CN117759504A

CN117759504A - Photo-thermal carrying single-working-medium combined cycle steam power device

Info

Publication number: CN117759504A
Application number: CN202311874364.8A
Authority: CN
Inventors: 李华玉; 李鸿瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-01-06
Filing date: 2023-12-29
Publication date: 2024-03-26

Abstract

The invention provides a photo-thermal co-single-working-medium combined cycle steam power device, and belongs to the technical field of thermodynamics and thermal power. The compressor is provided with a first steam channel which is communicated with a second expander through a heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with a medium-temperature photothermal system, the condenser is provided with a condensate pipe which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with the expander through the second compressor and a high-temperature photothermal system, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely, the first path is communicated with the compressor and the second path is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form the photo-thermal co-single-working-medium combined cycle steam power device.

Description

Photo-thermal carrying single-working-medium combined cycle steam power device

Technical field:

the invention belongs to the technical field of thermodynamics and thermal dynamics.

The background technology is as follows:

the high-temperature photo-thermal and the medium-temperature photo-thermal can realize thermal work; different system devices are constructed by adopting the same or different thermal power principles, and corresponding construction cost is paid, so that high-temperature photo-thermal or medium-temperature photo-thermal is converted into mechanical energy; obviously, it is of positive interest to try to reduce the number of thermal power devices.

In order to improve the efficiency of converting solar energy into mechanical energy, high-temperature photo-thermal is the main direction of solar energy utilization and development; correspondingly, the construction cost of the solar heat collection system is increased significantly. Analysis shows that the dynamic application value of photo-heat is difficult to be improved in the same proportion along with the improvement of the photo-heat temperature due to the influence of the working principle, materials, thermodynamic cycle and the property of working medium.

In order to increase the heat-changing work efficiency, the circulating working medium must be brought to a temperature as high as possible after the high-temperature load is obtained; however, at this time, the temperature of the circulating working medium discharged by the high-temperature expander is increased, the heat discharge is increased, and the heat transfer temperature difference loss in the thermodynamic system is increased, which has an adverse effect on the improvement of the heat-variable work efficiency.

The invention provides a light and heat carrying single-working-medium combined cycle steam power device which has the advantages of flexible connection, reasonable flow, simple structure, small irreversible loss of systematic temperature difference of a thermal power device and reasonable thermodynamic perfection and high cost performance based on the basic principle of simply, actively, safely and efficiently utilizing energy to obtain power.

The invention comprises the following steps:

the invention mainly aims to provide a photo-thermal co-single-working-medium combined cycle steam power device, and the specific invention is described in the following items:

1. the photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor and a high-temperature photo-thermal system; the compressor is provided with a first steam channel which is communicated with a second expander through a heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with a medium-temperature photothermal system, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is further provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with a high-temperature photothermal system through the second compressor, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

2. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor and a high-temperature photo-thermal system; the compressor is provided with a first steam channel which is communicated with a second expander through a heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the medium-temperature photothermal system, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with a high-temperature photothermal system through the second compressor, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator after being communicated with the expander through the heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

3. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor is provided with a first steam channel which is communicated with a second expander through a heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with a medium-temperature photothermal system, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with a high-temperature photothermal system through the second compressor and the second heat regenerator, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the second heat regenerator and the heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

4. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor is provided with a first steam channel which is communicated with a second expander through a heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with a medium-temperature photothermal system, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with a high-temperature photothermal system through the second heat regenerator and the second compressor, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the second heat regenerator and the heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

5. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor is provided with a first steam channel which is communicated with the second expander through the heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the medium-temperature photo-thermal system through the second heat regenerator, the condenser is provided with a condensate pipeline which is communicated with the evaporator through the booster pump, the evaporator is further provided with a steam channel which is communicated with the medium-temperature photo-thermal system through the second heat regenerator, the medium-temperature photo-thermal system is also provided with a steam channel which is communicated with the high-temperature photo-thermal system through the second compressor, the high-temperature photo-thermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the second heat regenerator and the heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

6. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor is provided with a first steam channel which is communicated with the second expander through the heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the medium-temperature photothermal system, the condenser is provided with a condensate pipeline which is communicated with the evaporator through the booster pump, then the evaporator is provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with the high-temperature photothermal system through the second compressor and the second heat regenerator, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the heat regenerator after being communicated with the second heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

7. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor is provided with a first steam channel which is communicated with the second expander through the heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the medium-temperature photothermal system, the condenser is provided with a condensate pipeline which is communicated with the evaporator through the booster pump, then the evaporator is provided with a steam channel which is communicated with the medium-temperature photothermal system, the medium-temperature photothermal system is also provided with a steam channel which is communicated with the high-temperature photothermal system through the second heat regenerator and the second compressor, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a steam channel which is communicated with the evaporator through the heat regenerator after being communicated with the second heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

8. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor is provided with a first steam channel which is communicated with a second expander through a heat regenerator, the second expander is also provided with a low-pressure steam channel which is communicated with the evaporator, the compressor is also provided with a second steam channel which is communicated with the medium-temperature photothermal system through the second heat regenerator, the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, the evaporator is further provided with a steam channel which is communicated with the medium-temperature photothermal system through the second heat regenerator, the medium-temperature photothermal system is also provided with a steam channel which is communicated with a high-temperature photothermal system through the second compressor, the high-temperature photothermal system is also provided with a steam channel which is communicated with the expander, the expander is also provided with a low-pressure steam channel which is communicated with the evaporator through the heat regenerator after being communicated with the second heat regenerator, and the evaporator is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the condenser is also provided with a cooling medium channel which is communicated with the outside, and the expander is connected with the compressor and the second compressor and transmits power to form a photo-thermal co-single-working-medium combined cycle steam power device; wherein, or the expander is connected with the compressor, the booster pump and the second compressor and transmits power.

9. The photo-thermal single-working-medium combined cycle steam power device according to the 3 rd or 6 th aspect is characterized in that the second compressor with a steam channel is communicated with the high-temperature photo-thermal system through the second heat regenerator, and the second compressor with the steam channel is communicated with the high-temperature photo-thermal system after the second compressor with the steam channel is communicated with the second heat regenerator.

10. A photo-thermal single-medium combined cycle steam power device is formed by adding a second booster pump and a low-temperature heat regenerator in any one of the photo-thermal single-medium combined cycle steam power devices in the 1 st to 9 th, adjusting the communication between a condenser condensate pipe and the booster pump to be that the condenser has the condensate pipe which is communicated with the low-temperature heat regenerator through the second booster pump, and adding a steam extraction channel to the compressor which is communicated with the low-temperature heat regenerator, wherein the low-temperature heat regenerator is further communicated with the booster pump through the condensate pipe.

11. A photo-thermal single-working-medium combined cycle steam power device is formed by adding a second evaporator and a diffuser pipe in any one of the photo-thermal single-working-medium combined cycle steam power devices in the 1 st and the 3-9 th, adjusting the communication between a low-pressure steam channel of a regenerator and the evaporator to be that between the regenerator and the second evaporator through the evaporator, adjusting the communication between the low-pressure steam channel of the second expander and the evaporator to be that between the low-pressure steam channel of the second expander and the second evaporator through the evaporator, adjusting the communication between the low-pressure steam channel of the evaporator and the compressor and the condenser to be that between the low-pressure steam channel of the second evaporator and the compressor and the condenser respectively, adjusting the communication between the condensate pipe of the condenser and the evaporator through a booster pump to be that between the condensate pipe of the condenser and the second evaporator through the booster pump and then between the second evaporator and a wet steam channel of the second evaporator through the diffuser pipe.

12. The photo-thermal single-working-medium combined cycle steam power device is characterized in that a second evaporator and a diffuser pipe are added in the photo-thermal single-working-medium combined cycle steam power device in the 2 nd step, the low-pressure steam channel of the expander is communicated with the evaporator to be adjusted to be communicated with the low-pressure steam channel of the expander, the low-pressure steam channel of the second expander is communicated with the evaporator to be adjusted to be communicated with the low-pressure steam channel of the second expander, the low-pressure steam channel of the second expander is communicated with the second evaporator, the low-pressure steam channel of the evaporator is respectively communicated with the compressor and the condenser to be respectively communicated with the low-pressure steam channel of the second evaporator and the compressor, the condenser condensate pipe is communicated with the condenser through the booster pump and the second evaporator, and then the second evaporator is communicated with the evaporator through the diffuser pipe.

13. The photo-thermal single-working-medium combined cycle steam power plant is characterized in that in any one of the photo-thermal single-working-medium combined cycle steam power plants in the 1 st to 12 th, an expansion speed increaser is added and replaces the expansion machine, a second expansion speed increaser is added and replaces the second expansion machine, a dual-energy compressor is added and replaces the compressor, a newly added diffuser pipe is added and replaces the booster pump, a second dual-energy compressor is added and replaces the second compressor, and the photo-thermal single-working-medium combined cycle steam power plant is formed.

Description of the drawings:

fig. 1 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

Fig. 2 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

Fig. 3 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

Fig. 4 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention, no. 4.

Fig. 5 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

Fig. 6 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

Fig. 7 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

Fig. 8 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the 8 th principle.

Fig. 9 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

FIG. 10 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention.

FIG. 11 is a schematic thermodynamic system diagram of a photo-thermal co-single-working-medium combined cycle steam power plant according to the invention, 11 th principles.

FIG. 12 is a schematic diagram of a 12 th principle thermodynamic system of a photo-thermal co-single-working-medium combined cycle steam power plant according to the present invention.

