CN111255535A - Combined cycle power plant - Google Patents

Combined cycle power plant Download PDF

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Publication number
CN111255535A
CN111255535A CN201911130953.9A CN201911130953A CN111255535A CN 111255535 A CN111255535 A CN 111255535A CN 201911130953 A CN201911130953 A CN 201911130953A CN 111255535 A CN111255535 A CN 111255535A
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China
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communicated
heat exchanger
temperature heat
combined cycle
expansion speed
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CN201911130953.9A
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Chinese (zh)
Inventor
李鸿瑞
李华玉
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • 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
    • F01K23/065—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 the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
    • 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
    • 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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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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 combined cycle power device, and belongs to the technical field of energy and power. The condenser is provided with a condensate pipeline which is communicated with the mixing evaporator through a circulating pump, the expansion speed increaser is provided with a steam channel which is communicated with the mixing evaporator, the mixing evaporator is also provided with a steam channel which is respectively communicated with a diffuser pipe and the expander, the diffuser pipe is also provided with a steam channel which is communicated with the expansion speed increaser through a high-temperature heat exchanger, and the expander is also provided with a steam channel which is communicated with the condenser; the external part of the internal combustion engine is provided with an air channel communicated with the internal combustion engine, the external part of the internal combustion engine is also provided with a fuel channel communicated with the internal combustion engine, the internal combustion engine is also provided with a fuel gas channel communicated with the external part through a high-temperature heat exchanger, the internal combustion engine is also provided with a cooling medium channel communicated with the external part, the condenser is also provided with a cooling medium channel communicated with the external part, the mixing evaporator is also provided with a heat medium channel communicated with the external part, and the expander, the internal combustion engine and the expansion.

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 are common in human life and production. In the field of power demand technology, the conversion of thermal energy into mechanical energy is an important way to obtain and provide power. In a direct-fired gas-steam combined cycle of high-quality fuel represented by gasoline, diesel and natural gas, high efficiency of converting thermal energy into mechanical energy is the greatest advantage, but there are also problems of complicated apparatus, large manufacturing difficulty and high manufacturing cost. In such combined cycle power plants, the expander, compressor, and heat exchanger are often essential basic and core components; the compressor and the expander are difficult to manufacture, high in material requirement and high in manufacturing cost, which is not beneficial to popularization and application of the combined cycle power device. Therefore, it is sought to replace them with simple components or to simplify the structure of the core components in order to reduce the manufacturing difficulty and cost of the combined cycle power plant.
The invention provides a combined cycle power device which combines an expansion speed increaser and a diffuser pipe and respectively replaces a main expansion machine and a main compressor on the premise of keeping or effectively improving the heat efficiency of the combined cycle power device and aiming at reducing the manufacturing difficulty and the manufacturing cost of core components of the combined cycle power device.
The invention content is as follows:
the invention mainly aims to provide a combined cycle power device which combines an expansion speed increaser and a diffuser pipe and replaces a corresponding main compressor and a corresponding main expander, and the specific contents of the invention are explained in sections as follows:
1. the combined cycle power device mainly comprises a diffuser pipe, an expander, a spray pipe, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator and an internal combustion engine; the condenser is provided with a condensate pipeline which is communicated with the mixing evaporator through a circulating pump, the expander is provided with a steam channel which is communicated with the mixing evaporator through a spray pipe, the mixing evaporator is also provided with a steam channel which is respectively communicated with a diffuser pipe and a second expander, the diffuser pipe is also provided with a steam channel which is communicated with the expander through a high-temperature heat exchanger, and the second expander is also provided with a steam channel which is communicated with the condenser; the external part of the internal combustion engine is provided with an air channel communicated with the internal combustion engine, the external part of the internal combustion engine is also provided with a fuel channel communicated with the internal combustion engine, the internal combustion engine is also provided with a fuel gas channel communicated with the external part through a high-temperature heat exchanger, the internal combustion engine is also provided with a cooling medium channel communicated with the external part, the condenser is also provided with a cooling medium channel communicated with the external part, the mixing evaporator or the heating medium channel is also communicated with the external part, and the expander, the second expander and the internal combustion engine are.
2. The combined cycle power device mainly comprises a diffuser pipe, an expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, an internal combustion engine and an expansion speed increaser; the condenser is provided with a condensate pipeline which is communicated with the mixing evaporator through a circulating pump, the expansion speed increaser is provided with a steam channel which is communicated with the mixing evaporator, the mixing evaporator is also provided with a steam channel which is respectively communicated with a diffuser pipe and the expander, the diffuser pipe is also provided with a steam channel which is communicated with the expansion speed increaser through a high-temperature heat exchanger, and the expander is also provided with a steam channel which is communicated with the condenser; the external part is provided with an air channel communicated with the internal combustion engine, the external part is also provided with a fuel channel communicated with the internal combustion engine, the internal combustion engine is also provided with a fuel gas channel communicated with the external part through a high-temperature heat exchanger, the internal combustion engine is also provided with a cooling medium channel communicated with the external part, the condenser is also provided with a cooling medium channel communicated with the external part, the mixing evaporator or the heating medium channel is also communicated with the external part, and the expander, the internal combustion engine and the expansion speed increaser are connected with the external part and output.
3. The combined cycle power device mainly comprises a diffuser pipe, an expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, an internal combustion engine, an expansion speed increaser and a compressor; the condenser is provided with a condensate pipeline which is communicated with the mixing evaporator through a circulating pump, the expansion speed increaser is provided with a steam channel which is communicated with the mixing evaporator, the mixing evaporator is also provided with a steam channel which is respectively communicated with a diffuser pipe and the expander, the diffuser pipe is also provided with a steam channel which is communicated with the expansion speed increaser through a high-temperature heat exchanger, and the expander is also provided with a steam channel which is communicated with the condenser; the external part is provided with an air channel communicated with the internal combustion engine, the external part is also provided with a gaseous fuel channel communicated with the internal combustion engine through a compressor, the internal combustion engine is also provided with a fuel gas channel communicated with the external part through a high-temperature heat exchanger, the internal combustion engine is also provided with a cooling medium channel communicated with the external part, a condenser is also provided with a cooling medium channel communicated with the external part, a mixing evaporator or a heating medium channel is also communicated with the external part, the internal combustion engine is connected with the compressor and transmits power, and an expander, the internal combustion engine and an expansion speed increaser are.
4. A combined cycle power plant, wherein a newly added compressor and a newly added high temperature heat exchanger are added in any combined cycle power plant of items 2 to 3, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high temperature heat exchanger and adjusted to be communicated with the expansion speed increaser through the high temperature heat exchanger, a steam channel of the newly added compressor is communicated with the expansion speed increaser through the newly added high temperature heat exchanger, a gas channel of an internal combustion engine is communicated with the outside through the high temperature heat exchanger and adjusted to be communicated with the gas channel of the internal combustion engine through the newly added high temperature heat exchanger and the high temperature heat exchanger, and the expansion speed increaser is connected with the newly added compressor and transmits power, thereby forming the combined cycle power plant.
5. A combined cycle power plant, in any of the combined cycle power plants described in items 2-3, a newly added dual-energy compressor and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high-temperature heat exchanger and adjusted to be communicated with the newly added dual-energy compressor through the steam channel of the diffuser pipe and the high-temperature heat exchanger, a steam channel of the newly added dual-energy compressor is communicated with the expansion speed increaser through the newly added high-temperature heat exchanger, a gas channel of an internal combustion engine is communicated with the outside through the high-temperature heat exchanger and adjusted to be communicated with the inside through the gas channel of the internal combustion engine and the newly added high-temperature heat exchanger, and the expansion speed increaser is connected with the newly added dual-energy.
