A photovoltaic and solar thermal renewable energy multi-storage recycling system

Abstract

The present application discloses a photovoltaic and photothermal renewable energy multi-storage recycling system, including a solar water heater, a heating network, a power plant network, a sewage network, a sewage gas network, and an energy storage network. The solar water heater is connected to the heating network, the heating network and the sewage network are connected through a sewage heat pump, and the heating network and the sewage network are connected through a sewage heat pump. The present application can effectively utilize the heat energy of the sun, sewage, sewage and underground, effectively combine them, provide heating and cooling for the city, install them at multiple locations underground, control them separately, and provide heating and cooling for each building respectively, reduce the cost of pipeline layout during heating, reduce the use of heating boilers and power consumption during cooling in summer, integrate urban energy configuration, reduce the construction cost of multiple heating plants and the cost of tail gas treatment, and integrate them into a larger power plant, which is convenient for centralized consumption, centralized tail gas treatment, and reduces urban energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving buildings, and in particular to a photovoltaic and photothermal renewable energy multi-storage and recycling system. Background Art

[0002] About 46% of the world's energy is consumed in the final form of heat energy. Thermal energy storage is also an important branch of energy science and technology. In the process of energy conversion and utilization, there are often contradictions between supply and demand in time and space, such as the peak-to-valley difference of power load, the intermittent and fluctuating nature of renewable energy such as solar energy and wind energy, etc. Energy storage methods include mechanical energy, electromagnetic energy, chemical energy and thermal energy storage. Thermal energy storage also includes wet heat storage and latent heat (phase change heat) storage. Wet heat storage is carried out by utilizing the inherent heat melting of the material. Latent heat storage, or phase change energy storage, is carried out by utilizing the substances called phase change materials to absorb or release a large amount of latent heat when the physical state changes (solid-liquid, solid-solid or gas-liquid). Renewable energy thermal energy storage can be widely used in industry and civil use, and therefore occupies an extremely important position in the field of energy storage technology.

[0003] In the process of energy storage, the mutual exchange, application and storage of heat are extremely important. How to solve the contradiction of mismatch between energy supply and demand in time and space, and how to provide effective means of energy utilization, can only get the maximum utilization of energy and reduce energy consumption if the heat in each stage is effectively utilized. For this reason, we propose a multi-storage and recycling method and system for photovoltaic and solar thermal renewable energy to solve the above problems. Summary of the invention

[0004] The present application provides a photovoltaic and solar thermal renewable energy multi-storage recycling system, which solves the contradiction of the mismatch between traditional energy supply and demand in time and space, cannot provide effective means of energy utilization, cannot make good use of heat at each stage, and has low energy utilization.

[0005] The present application provides a photovoltaic and solar thermal renewable energy multi-storage recycling system, including a solar water heater, a heating network, a power plant network, a sewage network, a sewage gas network, and an energy storage network. The solar water heater is connected to the heating network, the heating network and the sewage network are connected via a sewage heat pump, the heating network and the sewage gas network are connected via a sewage heat pump, the heating network and the energy storage network are connected via a ground source heat pump, the sewage heat pump, the sewage gas heat pump, and the ground source heat pump are all connected to the power grid of the power plant network, the heating network and the waste heat pipes of the power plant network are connected via pipes, the sewage gas network is connected to the burner of the power plant network, and the solar water heater and the energy storage network are connected via a ground source heat pump. The power plant network and the energy storage network are connected through a heat exchanger, the sewage network and the sewage network are connected to the energy storage network through a heat exchanger, the energy storage network includes multiple outer tanks pre-buried in the ground at a depth of 1.3-22M and multiple vertical shafts arranged at a depth of 180-200M on the ground, and the interval between two adjacent vertical shafts is 4.5-12M. An inner tank is arranged in the outer tank, the interior of the outer tank is coated with thermal insulation paint, an interlayer is arranged in the inner tank, and the interlayer is filled with ppr nanocrystal blocks. A U-shaped tube is preset in the vertical shaft, and the bottom end of the U-shaped tube extends to the bottom of the vertical shaft, an interlayer is arranged in the U-shaped tube, and ppr nanocrystals are arranged in the interlayer of the U-shaped tube, and a heating coil is arranged in the inner tank.