In the figure, a 1-expander, a 2-second expander, a 3-compressor, a 4-booster pump, a 5-regenerator, a 6-condenser, a 7-evaporator, an 8-medium temperature photothermal system, a 9-second compressor, a 10-solar heat collection system, a 11-second regenerator, a 12-second booster pump, a 13-low temperature regenerator, a 14-second evaporator and a 15-diffuser pipe are arranged; the system comprises an A-expansion speed increaser, a B-second expansion speed increaser, a C-dual-energy compressor, a D-newly added diffuser pipe and an E-second dual-energy compressor.

The following brief description is given here about the photo-thermal, medium-temperature photo-thermal system and high-temperature photo-thermal system in the respective aspects:

(1) The medium-temperature photo-thermal system and the high-temperature photo-thermal system in the application of the invention are two types of solar heat collection systems; the former is low in temperature and the latter is high in temperature.

(2) Solar heat collection systems, also known as solar heating systems, refer to heating systems that utilize a heat collector to convert solar radiant energy into medium-temperature heat energy/high-temperature heat energy (simply referred to as photo-thermal), which can be used to provide driving heat loads to a thermodynamic cycle system; it is mainly composed of heat collector and related necessary auxiliary facilities.

(3) It is apparent that solar energy collection systems in a broader sense include various systems that employ various means and devices to convert solar energy into thermal energy at different temperatures.

(4) Types of solar energy collection systems include, but are not limited to: (1) the concentrating solar heat collection system mainly comprises a groove type system, a tower type system and a butterfly type system at present; (2) the non-concentrating solar heat collecting system has solar pond, solar chimney and other systems.

(5) There are two main types of heat supply modes of solar heat collection systems at present: (1) the medium temperature/high temperature heat energy converted by solar energy is directly provided for a circulating working medium flowing through a solar heat collection system; (2) the medium-temperature heat energy/high-temperature heat energy converted from solar energy is firstly provided for a working medium of a self-circulation loop, and then the working medium is provided for a circulation working medium flowing through a solar heat collection system through a heat exchanger.

The specific embodiment is as follows:

it is to be noted that the description of the structure and the flow is not repeated if necessary; obvious procedures are not described. The invention is described in detail below with reference to the drawings and examples.

The photo-thermal co-single-working-medium combined cycle steam power device shown in fig. 1 is realized by the following steps:

(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a booster pump, a regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor and a high-temperature photo-thermal system; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photothermal system 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photothermal system 8, the medium-temperature photothermal system 8 is also provided with a steam channel which is communicated with the high-temperature photothermal system 10 through the second compressor 9, the high-temperature photothermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the heat regenerator 5, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor 3 and a second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, part of low-pressure steam discharged by the evaporator 7 enters the compressor 3 to be boosted and heated to a certain extent and then is divided into two paths, wherein the first path is used for absorbing heat and heating through the heat regenerator 5 and is used for providing power after being subjected to depressurization and working through the second expander 2 to the evaporator 7, and the second path is used for continuously boosting and heating and then enters the medium-temperature photo-thermal system 8 for absorbing heat and heating; the condensate discharged by the condenser 6 is boosted by the booster pump 4, is absorbed by the evaporator 7 to heat and vaporize, and then enters the medium-temperature photo-thermal system 8 to absorb heat and raise temperature; the second compressor 9 of the steam discharged by the medium-temperature photo-thermal system 8 is boosted and heated, absorbs heat and heats up through the high-temperature photo-thermal system 10, reduces pressure and works through the expander 1, releases heat and cools down through the heat regenerator 5, and then is provided for the evaporator 7; the low-pressure steam discharged by the heat regenerator 5 and the second expander 2 flows through the evaporator 7 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 3 to raise the pressure and the temperature, and the second path enters the condenser 6 to release heat and condense; the solar energy provides driving heat load through the medium-temperature photo-thermal system 8 and the high-temperature photo-thermal system 10, and the cooling medium takes away low-temperature heat load through the condenser 6; work output by the expander 1 and the second expander 2 is provided for the compressor 3, the second compressor 9 and external power, or work output by the expander 1 and the second expander 2 is provided for the compressor 3, the booster pump 4, the second compressor 9 and external power, so that the photo-thermal co-single-working-medium combined cycle steam power device is formed.

