, the condensate of the condenser 7 flows through the circulating pump 5 to be boosted, flows through the heat regenerator 10 and the evaporator 8 to absorb heat, raise temperature, vaporize and overheat, flows through the second expander 2 to be decompressed and do work, then enters the high-temperature heat exchanger 6 to absorb heat and raise temperature, and the steam discharged by the compressor 3 enters the high-temperature heat exchanger 6 to absorb heat and raise temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the evaporator 8 to release heat and reduce the temperature, and then is divided into two paths, wherein the first path flows through the heat regenerator 10 to release heat and then enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the third expander 4 to reduce the pressure and do work and then enters the condenser 7 to release heat and condense; the heat source medium provides driving heat load through the high-temperature heat exchanger 6, and the cooling medium takes away low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 6 is realized in such a way that:
(1) structurally, the system mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature heat regenerator; the condenser 7 is provided with a condensate pipeline, the evaporator 8 is provided with a steam channel communicated with the second expander 2 after being communicated with the evaporator 8 through the circulating pump 5, the second expander 2 is also provided with a steam channel communicated with the high-temperature heat exchanger 6 through the high-temperature heat regenerator 11, the compressor 3 is provided with a steam channel communicated with the high-temperature heat exchanger 6 through the high-temperature heat regenerator 11, the high-temperature heat exchanger 6 is also provided with a steam channel communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel communicated with the high-temperature heat regenerator 11, the high-temperature heat regenerator 11 is also provided with a low-pressure steam channel, the evaporator 8 is provided with a low-pressure steam channel communicated with the compressor 3 and the third expander 4 respectively, and the third expander 4 is also provided with a low-pressure steam channel communicated with the condenser 7; the high-temperature heat exchanger 6 is also communicated with the outside through a heat source medium channel, the condenser 7 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 condensate of the condenser 7 is boosted by the circulating pump 5 and enters the evaporator 8, absorbs heat, raises the temperature, vaporizes and overheats, flows through the second expander 2, reduces the pressure, works, flows through the high-temperature heat regenerator 11, absorbs heat, raises the temperature, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; steam discharged by the compressor 3 flows through the high-temperature heat regenerator 11 to absorb heat and raise the temperature, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the high-temperature heat regenerator 11 and the evaporator 8 to gradually release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the third expander 4 to reduce the pressure and do work and then enters the condenser 7 to release heat and condense; the heat source medium provides driving heat load through the high-temperature heat exchanger 6, and the cooling medium takes away low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 7 is realized in such a way that:
(1) structurally, in the single-working-medium combined cycle power plant shown in fig. 1, a low-temperature heat regenerator and a second circulating pump are added, a condensate pipeline of a condenser 7 is communicated with an evaporator 8 through a circulating pump 5 and adjusted to be that the condenser 7 is communicated with the low-temperature heat regenerator 15 through the circulating pump 5, a middle steam extraction channel is additionally arranged on a compressor 3 and is communicated with the low-temperature heat regenerator 15, and the low-temperature heat regenerator 15 is communicated with the evaporator 8 through a condensate pipeline of the second circulating pump 16.
(2) In the process, the condensate of the condenser 7 is boosted by the circulating pump 5 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 second circulating pump 16 and enters an evaporator 8, absorbs heat, increases the temperature, vaporizes and overheats, flows through a second expander 2, reduces the pressure, works, then enters a high-temperature heat exchanger 6 to absorb heat and increase the temperature, and the steam discharged by a compressor 3 enters the high-temperature heat exchanger 6 to absorb heat and increase the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the evaporator 8 to release heat and reduce the temperature, and then the low-pressure steam is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the third expander 4 to reduce the pressure and do work and then enters the condenser 7 to release heat and condense; the low-pressure steam entering the compressor 3 is subjected to pressure boosting and temperature rising to a certain degree and then is divided into two paths, wherein the first path enters the low-temperature heat regenerator 15 through the middle steam extraction channel to release heat and condense, and the second path is continuously subjected to pressure boosting and temperature rising and then is supplied to the high-temperature heat exchanger 6; the heat source medium provides driving heat load through the high-temperature heat exchanger 6, and the cooling medium takes away low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 8 is realized in such a way that:
(1) structurally, in the single-working-medium combined cycle power plant shown in fig. 4, a low-temperature heat regenerator and a second circulating pump are added, a condensate pipeline of a condenser 7 is communicated with an evaporator 8 through a circulating pump 5 and a heat regenerator 10, and is adjusted to be communicated with the low-temperature heat regenerator 15 through the circulating pump 5 and the heat regenerator 10, 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 communicated with the evaporator 8 through a condensate pipeline of the second circulating pump 16.
