CN116242039A - A solar energy, hot water boiler and heat pump coupled energy supply system - Google Patents

Abstract

The invention discloses a coupled energy supply system of solar energy, a hot water boiler and a heat pump, comprising a solar energy concentrating heat collection device, a molten salt tank, a fossil fuel hot water boiler, a heat pump device, a steam turbine, heat exchange equipment and the like. The system uses solar molten salt heat storage as the main energy source and effectively couples fossil fuel hot water boilers with mechanical power to drive heat pumps. It uses solar molten salt heat storage to generate high-temperature and high-pressure steam, and then drives steam turbines to generate electricity. At the same time, steam turbines are used to extract steam. Drive the heat pump to effectively use low-grade energy; use the flue gas heat exchanger and heat pump to recover the heat of the flue gas and transfer it to the condensate water and the heating return water respectively, so as to realize the full utilization of the heat of the flue gas. On the whole, the system has the advantages of multi-energy coupling and complementary energy saving and emission reduction, fully reflects the energy potential matching, realizes the cascade utilization of energy, and can simultaneously generate steam, electric energy, hot water and other energy sources.

Description

A solar energy, hot water boiler and heat pump coupled energy supply system

technical field

The invention belongs to the technical field of multi-energy complementary coupling, and relates to a solar energy, hot water boiler and heat pump coupled energy supply system. , a set of hot water system.

Background technique

Energy is the cornerstone of human survival and development, and an important guarantee for sustainable economic and social development and national security. In view of the current situation of energy utilization, vigorously developing clean, low-carbon, and efficient energy utilization methods is the main way to change the energy structure. Solar energy is a kind of renewable energy with abundant reserves, wide distribution, clean and environmental protection, and the use of solar energy is of great significance to emission reduction. Solar thermal power generation is one of the ways to effectively utilize solar energy. The solar radiant energy is collected and heated by the concentrating heat collection device to heat the heat transfer fluid, and the heat transfer fluid exchanges heat with water to generate high-temperature and high-pressure steam to drive the steam turbine to generate power; solar thermal power generation has three types: trough type, tower type and dish type At present, the trough solar thermal system has been commercially applied; the trough system generally uses heat transfer oil as the heat transfer fluid, and the operating temperature of the heat transfer oil is about 400 ° C, and the temperature of the steam generated is relatively low. Solar energy has the characteristics of intermittent, greatly affected by day and night, weather, and unstable. In the prior art, the trough-type molten salt photothermal power generation system uses molten salt as a heat transfer and heat storage medium; the operating temperature of molten salt is about 550°C, which can generate higher temperature steam, and molten salt is also an excellent storage medium. Thermal medium can solve the problem of solar energy instability.

According to the research, the exhaust heat loss accounts for the largest proportion of the boiler heat loss, and the latent heat of vaporization of the water vapor in the exhaust smoke is not fully utilized, resulting in a certain amount of heat loss. As a high-efficiency and energy-saving device that can make full use of low-grade heat energy, heat pump has attracted extensive attention. The working principle of the heat pump is to force the heat of the low-temperature object to flow to the high-temperature object in a reverse cycle. Only a small amount of work can be consumed to obtain a large heat supply, and the low-grade heat energy that is difficult to use can be effectively used. Heat pump performance is generally evaluated by the COP coefficient of performance. Usually, the cooling coefficient of a heat pump is about 3-4, that is to say, the heat pump can transfer 3 to 4 times the heat energy required by itself from a low-temperature object to a high-temperature object. In the application, it can be considered to combine the heat pump with some low-grade heat sources to realize the full utilization of energy.

The multi-energy complementary coupling system refers to the use of different energy sources that complement each other in terms of grade, time, space, price, and supply stability, and comprehensively utilizes traditional energy and renewable energy to provide energy such as electricity, gas, and hot water. Reduce carbon emissions. Prioritize the use of renewable energy in the system and reduce dependence on traditional energy. Carry out cascade comprehensive utilization of energy according to the level of taste to achieve "corresponding temperature and quality". This system is of great significance to the improvement of energy system utilization efficiency and energy saving and emission reduction. Therefore, how to reasonably and efficiently couple various energy sources to realize cascade comprehensive utilization of energy is one of the problems faced by multi-energy complementary coupling technology.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a solar energy, hot water boiler and heat pump coupling energy supply system, which uses solar energy as the main energy source and effectively couples the hot water boiler and heat pump to deeply recover the waste heat of flue gas and realize energy The cascade utilization can generate 3 energy sources of electricity, steam and hot water at the same time.

