CN110700903A - Single working medium combined cycle steam power device - Google Patents
Single working medium combined cycle steam power device Download PDFInfo
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- CN110700903A CN110700903A CN201910976875.8A CN201910976875A CN110700903A CN 110700903 A CN110700903 A CN 110700903A CN 201910976875 A CN201910976875 A CN 201910976875A CN 110700903 A CN110700903 A CN 110700903A
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- 238000004519 manufacturing process Methods 0.000 description 12
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01B23/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
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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
- F01K13/00—General layout or general methods of operation of complete plants
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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
- F01K13/00—General layout or general methods of operation of complete plants
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Abstract
The invention provides a single working medium combined cycle steam 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 expander 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 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 high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator is also provided with a heat source medium channel communicated with the outside, and the expander and the second expander are connected with the outside and output power, so that the single-working-medium combined cycle steam power device is formed.
Description
The technical field is as follows:
the invention belongs to the technical field of energy and power.
Background art:
the heat energy is converted into mechanical energy which is needed by human life and production; the single-working-medium combined-cycle steam power device adopting the combined-cycle principle to work has great significance in the field of dealing with the heat-variable power of non-high-quality fuel. The expander, compressor and heat exchanger are essential basic and core components from the viewpoint of the components constituting the single-working-medium combined-cycle steam power plant; the two core components of the compressor and the expander are difficult to manufacture, high in requirements on materials and high in manufacturing cost, and the application of the two core components is adversely affected. Therefore, the number of compressors or expanders should be reduced or replaced by simple components, which significantly reduces the manufacturing difficulty and cost of the single-working-medium combined-cycle steam power plant, and is beneficial to popularization and application.
The invention provides a single-working medium combined cycle steam power device which utilizes a diffuser pipe to replace a main compressor, and mainly aims to reduce the manufacturing difficulty and the manufacturing cost of the single-working medium combined cycle steam power device and keep or effectively improve the heat efficiency of the single-working medium combined cycle steam power device; wherein, also proposed and utilized the technical scheme of the nozzle to replace the non-main expander.
The invention content is as follows:
the invention mainly aims to provide a single-working-medium combined cycle steam power device adopting a diffuser pipe to replace a compressor, and the specific invention contents are set forth in the following items:
1. the single working medium combined cycle steam power device mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser and a mixed evaporator; 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, 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 high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, and the expander and the second expander are connected with the outside and output power to form a single-working-medium combined cycle steam power device; wherein, or the expander is connected with the circulating pump and transmits power.
2. The single working medium combined cycle steam power device mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, a heat regenerator and a second circulating pump; the condenser is provided with a condensate pipeline which is communicated with a heat regenerator through a circulating pump, the second expander is provided with a steam extraction channel which is communicated with the heat regenerator, the heat regenerator is also provided with a condensate pipeline which is communicated with a mixed evaporator through the second circulating pump, the expander is provided with a steam channel which is communicated with the mixed evaporator, the mixed evaporator is also provided with a steam channel which is respectively communicated with a diffuser pipe and the 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 high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, and the expander and the second expander are connected with the outside and output power to form a single-working-medium combined cycle steam power device; wherein, or the expander is connected with the circulating pump and the second circulating pump and transmits power.
3. The single working medium combined cycle steam power device mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator and a preheater; the condenser is provided with a condensate pipeline which is communicated with the mixing evaporator through a circulating pump and a preheater, the expander 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 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 high-temperature heat exchanger is also provided with a heat source medium channel communicated with the outside, the condenser is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator or the heat source medium channel is also communicated with the outside, the preheater is also provided with a heat source medium channel communicated with the outside, and the expander and the second expander are connected with the outside and output power to form a single-working-medium combined cycle steam power device; wherein, or the expander is connected with the circulating pump and transmits power.
4. A single working medium combined cycle steam power device is characterized in that any one of the single working medium combined cycle steam power devices 1-3 is additionally provided with a newly-added compressor and a newly-added high-temperature heat exchanger, a steam channel of a diffuser pipe is communicated with an expander through the high-temperature heat exchanger and adjusted to be communicated with the newly-added compressor through the high-temperature heat exchanger, the steam channel of the newly-added compressor is communicated with the expander through the newly-added high-temperature heat exchanger, the newly-added high-temperature heat exchanger is also communicated with the outside through a heat source medium channel, and the expander is connected with the newly-added compressor and transmits power to form the single working medium combined cycle steam power device.