(2) In the process, the condensate of the condenser 7 flows through the circulating pump 5 to be boosted and flows through the heat regenerator 10 to absorb heat, then enters the low-temperature heat regenerator 15 to be 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 second circulating pump 16 and enters an evaporator 8, absorbs heat, increases the temperature, vaporizes and overheats, flows through a second expander 2, reduces the pressure, works, then enters a high-temperature heat exchanger 6 to absorb heat and increase the temperature, and the steam discharged by a compressor 3 enters the high-temperature heat exchanger 6 to absorb heat and increase the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the expander 1 to reduce the pressure and do work, the low-pressure steam discharged by the expander 1 flows through the evaporator 8 to release heat and reduce the temperature, and then is divided into two paths, wherein the first path enters the compressor 3 to increase the pressure and the temperature, and the second path flows through the heat regenerator 10 to release heat and flows through the third expander 4 to reduce the pressure and do work, and then enters the condenser 7 to release heat and condense; the low-pressure steam entering the compressor 3 is subjected to pressure boosting and temperature rising to a certain degree and then is divided into two paths, wherein the first path enters the low-temperature heat regenerator 15 through the middle steam extraction channel to release heat and condense, and the second path is continuously subjected to pressure boosting and temperature rising and then is supplied to the high-temperature heat exchanger 6; the heat source medium provides driving heat load through the high-temperature heat exchanger 6, and the cooling medium takes away low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 9 is realized by:
(1) structurally, in the single-working-medium combined cycle power plant shown in fig. 1, a second compressor and a second high-temperature heat exchanger are added, the high-temperature heat exchanger 6 is adjusted to be communicated with the expander 1 through a steam channel, the high-temperature heat exchanger 6 is communicated with the expander 1 through the second compressor 12 and the second high-temperature heat exchanger 13, the second high-temperature heat exchanger 13 is also communicated with the outside through a heat source medium channel, and the expander 1 is connected with the second compressor 12 and transmits power.
(2) Compared with the single-working medium combined cycle power plant shown in the figure 1, the difference in the flow is that: the steam discharged by the high-temperature heat exchanger 6 flows through the second compressor 12 to increase the pressure and the temperature, flows through the second high-temperature heat exchanger 13 to absorb heat and increase the temperature, and then enters the expander 1; the heat source medium provides a driving heat load through the high-temperature heat exchanger 6 and the second high-temperature heat exchanger 13, and the cooling medium takes away a low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 provide power to the compressor 3, the second compressor 12 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 10 is realized in such a way that:
(1) structurally, in the single-working-medium combined cycle power plant shown in fig. 6, a second compressor and a second high-temperature heat exchanger are added, the high-temperature heat exchanger 6 is adjusted to have a steam passage communicated with the expander 1, the high-temperature heat exchanger 6 has a steam passage communicated with the expander 1 through the second compressor 12 and the second high-temperature heat exchanger 13, the second high-temperature heat exchanger 13 also has a heat source medium passage communicated with the outside, and the expander 1 is connected with the second compressor 12 and transmits power.
(2) Compared with the single-working medium combined cycle power plant shown in FIG. 6, the difference in the flow is that: the steam discharged by the high-temperature heat exchanger 6 flows through the second compressor 12 to increase the pressure and the temperature, flows through the second high-temperature heat exchanger 13 to absorb heat and increase the temperature, and then enters the expander 1; the heat source medium provides a driving heat load through the high-temperature heat exchanger 6 and the second high-temperature heat exchanger 13, and the cooling medium takes away a low-temperature heat load through the condenser 7; the expander 1, the second expander 2 and the third expander 4 provide power to the compressor 3, the second compressor 12 and the outside, forming a single-working-medium combined-cycle power plant.