The present invention is achieved through the following technical solutions:

A solar energy, hot water boiler and heat pump coupling energy supply system, including a solar thermal power generation system, a heat pump circulation loop and a hot water boiler, the solar thermal power generation system includes a molten salt circulation loop and a circulating water circuit; the heat pump circulation loop Including heat pump evaporator;

The molten salt circulation loop includes a solar thermal collector, a high-temperature molten salt tank, a superheater, a steam generator and a low-temperature molten salt tank; the outlet of the low-temperature molten salt tank is connected to the inlet of the solar thermal collector, and the solar collector The outlet of the heating device is sequentially connected to the high-temperature molten salt tank and the inlet of the molten salt side of the superheater, and the outlet of the molten salt side of the superheater is connected to the molten salt side of the steam generator and the inlet of the low-temperature molten salt tank in sequence;

The circulating water circuit includes a flue gas heat exchanger, steam turbine 1, a driving generator and a condenser, the water side outlet of the condenser is connected to the water side inlet of the flue gas heat exchanger, and the flue gas heat exchanger The water side outlet of the device is connected with the water side of the steam generator and the water side inlet of the superheater in turn, and the water side outlet of the superheater is connected with the steam turbine one and the steam side inlet of the condenser; The flue gas outlet is connected with the flue gas side of the flue gas heat exchanger and the flue gas side inlet of the heat pump evaporator.

Preferably, the heat pump cycle further includes a condenser and a compressor, the steam side outlet of the condenser is connected to the steam side inlet of the heat pump evaporator, and the steam side outlet of the heat pump evaporator is connected with the compressor and the condenser in turn. Steam side inlet connection.

Preferably, the flue gas side outlet of the heat pump evaporator is connected to a chimney, and a throttle valve is arranged between the heat pump evaporator and the condenser.

Preferably, a low-temperature molten salt pump is provided between the outlet of the low-temperature molten salt tank and the inlet of the solar heat collection device, and a valve one is provided at the outlet of the low-temperature molten salt pump; the solar heat collection device is a trough type structure.

Preferably, a high temperature molten salt pump is provided between the outlet of the high temperature molten salt tank and the molten salt side inlet of the superheater, and a valve 2 is provided between the inlet of the high temperature molten salt pump and the outlet of the high temperature molten salt tank.

Preferably, a condensate pump is provided between the condenser and the flue gas heat exchanger, and a valve three is provided at the inlet of the condensate pump.

Preferably, the compressor is connected to the steam turbine two; the exhaust steam side of the steam turbine one is connected to the exhaust steam outlet of the steam turbine two; the steam inlet of the steam turbine two is connected to the steam extraction outlet of the steam turbine one The exhaust steam side outlet of steam turbine 1 is connected to the steam side inlet of the condenser.

Preferably, a valve five is set between the first steam turbine and the second steam turbine; a generator is set at one end of the first steam turbine.

Preferably, the condenser, the hot water boiler and the condenser are connected in sequence to form a hot water supply circulation pipeline.

Preferably, the inlet of the heat supply and return water side of the condenser is provided with a heat supply and return water pump and a valve four.

