阅读说明：本技术 一种光热和余热耦合发电系统 (Photo-thermal and waste heat coupling power generation system ) 是由 张丹山 钟伟 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种光热和余热耦合发电系统,包括光热预热系统,余热蒸发系统和ORC发电装置；所述ORC发电装置包括依次串联的预热器、蒸发器、透平膨胀机、冷凝器和第一工质泵,所述透平膨胀机用以驱动发电机运行；所述余热蒸发系统通过蒸发器与ORC发电装置内有机工质进行热量交换；所述光热预热系统通过预热器与ORC发电装置内有机工质进行热量交换；所述光热预热系统包括和第二工质泵、光热集热器和储热水箱；所述光热集热器上还设置有尘屑清理装置。本发明能够提高光热和余热的耦合发电效率,经济效益高；设置有尘屑清理装置,对光热集热器的清洁效果好。(The invention discloses a photo-thermal and waste heat coupling power generation system, which comprises a photo-thermal preheating system, a waste heat evaporation system and an ORC power generation device; the ORC power generation device comprises a preheater, an evaporator, a turbo expander, a condenser and a first working medium pump which are sequentially connected in series, wherein the turbo expander is used for driving a generator to operate; the waste heat evaporation system exchanges heat with the organic working medium in the ORC power generation device through the evaporator; the photo-thermal preheating system exchanges heat with an organic working medium in the ORC power generation device through a preheater; the photo-thermal preheating system comprises a second working medium pump, a photo-thermal collector and a heat storage water tank; and the photo-thermal collector is also provided with a dust cleaning device. The invention can improve the coupling power generation efficiency of photo-thermal and waste heat, and has high economic benefit; the dust cleaning device is arranged, so that the cleaning effect on the photo-thermal heat collector is good.)

1. The utility model provides a light and heat and waste heat coupling power generation system which characterized in that: the system comprises a photo-thermal preheating system, a waste heat evaporation system and an ORC power generation device; the ORC power generation device comprises a preheater (1), an evaporator (2), a turbine expander (3), a condenser (5) and a first working medium pump (6) which are sequentially connected in series, wherein the turbine expander (3) is used for driving a generator (4) to operate; the waste heat evaporation system exchanges heat with the organic working medium in the ORC power generation device through the evaporator (2); the photo-thermal preheating system exchanges heat with organic working media in the ORC power generation device through the preheater (1);

the photo-thermal preheating system comprises a second working medium pump (9), a photo-thermal collector (10) and a heat storage water tank (11); the working medium outlet of the photo-thermal collector (10) is respectively connected with the working medium inlets of the heat storage water tank (11) and the preheater (1), the working medium outlet of the heat storage water tank (11) is also connected with the working medium inlet of the preheater (1), the working medium outlet of the preheater (1) is connected with the working medium inlet of the second working medium pump (9), and the working medium outlet of the second working medium pump (9) is respectively connected with the working medium inlets of the heat storage water tank (11) and the photo-thermal collector (10);

a first adjusting valve (16) is arranged between a working medium outlet of the photo-thermal collector (10) and a working medium inlet of the heat storage water tank (11), a second adjusting valve (17) is arranged between the working medium outlet of the photo-thermal collector (10) and the working medium inlet of the preheater (1), a third stop valve (18) is arranged between the working medium outlet of the heat storage water tank (11) and the working medium inlet of the preheater (1), a second stop valve (15) is arranged between a working medium outlet of the second working medium pump (9) and the working medium inlet of the heat storage water tank (11), and a first stop valve (14) is arranged between the working medium outlet of the second working medium pump (9) and the working medium inlet of the photo-thermal collector (10);

and a dust cleaning device is also arranged on the photo-thermal collector (10).

2. The photothermal and waste heat coupled power generation system of claim 1 wherein: the photo-thermal collector (10) comprises a groove type mirror surface (20) and a heat absorption pipe (21), and the dust cleaning device comprises a sector plate (22), a guide rod (23) and a screw rod (24); the guide rod (23) is arranged above the groove type mirror surface (20) in a spanning mode through a support (25), the sector plate (22) is in horizontal sliding fit with the guide rod (23), a screw hole (26) in threaded fit with the screw rod (24) is formed in the sector plate (22), the screw rod (24) is driven to rotate by a first motor (27) so as to drive the sector plate (22) to move transversely along the groove type mirror surface (20), and a first brush for cleaning the groove type mirror surface (20) is arranged below the sector plate (22).