The single-working-medium combined-cycle power plant shown in fig. 11 is realized by:
(1) structurally, in the single-working-medium combined cycle power plant shown in fig. 1, a fourth expander and a second high-temperature heat exchanger are added, the high-temperature heat exchanger 6 is adjusted to have a steam passage communicated with the expander 1, the high-temperature heat exchanger 6 has a steam passage communicated with the expander 1 through the fourth expander 14 and the second high-temperature heat exchanger 13, the second high-temperature heat exchanger 13 also has a heat source medium passage communicated with the outside, and the fourth expander 14 is connected with the compressor 3 and transmits power.
(2) Compared with the single-working medium combined cycle power plant shown in the figure 1, the difference in the flow is that: the steam discharged by the high-temperature heat exchanger 6 flows through the fourth expander 14 to reduce the pressure and do work, flows through the second high-temperature heat exchanger 13 to absorb heat and raise the temperature, and then enters the expander 1; the heat source medium provides a driving heat load through the high-temperature heat exchanger 6 and the second high-temperature heat exchanger 13, and the cooling medium takes away a low-temperature heat load through the condenser 7; the expander 1, the second expander 2, the third expander 4 and the fourth expander 14 power the compressor 3 and the outside, forming a single-working-medium combined-cycle power plant.
The effect that the technology of the invention can realize-the single-working medium combined cycle power device provided by the invention has the following effects and advantages:
(1) the circulating working medium completes high-temperature heat absorption under low pressure, the temperature difference loss between the circulating working medium and a high-temperature heat source is small, and the heat efficiency of a system and the safety of the device are improved.
(2) The cycle working medium mainly depends on the condensation phase change process to realize low-temperature heat release, the temperature difference loss between the cycle working medium and the environment is controllable, and the heat efficiency is improved.
(3) In the high-temperature area, a low-pressure high-temperature operation mode is adopted, and the contradiction between the heat efficiency, the circulating medium parameters and the pressure and temperature resistance of the pipe is coordinated, so that the temperature difference loss between a heat source and the circulating medium can be greatly reduced, and the heat efficiency is greatly improved.
(4) The equipment is shared, the heat absorption process of the lower cycle, namely the Rankine cycle, is increased, and the heat efficiency is improved.
(5) And a single working medium is adopted, so that the operation cost is reduced, and the adjustment flexibility of the thermal power device is improved.
(6) The high-temperature expander is shared, the number of core equipment is reduced, and the system investment is favorably reduced and the heat efficiency is favorably improved.
(7) The device can effectively deal with high-temperature heat sources and variable-temperature heat sources, and deal with high-quality fuels and non-high-quality fuels, and has wide application range.
(8) On the premise of realizing high thermal efficiency, low-pressure operation can be selected, so that the operation safety of the device is greatly improved.
(9) The heat recovery of the enterprise device can be simply, actively, safely and efficiently realized.
(10) 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 (12)

1. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser and an evaporator; the condenser (7) is provided with a condensate pipeline, a steam channel of the evaporator (8) is communicated with the second expander (2) after the condensate pipeline is communicated with the evaporator (8) through a circulating pump (5), the second expander (2) is also provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the compressor (3) is provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel to be communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel to be communicated with the evaporator (8), the evaporator (8) is also provided with a low-pressure steam channel to be respectively communicated with the compressor (3) and the third expander (4), and the third expander (4) is also provided with a low-pressure steam channel to be communicated with the condenser (7); the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) or the 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 single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
2. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat supplier; the condenser (7) is provided with a condensate pipeline, a steam channel of the evaporator (8) is communicated with the second expander (2) after the condensate pipeline is communicated with the evaporator (8) through a circulating pump (5), the second expander (2) is also provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the compressor (3) is provided with a steam channel to be communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel to be communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel to be communicated with the heat supply device (9), the heat supply device (9) is also provided with a low-pressure steam channel to be respectively communicated with the compressor (3) and the third expander (4), and the third expander (4) is also provided with a low-pressure steam channel to be communicated with the condenser (7); the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) is also provided with a heat source medium channel communicated with the outside, the heater (9) is also provided with a heated medium channel communicated with the outside, and the expander (1) is connected with the compressor (3) and transmits power to form a single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
3. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat regenerator; the condenser (7) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (8) through a circulating pump (5) and a heat regenerator (10), then a steam channel of the evaporator (8) 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 (6), the compressor (3) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (8) and then divided into two paths, namely, the first path is communicated with the compressor (3), and the second path is communicated with the third expander (4) through the heat regenerator (10); the third expander (4) is also provided with a low-pressure steam channel communicated with a condenser (7), the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) or the heat source medium channel is also communicated with the outside, the heat regenerator (10) or the 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 single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
4. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a heat regenerator; the condenser (7) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (8) through a circulating pump (5) and a heat regenerator (10), then a steam channel of the evaporator (8) 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 (6), the compressor (3) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (8) and then divided into two paths, wherein the first path is communicated with the compressor (3) through the heat regenerator (10), and the second path is directly communicated with the third expander (4); the third expander (4) is also provided with a low-pressure steam channel communicated with a condenser (7), the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) or the heat source medium channel is also communicated with the outside, the heat regenerator (10) or the 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 single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
5. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator and a high-temperature heat regenerator; the condenser (7) is provided with a condensate pipeline which is communicated with the evaporator (8) through a circulating pump (5), then the evaporator (8) is provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (6) through a high-temperature heat regenerator (11), the compressor (3) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6) through the high-temperature heat regenerator (11), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the high-temperature heat regenerator (11), the high-temperature heat regenerator (11) is also provided with a low-pressure steam channel which is communicated with the evaporator (8), then the evaporator (8) is also provided with a low-pressure steam channel which is respectively communicated with the compressor (3) and the third expander (4), and the third expander (4) is also provided with a low-pressure steam channel which is communicated with the condenser (7); the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) or the 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 single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
6. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator, a heat supply device and a high-temperature heat regenerator; the condenser (7) is provided with a condensate pipeline which is communicated with the evaporator (8) through a circulating pump (5), then the evaporator (8) is provided with a steam channel which is communicated with the second expander (2), the second expander (2) is also provided with a steam channel which is communicated with the high-temperature heat exchanger (6) through a high-temperature heat regenerator (11), the compressor (3) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6) through the high-temperature heat regenerator (11), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the high-temperature heat regenerator (11), the high-temperature heat regenerator (11) is also provided with a low-pressure steam channel which is communicated with a heat supplier (9), then the heat supplier (9) is provided with a low-pressure steam channel which is respectively communicated with the compressor (3) and the third expander (4), and the third expander (4) is also provided with a low-pressure steam channel which is communicated with the condenser (7); the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) is also provided with a heat source medium channel communicated with the outside, the heater (9) is also provided with a heated medium channel communicated with the outside, and the expander (1) is connected with the compressor (3) and transmits power to form a single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
7. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator, a heat regenerator and a high-temperature heat regenerator; the condenser (7) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (8) through a circulating pump (5) and a heat regenerator (10), then a steam channel of the evaporator (8) is communicated with a second expander (2), the second expander (2) is also provided with a steam channel which is communicated with a high-temperature heat exchanger (6) through a high-temperature heat regenerator (11), the compressor (3) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6) through the high-temperature heat regenerator (11), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the high-temperature heat regenerator (11), the high-temperature heat regenerator (11) is also provided with a low-pressure steam channel which is communicated with the evaporator (8) and then divided into two paths, wherein the first path is communicated with the compressor (3), and the second path is communicated with a third expander (4) through the heat regenerator (10); the third expander (4) is also provided with a low-pressure steam channel communicated with a condenser (7), the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) or the heat source medium channel is also communicated with the outside, the heat regenerator (10) or the 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 single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
8. The single-working medium combined cycle power plant mainly comprises an expander, a second expander, a compressor, a third expander, a circulating pump, a high-temperature heat exchanger, a condenser, an evaporator, a heat regenerator and a high-temperature heat regenerator; the condenser (7) is provided with a condensate pipeline, the condensate pipeline is communicated with the evaporator (8) through a circulating pump (5) and a heat regenerator (10), then a steam channel of the evaporator (8) is communicated with a second expander (2), the second expander (2) is also provided with a steam channel which is communicated with a high-temperature heat exchanger (6) through a high-temperature heat regenerator (11), a steam channel of the compressor (3) is communicated with the high-temperature heat exchanger (6) through the high-temperature heat regenerator (11), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the high-temperature heat regenerator (11), the high-temperature heat regenerator (11) is also provided with a low-pressure steam channel which is communicated with the evaporator (8) and then divided into two paths, wherein the first path is communicated with the compressor (3) through the heat regenerator (10), and the second path is directly communicated with a third expander (4); the third expander (4) is also provided with a low-pressure steam channel communicated with a condenser (7), the high-temperature heat exchanger (6) is also provided with a heat source medium channel communicated with the outside, the condenser (7) is also provided with a cooling medium channel communicated with the outside, the evaporator (8) or the heat source medium channel is also communicated with the outside, the heat regenerator (10) or the 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 single-working-medium combined cycle power device; wherein, or the expander (1) is connected with the compressor (3) and the circulating pump (5) and transmits power.