[0006] Preferably, a ppr nanocrystal pre-buried layer is buried at the bottom of the vertical shaft, and the depth of the ppr nanocrystal pre-buried layer is 1-3M.

[0007] Preferably, the diameter of the outer tank is 50-250CM.

[0008] Preferably, the diameter of the U-shaped tube is 50-168MM.

[0009] Preferably, the wellhead diameter of the vertical shaft is 35-60CM.

[0010] Preferably, the temperature supply network includes a gas supply network and a heating network.

[0011] Preferably, the power plant pipeline network includes a waste heat pipeline and a burner gas supply pipeline.

[0012] Preferably, a negative pressure machine is installed at the sewage gas pipe network.

[0013] Preferably, a sewage pump is installed at the sewage pipe network.

[0014] It can be seen from the above technical scheme that the present application provides a photovoltaic and solar thermal renewable energy multi-storage recycling system. During installation, multiple inner tanks and outer tanks are assembled, and after the pipelines are installed and connected, they are pre-buried underground, and the original building construction is carried out. After the foundation construction is completed, a vertical shaft is drilled, and multiple U-shaped pipes are placed in the drilled holes. A ppr nanocrystal pre-buried layer is laid at the bottom of the vertical shaft, and the rest is filled with excavated soil and rocks. The connecting pipes of the inner tank and the U-shaped pipe are integrated, and each pipeline is separately set up and connected to a circulation pump to make the internal water circulate. The inner tank and the U-shaped pipe are connected to the solar water heater through a heat exchanger, and the solar water heater is connected to the heating water pipe. The solar water heater, the heat exchanger and the heating pipe are connected through a three-way valve. The water in the solar water heater flows into the heating water pipe or the heat exchanger, and then the inner tank and the U-shaped tube are connected through the heating pipe composed of the heat pump, the heating water pipe and the heating air pipe. A negative pressure adsorption pipe is installed in the city's sewer pipe to form a sewage pipe network, which is connected at the sewage pipe network through the heat pump, the heating water pipe and the heating air pipe. The sewage pipe is then connected to the combustion of the thermal power generating unit of the power grid, and is burned at the control end of the sewage collection pipe network through the heat pump, the heating water pipe and the heating air pipe. At the same time, the power plant waste heat pipe, the sewage pipe network and the sewage pipe network in the power plant pipe network are connected through the heat exchanger and the energy storage pipe network. When the temperature is high in summer, the underground temperature is 11-12℃, and the flowing sewage and the collected sewage are exchanged with heat through the heat exchanger and the energy storage pipe network, which heats the sewage. The temperature of the sewage is reduced, thereby reducing the temperature of the urban pipes. Due to the slight negative pressure in the urban sewage pipes, the pollution of the underground pipes to the environment is reduced. The heat collected by the solar energy is exchanged through the heat exchanger and the energy storage network, and the heat is stored in the inner tank and the surface layer. The cooling water of the thermal power station is exchanged through the heat exchanger and the energy storage network to reduce the heat discharged into the atmosphere and the water vapor loss caused by evaporation. The ground source heat pump absorbs the heat of the wind in the heating air duct into the energy storage network, and sends the cold air with lower temperature to the room for cooling, which not only reduces the heat emission in the air, but also reduces the power of the ground source heat pump because the water temperature in the energy storage network is lower than the room temperature in summer, achieving the purpose of energy saving. When the temperature is high, it exchanges heat with the water in the inner tank. When the temperature is low or the inner tank cannot absorb heat, heat is exchanged to the ground through the U-shaped tube. When the temperature is low in winter, during the day, the solar water heater is used to heat the heating network. When the temperature of the heating network does not meet the requirements, the sewage heat pump, sewage gas heat pump and ground source heat pump are turned on to heat the heating water pipe and heating air duct to the required temperature, absorbing the heat in the sewage and sewage. When the heat in the sewage and sewage is insufficient, the heat of the circulating water in the inner tank and the U-shaped tube is absorbed. When the heat of the circulating water in the inner tank is used more, the heat of the U-shaped tube is mainly absorbed. The water in the U-shaped tube is circulated once, flows to the ground, absorbs the heat from the ground and is sent back to the ground. The heat is exchanged to the heating network through the ground source heat pump for heating. The power of the ground source heat pump can be increased at night.The valley electricity is used to heat the inner tank through the heating coil, and the heat is stored, which is then used to heat the heating pipe network through the ground source heat pump during the day, thus improving energy efficiency.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the coordination of sewage pipe network, sewage gas pipe network, energy storage pipe network and power plant pipe network, the temperature of sewage and sewage gas is reduced, thereby reducing the urban heat island effect temperature, collecting and burning sewage gas, reducing the pollution of sewage gas to the atmosphere, and improving the city's environmental protection capacity;