6. A combined cycle power plant, wherein a newly added diffuser pipe and a newly added high temperature heat exchanger are added in any combined cycle power plant of items 2 to 3, the communication between a steam channel of the diffuser pipe and an expansion speed increaser through the high temperature heat exchanger is adjusted to be that the steam channel of the diffuser pipe is communicated with the newly added diffuser pipe through the high temperature heat exchanger, the steam channel of the newly added diffuser pipe is communicated with the expansion speed increaser through the newly added high temperature heat exchanger, the communication between a gas channel of an internal combustion engine and the outside is adjusted to be that the gas channel of the internal combustion engine is communicated with the outside through the newly added high temperature heat exchanger and the high temperature heat exchanger, and the combined cycle power plant is formed.
7. A combined cycle power plant, wherein a newly added expander and a newly added high temperature heat exchanger are added in any combined cycle power plant of items 2 to 3, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high temperature heat exchanger and is adjusted to be communicated with the expansion speed increaser through the high temperature heat exchanger, a steam channel of the newly added expander is communicated with the expansion speed increaser through the newly added high temperature heat exchanger, a gas channel of an internal combustion engine is communicated with the outside through the high temperature heat exchanger and is adjusted to be communicated with the gas channel of the internal combustion engine through the newly added high temperature heat exchanger and the high temperature heat exchanger, and the newly added expander is connected with the outside and transmits power, thereby forming the combined cycle power plant.
8. A combined cycle power plant, wherein a newly added expansion speed increaser and a newly added high-temperature heat exchanger are added in any one of the combined cycle power plants described in items 2-3, a steam channel of a diffuser pipe is communicated with the expansion speed increaser through the high-temperature heat exchanger and adjusted to be communicated with the newly added expansion speed increaser through the high-temperature heat exchanger, a steam channel of the newly added expansion speed increaser is communicated with the expansion speed increaser through the newly added high-temperature heat exchanger, a gas channel of an internal combustion engine is communicated with the outside through the high-temperature heat exchanger and adjusted to be communicated with the outside through the gas channel of the internal combustion engine through the newly added high-temperature heat exchanger and the high-temperature heat exchanger, and the newly added expansion speed increaser is connected with the.
9. A combined cycle power plant, wherein a spray pipe and a new-increased heat exchanger are added in any combined cycle power plant of items 2 to 3, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through a high-temperature heat exchanger and is adjusted to be communicated with the expansion speed increaser through a high-temperature heat exchanger, a steam channel of the spray pipe is communicated with the spray pipe through the new-increased high-temperature heat exchanger, a gas channel of an internal combustion engine is communicated with the outside through the high-temperature heat exchanger and is adjusted to be communicated with the gas channel of the internal combustion engine through the new-increased high-temperature heat exchanger and the high-temperature heat exchanger, and the combined cycle power.
10. A combined cycle power device is characterized in that a heat regenerator is added in any combined cycle power device in items 2-3, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through a high-temperature heat exchanger and adjusted to be communicated with the expansion speed increaser through the heat regenerator and the high-temperature heat exchanger, a steam channel of the expansion speed increaser is communicated with a mixed evaporator through the heat regenerator and the high-temperature heat exchanger, and the steam channel of the expansion speed increaser is communicated with the mixed evaporator through the heat regenerator to form the combined cycle power device.
11. A combined cycle power plant, in any of the combined cycle power plants described in items 2-3, a heat regenerator, a newly-added compressor and a newly-added high temperature heat exchanger are added, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high temperature heat exchanger and adjusted to be communicated with the newly-added compressor through the steam channel of the diffuser pipe and the heat regenerator, a steam channel of the newly-added compressor is communicated with the expansion speed increaser through the newly-added high temperature heat exchanger, a steam channel of the expansion speed increaser is communicated with a mixed evaporator and adjusted to be communicated with the mixed evaporator through the steam channel of the expansion speed increaser, a steam channel of the internal combustion engine is communicated with the mixed evaporator through the heat regenerator, a gas channel of the internal combustion engine is communicated with the outside through the high temperature heat exchanger and the newly-added high temperature heat exchanger, the expansion speed increaser is connected, forming a combined cycle power plant.
12. A combined cycle power plant, in any of the combined cycle power plants described in items 2-3, a heat regenerator, a newly added dual-energy compressor and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high-temperature heat exchanger and adjusted to be communicated with the newly added dual-energy compressor through the heat regenerator and the high-temperature heat exchanger, a steam channel of the newly added dual-energy compressor is communicated with the expansion speed increaser through the newly added high-temperature heat exchanger, a steam channel of the expansion speed increaser is communicated with a mixing evaporator through the mixing evaporator and adjusted to be communicated with the mixing evaporator through the heat regenerator, a gas channel of an internal combustion engine is communicated with the outside through the high-temperature heat exchanger and adjusted to be communicated with the outside through the gas channel of the internal combustion engine through the newly added high-temperature heat exchanger and the high-temperature heat exchanger, the expansion speed increaser, forming a combined cycle power plant.
13. A combined cycle power plant, in any of the combined cycle power plants described in items 2-3, a heat regenerator, a newly-added diffuser pipe and a newly-added high-temperature heat exchanger are added, a steam channel of the diffuser pipe is communicated with an expansion speed increaser through the high-temperature heat exchanger and adjusted to be communicated with the steam channel of the diffuser pipe through the heat regenerator and the high-temperature heat exchanger, the steam channel of the newly-added diffuser pipe is communicated with the expansion speed increaser through the newly-added high-temperature heat exchanger, the steam channel of the expansion speed increaser is communicated with a mixed evaporator to be communicated with the expansion speed increaser, the steam channel of the expansion speed increaser is communicated with the mixed evaporator through the heat regenerator, a gas channel of the internal combustion engine is communicated with the outside through the high-temperature heat exchanger and adjusted to be communicated with the outside through the gas channel of the.
14. A combined cycle power plant, which is characterized in that a heat regenerator, a new expansion machine and a new high temperature heat exchanger are added in any combined cycle power plant of items 2 to 3, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high temperature heat exchanger and is adjusted to be communicated with the new expansion machine through the heat regenerator and the high temperature heat exchanger, a steam channel of the new expansion machine is communicated with the expansion speed increaser through the new high temperature heat exchanger, the steam channel of the expansion speed increaser is communicated with a mixed evaporator through the new high temperature heat exchanger, the steam channel of the expansion speed increaser is adjusted to be communicated with the mixed evaporator through the heat regenerator, a gas channel of an internal combustion engine is communicated with the outside through the high temperature heat exchanger and is adjusted to be communicated with the outside through the gas channel of the internal combustion engine through the new high temperature heat exchanger and the high temperature heat exchanger, the new expansion, forming a combined cycle power plant.
15. A combined cycle power plant, in any one of the combined cycle power plants of items 2-3, a heat regenerator, a newly added expansion speed increaser and a newly added high temperature heat exchanger are added, a steam channel of a diffuser pipe is communicated with the expansion speed increaser through the high temperature heat exchanger and adjusted to be communicated with the newly added expansion speed increaser through the heat regenerator and the high temperature heat exchanger, a steam channel of the newly added expansion speed increaser is communicated with the expansion speed increaser through the newly added high temperature heat exchanger, a steam channel of the expansion speed increaser is communicated with a mixed evaporator through the newly added high temperature heat exchanger, an expansion speed increaser is communicated with the mixed evaporator through the steam channel, a steam channel of the internal combustion engine is communicated with the mixed evaporator through the heat regenerator, a gas channel of the internal combustion engine is communicated with the outside through the high temperature heat exchanger and the newly added high temperature heat exchanger, the newly added expansion speed incre, forming a combined cycle power plant.