3. The photothermal and waste heat coupled power generation system of claim 2 wherein: the pipe wall of the heat absorption pipe (21) is provided with a plurality of heat absorption columns (29), and the lower ends of the heat absorption columns (29) penetrate through the pipe wall of the heat absorption pipe (21) and enter the interior of the heat absorption pipe (21).

4. A photothermal and waste heat coupled power generation system according to claim 3 wherein: the section of the heat absorption column (29) is rhombic.

5. The photothermal and waste heat coupled power generation system of claim 4 wherein: the heat absorption columns (29) are uniformly distributed along the axial direction of the heat absorption pipe (21) and are distributed at equal angles along the circumferential direction of the heat absorption pipe (21); a transverse through rotating cavity (30) is formed in the sector plate (22), a second motor (31) drives a hollow roller (32) to rotate in the rotating cavity (30), and the hollow roller (32) is correspondingly sleeved on the outer side of the heat absorbing pipe (21); a second brush for cleaning the heat absorption pipe (21) is arranged on the inner wall of the hollow roller (32);

a plurality of spiral grooves (34) in a spiral space are arranged in the hollow roller (32), and third brushes for cleaning the heat absorption columns (29) are arranged in the spiral grooves (34); the pitch of the spiral grooves (34) is the same as the axial distribution distance of the heat absorption columns (29) along the heat absorption pipes (21), and the number of the spiral grooves (34) is the same as the number of the heat absorption columns (29) distributed along the circumferential direction of the heat absorption pipes (21).

6. The photothermal and waste heat coupled power generation system of claim 5 wherein: an arc-shaped groove (36) is formed below the sector plate (22), and an arc-shaped moving block (37) is horizontally and movably arranged in the arc-shaped groove (36); a third motor (39) for driving the cam (38) to rotate is arranged on one side of the sector plate (22); one side of the arc-shaped moving block (37) is elastically pressed against the inner wall of the arc-shaped groove (36) through a spring part (40), and the other side of the arc-shaped moving block (37) is abutted against the cam (38); the first brush is arranged on the lower cambered surface of the arc-shaped moving block (37).

7. The photothermal and waste heat coupled power generation system of claim 6 wherein: a cleaning water tank (41), an annular pipe (42) and an arc-shaped pipe (43) are arranged on one side of the fan-shaped plate (22); the annular pipe (42) is correspondingly sleeved on the outer side of the heat absorption pipe (21), and a plurality of first water spraying holes (44) which are annularly arranged are formed in the inner ring side of the annular pipe (42); a plurality of second water spray holes (45) which are arranged in an arc shape are arranged below the arc-shaped pipe (43); the annular pipe (42) and the arc-shaped pipe (43) are both communicated with the water outlet end of a water pipe (46), and the water inlet end of the water pipe (46) is sequentially connected with a water pump (47) and the cleaning water tank (41).

8. The photothermal and waste heat coupled power generation system of claim 7 wherein: a scraper (48) is arranged at the lower edge of one side of the sector plate (22).

9. The photothermal and waste heat coupled power generation system of claim 1 wherein: a turbine valve (12) is arranged between the working medium outlet of the evaporator (2) and the working medium inlet of the turboexpander (3), and a turbine bypass valve (13) is arranged between the working medium outlet of the evaporator (2) and the working medium outlet of the turboexpander (3).

10. A photothermal and waste heat coupled power generation system according to claim 9 wherein: a heat regenerator (19) is further arranged in the ORC power generation device, and working media in the ORC power generation device sequentially pass through the heat regenerator (19), the condenser (5) and the first working medium pump (6), then return to the heat regenerator (19) and enter the preheater (1).

Technical Field

The invention relates to the technical field of power generation, in particular to a photo-thermal and waste heat coupling power generation system.

Background

At present, the energy consumption of China is about 40 hundred million tons of standard coal every year, and 30-60% of energy is directly discharged in different industries in the form of waste heat. Domestic waste heat resources with the temperature of more than 300 ℃ have a mature technical scheme of waste heat boiler and steam turbine recovery in the market. And the medium-low temperature waste heat with the temperature below 300 ℃ has no mature recovery scheme generally accepted by the market, and has important significance for realizing high-efficiency recovery and utilization of energy conservation and emission reduction.

Solar energy is energy generated by a continuous nuclear fusion reaction process of black seeds in or on the surface of the sun. The average solar radiation intensity on the earth orbit is 1369 w/square meter. The circumference of the earth's equator is 40000km, so that it can be calculated that the energy acquired by the earth can reach 173000 TW. The standard peak intensity at sea level is 1kw/m2, the annual average radiation intensity at one point on the earth's surface for 24 hours is 0.20 kw/square meter, corresponding to 102000TW of energy.