9. A single working medium combined cycle power device is characterized in that a low-temperature heat regenerator and a second circulating pump are added in any one of the single working medium combined cycle power devices of claims 1-2 and 5-6, a condenser (7) is provided with a condensate pipeline which is communicated with an evaporator (8) through the circulating pump (5) and adjusted to be that the condenser (7) is provided with a condensate pipeline which is communicated with a low-temperature heat regenerator (15) through the circulating pump (5), a middle steam extraction channel is additionally arranged on a compressor (3) and is communicated with the low-temperature heat regenerator (15), and the low-temperature heat regenerator (15) is further provided with a condensate pipeline which is communicated with the evaporator (8) through the second circulating pump (16), so that the single working medium combined cycle power device is formed.
10. A single-working medium combined cycle power device is characterized in that a low-temperature heat regenerator and a second circulating pump are added in the single-working medium combined cycle power device as claimed in any one of claims 3-4 and 7-8, a condenser (7) is provided with a condensate pipeline which is communicated with an evaporator (8) through a circulating pump (5) and a heat regenerator (10) and is adjusted to be that the condenser (7) is provided with a condensate pipeline which is communicated with a low-temperature heat regenerator (15) through the circulating pump (5) and the heat regenerator (10), a middle steam extraction channel is additionally arranged on a compressor (3) and is communicated with the low-temperature heat regenerator (15), and the condensate pipeline of the low-temperature heat regenerator (15) is communicated with the evaporator (8) through the second circulating pump (16) to form the single-working medium combined cycle power device.
11. The single working medium combined cycle power device is characterized in that a second compressor and a second high-temperature heat exchanger are added in the single working medium combined cycle power device as claimed in any one of claims 1 to 10, a steam channel of the high-temperature heat exchanger (6) is communicated with the expander (1) and is adjusted to be communicated with the expander (1), the high-temperature heat exchanger (6) is provided with a steam channel which is communicated with the expander (1) through the second compressor (12) and the second high-temperature heat exchanger (13), the second high-temperature heat exchanger (13) is also provided with a heat source medium channel which is communicated with the outside, and the expander (1) is connected with the second compressor (12) and transmits power to form the single working medium combined cycle power device.
12. The single working medium combined cycle power device is characterized in that a fourth expander and a second high-temperature heat exchanger are added in the single working medium combined cycle power device as claimed in any one of claims 1 to 10, a steam channel of the high-temperature heat exchanger (6) is communicated with the expander (1) and is adjusted to be communicated with the expander (1), the high-temperature heat exchanger (6) is provided with a steam channel which is communicated with the expander (1) through the fourth expander (14) and the second high-temperature heat exchanger (13), the second high-temperature heat exchanger (13) is also provided with a heat source medium channel which is communicated with the outside, and the fourth expander (14) is connected with the compressor (3) and transmits power to form the single working medium combined cycle power device.
CN202111471467.0A 2020-11-25 2021-11-24 Single-working medium combined cycle power plant Pending CN114370308A (en)

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CN2020113968162 2020-11-25
CN202011396816 2020-11-25

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CN114370308A true CN114370308A (en) 2022-04-19

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CN (1) CN114370308A (en)

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