16. A combined cycle power plant, which is characterized in that a heat regenerator, a spray pipe and a newly-increased high-temperature heat exchanger are added in any combined cycle power plant of items 2 to 3, a steam channel of a diffuser pipe is communicated with an expansion speed increaser through the high-temperature heat exchanger and is adjusted to be communicated with the expansion speed increaser through the steam channel, the steam channel of the diffuser pipe is communicated with the spray pipe through the heat regenerator and the high-temperature heat exchanger, the steam channel of the spray pipe is communicated with the expansion speed increaser through the newly-increased high-temperature heat exchanger, the steam channel of the expansion speed increaser is communicated with a mixed evaporator through the mixed evaporator and is adjusted to be communicated with the outside through the heat regenerator, and a fuel gas channel of an internal combustion engine is communicated with the outside through the high-temperature heat exchanger and the newly-increased high-.
17. A combined cycle power device is characterized in that a mixed heat regenerator and a second circulating pump are added in any combined cycle power device in items 2 to 16, a condenser with a condensate pipeline communicated with a mixed evaporator through the circulating pump is adjusted to be a condenser with a condensate pipeline communicated with the mixed heat regenerator through the circulating pump, an expander is additionally provided with a steam extraction channel communicated with the mixed heat regenerator, the mixed heat regenerator is further provided with a condensate pipeline communicated with the mixed evaporator through the second circulating pump, and the combined cycle power device is formed.
18. A combined cycle power plant, wherein a preheater is added in any one of the combined cycle power plants described in items 2-16, a condenser with a condensate pipeline communicated with a mixing evaporator through a circulating pump is adjusted to be communicated with the mixing evaporator through the circulating pump and the preheater, and the preheater is also communicated with the outside through a heat medium channel to form the combined cycle power plant.
19. A combined cycle power plant, wherein an intermediate reheater is added to any one of the combined cycle power plants described in items 2 to 16, and the hybrid evaporator having a steam passage communicating with an expander and the expander having a steam passage communicating with a condenser is adjusted such that the hybrid evaporator having a steam passage communicating with the expander, the expander having an intermediate reheated steam passage communicating with the expander through the intermediate reheater and the expander having a steam passage communicating with the condenser, and the intermediate reheater having a heat medium passage communicating with the outside, thereby forming the combined cycle power plant.
20. A combined cycle power plant, in any of the combined cycle power plants described in items 2-19, a cooling medium channel communicated with the outside of an internal combustion engine is cancelled, a newly added circulating pump is added, a condensate pipeline is additionally arranged on a condenser and is communicated with the internal combustion engine through the newly added circulating pump, and then a steam channel of the internal combustion engine is communicated with an expander to form the combined cycle power plant.
21. A combined cycle power plant, in any of the combined cycle power plants described in items 2-19, a cooling medium channel communicated with the outside of the internal combustion engine is cancelled, a newly added circulating pump and a newly added superheater are added, a condensate pipeline additionally arranged on a condenser is communicated with the internal combustion engine through the newly added circulating pump, then a steam channel of the internal combustion engine is communicated with an expander through the newly added superheater, and a heat medium channel of the newly added superheater is communicated with the outside, so that the combined cycle power plant is formed.
Description of the drawings:
FIG. 1 is a schematic 1 st thermodynamic system diagram of a combined cycle power plant according to the present invention.
FIG. 2 is a schematic thermodynamic system diagram of the 2 nd principle of a combined cycle power plant provided in accordance with the present invention.
FIG. 3 is a schematic thermodynamic system diagram of the 3 rd principle of a combined cycle power plant provided in accordance with the present invention.
FIG. 4 is a diagram of a 4 th principal thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
FIG. 5 is a diagram of a 5 th principal thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
FIG. 6 is a 6 th principal thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 7 is a 7 th principle thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 8 is a diagram of an 8 th principle thermodynamic system of a combined cycle power plant provided in accordance with the present invention.
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.
FIG. 13 is a 13 th principal thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 14 is a 14 th principle thermodynamic system diagram of a combined cycle power plant provided in accordance with the present invention.
FIG. 15 is a diagram of a 15 th principal thermodynamic system of a combined cycle power plant provided in accordance with the present invention and considering the recovery of the cooling load of an internal combustion engine.
In the figure, 1-diffuser pipe, 2-expander, 3-spray pipe, 4-second expander, 5-circulating pump, 6-high temperature heat exchanger, 7-condenser, 8-mixed evaporator, 9-internal combustion engine, 10-expansion speed increaser, 11-compressor, 12-heat regenerator, 13-mixed heat regenerator, 14-second circulating pump, 15-preheater, 16-intermediate reheater; a-a newly-added compressor, B-a newly-added high-temperature heat exchanger, C-a newly-added dual-energy compressor, D-a newly-added diffuser pipe, E-a newly-added expansion machine, F-a newly-added expansion speed increasing machine, G-a newly-added circulating pump and H-a newly-added superheater.
In order to clearly understand the content and essence of the present invention, the following descriptions will be made for the dual energy compressor, the expansion speed increaser and the expander:
(1) the expansion speed-increasing machine-under a certain pressure drop, it can implement double functions of pressure-reducing work-making and pressure-reducing speed-increasing, and is a combination body of expansion machine and jet tube or other equipment with identical function.
(2) The dual-energy compressor, a device for increasing the pressure of fluid by using the external mechanical energy and the kinetic energy of the fluid, is a combination of the compressor and a diffuser pipe or other devices with the same function.
(3) The second expander 4 in fig. 1 and the expander 2 in fig. 2 to 15 convert the thermal energy of the steam into mechanical energy (pressure reduction work) and also convert the kinetic energy of the steam into mechanical energy (speed reduction work), which is different from the function of a general expander.
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 a diffuser pipe, an expander, a spray pipe, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator and an internal combustion engine; the condenser 7 is provided with a condensate pipeline which is communicated with a mixing evaporator 8 through a circulating pump 5, the expander 2 is provided with a steam channel which is communicated with the mixing evaporator 8 through a spray pipe 3, the mixing evaporator 8 is also provided with a steam channel which is respectively communicated with a diffuser pipe 1 and a second expander 4, the diffuser pipe 1 is also provided with a steam channel which is communicated with the expander 2 through a high-temperature heat exchanger 6, and the second expander 4 is also provided with a steam channel which is communicated with the condenser 7; an air channel is arranged outside and communicated with an internal combustion engine 9, a fuel channel is arranged outside and communicated with the internal combustion engine 9, the internal combustion engine 9 and a fuel gas channel are communicated with the outside through a high-temperature heat exchanger 6, the internal combustion engine 9 and a cooling medium channel are communicated with the outside, a condenser 7 and a cooling medium channel are communicated with the outside, a mixing evaporator 8 and a heat medium channel are communicated with the outside, and the expander 2, the second expander 4 and the internal combustion engine 9 are connected with the outside and output power.