Compared with the prior art, the present invention has the following beneficial technical effects:

The invention discloses a solar energy, hot water boiler and heat pump coupled energy supply system. The system uses solar molten salt heat storage as the main energy source and effectively couples the fossil fuel hot water boiler and mechanical power to drive the heat pump, and utilizes solar molten salt heat storage. Generate high-temperature and high-pressure steam, and then drive the steam turbine to generate electricity. At the same time, use the steam turbine to extract steam to drive the heat pump to effectively use low-grade energy; use the flue gas heat exchanger and heat pump to recover the heat of the flue gas and transfer it to the condensed water and the heat supply return water respectively to realize Full utilization of flue gas heat. On the whole, the system has the advantages of multi-energy coupling and complementary energy saving and emission reduction, fully reflects the energy potential matching, realizes the cascade utilization of energy, and can simultaneously generate steam, electric energy, hot water and other energy sources. This system uses a molten salt trough solar thermal power generation system, which makes full use of renewable energy and realizes the use of solar energy at medium and high temperatures. Compared with the traditional way of steam power generation by boilers, it has the advantages of energy saving and emission reduction. The heat storage method of molten salt effectively solves the problem of strong fluctuation and instability of solar energy affected by day and night and weather.

Furthermore, as high-grade energy, the superheated steam generated by the superheater in this system first enters the steam turbine to generate power, and the exhausted steam enters the condenser to release the latent heat of vaporization and become condensed water. The flue gas discharged from the boiler first enters the flue gas heat exchanger to heat the condensed water, and then enters the heat pump evaporator to reuse the low-grade heat of the flue gas. On the whole, the cascade utilization of steam and flue gas waste heat is realized, and the energy utilization efficiency of the system is improved.

Furthermore, the heat pump in this system is driven by steam, and the steam comes from the extracted steam in the steam turbine. Compared with the electric drive heat pump, it saves electric energy and achieves the purpose of energy saving.

Furthermore, the heating return water in this system passes through the condenser, the heat pump condenser and the fossil fuel hot water boiler successively for cascaded heating. The fuel for the fossil fuel hot water boiler can be but not limited to coal, oil, natural gas, etc. , reflecting the multi-fuel characteristics of the system.

Further, the system can simultaneously provide three energy sources of electric energy, steam, and hot water.

Description of drawings

Fig. 1 is a schematic diagram of a solar energy, hot water boiler and heat pump coupled energy supply system;

In the figure: 1-solar collector, 2-valve 1, 3-low temperature molten salt pump, 4-low temperature molten salt tank, 5-steam generator, 6-superheater, 7-high temperature molten salt pump, 8-valve Two, 9-high temperature molten salt tank, 10-hot water boiler, 11-flue gas heat exchanger, 12-condensate water pump, 13-valve three, 14-valve five, 15-turbine one, 16-generator 17-condensate Evaporator, 18-heat supply and return pump, 19-valve four, 20-heat pump evaporator, 21-throttle valve, 22-compressor, 23-turbine two, 24-chimney, 25-condenser.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

The invention provides a coupled energy supply system of solar energy, hot water boiler and heat pump. The molten salt is heated to about 550°C through a trough solar heat collector, and the molten salt exchanges heat with water to generate superheated steam, which drives a turbogenerator set to generate electricity. . The boiler flue gas waste heat is used to preheat the feed water entering the steam generator, and the heat pump device is used to absorb the low-grade flue gas heat again to make full use of the flue gas heat. The compressor in the heat pump device is driven by steam, and the steam comes from the extracted steam in the steam turbine to achieve the purpose of energy saving. The heating return water is heated by exhaust steam, heat pump and hot water boiler in sequence to realize cascade heating. The invention uses solar energy as the main energy source and effectively couples the hot water boiler and the heat pump to deeply recover the waste heat of the flue gas, realize the cascade utilization of energy, and simultaneously generate three kinds of energy sources: electric energy, steam and hot water.

Including trough solar collector 1, high temperature molten salt tank 9, superheater 6, steam generator 5, low temperature molten salt tank 4, steam turbine 15, generator 16, condenser 17, flue gas heat exchanger 11 , heat pump device, steam turbine 223, fossil fuel hot water boiler 10, chimney 24. The trough solar collector 1, the high temperature molten salt tank 9, the superheater 6, the steam generator 5, the low temperature molten salt tank 4, the steam turbine 15, the generator 16, and the condenser 17 form a solar thermal power generation system . The low-temperature molten salt flows out from the low-temperature molten salt tank 4 , is heated by the trough solar collector 1 to become high-temperature molten salt, and flows to the high-temperature molten salt tank 9 . The high-temperature molten salt flows through the superheater 6 and the steam generator 5 in sequence, and the low-temperature molten salt generated after heat exchange flows into the low-temperature molten salt tank 4 to form a molten salt circulation loop. The condensed water coming out of the condenser 17 first enters the flue gas heat exchanger 11, and then enters the steam generator 5 and the superheater 6 in turn to generate superheated steam. The superheated steam enters the steam turbine 15 to do work, drives the generator 16 to generate electricity, and the exhausted steam enters the condenser 17 to condense to form a circulating water circuit.