The organic Rankine cycle power generation device can obtain higher vapor pressure under the low temperature condition (80-300 ℃) by utilizing the low boiling point characteristic of organic working media (such as R134a, R245fa and the like), push an expansion machine to work, and drive a generator to generate power, so that the conversion from low-grade heat energy to high-grade electric energy is realized.

The solar photovoltaic power generation energy is greatly influenced by climate and day and night, and the power generation is extremely inconstant. Therefore, energy storage devices must be provided, which not only increases the technical difficulties but also increases the cost. Although various battery energy storage systems are manufactured at present, the manufacturing cost is high, and the battery treatment brings the problem of environmental pollution.

The industrial waste heat resources in China are rich, the temperature of a plurality of waste heat resources is low, and the problems of low waste heat power generation efficiency and difficult utilization exist.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a photo-thermal and waste-heat coupling power generation system which can improve the photo-thermal and waste-heat coupling power generation efficiency, has high economic benefit, is provided with a dust cleaning device and has a good cleaning effect on a photo-thermal heat collector.

The technical scheme is as follows: in order to achieve the purpose, the photo-thermal and waste heat coupling power generation system comprises a photo-thermal preheating system, a waste heat evaporation system and an ORC power generation device; the ORC power generation device comprises a preheater, an evaporator, a turbo expander, a condenser and a first working medium pump which are sequentially connected in series, wherein the turbo expander is used for driving a generator to operate; the waste heat evaporation system exchanges heat with the organic working medium in the ORC power generation device through the evaporator; the photo-thermal preheating system exchanges heat with an organic working medium in the ORC power generation device through a preheater; the photo-thermal preheating system comprises a second working medium pump, a photo-thermal collector and a heat storage water tank; the working medium outlet of the photo-thermal collector is respectively connected with the working medium inlets of the heat storage water tank and the preheater, the working medium outlet of the heat storage water tank is also connected with the working medium inlet of the preheater, the working medium outlet of the preheater is connected with the working medium inlet of the second working medium pump, and the working medium outlet of the second working medium pump is respectively connected with the working medium inlets of the heat storage water tank and the photo-thermal collector; a first regulating valve is arranged between the working medium outlet of the photo-thermal collector and the working medium inlet of the heat storage water tank, a second regulating valve is arranged between the working medium outlet of the photo-thermal collector and the working medium inlet of the preheater, a third stop valve is arranged between the working medium outlet of the heat storage water tank and the working medium inlet of the preheater, a second stop valve is arranged between the working medium outlet of the second working medium pump and the working medium inlet of the heat storage water tank, and a first stop valve is arranged between the working medium outlet of the second working medium pump and the working medium inlet of the photo-thermal collector; and the photo-thermal collector is also provided with a dust cleaning device.

Furthermore, the photo-thermal collector comprises a groove type mirror surface and a heat absorption pipe, and the dust cleaning device comprises a sector plate, a guide rod and a screw rod; the guide rod is arranged above the groove type mirror surface in a spanning mode through a support, the sector plate is in horizontal sliding fit with the guide rod, a screw hole in threaded fit with the screw rod is formed in the sector plate, the screw rod is driven to rotate by the first motor so as to drive the sector plate to move transversely along the groove type mirror surface, and a first brush for cleaning the groove type mirror surface is arranged below the sector plate.

Furthermore, the tube wall of the heat absorption tube is provided with a plurality of heat absorption columns, and the lower ends of the heat absorption columns penetrate through the tube wall of the heat absorption tube and enter the interior of the heat absorption tube.

Further, the section of the heat absorption column is in a diamond shape.

Furthermore, the heat absorption columns are uniformly distributed along the axial direction of the heat absorption pipe and are distributed at equal angles along the circumferential direction of the heat absorption pipe; a transverse through rotating cavity is formed in the sector plate, a second motor drives the hollow roller to rotate in the rotating cavity, and the hollow roller is correspondingly sleeved on the outer side of the heat absorption pipe; a second brush for cleaning the heat absorption pipe is arranged on the inner wall of the hollow roller; a plurality of spiral grooves in a spiral space are arranged in the hollow roller, and a third brush for cleaning the heat absorption column is arranged in each spiral groove; the pitch of the spiral grooves is the same as the distance of the heat absorption columns distributed along the axial direction of the heat absorption pipe, and the number of the spiral grooves is the same as the number of the heat absorption columns distributed along the circumferential direction of the heat absorption pipe.