(2) In the process, the condensate of the condenser 7 is boosted by the circulating pump 5 and enters the mixing evaporator 8, the condensate is mixed with the steam from the spray pipe 3 and is vaporized after absorbing the heat load provided by the external heat medium, the saturated or superheated steam released by the mixing evaporator 8 respectively enters the diffuser pipe 1 to be boosted and heated and is decelerated and enters the second expander 4 to be depressurized, work done and decelerated; steam discharged by the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, flows through the expander 2 to reduce pressure and do work, flows through the spray pipe 3 to reduce pressure, reduce temperature and increase speed, and then enters the mixing evaporator 8 to release heat and reduce temperature; the steam discharged by the second expander 4 enters a condenser 7, releases heat to a cooling medium and is condensed; external fuel and air enter the internal combustion engine 9, a series of processes including combustion and expansion are completed in a cylinder of the internal combustion engine 9, fuel gas discharged by the internal combustion engine 9 flows through the high-temperature heat exchanger 6 and releases heat, and external cooling medium flows through the internal combustion engine 9 and is discharged outside after absorbing heat; the fuel provides driving heat load through combustion, the heat medium, namely the fuel gas after flowing through the high-temperature heat exchanger 6, other heat sources or heat source media capable of providing heat load, provides driving heat load through the mixing evaporator 8, the cooling medium takes away the low-temperature heat load through the condenser 7, and the expander 2, the second expander 4 and the internal combustion engine 9 jointly provide power to 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 a diffuser pipe, an expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixing evaporator, an internal combustion engine and an expansion speed increaser; the condenser 7 is provided with a condensate pipeline which is communicated with the mixing evaporator 8 through a circulating pump 5, the expansion speed increasing machine 10 is provided with a steam channel which is communicated with the mixing evaporator 8, the mixing evaporator 8 is also provided with a steam channel which is respectively communicated with the diffuser pipe 1 and the expander 2, the diffuser pipe 1 is also provided with a steam channel which is communicated with the expansion speed increasing machine 10 through a high-temperature heat exchanger 6, and the expander 2 is also provided with a steam channel which is communicated with the condenser 7; an air channel is arranged outside and communicated with an internal combustion engine 9, a fuel channel is arranged outside and communicated with the internal combustion engine 9, the internal combustion engine 9 and a fuel gas channel are communicated with the outside through a high-temperature heat exchanger 6, the internal combustion engine 9 and a cooling medium channel are communicated with the outside, a condenser 7 and a cooling medium channel are communicated with the outside, a mixing evaporator 8 and a heat medium channel are communicated with the outside, and an expander 2, the internal combustion engine 9 and an expansion speed increaser 10 are connected with the outside and output power.
(2) In the process, the condensate of the condenser 7 is boosted by the circulating pump 5 and enters the mixing evaporator 8, the condensate is mixed with the steam from the expansion speed increaser 10 and is vaporized after absorbing the heat load provided by the external heat medium, the saturated or superheated steam released by the mixing evaporator 8 respectively enters the diffuser pipe 1 to be boosted and heated and is decelerated and enters the expander 2 to be decompressed and work and decelerated; the steam discharged by the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, flows through the expansion speed increaser 10 to reduce pressure and do work and reduce pressure and increase speed, and then enters the mixing evaporator 8 to release heat and reduce temperature; the steam discharged by the expander 2 enters the condenser 7, releases heat to the cooling medium and is condensed; external fuel and air enter the internal combustion engine 9, a series of processes including combustion and expansion are completed in a cylinder of the internal combustion engine 9, fuel gas discharged by the internal combustion engine 9 flows through the high-temperature heat exchanger 6 and releases heat, and external cooling medium flows through the internal combustion engine 9 and is discharged outside after absorbing heat; the fuel provides driving heat load through combustion, the heat medium, namely fuel gas after flowing through the high-temperature heat exchanger 6, other heat sources or heat source media capable of providing heat load, provides driving heat load through the mixing evaporator 8, the cooling medium takes away low-temperature heat load through the condenser 7, and the expander 2, the internal combustion engine 9 and the expansion speed increaser 10 jointly provide power to 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 a diffuser pipe, an expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixing evaporator, an internal combustion engine, an expansion speed increaser and a compressor; the condenser 7 is provided with a condensate pipeline which is communicated with the mixing evaporator 8 through a circulating pump 5, the expansion speed increasing machine 10 is provided with a steam channel which is communicated with the mixing evaporator 8, the mixing evaporator 8 is also provided with a steam channel which is respectively communicated with the diffuser pipe 1 and the expander 2, the diffuser pipe 1 is also provided with a steam channel which is communicated with the expansion speed increasing machine 10 through a high-temperature heat exchanger 6, and the expander 2 is also provided with a steam channel which is communicated with the condenser 7; an air channel is arranged outside and communicated with an internal combustion engine 9, a gaseous fuel channel is arranged outside and communicated with the internal combustion engine 9 through a compressor 11, the internal combustion engine 9 and a fuel gas channel are communicated with the outside through a high-temperature heat exchanger 6, the internal combustion engine 9 and a cooling medium channel are communicated with the outside, a condenser 7 and a cooling medium channel are communicated with the outside, a mixing evaporator 8 and a heat medium channel are communicated with the outside, the internal combustion engine 9 is connected with the compressor 11 and transmits power, and an expander 2, the internal combustion engine 9 and an expansion speed increaser 10 are connected with the outside and output power.
(2) In the process, the condensate of the condenser 7 is boosted by the circulating pump 5 and enters the mixing evaporator 8, the condensate is mixed with the steam from the expansion speed increaser 10 and is vaporized after absorbing the heat load provided by the external heat medium, the saturated or superheated steam released by the mixing evaporator 8 respectively enters the diffuser pipe 1 to be boosted and heated and is decelerated and enters the expander 2 to be decompressed and work and decelerated; the steam discharged by the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, flows through the expansion speed increaser 10 to reduce pressure and do work and reduce pressure and increase speed, and then enters the mixing evaporator 8 to release heat and reduce temperature; the steam discharged by the expander 2 enters the condenser 7, releases heat to the cooling medium and is condensed; the external air enters the internal combustion engine 9, the external gaseous fuel enters the internal combustion engine 9 after being pressurized by the compressor 11, the air and the fuel complete a series of processes including combustion and expansion in a cylinder of the internal combustion engine 9, the fuel gas discharged by the internal combustion engine 9 flows through the high-temperature heat exchanger 6 and releases heat, and the external cooling medium flows through the internal combustion engine 9 and discharges the external cooling medium after absorbing heat; the fuel provides driving heat load through combustion, the heat medium-fuel gas after flowing through the high temperature heat exchanger 6, other heat sources or heat source media capable of providing heat load-provide driving heat load through the mixing evaporator 8, the cooling medium takes away low temperature heat load through the condenser 7, a part of work output by the internal combustion engine 9 or the expansion speed increasing machine 10 is provided for the compressor 11 as power, and the expander 2, the internal combustion engine 9 and the expansion speed increasing machine 10 provide power for the outside together to form a combined cycle power device.
The combined cycle power plant shown in fig. 4 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a newly added compressor and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe 1 is communicated with an expansion speed increaser 10 through the high-temperature heat exchanger 6 and adjusted to be that the steam channel of the diffuser pipe 1 is communicated with the newly added compressor A through the high-temperature heat exchanger 6, the steam channel of the newly added compressor A is communicated with the expansion speed increaser 10 through the newly added high-temperature heat exchanger B, a gas channel of an internal combustion engine 9 is communicated with the outside through the high-temperature heat exchanger 6 and adjusted to be that the gas channel of the internal combustion engine 9 is communicated with the outside through the newly added high-temperature heat exchanger B and the high-temperature heat exchanger 6, and the.
(2) Compared with the circulation flow of the combined cycle power plant shown in FIG. 2, the difference is that the steam discharged from the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, and then enters the newly-added compressor A to increase the pressure and the temperature; the steam discharged by the newly added compressor A flows through the newly added high-temperature heat exchanger B and absorbs heat, and then enters the expansion speed increaser 10 to reduce pressure and do work and reduce pressure and increase speed; the gas discharged by the internal combustion engine 9 flows through the newly-added high-temperature heat exchanger B and the high-temperature heat exchanger 6 to gradually release heat and is discharged to the outside, and the expansion speed increaser 10 provides power for the newly-added compressor A to form a combined cycle power device.
The combined cycle power plant shown in fig. 5 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a newly added dual-energy compressor and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe 1 is communicated with an expansion speed increaser 10 through a high-temperature heat exchanger 6 and adjusted to be that the steam channel of the diffuser pipe 1 is communicated with the newly added dual-energy compressor C through the high-temperature heat exchanger 6, the steam channel of the newly added dual-energy compressor C is communicated with the expansion speed increaser 10 through a newly added high-temperature heat exchanger B, a gas channel of an internal combustion engine 9 is communicated with the outside through the high-temperature heat exchanger 6 and adjusted to be that the gas channel of the internal combustion engine 9 is communicated with the outside through the newly added high-temperature heat exchanger B and the high-temperature heat exchanger 6, and the.