The photo-thermal co-single-working-medium combined cycle steam power device shown in fig. 2 is realized by the following steps:

(1) Structurally, the system mainly comprises an expander, a second expander, a compressor, a booster pump, a regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor and a high-temperature photo-thermal system; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photothermal system 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photothermal system 8, the medium-temperature photothermal system 8 is also provided with a steam channel which is communicated with the high-temperature photothermal system 10 through the second compressor 9, the high-temperature photothermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 after the steam channel is communicated with the expander 1 by the heat regenerator 5, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor 3 and a second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the steam discharged by the high-temperature photo-thermal system 10 enters the expander 1 to perform decompression and work, flows through the regenerator 5 to release heat and cool to a certain extent, enters the expander 1 to continue decompression and work, and then is provided for the evaporator 7 to form the photo-thermal carrying same-single-working-medium combined cycle steam power device.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 3 is realized by the following steps:

(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photothermal system 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photothermal system 8, the medium-temperature photothermal system 8 is also provided with a steam channel which is communicated with the high-temperature photothermal system 10 through the second compressor 9 and the second heat regenerator 11, the high-temperature photothermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the second heat regenerator 11 and the heat regenerator 5, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor 3 and a second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the steam discharged by the second compressor 9 is gradually absorbed in heat and increased in temperature through the second heat regenerator 11 and the high-temperature photo-thermal system 10, is subjected to depressurization and work through the expander 1, is gradually released in heat and reduced in temperature through the second heat regenerator 11 and the heat regenerator 5, and is then supplied to the evaporator 7 to form the photo-thermal co-single-working medium combined cycle steam power device.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 4 is realized by the following steps:

(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photothermal system 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photothermal system 8, the medium-temperature photothermal system 8 is also provided with a steam channel which is communicated with the high-temperature photothermal system 10 through the second heat regenerator 11 and the second compressor 9, the high-temperature photothermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the second heat regenerator 11 and the heat regenerator 5, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor 3 and a second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: steam discharged by the medium-temperature photo-thermal system 8 is subjected to heat absorption and temperature rise through the second heat regenerator 11, is subjected to pressure rise and temperature rise through the second compressor 9, is subjected to heat absorption and temperature rise through the high-temperature photo-thermal system 10, is subjected to pressure reduction and work through the expander 1, is subjected to gradual heat release and temperature reduction through the second heat regenerator 11 and the heat regenerator 5, and is then provided for the evaporator 7 to form the photo-thermal co-single-working-medium combined cycle steam power device.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 5 is realized by the following steps:

(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photothermal system 8 through the second heat regenerator 11, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photothermal system 8 through the second heat regenerator 11, the medium-temperature photothermal system 8 is also provided with a steam channel which is communicated with the high-temperature photothermal system 10 through the second compressor 9, the high-temperature photothermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the second heat regenerator 11 and the heat regenerator 5, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor 3 and a second path which is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the high-pressure steam discharged by the evaporator 7 and the compressor 3 flows through the second heat regenerator 11 to absorb heat and raise temperature, and is then supplied to the medium-temperature photo-thermal system 8; the low-pressure steam discharged by the expander 1 flows through the second heat regenerator 11, the heat regenerator 5 and the evaporator 7 to release heat and cool gradually, and then respectively enters the compressor 3 to raise the pressure and raise the temperature and enters the condenser 6 to release heat and condense, so that the photo-thermal co-single-working medium combined cycle steam power device is formed.

The photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 6 is realized in such a way;

(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photo-thermal system 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photo-thermal system 8, the medium-temperature photo-thermal system 8 is also provided with a steam channel which is communicated with the high-temperature photo-thermal system 10 through the second compressor 9 and the second heat regenerator 11, the high-temperature photo-thermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is further provided with a low-pressure steam channel which is communicated with the evaporator 7 through the heat regenerator 5 after the steam channel is communicated with the expander 1, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the steam discharged by the second compressor 9 is gradually absorbed in heat and is heated up through the second heat regenerator 11 and the high-temperature photo-thermal system 10, and then is supplied to the expander 1; the steam enters the expander 1 to perform decompression and work, flows through the second heat regenerator 11 to release heat and cool to a certain extent, enters the expander 1 to continue decompression and work, flows through the heat regenerator 5 to release heat and cool, and then is provided for the evaporator 7 to form the photo-thermal co-single-working medium combined cycle steam power device.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 7 is realized by the following steps:

(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photo-thermal system 8, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photo-thermal system 8, the medium-temperature photo-thermal system 8 is also provided with a steam channel which is communicated with the high-temperature photo-thermal system 10 through the second heat regenerator 11 and the second compressor 9, the high-temperature photo-thermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is further provided with a low-pressure steam channel which is communicated with the evaporator 7 through the heat regenerator 5 after the steam channel is communicated with the expander 1, and the evaporator 7 is also provided with a low-pressure steam channel which is divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: steam discharged by the medium-temperature photo-thermal system 8 flows through the second heat regenerator 11 to absorb heat and raise temperature, and is then provided for the second compressor 9; the steam discharged by the high-temperature photo-thermal system 10 enters the expander 1 to perform decompression work, flows through the second heat regenerator 11 to release heat and reduce temperature to a certain extent, enters the expander 1 to continue decompression work, flows through the heat regenerator 5 to release heat and reduce temperature, and then is supplied to the evaporator 7 to form the photo-thermal co-single-working medium combined cycle steam power device.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 8 is realized by the following steps:

(1) Structurally, the device mainly comprises an expander, a second expander, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor 3 is provided with a first steam channel which is communicated with the second expander 2 through the heat regenerator 5, the second expander 2 is also provided with a low-pressure steam channel which is communicated with the evaporator 7, the compressor 3 is also provided with a second steam channel which is communicated with the medium-temperature photothermal system 8 through the second heat regenerator 11, the condenser 6 is provided with a condensate pipeline which is communicated with the evaporator 7 through the booster pump 4, then the evaporator 7 is further provided with a steam channel which is communicated with the medium-temperature photothermal system 8 through the second heat regenerator 11, the medium-temperature photothermal system 8 is also provided with a steam channel which is communicated with the high-temperature photothermal system 10 through the second compressor 9, the high-temperature photothermal system 10 is also provided with a steam channel which is communicated with the expander 1, the expander 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 7 through the heat regenerator 5 after the expander 1 is also provided with the low-pressure steam channel, and the evaporator 7 is divided into two paths, namely, the first path is communicated with the compressor 3 and the second path is communicated with the condenser 6; the condenser 6 is also provided with a cooling medium passage communicating with the outside, and the expander 1 connects the compressor 3 and the second compressor 9 and transmits power.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the high-pressure steam discharged by the evaporator 7 and the compressor 3 flows through the second heat regenerator 11 to absorb heat and raise temperature, and is then supplied to the medium-temperature photo-thermal system 8; the steam discharged by the high-temperature photo-thermal system 10 enters the expander 1 to perform decompression and work, flows through the second heat regenerator 11 to release heat and reduce temperature to a certain extent, enters the expander 1 to continue decompression and work, flows through the heat regenerator 5 to release heat and reduce temperature and is provided for the evaporator 7, and the photo-thermal co-single-working medium combined cycle steam power device is formed.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 9 is realized by the following steps:

(1) Structurally, in the photo-thermal integrated single-working-medium combined cycle steam power device shown in fig. 3, a steam channel of the second compressor 9 is communicated with the high-temperature photo-thermal system 10 through the second heat regenerator 11, so that the second compressor 9 is adjusted to be communicated with the high-temperature photo-thermal system 10 after the steam channel of the second compressor 9 is communicated with the photo-thermal power device through the second heat regenerator 11.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 3, the difference is that: the steam discharged by the medium-temperature photo-thermal system 8 enters the second compressor 9 to be boosted and heated, flows through the second heat regenerator 11 to absorb heat and heat to a certain extent, enters the second compressor 9 to be boosted and heated continuously, and is provided for the high-temperature photo-thermal system 10 to form the photo-thermal co-single-working medium combined cycle steam power device.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 10 is realized by the following steps:

(1) Structurally, in the photo-thermal integrated single-working-medium combined cycle steam power device shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, a condensate pipe of the condenser 6 is communicated with the booster pump 4, the condensate pipe of the condenser 6 is communicated with the low-temperature heat regenerator 13 through the second booster pump 12, a steam extraction channel is additionally arranged on the compressor 3 and is communicated with the low-temperature heat regenerator 13, and the condensate pipe of the low-temperature heat regenerator 13 is communicated with the booster pump 4.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 6 flows through the second booster pump 12 to be boosted and then enters the low-temperature regenerator 13 to be mixed with the extracted steam from the compressor 3, absorbs heat and heats up, and the extracted steam is released to form condensate; condensate of the low-temperature heat regenerator 13 flows through the booster pump 4 to boost pressure, and then enters the evaporator 7 to absorb heat to raise temperature and vaporize; the low-pressure steam discharged by the heat regenerator 5 and the second expander 2 flows through the evaporator 7 to release heat and cool, and then is divided into two paths, wherein the first path enters the compressor 3 to raise the pressure and the temperature, and the second path enters the condenser 6 to release heat and condense; the low-pressure steam enters the compressor 3 to be boosted and heated to a certain extent, and then is divided into two paths, namely a first path is provided for the low-temperature heat regenerator 13, and a second path is divided into two paths after the boosting and the heating are continued, namely the first path is provided for the heat regenerator 5 and the second path enters the medium-temperature photo-thermal system 8, so that the photo-thermal carrying same-single-working-medium combined cycle steam power device is formed.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 11 is realized by the following steps:

(1) In the combined cycle steam power plant with photo-thermal and single working medium shown in fig. 1, a second evaporator and a diffusion pipe are added, the communication between a low-pressure steam channel of a heat regenerator 5 and an evaporator 7 is adjusted to be that the low-pressure steam channel of the heat regenerator 5 is communicated with a second evaporator 14 through the evaporator 7, the communication between the low-pressure steam channel of a second expander 2 and the evaporator 7 is adjusted to be that the low-pressure steam channel of the second expander 2 is communicated with the second evaporator 14 through the evaporator 7, the communication between the low-pressure steam channel of the evaporator 7 and a compressor 3 and a condenser 6 is respectively adjusted to be that the low-pressure steam channel of the second evaporator 14 is respectively communicated with the compressor 3 and the condenser 6, the communication between the condenser 6 and the condenser 6 is adjusted to be that the condensate channel of the condenser 6 is communicated with the second evaporator 14 through the booster pump 4, and the second evaporator 14 is then the second evaporator 14 is further communicated with the evaporator 7 through the diffusion pipe 15.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 6 is boosted by the booster pump 4, is absorbed by the second evaporator 14 to be warmed, partially vaporized and accelerated, is reduced in speed and boosted by the diffuser pipe 15, and then enters the evaporator 7 to absorb heat and vaporize; low-pressure steam discharged by the heat regenerator 5 and the second expander 2 is gradually released and cooled through the evaporator 7 and the second evaporator 14, and then respectively enters the compressor 3 for boosting and heating and the condenser 6 for releasing heat and condensing, so that the photo-thermal co-single-working medium combined cycle steam power device is formed.

The photo-thermal co-single-working-medium combined cycle steam power plant shown in fig. 12 is realized by the following steps:

(1) Structurally, in the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, an expansion speed increaser a is added to replace an expander 1, a second expansion speed increaser B is added to replace a second expander 2, a dual-energy compressor C is added to replace a compressor 3, a newly added diffuser pipe D is added to replace a booster pump 4, and a second dual-energy compressor E is added to replace a second compressor 9.

(2) In the flow, compared with the photo-thermal integrated single-working-medium combined cycle steam power plant shown in fig. 1, the difference is that: part of low-pressure steam discharged by the evaporator 7 enters the dual-energy compressor C to be boosted, heated and decelerated to a certain extent and then is divided into two paths, wherein the first path is subjected to heat absorption and heating through the heat regenerator 5, and the second path is subjected to depressurization, work and acceleration through the second expansion speed increaser B and then is provided for the evaporator 7, and the second path is subjected to heat absorption and heating through the medium-temperature photo-thermal system 8 after the second path is subjected to continuous boosting and heating; condensate discharged by the condenser 6 flows through the newly added diffuser pipe D to be reduced in speed and boosted, flows through the evaporator 7 to absorb heat and raise temperature and vaporize, and then enters the medium-temperature photo-thermal system 8 to absorb heat and raise temperature; the steam discharged by the medium-temperature photo-thermal system 8 is boosted, warmed and slowed down by the second dual-energy compressor E, absorbed by the high-temperature photo-thermal system 10, decompressed, worked and slowed down by the expansion speed increaser A, released by the heat regenerator 5, cooled and then provided for the evaporator 7; the low-pressure steam discharged by the heat regenerator 5 and the second expansion speed increaser B flows through the evaporator 7 to release heat and cool, and then is divided into two paths, wherein the first path enters the dual-energy compressor C to raise the pressure and raise the temperature and reduce the speed, and the second path enters the condenser 6 to release heat and condense; the work output by the expansion speed increaser A and the second expansion speed increaser B is provided for the dual-energy compressor C, the second dual-energy compressor E and external power to form the photo-thermal co-single-working-medium combined cycle steam power device.

The photo-thermal carrying single-working-medium combined cycle steam power device provided by the invention has the following effects and advantages:

(1) The high-temperature photo-thermal and medium-temperature photo-thermal share an integrated thermal power system, the thermal power systems of different driving energy sources are combined into one, the construction cost of the thermal power system is saved, and the cost performance is high.

(2) And the cross-grade energy source carrying is realized between the high-temperature photo-thermal and the medium-temperature photo-thermal, the connection is flexible, and the temperature difference loss is reduced.

(3) The high-temperature photo-thermal and medium-temperature photo-thermal provide driving heat load links, so that the temperature difference loss is small, and the thermodynamic perfection is high.

(4) The medium-temperature photo-thermal is acted by means of the high-temperature photo-thermal, so that the utilization value of the conversion of the high-temperature photo-thermal into mechanical energy is obviously improved.

(5) The driving heat load realizes graded utilization in the single-working-medium combined cycle, obviously reduces irreversible loss of temperature difference, and has high heat-changing work efficiency and thermodynamic perfection.

(6) The medium-temperature photo-thermal can be used for or is beneficial to reducing the pressure-increasing ratio of the combined cycle, improving the flow of the cycle working medium and being beneficial to constructing a large-load photo-thermal single-working-medium combined cycle steam power device.

(7) The utilization degree of the temperature difference in the back heating link between gases (steam) is high, and the heat-changing work efficiency is improved.

(8) And in the regenerative link between the gas (steam) working medium and the liquid working medium, the flow rate of the gas working medium is large, the temperature change interval is relatively narrow, the irreversible loss of the temperature difference is reduced, and the heat-variable work efficiency is improved.