5. A single working medium combined cycle steam power device is characterized in that a new expansion machine and a new increased high temperature heat exchanger are added in any single working medium combined cycle steam power device in items 1-3, a steam channel of a diffuser pipe is communicated with the expansion machine through the high temperature heat exchanger and adjusted to be communicated with the new expansion machine through the high temperature heat exchanger, a steam channel of the new expansion machine is communicated with the expansion machine through the new increased high temperature heat exchanger, the new increased high temperature heat exchanger is also communicated with the outside through a heat source medium channel, and the new expansion machine is connected with the outside and transmits power to form the single working medium combined cycle steam power device.
6. A single working medium combined cycle steam power device is characterized in that any one of the single working medium combined cycle steam power devices 1-3 is additionally provided with a newly-added diffuser pipe and a newly-added high-temperature heat exchanger, a steam channel arranged on the diffuser pipe is communicated with an expander through the high-temperature heat exchanger and adjusted to be communicated with the newly-added diffuser pipe through the high-temperature heat exchanger, a steam channel arranged on the newly-added diffuser pipe is communicated with the expander through the newly-added high-temperature heat exchanger, and a heat source medium channel arranged on the newly-added high-temperature heat exchanger is communicated with the outside, so that the single working medium combined cycle steam power device is formed.
7. A single working medium combined cycle steam power device is characterized in that any one of the single working medium combined cycle steam power devices 1-3 is additionally provided with a newly-added spray pipe and a newly-added high-temperature heat exchanger, a steam channel arranged on a diffuser pipe is communicated with an expander through the high-temperature heat exchanger and adjusted to be communicated with the newly-added spray pipe through the high-temperature heat exchanger, the steam channel arranged on the newly-added spray pipe is communicated with the expander through the newly-added high-temperature heat exchanger, and the newly-added high-temperature heat exchanger is also communicated with the outside through a heat source medium channel to form the single working medium combined cycle steam power device.
8. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator is added in any one of the single working medium combined cycle steam power devices in items 1-3, a steam channel arranged on a diffuser pipe is communicated with an expander through a high-temperature heat exchanger and adjusted to be communicated with the expander through the high-temperature heat regenerator and the high-temperature heat exchanger, a steam channel arranged on the expander is communicated with a mixed evaporator and adjusted to be communicated with the mixed evaporator through the steam channel arranged on the expander and the high-temperature heat exchanger, and thus the single working medium combined cycle steam power device is formed.
9. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-added compressor and a newly-added high-temperature heat exchanger are added in any one of the single working medium combined cycle steam power devices in items 1-3, a steam channel of a diffuser pipe is communicated with an expander through the high-temperature heat exchanger and adjusted to be communicated with the newly-added compressor through the high-temperature heat exchanger, a steam channel of the newly-added compressor is communicated with the expander through the newly-added high-temperature heat exchanger, a steam channel of the expander is communicated with a mixed evaporator through the high-temperature heat regenerator, the expander is adjusted to be communicated with the mixed evaporator through the steam channel of the expander, a heat source medium channel of the newly-added high-temperature heat exchanger is communicated with the outside, and the expander is connected with the newly-added compressor and transmits power to form the single working medium combined cycle.
10. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a new expansion machine and a new high-temperature heat exchanger are added in any one of the single working medium combined cycle steam power devices in items 1-3, a steam channel of a diffuser pipe is communicated with the expansion machine through the high-temperature heat exchanger and adjusted to be communicated with the new expansion machine through the high-temperature heat regenerator and the high-temperature heat exchanger, a steam channel of the new expansion machine is communicated with the expansion machine through the new high-temperature heat exchanger, a steam channel of the expansion machine is communicated with a mixed evaporator through the high-temperature heat regenerator, a steam channel of the expansion machine is adjusted to be communicated with the mixed evaporator through the high-temperature heat regenerator, a heat source medium channel of the new expansion machine is communicated with the outside, and the new expansion machine is connected with the outside and transmits power, so that the single working medium combined cycle.
11. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-increased diffuser pipe and a newly-increased high-temperature heat exchanger are added in any one of the single working medium combined cycle steam power devices in items 1-3, a steam channel of the diffuser pipe is communicated with an expander through the high-temperature heat exchanger and is adjusted to be communicated with the newly-increased diffuser pipe through the steam channel of the diffuser pipe, the steam channel of the newly-increased diffuser pipe is communicated with the expander through the newly-increased high-temperature heat exchanger, the steam channel of the expander is communicated with a mixed evaporator through the high-temperature heat regenerator, the steam channel of the expander is communicated with the mixed evaporator through the high-temperature heat regenerator, and the heat source medium channel of the newly-increased high-temperature heat exchanger is communicated with the outside to form the single working medium combined.
12. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-added spray pipe and a newly-added high-temperature heat exchanger are added in any one of the single working medium combined cycle steam power devices in items 1-3, a steam channel of a diffuser pipe is communicated with an expander through the high-temperature heat exchanger and is adjusted to be communicated with the newly-added spray pipe through the high-temperature heat regenerator and the high-temperature heat exchanger, the steam channel of the newly-added spray pipe is communicated with the expander through the newly-added high-temperature heat exchanger, the steam channel of the expander is communicated with a mixed evaporator through the high-temperature heat regenerator, the steam channel of the expander is adjusted to be communicated with the mixed evaporator through the high-temperature heat regenerator, and the heat source medium channel of the newly-added high-temperature heat exchanger.
Description of the drawings:
FIG. 1 is a schematic 1 st principal thermodynamic system diagram of a single-working-medium combined cycle steam power plant provided in accordance with the present invention.
FIG. 2 is a schematic thermodynamic system diagram of the 2 nd principle of a single-working-medium combined-cycle steam power plant provided in accordance with the present invention.
FIG. 3 is a schematic diagram of the 3 rd principle thermodynamic system of a single-working-medium combined-cycle steam power plant according to the present invention.
FIG. 4 is a diagram of a 4 th principal thermodynamic system of a single-working-medium combined cycle steam power plant provided in accordance with the present invention.
FIG. 5 is a schematic diagram of a 5 th principal thermodynamic system of a single-working-medium combined cycle steam power plant according to the present invention.
FIG. 6 is a schematic diagram of a 6 th principal thermodynamic system of a single-working-medium combined-cycle steam power plant according to the present invention.
FIG. 7 is a 7 th principal thermodynamic system diagram of a single-working-medium combined cycle steam power plant provided in accordance with the present invention.
FIG. 8 is a diagram of an 8 th principal thermodynamic system for a single-working-medium combined cycle steam power plant in accordance with the present invention.
In the figure, 1-diffuser pipe, 2-expander, 3-second expander, 4-circulating pump, 5-high temperature heat exchanger, 6-condenser, 7-mixed evaporator, 8-heat regenerator, 9-second circulating pump, 10-preheater, 11-high temperature heat regenerator; a-adding a compressor, B-adding an expansion machine, C-adding a high-temperature heat exchanger, D-adding an expansion pipe and E-adding a spray pipe.
The specific implementation mode is as follows:
it is to be noted that, in the description of the structure and the flow, the repetition is not necessary; obvious flow is not described. The invention is described in detail below with reference to the figures and examples.
The single-working-medium combined-cycle steam power plant shown in fig. 1 is realized in such a way that:
(1) structurally, the system mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser and a mixed evaporator; the condenser 6 is provided with a condensate pipeline which is communicated with a mixing evaporator 7 through a circulating pump 4, the expander 2 is provided with a steam channel which is communicated with the mixing evaporator 7, the mixing evaporator 7 is also provided with a steam channel which is respectively communicated with a diffuser pipe 1 and a second expander 3, the diffuser pipe 1 is also provided with a steam channel which is communicated with the expander 2 through a high-temperature heat exchanger 5, and the second expander 3 is also provided with a steam channel which is communicated with the condenser 6; the high-temperature heat exchanger 5 is also communicated with the outside through a heat source medium channel, the condenser 6 is also communicated with the outside through a cooling medium channel, the hybrid evaporator 7 is also communicated with the outside through a heat source medium channel, and the expander 2 and the second expander 3 are connected with the outside and output power.
(2) In the process, the condensate of the condenser 6 is boosted by the circulating pump 4 and enters the mixing evaporator 7, the condensate is mixed with the high-temperature steam from the expander 2 and is vaporized after absorbing the heat load provided by the external heat source medium, and the steam generated by the mixing evaporator 7 respectively enters the diffuser pipe 1 for boosting and heating and enters the second expander 3 for pressure reduction and work; the steam discharged by the diffuser pipe 1 flows through the high-temperature heat exchanger 5 and absorbs heat, flows through the expander 2 and enters the mixing evaporator 7 to release heat and reduce the temperature after being decompressed and applied work; the steam discharged from the second expander 3 enters the condenser 6, releases heat to the cooling medium and is condensed; the heat source medium provides driving heat load through the high-temperature heat exchanger 5 and the hybrid evaporator 7, the cooling medium takes away low-temperature heat load through the condenser 6, and the expander 2 and the second expander 3 jointly provide power (such as driving a working machine or a generator) to the outside to form a single-working-medium combined cycle steam power device.