A low temperature molten salt pump 3 and a valve one 2 are arranged between the low temperature molten salt tank 4 and the trough solar collector 1 . A high temperature molten salt pump 7 and a valve 2 8 are arranged between the high temperature molten salt tank 9 and the superheater 6 . A condensate pump 12 and a valve three 13 are arranged between the condenser 17 and the flue gas heat exchanger 11 in the circulating water circuit. The molten salt pump and water pump provide power for the flow of molten salt and water, and the valves are used for flow regulation.

The heat pump device includes a condenser 25, a throttle valve 21, an evaporator 20 and a compressor 22, which are connected in sequence to form a heat pump circulation loop.

The flue gas side outlet of the flue gas heat exchanger 11 is connected to the flue gas side inlet of the heat pump evaporator 20 , and the flue gas side outlet of the heat pump evaporator 20 is connected to the chimney 24 .

The condenser 17, the evaporator 25 and the condenser 25 are connected in sequence to form a hot water supply circulation pipeline. A heat supply return pump 18 and a valve four 19 are arranged on the hot water circulation pipeline. The heating return pump powers the flow of heating return water, and the valves are used to regulate the flow.

The compressor 22 in the heat pump circulation loop is driven by mechanical work, specifically steam work. The steam comes from steam extraction in steam turbine one 15, and enters steam turbine two 23 through the steam extraction pipeline to do work, and the blades of the steam turbine rotate to drive the compressor to work. The exhausted steam after work is mixed with the exhausted steam from the steam turbine one 15 and flows into the condenser 17 through the pipeline for condensation. A valve five 14 is arranged in the air extraction pipeline for adjusting the steam extraction volume.

The flue gas is discharged from the fossil fuel hot water boiler 10 , passes through the flue gas heat exchanger 11 and the heat pump evaporator 20 sequentially along the flue gas flow channel, and is discharged into the atmosphere through the chimney 24 after cascaded utilization. The high-temperature flue gas preheats the feed water entering the steam generator 5 in the flue gas heat exchanger 11; the flue gas flowing out of the heat exchanger enters the heat pump evaporator 20 again, and the heat pump circulating working medium utilizes the heat of low-grade flue gas to absorb heat and evaporate . This process makes full use of the waste heat of the flue gas.

The heat supply and return water adopts the method of cascade heating. The heat supply return water absorbs the heat of the exhaust steam through the condenser 17; then the supply hot water flowing out of the condenser enters the heat pump condenser 25 to absorb the heat released when the heat pump working medium condenses; then the supply hot water flowing out of the condenser enters The hot water boiler 10 is heated by the heat released by fuel combustion. The high-temperature hot water flowing out from the hot water boiler 10 is transported to users through pipelines.

The fossil fuel hot water boiler 10 can use various fuels to heat and supply hot water, including but not limited to coal, oil, natural gas, and the like. The system can simultaneously generate three energy sources: electricity, steam, and hot water.

The system uses solar molten salt heat storage as the main energy source and effectively couples fossil fuel hot water boilers with mechanical power to drive heat pumps. It uses solar molten salt heat storage to generate high-temperature and high-pressure steam, and then drives steam turbines to generate electricity. At the same time, steam turbines are used to extract steam. Drive the heat pump to effectively use low-grade energy; use the flue gas heat exchanger and heat pump to recover the heat of the flue gas and transfer it to the condensate water and heating return water to realize the full utilization of the heat of the flue gas. On the whole, the system has the advantages of multi-energy coupling and complementary energy saving and emission reduction, fully reflects the energy potential matching, realizes the cascade utilization of energy, and can simultaneously generate steam, electric energy, hot water and other energy sources.