(9) By utilizing the characteristics of working media, the temperature difference utilization level in the heat transfer process is obviously improved by adopting a simple technical means, and the heat efficiency is improved.

(10) And a plurality of heat regeneration technical means are provided, so that the coordination of the device in the aspects of power, thermal efficiency, step-up ratio and the like is effectively improved.

(11) The flow is reasonable, the structure is simple, and the scheme is rich; is beneficial to improving the reasonable utilization level of energy and expanding the application range of the photo-thermal integrated single-working-medium combined cycle steam power device.

Claims

1. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor and a high-temperature photo-thermal system; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photothermal system (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photothermal system (8), the medium-temperature photothermal system (8) is also provided with a steam channel which is communicated with the high-temperature photothermal system (10) through the second compressor (9), the high-temperature photothermal system (10) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the heat regenerator (5), and the evaporator (7) is also provided with a low-pressure steam channel which is divided into two paths, namely a first path which is communicated with the compressor (3) and a second path which is communicated with the condenser (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

2. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expander, a second expander, a compressor, a booster pump, a regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor and a high-temperature photo-thermal system; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photothermal system (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photothermal system (8), the medium-temperature photothermal system (8) is also provided with a steam channel which is communicated with the high-temperature photothermal system (10) through the second compressor (9), the high-temperature photothermal system (10) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) after the heat regenerator (5) is communicated with the evaporator (7), and the low-pressure steam channel is also provided with the low-pressure steam channel which is divided into two paths-the first path which is communicated with the compressor (3) and the second path which is communicated with the condenser (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

3. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photothermal system (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photothermal system (8), the medium-temperature photothermal system (8) is also provided with a steam channel which is communicated with the high-temperature photothermal system (10) through the second compressor (9) and the second heat regenerator (11), the high-temperature photothermal system (10) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the second heat regenerator (11) and the heat regenerator (5), and the evaporator (7) is also provided with a low-pressure steam channel which is divided into two paths, namely the first path is communicated with the compressor (3) and the second path is communicated with the condenser (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

4. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photothermal system (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photothermal system (8), the medium-temperature photothermal system (8) is also provided with a steam channel which is communicated with the high-temperature photothermal system (10) through the second heat regenerator (11) and the second compressor (9), the high-temperature photothermal system (10) is also provided with a steam channel which is communicated with the evaporator (1), the expander (1) is also provided with a low-pressure steam channel which is divided into two paths, namely, the first path is communicated with the compressor (3) and the second path is communicated with the condenser (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

5. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photothermal system (8) through the second heat regenerator (11), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photothermal system (8) through the second heat regenerator (11), the medium-temperature photothermal system (8) is also provided with a steam channel which is communicated with the high-temperature photothermal system (10) through the second compressor (9), the high-temperature photothermal system (10) is also provided with a steam channel which is communicated with the expander (1), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the second heat regenerator (11) and the evaporator (5), and the low-pressure steam channel is also provided with the second path which is divided into two paths-first path which is communicated with the compressor (3) and the second path which is communicated with the evaporator (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

6. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photo-thermal system (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photo-thermal system (8), the medium-temperature photo-thermal system (8) is also provided with a steam channel which is communicated with the high-temperature photo-thermal system (10) through the second compressor (9) and the second heat regenerator (11), the high-temperature photo-thermal system (10) is also provided with a steam channel which is communicated with the expander (1), and the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the booster pump (4), and the evaporator (7) is also provided with a low-pressure steam channel which is communicated with the compressor (3) and the second heat regenerator (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

7. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photo-thermal system (8), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photo-thermal system (8), the medium-temperature photo-thermal system (8) is also provided with a steam channel which is communicated with the high-temperature photo-thermal system (10) through the second heat regenerator (11) and the second compressor (9), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the heat booster pump (5), and the evaporator (7) is also provided with a low-pressure steam channel which is divided into two paths, namely the first path and the second path (3) which is communicated with the evaporator (6); the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

8. The photo-thermal carrying and single-working-medium combined cycle steam power device mainly comprises an expansion machine, a second expansion machine, a compressor, a booster pump, a heat regenerator, a condenser, an evaporator, a medium-temperature photo-thermal system, a second compressor, a high-temperature photo-thermal system and a second heat regenerator; the compressor (3) is provided with a first steam channel which is communicated with the second expander (2) through the heat regenerator (5), the second expander (2) is also provided with a low-pressure steam channel which is communicated with the evaporator (7), the compressor (3) is also provided with a second steam channel which is communicated with the medium-temperature photo-thermal system (8) through the second heat regenerator (11), the condenser (6) is provided with a condensate pipeline which is communicated with the evaporator (7) through the booster pump (4), the evaporator (7) is further provided with a steam channel which is communicated with the medium-temperature photo-thermal system (8) through the second heat regenerator (11), the medium-temperature photo-thermal system (8) is also provided with a steam channel which is communicated with the high-temperature photo-thermal system (10) through the second compressor (9), the expander (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (7) through the evaporator (5) after the second heat regenerator (11) is communicated with the evaporator (7), and the low-pressure steam channel which is also provided with the evaporator (7) is communicated with the first evaporator (3) and the second condenser (6) through the second heat regenerator; the condenser (6) is also provided with a cooling medium channel which is communicated with the outside, and the expander (1) is connected with the compressor (3) and the second compressor (9) and transmits power to form a photo-thermal carrying same-single-working-medium combined cycle steam power device; wherein, or the expander (1) is connected with the compressor (3), the booster pump (4) and the second compressor (9) and transmits power.