The single-working-medium combined-cycle steam power plant shown in fig. 2 is realized in such a way that:
(1) structurally, the heat exchanger mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, a heat regenerator and a second circulating pump; the condenser 6 is provided with a condensate pipeline which is communicated with a heat regenerator 8 through a circulating pump 4, the second expander 3 is provided with a steam extraction channel which is communicated with the heat regenerator 8, the heat regenerator 8 and the condensate pipeline are communicated with a mixed evaporator 7 through a second circulating pump 9, the expander 2 is provided with a steam channel which is communicated with the mixed evaporator 7, the mixed evaporator 7 is also provided with a steam channel which is respectively communicated with a diffuser pipe 1 and the second expander 3, the diffuser pipe 1 is also provided with a steam channel which is communicated with the expander 2 through a high-temperature heat exchanger 5, and the second expander 3 is also provided with a steam channel which is communicated with the condenser 6; the high-temperature heat exchanger 5 is also communicated with the outside through a heat source medium channel, the condenser 6 is also communicated with the outside through a cooling medium channel, the hybrid evaporator 7 is also communicated with the outside through a heat source medium channel, and the expander 2 and the second expander 3 are connected with the outside and output power.
(2) In the process, the condensate of the condenser 6 is boosted by the circulating pump 4 and enters the heat regenerator 8, the steam extracted by the second expander 3 enters the heat regenerator 8 to release heat and condense, the condensate of the heat regenerator 8 is boosted by the second circulating pump 9 and enters the hybrid evaporator 7, the condensate is mixed with the high-temperature steam from the expander 2 and is vaporized after absorbing the heat load provided by the external heat source medium, the steam generated by the hybrid evaporator 7 is divided into two paths, wherein the first path is provided for the diffuser pipe 1, and the second path is provided for the second expander 3; the first path of steam flows through the diffuser pipe 1 to increase pressure, increase temperature and reduce speed, flows through the high-temperature heat exchanger 5 to absorb heat, flows through the expander 2 to reduce pressure and work, then enters the hybrid evaporator 7 to release heat and reduce temperature; the second path of steam enters the second expansion machine 3 to complete partial work and then is divided into two paths, the first path enters the heat regenerator 8, and the second path continues to reduce the pressure and work and then enters the condenser 6 to release heat and condense; the heat source medium provides driving heat load through the high-temperature heat exchanger 5 and the hybrid evaporator 7, the cooling medium takes away the low-temperature heat load through the condenser 6, and the expander 2 and the second expander 3 jointly provide power to the outside to form a single working medium combined cycle steam power device.
The single-working-medium combined-cycle steam power plant shown in fig. 3 is realized in such a way that:
(1) structurally, the system mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator and a preheater; the condenser 6 is provided with a condensate pipeline which is communicated with a mixing evaporator 7 through a circulating pump 4 and a preheater 10, the expander 2 is provided with a steam channel which is communicated with the mixing evaporator 7, the mixing evaporator 7 is also provided with a steam channel which is respectively communicated with a diffuser pipe 1 and a second expander 3, the diffuser pipe 1 is also provided with a steam channel which is communicated with the expander 2 through a high-temperature heat exchanger 5, and the second expander 3 is also provided with a steam channel which is communicated with the condenser 6; the high-temperature heat exchanger 5 is also communicated with the outside through a heat source medium channel, the condenser 6 is also communicated with the outside through a cooling medium channel, the hybrid evaporator 7 is also communicated with the outside through a heat source medium channel, the preheater 10 is also communicated with the outside through a heat source medium channel, and the expander 2 and the second expander 3 are connected with the outside and output power.
(2) In the process, the condensate of the condenser 6 is boosted by the circulating pump 4, absorbed by the preheater 10 and heated, and then enters the mixing evaporator 7; high-temperature steam discharged by the expansion machine 2 enters the mixing evaporator 7 to be mixed with the condensate and release heat, an external heat source medium provides heat load for the condensate, and the condensate absorbs heat and is vaporized; the steam generated by the mixed evaporator 7 enters the diffuser pipe 1 to increase the pressure and temperature and enters the second expander 3 to reduce the pressure and do work respectively; the steam discharged by the diffuser pipe 1 flows through the high-temperature heat exchanger 5 and absorbs heat, flows through the expander 2 and enters the mixing evaporator 7 to release heat and reduce the temperature after being decompressed and applied work; the steam discharged from the second expander 3 enters the condenser 6, releases heat to the cooling medium and is condensed; the heat source medium provides driving heat load through the high-temperature heat exchanger 5, the hybrid evaporator 7 and the preheater 10, the cooling medium takes away the low-temperature heat load through the condenser 6, and the expander 2 and the second expander 3 jointly provide power to the outside to form a single working medium combined cycle steam power device.