Furthermore, an arc-shaped groove is arranged below the sector plate, and an arc-shaped motion block is horizontally and movably arranged in the arc-shaped groove; a third motor for driving the cam to rotate is arranged on one side of the sector plate; one side of the arc-shaped motion block is elastically pressed against the inner wall of the arc-shaped groove through a spring part, and the other side of the arc-shaped motion block is abutted against the cam; the first brush is arranged on the lower arc surface of the arc-shaped motion block.

Furthermore, a cleaning water tank, an annular pipe and an arc-shaped pipe are arranged on one side of the sector plate; the annular pipe is correspondingly sleeved on the outer side of the heat absorption pipe, and a plurality of first water spray holes which are annularly arranged are arranged on the inner ring side of the annular pipe; a plurality of second water spray holes which are arranged in an arc shape are arranged below the arc-shaped pipe; the annular pipe and the arc-shaped pipe are both communicated with the water outlet end of the water delivery pipe, and the water inlet end of the water delivery pipe is sequentially connected with the water pump and the cleaning water tank.

Further, a scraper is arranged on the lower edge of one side of the sector plate.

Furthermore, a turbine valve is arranged between the working medium outlet of the evaporator and the working medium inlet of the turboexpander, and a turbine bypass valve is arranged between the working medium outlet of the evaporator and the working medium outlet of the turboexpander.

Furthermore, a heat regenerator is further arranged in the ORC power generation device, and working media in the ORC power generation device sequentially pass through the heat regenerator, the condenser and the first working medium pump, then return to the heat regenerator and enter the preheater.

Has the advantages that: the photo-thermal and waste heat coupling power generation system has the beneficial effects that:

1) the photothermal preheating system and the preheater in the ORC power generation device exchange heat, and the waste heat evaporation system and the evaporator in the ORC power generation device exchange heat, so that the photothermal and waste heat coupled power generation is realized, and the economic benefit is high;

2) the heat storage water tank of the photo-thermal preheating system can enable the heat collected by the photo-thermal collector to continuously heat the preheater, so that the system is stable in power generation, and the discontinuity of photo-thermal power generation is effectively avoided;

3) the photo-thermal preheating system is internally provided with a photo-thermal collector, the photo-thermal collector comprises a groove type mirror surface and a heat absorption pipe, the heat absorption pipe is provided with a heat absorption column, the heat absorption effect of the heat absorption pipe can be improved, the photo-thermal collector is also provided with a dust cleaning device, and the dust cleaning device can clean dust on the groove type mirror surface and the heat absorption pipe simultaneously, so that the photo-thermal collector can keep a good working state.

Drawings

FIG. 1 is a system wiring diagram of the present invention;

FIG. 2 is a schematic diagram of a system with a regenerator;

FIG. 3 is a schematic view of the overall structure of the dust cleaning device;

FIG. 4 is a schematic view of the overall structure of the dust cleaning device;

FIG. 5 is a schematic structural view of a hollow drum;

FIG. 6 is a schematic structural view of the arc motion block and the arc slot;

FIG. 7 is a schematic view showing the connection of the ring pipe, the arc pipe, the water pump and the clean water tank;

FIG. 8 is a schematic structural view of a heat absorption column.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The photo-thermal and waste heat coupling power generation system as shown in fig. 1 to 8 comprises a photo-thermal preheating system, a waste heat evaporation system and an ORC power generation device.

The ORC power generation device comprises a preheater 1, an evaporator 2, a turbine expander 3, a condenser 5 and a first working medium pump 6 which are sequentially connected in series, wherein the turbine expander 3 is used for driving a generator 4 to operate.

The waste heat evaporation system exchanges heat with organic working media in the ORC power generation device through the evaporator 2, the waste heat evaporation system comprises a waste heat source input 7 and a waste heat source output 8, a heat source coming out of the waste heat source input 7 of the waste heat evaporation system enters the evaporator 2 to heat and evaporate circulating working media of the ORC power generation device, and then the circulating working media return to the waste heat production device through the waste heat source return 8 to complete a cycle. The waste heat source may be hot water, steam, process fluid media, etc.

And the photo-thermal preheating system exchanges heat with the organic working medium in the ORC power generation device through the preheater 1.