9. The photo-thermal single-medium combined cycle steam power plant is characterized in that in the photo-thermal single-medium combined cycle steam power plant in claim 3 or claim 6, a steam channel of a second compressor (9) is communicated with a high-temperature photo-thermal system (10) through a second heat regenerator (11), and the second compressor (9) is regulated to be communicated with the high-temperature photo-thermal system (10) through the steam channel of the second heat regenerator (11) after the steam channel of the second compressor (9) is communicated with the photo-thermal system (10) again, so that the photo-thermal single-medium combined cycle steam power plant is formed.

10. A photo-thermal single-medium combined cycle steam power device is characterized in that a second booster pump and a low-temperature heat regenerator are added in any one of the photo-thermal single-medium combined cycle steam power devices in claims 1-9, a condensate pipeline of a condenser (6) is communicated with a booster pump (4) and is adjusted to be communicated with the low-temperature heat regenerator (13) through the second booster pump (12), a steam extraction channel is additionally arranged in the compressor (3) and is communicated with the low-temperature heat regenerator (13), and a condensate pipeline of the low-temperature heat regenerator (13) is communicated with the booster pump (4) to form the photo-thermal single-medium combined cycle steam power device.

11. In any one of the photo-thermal and single-working-medium combined cycle steam power devices described in claims 1 and 3-9, a second evaporator and a diffuser pipe are added, the communication between a low-pressure steam channel of a regenerator (5) and the evaporator (7) is adjusted to be that between the low-pressure steam channel of the regenerator (5) and the second evaporator (14) through the evaporator (7), the communication between the low-pressure steam channel of a second expander (2) and the evaporator (7) is adjusted to be that between the low-pressure steam channel of the second expander (2) and the second evaporator (14) through the evaporator (7), the communication between the low-pressure steam channel of the evaporator (7) and the compressor (3) and the condenser (6) is respectively adjusted to be that between the low-pressure steam channel of the second evaporator (14) and the compressor (3) and the condenser (6), the condensate pipe of the condenser (6) is adjusted to be that between the condensate pipe of the condenser (6) and the evaporator (7) through the booster pump (4) and the evaporator (7) is adjusted to be that between the condensate pipe of the condenser (6) and the evaporator (14) through the evaporator (14) and the second evaporator (14) through the evaporator (7), and the condensate pipe (15) is combined with the single-working-medium and the single-working-medium combined cycle steam power device.

12. In the photo-thermal single-working-medium combined cycle steam power device, a second evaporator and a diffuser pipe are added in the photo-thermal single-working-medium combined cycle steam power device, the low-pressure steam channel of the expander (1) is communicated with the evaporator (7) and is adjusted to be communicated with the expander (1) through the evaporator (7) and the second evaporator (14), the low-pressure steam channel of the second expander (2) is communicated with the evaporator (7) and is adjusted to be communicated with the second expander (2) through the evaporator (7) and the second evaporator (14), the low-pressure steam channel of the evaporator (7) is respectively communicated with the compressor (3) and the condenser (6) and is adjusted to be communicated with the compressor (3) and the condenser (6) through the booster pump (4) and is adjusted to be communicated with the condenser (6) through the booster pump (7) and is communicated with the condensate pipe of the condenser (6) through the booster pump (4) and the second evaporator (14) and is communicated with the second evaporator (14) through the condenser (14), and the low-pressure steam channel of the evaporator (7) is respectively communicated with the compressor (3) and the condenser (14) through the low-pressure pump (14), and the condensate pipe is respectively communicated with the condenser (6) and the condenser (6) through the condenser (3) and the low-pressure pump and the condenser (6) and the condensate pipe is communicated with the condenser.

13. A photo-thermal single-working-medium combined cycle steam power device is formed by adding an expansion speed increaser (A) and replacing an expansion machine (1), adding a second expansion speed increaser (B) and replacing a second expansion machine (2), adding a dual-energy compressor (C) and replacing a compressor (3), adding a newly added diffuser pipe (D) and replacing a booster pump (4), and adding a second dual-energy compressor (E) and replacing a second compressor (9) in any one of the photo-thermal single-working-medium combined cycle steam power devices in claims 1-12.