The single-working-medium combined-cycle steam power plant shown in fig. 4 is realized in such a way that:
(1) structurally, in the single-working-medium combined-cycle steam power plant shown in fig. 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 expander 2 through the high-temperature heat exchanger 5 and adjusted to be that the diffuser pipe 1 is communicated with the newly-added compressor A through the high-temperature heat exchanger 5 and provided with a steam channel, the newly-added compressor A is communicated with the expander 2 through a newly-added high-temperature heat exchanger C, the newly-added high-temperature heat exchanger C is communicated with the outside through a heat source medium channel, and the expander 2 is connected with the newly-added compressor A and transmits.
(2) Compared with the single-working medium combined cycle steam power plant shown in the figure 3, the difference in the flow is that the steam discharged from the diffuser pipe 1 flows through the high-temperature heat exchanger 5 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 C and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; the expander 2 provides power for the newly-added compressor A, and the heat source medium provides driving heat load through the high-temperature heat exchanger 5, the newly-added high-temperature heat exchanger C, the mixed evaporator 7 and the preheater 10 respectively, so that the single-working-medium combined cycle steam power device is formed.
The single-working-medium combined-cycle steam power plant shown in fig. 5 is realized in such a way that:
(1) structurally, in the single-working medium combined cycle steam power plant shown in fig. 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 machine 2 through the high-temperature heat exchanger 5, the steam channel of the diffuser pipe 1 is communicated with a new expansion machine B through the high-temperature heat exchanger 5, the steam channel of the new expansion machine B is communicated with the expansion machine 2 through a new high-temperature heat exchanger C, the new high-temperature heat exchanger C is also communicated with the outside through a heat source medium channel, and the new expansion machine B is connected with the outside and transmits power.
(2) Compared with the single-working medium combined cycle steam power device shown in the figure 3, the difference of the flow is that the steam discharged by the diffuser pipe 1 flows through the high-temperature heat exchanger 5 and absorbs heat, and then enters the new expansion machine B to reduce the pressure and do work; the steam discharged by the newly added expansion machine B flows through the newly added high-temperature heat exchanger C and absorbs heat, and then enters the expansion machine 2 to reduce the pressure and do work; the work output by the new expansion machine B is provided for the outside, and the heat source medium provides driving heat load through the high-temperature heat exchanger 5, the new high-temperature heat exchanger C, the mixed evaporator 7 and the preheater 10 respectively, so that the single-working-medium combined cycle steam power device is formed.
The single-working-medium combined-cycle steam power plant shown in fig. 6 is realized in such a way that:
(1) structurally, in the single-working medium combined cycle steam power plant shown in fig. 3, a high-temperature heat regenerator is added, a steam channel of the diffuser pipe 1 is communicated with the expander 2 through a high-temperature heat exchanger 5 and adjusted to be communicated with the expander 2 through a steam channel of the diffuser pipe 1 and a high-temperature heat exchanger 11 and a high-temperature heat exchanger 5, and a steam channel of the expander 2 is communicated with the hybrid evaporator 7 and adjusted to be communicated with the hybrid evaporator 7 through a steam channel of the expander 2 and the high-temperature heat regenerator 11.
(2) In the process, compared with the single working medium combined cycle steam power device shown in fig. 3, the difference lies in that steam discharged from the diffuser pipe 1 flows through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 5 and gradually absorbs heat to raise the temperature, and steam discharged from the expander 2 flows through the high-temperature heat regenerator 11 to release heat and lower the temperature and then enters the hybrid evaporator 7, so as to form the single working medium combined cycle steam power device.
The single-working-medium combined-cycle steam power plant shown in fig. 7 is realized in such a way that:
(1) structurally, in the single-working medium combined cycle steam power plant shown in fig. 3, a high-temperature heat regenerator, a newly-increased diffuser pipe and a newly-increased high-temperature heat exchanger are added, a steam channel of the diffuser pipe 1 is communicated with the expander 2 through the high-temperature heat exchanger 5 and adjusted to be communicated with a newly-increased diffuser pipe D through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 5, a steam channel of the newly-increased diffuser pipe D is communicated with the expander 2 through the newly-increased high-temperature heat exchanger C, a steam channel of the expander 2 is communicated with the hybrid evaporator 7 through the high-temperature heat regenerator 11, and a steam channel of the expander 2 is adjusted to be communicated with the hybrid evaporator 7 through the newly-increased high heat exchanger C and a heat source medium channel is communicated with the outside.