(2) Compared with the circulation flow of the combined cycle power plant shown in FIG. 2, the difference is that the steam discharged from the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, and then enters the newly-added dual-energy compressor C to increase the pressure, raise the temperature and reduce the speed; the steam discharged by the newly added double-energy compressor C flows through the newly added high-temperature heat exchanger B and absorbs heat, and then enters the expansion speed increaser 10 to reduce pressure, do work and reduce pressure and increase speed; the gas discharged by the internal combustion engine 9 flows through the newly-added high-temperature heat exchanger B and the high-temperature heat exchanger 6 to gradually release heat and is discharged outwards, and the expansion speed increaser 10 provides power for the newly-added dual-energy compressor C to form a combined cycle power device.
The combined cycle power plant shown in fig. 6 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a newly added diffuser pipe and a newly added high temperature heat exchanger are added, a steam channel of the diffuser pipe 1 is communicated with the expansion speed increaser 10 through the high temperature heat exchanger 6 and adjusted to be that the diffuser pipe 1 is communicated with a steam channel of the newly added diffuser pipe D through the high temperature heat exchanger 6, the newly added diffuser pipe D is communicated with the expansion speed increaser 10 through a steam channel of the newly added high temperature heat exchanger B, and an internal combustion engine 9 is communicated with the outside through a gas channel of the internal combustion engine 9 and adjusted to be that the internal combustion engine 9 is communicated with the outside through the newly added high temperature heat exchanger B and the high temperature heat exchanger.
(2) Compared with the circulation flow of the combined cycle power plant shown in FIG. 2, the difference in the flow is that the steam discharged from the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, and then enters the newly added diffuser pipe D to increase the pressure, raise the temperature and reduce the speed; the steam discharged by the newly-increased diffuser pipe D flows through the newly-increased high-temperature heat exchanger B and absorbs heat, and then enters the expansion speed increaser 10 to reduce the pressure and do work and reduce the pressure and increase the speed; the gas discharged by the internal combustion engine 9 flows through the newly-added high-temperature heat exchanger B and the high-temperature heat exchanger 6 to gradually release heat and is discharged to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 7 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a new expansion machine and a new high-temperature heat exchanger are added, a steam channel of a diffuser pipe 1 is communicated with an expansion speed increaser 10 through a high-temperature heat exchanger 6 and is adjusted to be communicated with the expansion speed increaser E through the high-temperature heat exchanger 6, a steam channel of the new expansion machine E is communicated with the expansion speed increaser 10 through a new high-temperature heat exchanger B, a gas channel of an internal combustion engine 9 is communicated with the outside through the high-temperature heat exchanger 6 and is adjusted to be communicated with the gas channel of the internal combustion engine 9 through the new high-temperature heat exchanger B and the high-temperature heat exchanger 6 and is communicated with the outside, and the new expansion machine E is connected with the.
(2) Compared with the circulation flow of the combined cycle power plant shown in FIG. 2, the difference is that the steam discharged from the diffuser pipe 1 flows through the high temperature heat exchanger 6 and absorbs heat, and then enters the new expansion machine E to reduce the pressure and do work; the steam discharged by the newly-added expander E flows through the newly-added high-temperature heat exchanger B and absorbs heat, and then enters the expansion speed increaser 10 to reduce the pressure and do work and reduce the pressure and increase the speed; the gas discharged by the internal combustion engine 9 is gradually released and discharged through the newly added high-temperature heat exchanger B and the high-temperature heat exchanger 6, and the work output by the newly added expansion machine E is output outwards to form a combined cycle power device.
The combined cycle power plant shown in fig. 8 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a newly added expansion speed increaser and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe 1 is communicated with an expansion speed increaser 10 through a high-temperature heat exchanger 6 and is adjusted to be communicated with the newly added expansion speed increaser F through the high-temperature heat exchanger 6, a steam channel of the newly added expansion speed increaser F is communicated with the expansion speed increaser 10 through a newly added high-temperature heat exchanger B, a gas channel of an internal combustion engine 9 is communicated with the outside through the high-temperature heat exchanger 6 and is adjusted to be communicated with the outside through the gas channel of the internal combustion engine 9 through the newly added high-temperature heat exchanger B and the high-temperature heat exchanger 6, and the newly added expansion speed increaser.
(2) Compared with the circulation flow of the combined cycle power plant shown in fig. 2, the difference in the flow is that the steam discharged from the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, and then enters the newly-added expansion speed increaser F to reduce the pressure and do work and increase the pressure and speed; the steam discharged by the newly-added expansion speed increaser F flows through the newly-added high-temperature heat exchanger B and absorbs heat, and then enters the expansion speed increaser 10 to reduce the pressure and do work and reduce the pressure and increase the speed; the gas discharged by the internal combustion engine 9 flows through the newly added high-temperature heat exchanger B and the high-temperature heat exchanger 6 to gradually release heat and is discharged outwards, and the work output by the newly added expansion speed increaser F is output outwards 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. 2, a spray pipe and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe 1 is communicated with an expansion speed increaser 10 through the high-temperature heat exchanger 6 and adjusted to be that the diffuser pipe 1 is communicated with the steam channel through the high-temperature heat exchanger 6 and the spray pipe 3, the spray pipe 3 is communicated with the expansion speed increaser 10 through a newly added high-temperature heat exchanger B, and an internal combustion engine 9 is communicated with the outside through the high-temperature heat exchanger 6 and adjusted to be that the internal combustion engine 9 is communicated with the outside through the newly added high-temperature heat exchanger B and the high-temperature heat.
(2) Compared with the circulation flow of the combined cycle power plant shown in FIG. 2, the difference is that the steam discharged from the diffuser pipe 1 flows through the high-temperature heat exchanger 6 and absorbs heat, and then enters the spray pipe 3 to be depressurized and accelerated; the steam discharged by the spray pipe 3 flows through the newly-added high-temperature heat exchanger B and absorbs heat, and then enters the expansion speed increaser 10 to reduce the pressure and do work and reduce the pressure and increase the speed; the gas discharged by the internal combustion engine 9 flows through the newly-added high-temperature heat exchanger B and the high-temperature heat exchanger 6 to gradually release heat and is discharged to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 10 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a heat regenerator is added, a steam channel of the diffuser pipe 1 is communicated with the expansion speed increaser 10 through the high-temperature heat exchanger 6 and adjusted to be that the steam channel of the diffuser pipe 1 is communicated with the expansion speed increaser 10 through the heat regenerator 12 and the high-temperature heat exchanger 6, and the steam channel of the expansion speed increaser 10 is communicated with the mixed evaporator 8 and adjusted to be that the steam channel of the expansion speed increaser 10 is communicated with the mixed evaporator 8 through the heat regenerator 12.
(2) Compared with the circulation flow of the combined cycle power plant shown in fig. 2, the difference in the flow is that the steam discharged from the diffuser pipe 1 flows through the heat regenerator 12 and the high temperature heat exchanger 6 and gradually absorbs heat, flows through the expansion speed increaser 10 to reduce pressure and work and reduce pressure and increase speed, flows through the heat regenerator 12 to release heat, and then enters the hybrid evaporator 8 to form the combined cycle power plant.
The combined cycle power plant shown in FIG. 11 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a heat regenerator, a newly added diffuser pipe and a newly added high temperature heat exchanger are added, a steam channel of the diffuser pipe 1 is communicated with the expansion speed increaser 10 through the high temperature heat exchanger 6 and adjusted to be that the steam channel of the diffuser pipe 1 is communicated with the newly added diffuser pipe D through the heat regenerator 12 and the high temperature heat exchanger 6, the steam channel of the newly added diffuser pipe D is communicated with the expansion speed increaser 10 through the newly added high temperature heat exchanger B, the steam channel of the expansion speed increaser 10 is communicated with the mixed evaporator 8 through the heat regenerator 12 and adjusted to be that the steam channel of the expansion speed increaser 10 is communicated with the mixed evaporator 8 through the high temperature heat exchanger 6, and a gas channel of the internal combustion engine 9 is communicated with the outside through the high temperature heat exchanger 6 and adjusted to be that the gas channel of the internal.