A preferred implementation is as follows:

As shown in Figure 1, the low-temperature molten salt flows out of the low-temperature molten salt tank driven by the low-temperature molten salt pump 3, and the flow is adjusted through the valve 1 2, and then enters the trough-type solar heat collector 1 to absorb solar radiation heat and heat up to about 550°C. The high-temperature molten salt at about 550°C flows into the high-temperature molten salt tank 9, and a part is left in the high-temperature molten salt tank 9 for use at night or when the solar radiation is weak such as bad weather; Driven to flow out from the high-temperature molten salt tank, the high-temperature molten salt flow is adjusted through valve 28. The high-temperature molten salt flows through the superheater 6 and the steam generator 5 in sequence, and after exchanging heat with water, the temperature drops to about 290° C., and then flows into the low-temperature molten salt tank 4 .

The flue gas outlet of the fossil fuel hot water boiler 10 is connected to the flue gas inlet of the flue gas heat exchanger 11, and the high temperature flue gas at about 120°C exchanges heat with the condensed water, and the flue gas outlet of the flue gas heat exchanger 11 is connected to the heat pump evaporator The flue gas side inlet of the heat pump evaporator 20 is connected to each other, the heat pump circulating working medium reuses the heat of the low-grade flue gas, the temperature of the flue gas is reduced to about 40°C, and the flue gas side outlet of the heat pump evaporator 20 is connected to the chimney 24 to discharge the flue gas into the atmosphere. The heat pump cycle working medium absorbs heat and evaporates in the evaporator 20, and the generated low-temperature and low-pressure steam enters the compressor 22 to increase the temperature and pressure, and the high-temperature and high-pressure steam enters the heat pump condenser 25 to release heat and condense, and the low-temperature and high-pressure working medium passes through the throttle valve 21 When the pressure is reduced, the low-temperature and low-pressure working fluid enters the evaporator 20 again to absorb heat and evaporate to form a cycle. The compressor 22 in this process is driven by mechanical work, specifically: extract a certain amount of superheated steam from steam turbine one 15, adjust the amount of steam extraction through valve five 14, and the extracted superheated steam enters steam turbine two 23 to perform work, and the steam turbine The rotation of the blades drives the compressor to work.

The outlet side of the condenser 17 is connected to the condensed water inlet side of the flue gas heat exchanger 11, and the condensed water flows out of the condenser driven by the condensed water pump 12, and the flow rate is adjusted through the valve three 13, and in the flue gas heat exchanger 11 It exchanges heat with the flue gas, absorbs the waste heat of the flue gas, and realizes the preheating of the feed water. The outlet on the water side of the flue gas heat exchanger 11 is connected to the inlet on the water side of the steam generator, and the feed water exchanges heat with molten salt to generate superheated steam at 300°C-400°C, which enters the steam turbine-15 to do work, and drives the steam turbine generator set to generate electricity. Generate electricity. The exhaust steam mixed with the exhaust steam discharged from the steam turbine 2 23 enters the condenser 17 to condense and release heat.

The heat supply return water passes through the condenser 17 and the heat pump condenser 25 to absorb heat in turn, and finally returns to the fossil fuel hot water boiler 10 . The fossil fuel hot water boiler 10 can use but not limited to coal, oil, natural gas and other fuels, and the heat supply and return water is finally heated in the hot water boiler to generate hot water at 80°C-90°C.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form; all those skilled in the art can smoothly implement the present invention as shown in the attached drawings and the above descriptions. However, any equivalent change, modification and evolution made by those skilled in the art without departing from the scope of the technical solution of the present invention by utilizing the technical content disclosed above are all equivalent implementations of the present invention Example; at the same time, all changes, modifications and evolutions made to the above embodiments according to the substantive technology of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims (10)