(2) In the process, compared with the single-working medium combined cycle steam power plant shown in fig. 3, the difference lies in that steam discharged from the diffuser pipe 1 flows through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 5 and gradually absorbs heat and heats up, and then enters the newly-added diffuser pipe D to boost, heat up and reduce the speed; the steam discharged by the newly added diffuser pipe D flows through the newly added high-temperature heat exchanger C and absorbs heat, and then enters the expander 2 to reduce the pressure and do work; steam discharged by the expander 2 flows through the high-temperature heat regenerator 1, releases heat and cools, and then enters the hybrid evaporator 7; the heat source medium provides driving heat load through the high temperature heat exchanger 5, the newly-added high temperature heat exchanger C, the mixed evaporator 7 and the preheater 10 respectively, and a single-working-medium combined cycle steam power device is formed.
The single-working-medium combined-cycle steam power plant shown in fig. 8 is realized in such a way that:
(1) structurally, in the single-working medium combined cycle steam power plant shown in fig. 3, a high-temperature heat regenerator, a newly-added spray pipe and a newly-added high-temperature heat exchanger are added, a steam channel of a diffuser pipe 1 is communicated with an expander 2 through the high-temperature heat exchanger 5 and adjusted to be that the steam channel of the diffuser pipe 1 is communicated with a newly-added spray pipe E through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 5, the steam channel of the newly-added spray pipe E is communicated with the expander 2 through the newly-added high-temperature heat exchanger C, the steam channel of the expander 2 is communicated with a hybrid evaporator 7 through the high-temperature heat regenerator 11, and the steam channel of the newly-added high-temperature heat exchanger C is communicated with the outside.
(2) In the process, compared with the single-working medium combined cycle steam power device shown in fig. 3, the difference lies in that steam discharged from the diffuser pipe 1 flows through the high-temperature heat regenerator 11 and the high-temperature heat exchanger 5 and gradually absorbs heat and increases temperature, and then enters the newly-added spray pipe E to reduce the pressure, reduce the temperature and increase the speed; the steam discharged by the newly added spray pipe E flows through the newly added high-temperature heat exchanger C and absorbs heat, and then enters the expansion machine 2 to reduce the pressure and do work; steam discharged by the expander 2 flows through the high-temperature heat regenerator 11, releases heat and cools, and then enters the hybrid evaporator 7; the heat source medium provides driving heat load through the high temperature heat exchanger 5, the newly-added high temperature heat exchanger C, the mixed evaporator 7 and the preheater 10 respectively, and a single-working-medium combined cycle steam power device is formed.
The effect that the technology of the invention can realize-the single working medium combined cycle steam power plant provided by the invention has the following effects and advantages:
(1) the diffuser pipe is adopted to replace a main compressor, so that the manufacturing difficulty and the manufacturing cost of the single-working-medium combined-cycle steam power device are greatly reduced.
(2) The spray pipe is adopted to replace a non-main expansion machine, so that the manufacturing difficulty and the manufacturing cost of the single-working-medium combined-cycle steam power device are effectively reduced.
(3) The load of the main expander (i.e., the expander 2) can be indirectly reduced, so that the manufacturing difficulty and the manufacturing cost of the main expander are effectively reduced.
(4) The simple components replace complex components, and the heat efficiency of the single working medium combined cycle steam power device is kept or improved.
(5) 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.
(6) The technology of the single-working-medium combined-cycle steam power device is expanded, the types of the single-working-medium combined-cycle steam power device are enriched, the conversion of heat energy into mechanical energy is favorably realized, and the application range of the single-working-medium combined-cycle steam power device is expanded.
Claims (12)
1. The single working medium combined cycle steam power device mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser and a mixed evaporator; the condenser (6) is provided with a condensate pipeline which is communicated with the mixing evaporator (7) through a circulating pump (4), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (7), the mixing evaporator (7) is also provided with a steam channel which is respectively communicated with the diffuser pipe (1) and the second expander (3), the diffuser pipe (1) is also provided with a steam channel which is communicated with the expander (2) through a high-temperature heat exchanger (5), and the second expander (3) is also provided with a steam channel which is communicated with the condenser (6); the high-temperature heat exchanger (5) is also provided with a heat source medium channel communicated with the outside, the condenser (6) is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator (7) or the heat source medium channel is also communicated with the outside, and the expander (2) and the second expander (3) are connected with the outside and output power to form a single-working-medium combined-cycle steam power device; wherein, or the expander (2) is connected with the circulating pump (4) and transmits power.