The working medium pipeline in the photo-thermal preheating system is shown in attached figures 1 and 2, and the photo-thermal preheating system comprises a second working medium pump 9, a photo-thermal heat collector 10 and a heat storage water tank 11; the working medium export of light and heat collector 10 connects the working medium import of heat storage water tank 11 and pre-heater 1 respectively, the working medium import of pre-heater 1 is also connected in the working medium export of heat storage water tank 11, the working medium import of the working medium exit linkage second working medium pump 9 of pre-heater 1, the working medium import of heat storage water tank 11 and light and heat collector 10 is connected respectively in the working medium export of second working medium pump 9, and working medium import and export in this pre-heater 1 all refers to the working medium that is linked together with the working medium pipeline in the light and heat preheating system and imports and exports.

The working medium of light and heat collector 10 export with be provided with first governing valve 16 between the working medium import of heat storage water tank 11, the working medium of light and heat collector 10 export with be provided with second governing valve 17 between the working medium import of pre-heater 1, the working medium export of heat storage water tank 11 with be provided with third stop valve 18 between the working medium import of pre-heater 1, the working medium export of second working medium pump 9 with be provided with second stop valve 15 between the working medium import of heat storage water tank 11, the working medium export of second working medium pump 9 with be provided with first stop valve 14 between the working medium import of light and heat collector 10.

And the circulating working medium of the photo-thermal preheating system is water. When the heat storage water tank 11 is used for heat accumulation, the first stop valve 14 and the third stop valve 18 are opened, the second stop valve 15 is closed, medium circulating water enters the preheater 1 and the heat storage water tank 11 through the first regulating valve 16 and the second regulating valve 17 respectively after absorbing heat at the photo-thermal heat collector 10, and then passes through the second working medium pump 9 to complete a cycle. When the heat storage water tank 11 releases heat, the first stop valve 14, the first regulating valve 16 and the second regulating valve 17 are closed, the second stop valve 15 and the third stop valve 18 are opened, the circulating water absorbs the heat released by the heat storage water tank 11, the heat is brought to the preheater 1 and then enters the pump 9, and a cycle is completed.

The photothermal heat collector 10 is also provided with a dust cleaning device.

As shown in fig. 3 and 4, the photothermal collector 10 is a trough collector, and the photothermal collector 10 includes a trough mirror 20 and a heat absorbing pipe 21, the heat absorbing pipe 21 is disposed over the trough mirror 20, and circulating water passes through the heat absorbing pipe 21 and absorbs photothermal reflected by the trough mirror 20. The dust cleaning device comprises a sector plate 22, a guide rod 23 and a screw 24, wherein supports 25 are arranged on two sides of the groove type mirror surface 20, the guide rod 23 is arranged above the groove type mirror surface 20 in a crossing mode through the supports 25, and the guide rod 23 is located above the heat absorbing pipe 21 so as to avoid blocking light rays reflected to the heat absorbing pipe 21 from the groove type mirror surface 20. The sector plate 22 is in horizontal sliding fit with the guide rod 23, a screw hole 26 in threaded fit with the screw 24 is formed in the sector plate 22, the screw 24 is driven to rotate by a first motor 27, and the screw 24 is arranged between the guide rod 23 and the heat absorption pipe 21. When the screw 24 rotates, the fan-shaped plate 22 can be driven to move transversely along the trough mirror 20, and a first brush for cleaning the trough mirror 20 is arranged below the fan-shaped plate 22, so that dust on the surface of the trough mirror 20 can be cleaned.

The tube wall of the heat absorbing tube 21 is provided with a plurality of heat absorbing columns 29, the lower ends of the heat absorbing columns 29 penetrate through the tube wall of the heat absorbing tube 21 and enter the interior of the heat absorbing tube 21, and the arrangement of the heat absorbing columns 29 can improve the heat absorbing area of the heat absorbing tube 21, so that the heat absorbing tube 21 can better absorb the light and heat reflected by the groove type mirror surface 20.

The section of the heat absorption column 29 is a diamond shape, so that the heat absorption area is further increased, and the heat absorption effect of the heat absorption column 29 is improved.