(2) Compared with the circulation flow of the combined cycle power plant shown in fig. 2, the difference in the flow is that the steam discharged from the diffuser pipe 1 flows through the heat regenerator 12 and the high-temperature heat exchanger 6 and gradually absorbs heat, and then enters the newly added diffuser pipe D to increase the pressure, raise the temperature and reduce the speed; the steam discharged by the newly added diffuser pipe D flows through the newly added high-temperature heat exchanger B and absorbs heat, flows through the expansion speed increaser 10 to reduce pressure and do work and reduce pressure and increase speed, flows through the heat regenerator 12 and releases heat, and then enters the mixing evaporator 8; the gas discharged by the internal combustion engine 9 flows through the newly-added high-temperature heat exchanger B and the high-temperature heat exchanger 6 to gradually release heat and is discharged to the outside, so that a combined cycle power device is formed.
The combined cycle power plant shown in fig. 12 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a mixed heat regenerator and a second circulating pump are added, a condensate pipeline of a condenser 7 is communicated with a mixed evaporator 8 through a circulating pump 5, the condenser 7 is adjusted to be communicated with the mixed heat regenerator 13 through the circulating pump 5, a steam extraction channel is additionally arranged on an expander 2 and is communicated with the mixed heat regenerator 13, and the mixed heat regenerator 13 is communicated with the mixed evaporator 8 through a condensate pipeline of the second circulating pump 14.
(2) Compared with the circulation flow of the combined cycle power device shown in fig. 2, the difference in the flow is that the condensate of the condenser 7 flows through the circulation pump 5 and enters the hybrid heat regenerator 13 after being boosted, the steam entering the expander 2 is decompressed and works to a certain pressure and then is divided into two paths, the first path continues to be decompressed and works and enters the condenser 7 after being decelerated, the second path enters the hybrid heat regenerator 13 through the steam extraction channel to be mixed with the condensate for heat release and condensation, and the condensate of the hybrid heat regenerator 13 enters the hybrid evaporator 8 after being boosted by the second circulation pump 14 to form the combined cycle power device.
The combined cycle power plant shown in fig. 13 is implemented as follows:
in the combined cycle power plant shown in fig. 2, a preheater is added, and a condensate pipeline of the condenser 7 is communicated with the mixing evaporator 8 through the circulating pump 5, so that the condensate pipeline of the condenser 7 is communicated with the mixing evaporator 8 through the circulating pump 5 and the preheater 15, and the preheater 15 is also communicated with the outside through a heat medium channel; the condensate of the condenser 7 enters the mixing evaporator 8 after being boosted by the circulating pump 5 and heated by the preheater 15, thus forming the combined cycle power plant.
The combined cycle power plant shown in fig. 14 is implemented as follows:
in the combined cycle power plant shown in fig. 2, an intermediate reheater is added, and the hybrid evaporator 8 having a steam passage communicating with the expander 2 and the expander 2 having a steam passage communicating with the condenser 7 are adjusted such that the hybrid evaporator 8 having a steam passage communicating with the expander 2, the expander 2 having an intermediate reheated steam passage communicating with the expander 2 via the intermediate reheater 16 and the expander 2 having a steam passage communicating with the condenser 7, and the intermediate reheater 16 having a heat medium passage communicating with the outside; when the steam entering the expansion machine 2 is decompressed and does work to a certain pressure, the steam is completely led out and flows through the intermediate reheated steam channel to flow through the intermediate reheater 16 to absorb heat and raise temperature, then enters the expansion machine 2 to be continuously decompressed and does work and reduce speed, and then enters the condenser 7 to release heat and condense to form the combined cycle power device.
The combined cycle power plant shown in fig. 15 is implemented as follows:
(1) structurally, in the combined cycle power plant shown in fig. 2, a cooling medium channel of the internal combustion engine 9 communicated with the outside is cancelled, a newly added circulating pump and a newly added superheater are added, a condensate pipeline is additionally arranged on the condenser 7, the condensate pipeline is communicated with the internal combustion engine 9 through the newly added circulating pump G, then a steam channel of the internal combustion engine 9 is communicated with the expander 2 through the newly added superheater H, and a heat medium channel of the newly added superheater H is communicated with the outside.
(2) Compared with the circulation flow of the combined cycle power plant shown in fig. 2, the difference in the flow is that one path of condensate of the condenser 7 is boosted by the newly added circulation pump G and then supplied to the internal combustion engine 9 as circulating coolant, is vaporized by heat absorption, enters the expansion machine 2 after being heated by the newly added superheater H by heat absorption and then is depressurized and does work, and the heat medium, namely fuel gas discharged by the internal combustion engine 9 or other heat source media, provides heat load to the newly added superheater H to form the combined cycle power plant.
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 diffuser pipe replaces a main compressor, and the manufacturing difficulty and the manufacturing cost of the combined cycle power device are greatly reduced.
(2) The expansion speed increaser replaces a main expansion machine, so that the manufacturing difficulty and the manufacturing cost of the combined cycle power device are greatly reduced.
(3) The jet pipe or the expansion speed increaser replaces a common expansion machine, so that the manufacturing difficulty and the manufacturing cost of the combined cycle power device are effectively reduced.
(4) The diffuser pipe or the dual-energy compressor replaces a common compressor, and the manufacturing difficulty and the manufacturing cost of the combined cycle power device are effectively reduced.
(5) Simple components replace complex components, which is beneficial to maintaining or improving the thermal efficiency of the combined cycle power plant.
(6) The complex parts are replaced by simple parts and simplified, which is beneficial to improving the safety and service life of the dynamic parts.
(7) A plurality of specific technical schemes are provided, and the device can be used for coping with a plurality of different actual conditions and has a wider application range.
(8) The combined cycle power plant technology is expanded, the types of the combined cycle power plant are enriched, the conversion of heat energy into mechanical energy is favorably realized, and the application range of the combined cycle power plant is expanded.

Claims (21)

1. The combined cycle power device mainly comprises a diffuser pipe, an expander, a spray pipe, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator and an internal combustion engine; the condenser (7) is provided with a condensate pipeline which is communicated with the mixing evaporator (8) through a circulating pump (5), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (8) through a spray pipe (3), the mixing evaporator (8) is also provided with a steam channel which is respectively communicated with the diffuser pipe (1) and the second expander (4), the diffuser pipe (1) is also provided with a steam channel which is communicated with the expander (2) through a high-temperature heat exchanger (6), and the second expander (4) is also provided with a steam channel which is communicated with the condenser (7); an air channel is arranged outside and communicated with an internal combustion engine (9), a fuel channel is arranged outside and communicated with the internal combustion engine (9), a fuel gas channel is arranged inside the internal combustion engine (9) and communicated with the outside through a high-temperature heat exchanger (6), a cooling medium channel is arranged inside the internal combustion engine (9) and communicated with the outside, a cooling medium channel is arranged inside a condenser (7) and communicated with the outside, a mixing evaporator (8) or a heat medium channel is communicated with the outside, and an expander (2), a second expander (4) and the internal combustion engine (9) are connected with the outside and output power to form a combined cycle power device.