2. The single working medium combined cycle steam power device mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator, a heat regenerator and a second circulating pump; the condenser (6) is provided with a condensate pipeline which is communicated with a heat regenerator (8) through a circulating pump (4), the second expander (3) is provided with a steam extraction channel which is communicated with the heat regenerator (8), the heat regenerator (8) is also provided with a condensate pipeline which is communicated with a mixed evaporator (7) through a second circulating pump (9), the expander (2) is provided with a steam channel which is communicated with the mixed evaporator (7), the mixed evaporator (7) is also provided with a steam channel which is respectively communicated with the diffuser pipe (1) and the second expander (3), the diffuser pipe (1) is also provided with a steam channel which is communicated with the expander (2) through a high-temperature heat exchanger (5), and the second expander (3) is also provided with a steam channel which is communicated with the condenser (6); the high-temperature heat exchanger (5) is also provided with a heat source medium channel communicated with the outside, the condenser (6) is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator (7) or the heat source medium channel is also communicated with the outside, and the expander (2) and the second expander (3) are connected with the outside and output power to form a single-working-medium combined-cycle steam power device; wherein, or the expander (2) is connected with the circulating pump (4) and the second circulating pump (9) and transmits power.
3. The single working medium combined cycle steam power device mainly comprises a diffuser pipe, an expander, a second expander, a circulating pump, a high-temperature heat exchanger, a condenser, a mixed evaporator and a preheater; the condenser (6) is provided with a condensate liquid pipeline which is communicated with the mixing evaporator (7) through a circulating pump (4) and a preheater (10), the expander (2) is provided with a steam channel which is communicated with the mixing evaporator (7), the mixing evaporator (7) is also provided with a steam channel which is respectively communicated with the diffuser pipe (1) and the second expander (3), the diffuser pipe (1) is also provided with a steam channel which is communicated with the expander (2) through a high-temperature heat exchanger (5), and the second expander (3) is also provided with a steam channel which is communicated with the condenser (6); the high-temperature heat exchanger (5) is also provided with a heat source medium channel communicated with the outside, the condenser (6) is also provided with a cooling medium channel communicated with the outside, the hybrid evaporator (7) or the heat source medium channel is also communicated with the outside, the preheater (10) is also provided with a heat source medium channel communicated with the outside, and the expander (2) and the second expander (3) are connected with the outside and output power to form a single-working-medium combined-cycle steam power device; wherein, or the expander (2) is connected with the circulating pump (4) and transmits power.
4. A single working medium combined cycle steam power device is characterized in that a newly-added compressor and a newly-added high-temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of a diffuser pipe (1) is communicated with an expander (2) through the high-temperature heat exchanger (5) and adjusted to be that the diffuser pipe (1) is communicated with a newly-added compressor (A) through the high-temperature heat exchanger (5) and is further communicated with the expander (2) through the steam channel of the newly-added compressor (A), the newly-added high-temperature heat exchanger (C) is further communicated with the outside through a heat source medium channel, and the expander (2) is connected with the newly-added compressor (A) and transmits power to form the single working medium combined cycle steam power device.
5. A single working medium combined cycle steam power device is characterized in that a new expansion machine and a new increased high temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of a diffuser pipe (1) is communicated with an expansion machine (2) through the high temperature heat exchanger (5) and adjusted to be that the diffuser pipe (1) is communicated with a new expansion machine (B) through the high temperature heat exchanger (5) and is further communicated with the expansion machine (2) through a steam channel of the new expansion machine (B), the new increased high temperature heat exchanger (C) is further communicated with the outside through a heat source medium channel, and the new expansion machine (B) is connected with the outside and transmits power to form the single working medium combined cycle steam power device.
6. A single working medium combined cycle steam power device is characterized in that a newly-added diffuser pipe and a newly-added high-temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of the diffuser pipe (1) is communicated with an expander (2) through the high-temperature heat exchanger (5) and adjusted to be that the diffuser pipe (1) is communicated with a newly-added diffuser pipe (D) through the high-temperature heat exchanger (5) and is further communicated with the expander (2) through the steam channel, the newly-added diffuser pipe (D) is further communicated with the expander (2) through the newly-added high-temperature heat exchanger (C), and the newly-added high-temperature heat exchanger (C) is further communicated with the outside through a heat source medium channel to form the single working medium.