1. A solar energy, hot water boiler and heat pump coupling energy supply system, is characterized in that, comprises solar thermal power generation system, heat pump circulation loop and hot water boiler (10), and described solar thermal power generation system comprises molten salt circulation loop and a circulating water circuit; the heat pump circulation loop includes a heat pump evaporator (20); The molten salt circulation loop comprises a solar heat collector (1), a high temperature molten salt tank (9), a superheater (6), a steam generator (5) and a low temperature molten salt tank (4); the low temperature molten salt tank The outlet of (4) is connected with the inlet of the solar heat collector (1), and the outlet of the solar heat collector (1) is connected with the inlet of the high-temperature molten salt tank (9) and superheater (6) molten salt side successively, The outlet of the molten salt side of the superheater (6) is sequentially connected with the molten salt side of the steam generator (5) and the inlet of the low temperature molten salt tank (4); The circulating water circuit includes a flue gas heat exchanger (11), a steam turbine (15), a drive generator (16) and a condenser (17), and the water side outlet of the condenser (17) is connected to the flue gas The water side inlet of the heat exchanger (11) is connected, and the water side outlet of the flue gas heat exchanger (11) is sequentially connected with the water side of the steam generator (5) and the water side inlet of the superheater (6), so The water side outlet of the superheater (6) is connected with the steam side inlet of the steam turbine one (15) and the condenser (17); the flue gas outlet of the hot water boiler (10) is connected with the flue gas heat exchanger (11 ) is connected to the flue gas side inlet of the heat pump evaporator (20). 2. A kind of solar energy, hot water boiler and heat pump coupled energy supply system according to claim 1, is characterized in that, described heat pump circulation circuit also comprises condenser (25) and compressor (22), and described condenser The steam side outlet of (25) is connected to the steam side inlet of the heat pump evaporator (20), and the steam side outlet of the heat pump evaporator (20) is connected with the steam side inlets of the compressor (22) and the condenser (25) in turn. 3. A kind of solar energy, hot water boiler and heat pump coupling energy supply system according to claim 2, is characterized in that, the flue gas side outlet of described heat pump evaporator (20) is connected with chimney (24), and described heat pump A throttling valve (21) is arranged between the evaporator (20) and the condenser (25). 4. A kind of solar energy, hot water boiler and heat pump coupling energy supply system according to claim 1, is characterized in that, between the outlet of described low-temperature molten salt tank (4) and the inlet of solar heat collecting device (1) A low-temperature molten salt pump (3) is provided, and a valve one (2) is provided at the outlet of the low-temperature molten salt pump (3); the solar heat collection device (1) is a trough structure. 5. A solar energy, hot water boiler and heat pump coupling energy supply system according to claim 1, characterized in that, between the outlet of the high temperature molten salt tank (9) and the inlet of the molten salt side of the superheater (6) A high-temperature molten salt pump (7) is arranged between them, and a valve two (8) is arranged between the inlet of the high-temperature molten salt pump (7) and the outlet of the high-temperature molten salt tank (9). 6. A solar energy, hot water boiler and heat pump coupled energy supply system according to claim 1, characterized in that a condensate pump is arranged between the condenser (17) and the flue gas heat exchanger (11) (12), the inlet of the condensate pump (12) is provided with a valve three (13). 7. A kind of solar energy, hot water boiler and heat pump coupled energy supply system according to claim 1, is characterized in that, described compressor (22) is connected with steam turbine two (23); Described steam turbine one (15 ) is connected to the exhaust steam outlet of steam turbine two (23); the steam inlet of said steam turbine two (23) is connected to the steam extraction outlet of steam turbine one (22) through an extraction pipeline, and steam turbine one ( 22) The outlet on the exhausted steam side is connected to the inlet on the steam side of the condenser (17). 8. A solar energy, hot water boiler and heat pump coupling energy supply system according to claim 7, characterized in that a valve five (14) is arranged between the steam turbine one (15) and the steam turbine two (23) ); One end of the steam turbine one (15) is provided with a generator (16). 9. A kind of solar energy, hot water boiler and heat pump coupling energy supply system according to claim 1, is characterized in that, between described condenser (17), hot water boiler (10) and condenser (25) They are connected in turn to form a hot water circulation pipeline. 10. A kind of solar energy, hot water boiler and heat pump coupled energy supply system according to claim 9, is characterized in that, the heat supply return water side inlet of described condenser (17) is provided with heat supply return water pump ( 18) and valve four (19).

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