2. The combined cycle power device mainly comprises a diffuser pipe, an expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, an internal combustion engine and an expansion speed increaser; the condenser (7) is provided with a condensate pipeline which is communicated with the mixing evaporator (8) through a circulating pump (5), the expansion speed increaser (10) is provided with a steam channel which is communicated with the mixing evaporator (8), the mixing evaporator (8) is also provided with a steam channel which is respectively communicated with the diffuser pipe (1) and the expander (2), the diffuser pipe (1) is also provided with a steam channel which is communicated with the expansion speed increaser (10) through a high-temperature heat exchanger (6), and the expander (2) is also provided with a steam channel which is communicated with the condenser (7); the external part is provided with an air channel communicated with the internal combustion engine (9), the external part is also provided with a fuel channel communicated with the internal combustion engine (9), the internal combustion engine (9) is also provided with a fuel gas channel communicated with the external part through a high-temperature heat exchanger (6), the internal combustion engine (9) is also provided with a cooling medium channel communicated with the external part, the condenser (7) is also provided with a cooling medium channel communicated with the external part, the mixing evaporator (8) or the heating medium channel is also communicated with the external part, and the expander (2), the internal combustion engine (9) and the expansion speed increaser (10) are connected with the external part and output power.
3. The combined cycle power device mainly comprises a diffuser pipe, an expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, an internal combustion engine, an expansion speed increaser and a compressor; the condenser (7) is provided with a condensate pipeline which is communicated with the mixing evaporator (8) through a circulating pump (5), the expansion speed increaser (10) is provided with a steam channel which is communicated with the mixing evaporator (8), the mixing evaporator (8) is also provided with a steam channel which is respectively communicated with the diffuser pipe (1) and the expander (2), the diffuser pipe (1) is also provided with a steam channel which is communicated with the expansion speed increaser (10) through a high-temperature heat exchanger (6), and the expander (2) is also provided with a steam channel which is communicated with the condenser (7); the external part is provided with an air channel communicated with an internal combustion engine (9), the external part is also provided with a gaseous fuel channel communicated with the internal combustion engine (9) through a compressor (11), the internal combustion engine (9) is also provided with a fuel gas channel communicated with the external part through a high-temperature heat exchanger (6), the internal combustion engine (9) is also provided with a cooling medium channel communicated with the external part, a condenser (7) is also provided with a cooling medium channel communicated with the external part, a mixing evaporator (8) or a heat medium channel is communicated with the external part, the internal combustion engine (9) is connected with the compressor (11) and transmits power, and an expander (2), the internal combustion engine (9) and an expansion speed increaser (10) are connected with the.
4. A combined cycle power plant as claimed in any one of claims 2 to 3, a newly-added compressor and a newly-added high-temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high-temperature heat exchanger (6) and adjusted to be that the steam channel of the diffuser pipe (1) is communicated with the newly-added compressor (A) through the high-temperature heat exchanger (6), the steam channel of the newly-added compressor (A) is communicated with the expansion speed increaser (10) through the newly-added high-temperature heat exchanger (B), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be that the gas channel of the internal combustion engine (9) is communicated with the outside through the newly-added high-temperature heat exchanger (B) and the high-temperature heat exchanger (6), and the expansion speed increaser (10) is connected.
5. A combined cycle power device is characterized in that a newly added dual-energy compressor and a newly added high-temperature heat exchanger are added in any combined cycle power device of claims 2-3, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high-temperature heat exchanger (6) and adjusted to be communicated with a newly added dual-energy compressor (C) through the high-temperature heat exchanger (6) and the steam channel of the newly added dual-energy compressor (C) is communicated with the expansion speed increaser (10) through the newly added high-temperature heat exchanger (B), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be communicated with the outside through the newly added high-temperature heat exchanger (B) and the high-temperature heat exchanger (6), and the expansion speed increaser (10) is connected with the newly added dual-energy compressor (C) and transmits power, forming a combined cycle power plant.
6. A combined cycle power device is characterized in that a newly added diffuser pipe and a newly added high-temperature heat exchanger are added in any combined cycle power device of claims 2-3, a steam channel of the diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high-temperature heat exchanger (6) and is adjusted to be communicated with a newly added diffuser pipe (D) through the high-temperature heat exchanger (6) and a steam channel of the newly added diffuser pipe (D) is communicated with the expansion speed increaser (10) through a newly added high-temperature heat exchanger (B), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and is adjusted to be communicated with the outside through the gas channel of the internal combustion engine (9) and the newly added high-temperature heat exchanger (B) and the high-temperature heat exchanger (6), and the combined cycle power device is formed.
7. A combined cycle power plant as claimed in any one of claims 2 to 3, a new expansion machine and a new high-temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increasing machine (10) through a high-temperature heat exchanger (6) and adjusted to be that the steam channel of the diffuser pipe (1) is communicated with a new expansion machine (E) through the high-temperature heat exchanger (6), the steam channel of the new expansion machine (E) is communicated with the expansion speed increasing machine (10) through a new high-temperature heat exchanger (B), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be that the gas channel of the internal combustion engine (9) is communicated with the outside through the new high-temperature heat exchanger (B) and the high-temperature heat exchanger (6), and the new expansion machine (E) is connected with the outside and transmits power to form a combined cycle.
8. A combined cycle power plant as claimed in any one of claims 2 to 3, a newly-added expansion speed increaser and a newly-added high-temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high-temperature heat exchanger (6) and adjusted to be communicated with the newly-added expansion speed increaser (F) through the high-temperature heat exchanger (6), a steam channel of the newly-added expansion speed increaser (F) is communicated with the expansion speed increaser (10) through a newly-added high-temperature heat exchanger (B), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be communicated with the outside through the newly-added high-temperature heat exchanger (B) and the high-temperature heat exchanger (6), and the newly-added expansion speed increaser (F) is connected with the outside and transmits power to form a combined cycle power device.
9. A combined cycle power device is characterized in that a spray pipe and a newly-increased high-temperature heat exchanger are added in any combined cycle power device according to claims 2-3, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high-temperature heat exchanger (6) and adjusted to be communicated with the spray pipe (3) through the high-temperature heat exchanger (6) and the steam channel of the diffuser pipe (1), a steam channel of the spray pipe (3) is communicated with the expansion speed increaser (10) through a newly-increased high-temperature heat exchanger (B), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be communicated with the outside through the newly-increased high-temperature heat exchanger (B) and the high-temperature heat exchanger (6) and formed into the combined cycle power device.
10. A combined cycle power device is characterized in that a heat regenerator is added in any combined cycle power device according to claims 2-3, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high-temperature heat exchanger (6) and adjusted to be that the diffuser pipe (1) is provided with a steam channel which is communicated with the expansion speed increaser (10) through the heat regenerator (12) and the high-temperature heat exchanger (6), the expansion speed increaser (10) is provided with a steam channel which is communicated with a hybrid evaporator (8) and adjusted to be that the expansion speed increaser (10) is provided with a steam channel which is communicated with the hybrid evaporator (8) through the heat regenerator (12), and the combined cycle power device is formed.
11. A combined cycle power plant, in any one of the combined cycle power plants of claims 2-3, a heat regenerator, a newly-increased compressor and a newly-increased high temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through a high temperature heat exchanger (6) and is adjusted to be that the diffuser pipe (1) is provided with a steam channel which is communicated with the newly-increased compressor (A) through the heat regenerator (12) and the high temperature heat exchanger (6), the newly-increased compressor (A) is provided with a steam channel which is communicated with the expansion speed increaser (10) through the newly-increased high temperature heat exchanger (B), the expansion speed increaser (10) is provided with a steam channel which is communicated with a hybrid evaporator (8) through the heat regenerator (12) and is adjusted to be that the expansion speed increaser (10) is provided with a steam channel which is communicated with the hybrid evaporator (8), a gas channel of an internal combustion engine (9) is provided with a gas channel which is communicated with the outside through the high temperature heat exchanger The exchanger (6) is communicated with the outside, and the expansion speed increaser (10) is connected with the newly-increased compressor (A) and transmits power to form a combined cycle power device.