As shown in fig. 8, a plurality of the heat absorption columns 29 are uniformly distributed along the axial direction of the heat absorption pipe 21, and are equiangularly distributed along the circumferential direction of the heat absorption pipe 21. The sector plate 22 is provided with a transversely through rotating cavity 30, a second motor 31 drives a hollow roller 32 to rotate in the rotating cavity 30, and the hollow roller 32 is correspondingly sleeved on the outer side of the heat absorbing pipe 21. The inner wall of the hollow roller 32 is provided with a second brush for cleaning the heat absorption pipe 21. A plurality of spiral grooves 34 are arranged in the hollow roller 32, and a third brush for cleaning the heat absorption column 29 is arranged in each spiral groove 34. The pitch of the spiral grooves 34 is the same as the axial distribution distance of the heat absorption columns 29 along the heat absorption tubes 21, and the number of the spiral grooves 34 is the same as the circumferential distribution number of the heat absorption columns 29 along the heat absorption tubes 21, so that the third hairbrushes in the spiral grooves 34 can clean the heat absorption columns 29.

When the sector plate 22 is driven by the screw 24 to move transversely along the slot mirror surface 20, the second motor 31 also drives the hollow roller 32 to rotate, so that the first brush cleans the slot mirror surface 20, the second brush cleans the outer wall of the heat absorption pipe 21, and the third brush cleans the heat absorption column 29.

As shown in fig. 6, an arc-shaped groove 36 is arranged below the sector plate 22, and an arc-shaped motion block 37 is horizontally movably arranged in the arc-shaped groove 36. A third motor 39 for driving the cam 38 to rotate is provided at one side of the sector plate 22. One side of the arc-shaped moving block 37 is elastically pressed against the inner wall of the arc-shaped groove 36 through a spring part 40, and the other side of the arc-shaped moving block 37 is abutted against the cam 38. The first brush is disposed at a lower arc surface of the arc motion block 37. When the sector plate 22 is moved laterally, the arc-shaped moving block 37 is horizontally reciprocated by the cam 38 and the spring member 40, so that the first brush is laterally reciprocated in the slot mirror 20, thereby enhancing the cleaning effect.

As shown in fig. 7, one side of the sector plate 22 is provided with a cleaning water tank 41, an annular pipe 42, and an arc pipe 43. The annular pipe 42 is correspondingly sleeved on the outer side of the heat absorbing pipe 21, and a plurality of first water spray holes 44 which are annularly arranged are arranged on the inner ring side of the annular pipe 42. A plurality of second water spray holes 45 which are arranged in an arc shape are arranged below the arc-shaped pipe 43; the annular pipe 42 and the arc-shaped pipe 43 are both communicated with the water outlet end of a water pipe 46, and the water inlet end of the water pipe 46 is sequentially connected with a water pump 47 and the cleaning water tank 41. The water pump 47 sprays the water in the cleaning water tank 41 from the first and second water spray holes 44 and 45 onto the heat absorbing pipe 21 and the trough mirror 20, thereby improving the cleaning effect.

The lower edge of one side of the sector plate 22 is provided with a scraper 48, and the scraper 48 scrapes water drops gathered on the groove type mirror surface 20 from one side of the groove type mirror surface 20, so that the water drops are prevented from remaining on the groove type mirror surface 20, and the cleaning effect is improved.

A turbine valve 12 is arranged between the working medium outlet of the evaporator 2 and the working medium inlet of the turboexpander 3, and a turbine bypass valve 13 is arranged between the working medium outlet of the evaporator 2 and the working medium outlet of the turboexpander 3.

The ORC power generation device is characterized in that a heat regenerator 19 is further arranged, working media in the ORC power generation device sequentially pass through the heat regenerator 19, the condenser 5 and the first working medium pump 6, then return to the heat regenerator 19 and enter the preheater 1, and the heat regenerator 19 further improves the power generation efficiency of the photo-thermal and waste heat coupling power generation system.

The opening and closing of the turbine valve 12 and the turbine bypass valve 13 in the ORC power generation device can realize the conversion between the turbine bypass and the power generation mode of the organic Rankine cycle power generation device. The working medium of the ORC power generation device absorbs heat of light and heat and waste heat from the preheater 1 and the evaporator 2, the heat enters the turbine expander 3 through the turbine valve 12, and the turbine expander 3 drives the generator to complete a power generation mode. The working medium sequentially enters the heat regenerator 19, the condenser 5 and the working medium pump 6, and then enters the preheater 1 again after passing through the heat regenerator 19, so that working medium circulation of the ORC power generation device in a power generation mode is completed. The working medium of the ORC power generation device absorbs heat of light and heat and waste heat from the preheater 1 and the evaporator 2, passes through the turbine bypass valve 13, is subjected to throttling expansion, sequentially enters the heat regenerator 19, the condenser 5 and the working medium pump 6, and re-enters the preheater 1 after passing through the heat regenerator 19, so that working medium circulation of a turbine bypass mode of the ORC power generation device is completed.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.