7. A single working medium combined cycle steam power device is characterized in that any one of the single working medium combined cycle steam power devices in claims 1-3 is additionally provided with a newly-added spray pipe and a newly-added high-temperature heat exchanger, a steam channel of a diffuser pipe (1) is communicated with an expander (2) through the high-temperature heat exchanger (5) and adjusted to be that the diffuser pipe (1) is provided with a steam channel which is communicated with the newly-added spray pipe (E) through the high-temperature heat exchanger (5), the newly-added spray pipe (E) is further provided with a steam channel which is communicated with the expander (2) through the newly-added high-temperature heat exchanger (C), and the newly-added high-temperature heat exchanger (C) is further provided with a heat source medium channel which is communicated.
8. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator is added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of a diffuser pipe (1) is communicated with an expander (2) through a high-temperature heat exchanger (5) and adjusted to be communicated with the expander (2) through a steam channel of the diffuser pipe (1) and the high-temperature heat exchanger (5), a steam channel of the expander (2) is communicated with a hybrid evaporator (7) and adjusted to be communicated with the hybrid evaporator (7) through the high-temperature heat regenerator (11), and the single working medium combined cycle steam power device is formed.
9. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-added compressor and a newly-added high-temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of a diffuser pipe (1) is communicated with an expander (2) through the high-temperature heat exchanger (5) and adjusted to be communicated with the newly-added compressor (A) through the high-temperature heat regenerator (11) and the high-temperature heat exchanger (5), the steam channel of the newly-added compressor (A) is communicated with the expander (2) through the newly-added high-temperature heat exchanger (C), the steam channel of the expander (2) is communicated with a hybrid evaporator (7) and adjusted to be communicated with the expander (2) through the high-temperature heat regenerator (11) and the hybrid evaporator (7), and the medium channel of the newly-added high-temperature heat exchanger (C) is communicated with an external heat source, the expander (2) is connected with the newly-added compressor (A) and transmits power to form a single-working-medium combined-cycle steam power device.
10. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-increased expansion machine and a newly-increased high-temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of a diffuser pipe (1) is communicated with an expansion machine (2) through a high-temperature heat exchanger (5) and adjusted to be communicated with a newly-increased expansion machine (B) through a high-temperature heat regenerator (11) and the high-temperature heat exchanger (5), the newly-increased expansion machine (B) is further communicated with the expansion machine (2) through a newly-increased high-temperature heat exchanger (C), a steam channel of the expansion machine (2) is communicated with a mixed evaporator (7) and adjusted to be communicated with the expansion machine (2) through a steam channel of the high-temperature heat regenerator (11) and the mixed evaporator (7), the newly-increased high-temperature heat exchanger (C) is also communicated with the outside, the new expansion machine (B) is connected with the outside and transmits power to form a single working medium combined cycle steam power device.
11. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-increased diffuser pipe and a newly-increased high-temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of the diffuser pipe (1) is communicated with an expander (2) through the high-temperature heat exchanger (5) and adjusted to be communicated with a newly-increased diffuser pipe (D) through the high-temperature heat regenerator (11) and the high-temperature heat exchanger (5), the newly-increased diffuser pipe (D) is further communicated with the expander (2) through the newly-increased high-temperature heat exchanger (C), a steam channel of the expander (2) is communicated with a mixed evaporator (7) and adjusted to be communicated with the expander (2) through the steam channel of the high-temperature heat regenerator (11) and the mixed evaporator (7), and the newly-increased high-temperature heat exchanger (C) is also communicated with the outside through a heat source medium channel, forming a single working medium combined cycle steam power plant.
12. A single working medium combined cycle steam power device is characterized in that a high-temperature heat regenerator, a newly-added spray pipe and a newly-added high-temperature heat exchanger are added in any single working medium combined cycle steam power device of claims 1-3, a steam channel of a diffuser pipe (1) is communicated with an expander (2) through the high-temperature heat exchanger (5) and adjusted to be that the diffuser pipe (1) is communicated with a newly-added spray pipe (E) through the high-temperature heat regenerator (11) and the high-temperature heat exchanger (5), the newly-added spray pipe (E) is further communicated with the expander (2) through the newly-added high-temperature heat exchanger (C), the expander (2) is communicated with a mixed evaporator (7) through the steam channel of the expander (2) and adjusted to be that the expander (2) is communicated with the mixed evaporator (7) through the high-temperature heat regenerator (11), and the newly-added high-temperature heat exchanger (C) is also communicated with an external, forming a single working medium combined cycle steam power plant.
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