[0017] 2. Through the cooperation of energy storage network and power plant network, the water in the inner tank is heated by using valley electricity in winter, and the heat is recovered and added to the heating network during the peak period of electricity consumption during the day, saving energy;

[0018] 3. Through the cooperation of energy storage pipe network, solar water heater and heating pipe network, energy is stored underground in summer, and heating is carried out through solar energy and energy storage pipe network in winter, reducing the high heating cost and large heat loss caused by the long traditional heating pipe line, reducing energy consumption in heating, integrating resources, providing heating and cooling for the city with a small amount of electricity, and reducing urban energy consumption;

[0019] 4. Through the setting of PPR nanocrystals, the thermal conductivity of the storage medium can be improved, the stored thermal energy can be increased, the heat transfer is fast, and the heat conversion is improved.

[0020] To sum up, the present application can effectively utilize the heat energy of the sun, sewage, sewage gas and underground, and effectively combine them to provide heating and cooling for the city. It can be installed at multiple locations underground and controlled separately to provide heating and cooling for each building, thereby reducing the cost of pipe layout during heating, reducing the use of heating boilers and electricity consumption during summer cooling, integrating urban energy configuration, reducing the construction cost and exhaust gas treatment cost of multiple heating plants, and integrating them into a larger power plant to facilitate centralized consumption, centralized exhaust gas treatment, and reduce urban energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a schematic diagram of the structure of a photovoltaic and solar thermal renewable energy multi-storage recycling system proposed by the present invention;

[0023] Figure 2This is a schematic diagram of the outer tank structure of a photovoltaic and solar thermal renewable energy multi-storage recycling system proposed by the present invention;

[0024] Figure 3 This is a schematic diagram of the U-shaped tube cross-section structure of a photovoltaic and solar thermal renewable energy multi-storage recycling system proposed by the present invention;

[0025] Figure 4 This is an enlarged view of the structure at point A of a photovoltaic and solar thermal renewable energy multi-storage recycling system proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the energy storage network structure of a photovoltaic and solar thermal renewable energy multi-storage recycling system proposed by the present invention.

[0027] In the figure: 1 outer tank, 2 U-shaped pipe, 3 vertical shaft, 4ppr nanocrystal pre-buried layer, 5ppr nanocrystal block, 6 inner tank, 7 insulation paint, 8 heating coil. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] See also Figure 1-5, a photovoltaic and solar thermal renewable energy multi-storage recycling system, including solar water heaters, heating pipe networks, power plant pipe networks, sewage pipe networks, sewage gas pipe networks, and energy storage pipe networks. The solar water heater absorbs energy from the sun in summer, stores the energy in the water in the inner tank 6 through the inner tank 6, and sends it underground through the U-tube 2 and the vertical shaft to reduce the temperature in the city and supplement the ground heat consumed in winter. When heating, the heating pipe network is first cooled by the ground source heat pump and then heated. The heating pipe network includes a gas supply pipe network and a heating pipe network. The heating pipe network adjusts the temperature through water and air. The power plant pipe network includes a waste heat pipeline and a burner gas supply pipeline. The power plant pipe network is a traditional thermal power generation system that can use a burner to treat sewage. The sewage pipe network is an urban sewage drainage pipeline. The sewage gas pipe network is another set of pipes arranged in the urban sewage pipe. A negative pressure machine is installed at the sewage gas pipe network. The pipeline The internal pressure is negative, which absorbs the polluted air in the sewage pipe and reduces the pollution of the polluted air to the urban air. The solar water heater is connected to the heating pipe network. In winter, the heating pipe network is heated by solar energy. The heating pipe network and the sewage pipe network are connected by a sewage heat pump. In winter, the average temperature of sewage and polluted air is 12°C, and the heat pump can be used to absorb this part of energy. A sewage pump is installed at the sewage pipe network to improve the fluidity of sewage. The heating pipe network and the sewage pipe network are connected by a sewage heat pump to absorb the heat of the polluted air in winter. The heating pipe network and the energy storage pipe network are connected by a ground source heat pump. Pure water flows in the energy storage pipe network to avoid pipeline congestion and improve the stability of operation. In winter, the ground source heat pump absorbs the heat of the energy storage pipe network to increase the heat of the heating pipe network. In summer, it absorbs the heat of the heating pipe network and provides it to the energy storage pipe network to achieve temperature control of the city at different temperatures.