12. A combined cycle power plant, in any one of the combined cycle power plants of claims 2-3, a heat regenerator, a newly added dual-energy compressor and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through the high-temperature heat exchanger (6) and adjusted to be that the diffuser pipe (1) is provided with a steam channel which is communicated with the newly added dual-energy compressor (C) through the heat regenerator (12) and the high-temperature heat exchanger (6), the newly added dual-energy compressor (C) is provided with a steam channel which is communicated with the expansion speed increaser (10) through the newly added high-temperature heat exchanger (B), the expansion speed increaser (10) is provided with a steam channel which is communicated with a mixing evaporator (8) through the heat regenerator (12), an internal combustion engine (9) is provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be that the internal combustion engine (9) is provided with a gas channel which is communicated with the newly added B) And the high-temperature heat exchanger (6) is communicated with the outside, and the expansion speed increaser (10) is connected with the newly-increased dual-energy compressor (C) and transmits power to form a combined cycle power device.
13. A combined cycle power plant, in any one of the combined cycle power plants of claims 2-3, a heat regenerator, a newly added diffuser pipe and a newly added high temperature heat exchanger are added, a steam channel of the diffuser pipe (1) is communicated with the expansion speed increaser (10) through the high temperature heat exchanger (6) and adjusted to be that the diffuser pipe (1) is provided with a steam channel which is communicated with the newly added diffuser pipe (D) through the heat regenerator (12) and the high temperature heat exchanger (6), the newly added diffuser pipe (D) is provided with a steam channel which is communicated with the expansion speed increaser (10) through the newly added high temperature heat exchanger (B), the expansion speed increaser (10) is provided with a steam channel which is communicated with the hybrid evaporator (8) through the expansion speed increaser (10) and adjusted to be that the expansion speed increaser (10) is provided with a steam channel which is communicated with the hybrid evaporator (8) through the heat regenerator (12), and a gas channel of the internal combustion engine (9) is provided with a gas channel which is communicated with the outside The exchanger (6) is communicated with the outside to form a combined cycle power device.
14. A combined cycle power plant, in any one of the combined cycle power plants of claims 2-3, a heat regenerator, a new expansion machine and a new high temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed-increasing machine (10) through a high temperature heat exchanger (6) and is adjusted to be that the diffuser pipe (1) is provided with a steam channel which is communicated with the new expansion machine (E) through the heat regenerator (12) and the high temperature heat exchanger (6), the new expansion machine (E) is provided with a steam channel which is communicated with the expansion speed-increasing machine (10) through the new high temperature heat exchanger (B), the expansion speed-increasing machine (10) is provided with a steam channel which is communicated with a hybrid evaporator (8) through the expansion speed-increasing machine (10) is adjusted to be that the expansion speed-increasing machine (10) is provided with a steam channel which is communicated with the hybrid evaporator (8) through the heat regenerator (12), and an internal combustion engine (9) is provided with a gas channel which is communicated with the outside through the high temperature heat exchanger (6) and the exchanger (6) is communicated with the outside, and the new expansion machine (E) is connected with the outside and transmits power to form a combined cycle power device.
15. A combined-cycle power plant, in any one of the combined-cycle power plants of claims 2-3, a heat regenerator, a newly added expansion speed increaser and a newly added high-temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with the expansion speed increaser (10) through the high-temperature heat exchanger (6) and adjusted to be that the diffuser pipe (1) is communicated with the newly added expansion speed increaser (F) through the heat regenerator (12) and the high-temperature heat exchanger (6), the newly added expansion speed increaser (F) is further communicated with the expansion speed increaser (10) through a newly added high-temperature heat exchanger (B), the expansion speed increaser (10) is communicated with a mixed evaporator (8) through a steam channel of the expansion speed increaser (10) is adjusted to be that the expansion speed increaser (10) is communicated with the mixed evaporator (8) through the heat regenerator (12), a gas channel of an internal combustion engine (9) is communicated with the outside through the high-temperature heat exchanger (6) and adjusted to be that the internal combustion B) And the high-temperature heat exchanger (6) is communicated with the outside, and the newly-added expansion speed increaser (F) is connected with the outside and transmits power to form a combined cycle power device.
16. A combined cycle power plant, in any one of the combined cycle power plants of claims 2-3, a regenerator, a nozzle and a newly-increased high temperature heat exchanger are added, a steam channel of a diffuser pipe (1) is communicated with an expansion speed increaser (10) through the high temperature heat exchanger (6) and is adjusted to be communicated with the nozzle (3) through the regenerator (12) and the high temperature heat exchanger (6) and the steam channel of the diffuser pipe (1), the nozzle (3) is communicated with the expansion speed increaser (10) through the newly-increased high temperature heat exchanger (B), the expansion speed increaser (10) is communicated with a hybrid evaporator (8) through the steam channel of the expansion speed increaser (10) and is adjusted to be communicated with the hybrid evaporator (8) through the regenerator (12), a gas channel of an internal combustion engine (9) is communicated with the outside through the high temperature heat exchanger (6) and is adjusted to be communicated with the internal combustion engine (9) through the newly-increased high temperature heat exchanger (B) and the high temperature heat exchanger (6) and is And communicating to form a combined cycle power plant.
17. A combined cycle power device is characterized in that a mixed heat regenerator and a second circulating pump are added in any combined cycle power device of claims 2 to 16, a condenser (7) is provided with a condensate pipeline which is communicated with a mixed evaporator (8) through a circulating pump (5) and is adjusted to be that the condenser (7) is provided with a condensate pipeline which is communicated with the mixed heat regenerator (13) through the circulating pump (5), an expander (2) is additionally provided with a steam extraction channel which is communicated with the mixed heat regenerator (13), and the mixed heat regenerator (13) is further provided with a condensate pipeline which is communicated with the mixed evaporator (8) through the second circulating pump (14) to form the combined cycle power device.
18. A combined cycle power plant, which is characterized in that a preheater is added in any combined cycle power plant of claims 2 to 16, a condenser (7) is provided with a condensate pipeline which is communicated with a mixing evaporator (8) through a circulating pump (5) and is adjusted to be that the condenser (7) is provided with a condensate pipeline which is communicated with the mixing evaporator (8) through the circulating pump (5) and the preheater (15), and the preheater (15) is also provided with a heat medium channel which is communicated with the outside, thus forming the combined cycle power plant.
19. A combined cycle power plant, wherein an intermediate reheater is added to any of the combined cycle power plants described in claims 2 to 16, the hybrid evaporator (8) having a steam passage communicating with the expander (2) and the expander (2) having a steam passage communicating with the condenser (7) is adjusted such that the hybrid evaporator (8) having a steam passage communicating with the expander (2), the expander (2) having an intermediate reheated steam passage communicating with the expander (2) through the intermediate reheater (16) and the expander (2) having a steam passage communicating with the condenser (7), and the intermediate reheater (16) and the heat medium passage communicating with the outside, thereby forming a combined cycle power plant.
20. A combined cycle power device is characterized in that in any combined cycle power device of claims 2-19, a cooling medium channel communicated with the outside of an internal combustion engine (9) is eliminated, a newly-added circulating pump is added, a condensate pipeline is additionally arranged on a condenser (7) and is communicated with the internal combustion engine (9) through the newly-added circulating pump (G), and then a steam channel of the internal combustion engine (9) is communicated with an expander (2) to form the combined cycle power device.
21. A combined cycle power device is characterized in that in any combined cycle power device of claims 2-19, a cooling medium channel communicated with the outside of an internal combustion engine (9) is eliminated, a newly-added circulating pump and a newly-added superheater are added, a condensate pipeline additionally arranged on a condenser (7) is communicated with the internal combustion engine (9) through the newly-added circulating pump (G), then a steam channel of the internal combustion engine (9) is communicated with an expander (2) through the newly-added superheater (H), and a heat medium channel of the newly-added superheater (H) is communicated with the outside to form the combined cycle power device.
CN201911130953.9A 2018-11-15 2019-11-09 Combined cycle power plant Pending CN111255535A (en)

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