[0030] The sewage heat pump, sewage gas heat pump and ground source heat pump are all connected to the power grid of the power plant network. The heat pump consumes little during heat conversion and controls the conversion temperature to a high level. The waste heat pipes of the heating network and the power plant network are connected through pipes. In winter, the excess heat is supplied to nearby houses during the low-power period at night. The sewage gas network is connected to the burner of the power plant network, and the sewage is treated by the burner of the power plant to beautify the urban environment. The solar water heater and the energy storage network are connected through a heat exchanger. In summer, the heat is stored in the energy storage network. The plant pipe network and the energy storage pipe network are connected through a heat exchanger. The cooling water of the thermal power station exchanges heat with the energy storage pipe network through the heat exchanger, reducing the heat emitted to the atmosphere, while reducing the water vapor loss caused by evaporation, and reducing the water cost of thermal power generation. The sewage pipe network and the sewage pipe network are connected to the energy storage pipe network through a heat exchanger. In summer, due to the high temperature inside the city, the temperature of sewage and gas rises. The average temperature of sewage is 25°C. Through the heat exchanger, the temperature of sewage is reduced to the underground temperature, reducing the impact of sewage on the environment and the growth of bacteria;

[0031] The energy storage network includes multiple outer tanks 1 pre-buried in the ground at a depth of 1.3-22M and multiple shafts 3 set at a depth of 180-200M. The diameter of the outer tank 1 is 50-250CM, which is low in cost and easy to transport. The support is simple when installed underground and does not affect the soil layer. The interval between two adjacent shafts 3 is 4.5-12M, which can effectively store heat in summer and absorb heat in winter. The wellhead diameter is 35-60CM, which is easy to construct and has low construction cost. An inner tank 6 is arranged inside the outer tank 1. The interior of the outer tank 1 is coated with thermal insulation paint 7. The outer tank 1 and the thermal insulation paint 7 cooperate to insulate the inner tank 6. Buried in the ground, it can greatly improve the insulation effect. An interlayer is provided in the inner tank 6, and the interlayer is filled with ppr nanocrystal blocks 5, which has good energy storage and fast heat transfer. A U-shaped tube 2 is preset in the shaft 3, and the diameter of the U-shaped tube 2 is 50-168MM. The water flows smoothly, and heat exchange with the ground is achieved through the U-shaped tube 2. The bottom end of the U-shaped tube 2 extends to the bottom of the shaft 3. An interlayer is provided in the U-shaped tube 2, and ppr nanocrystals are provided in the interlayer of the U-shaped tube 2, which can store a large amount of heat energy and has a good heat conduction block, thereby improving the heat exchange efficiency. A heating coil 8 is provided in the inner tank 6. In winter, when the temperature of the inner tank 6 is low, At night, the off-peak electricity is used to heat the water in the inner tank 6, store the excess electricity, and use it reasonably. The heat of sewage and sewage gas is converted into clean hot water source by heat exchangers and plate exchangers and returned to the tank. In the shallow geothermal well, the underground soil layer is a huge natural heat source with great thermal inertia. The temperature fluctuation throughout the year is very small. Generally speaking, the temperature below 50m below the surface can be maintained at the annual average temperature of the region all year round. It is an ideal natural cold and heat source. The light heat is used to charge the hot tank and provide heat at the same time. When there is no light, the water in the inner tank 6 is used for heating. The off-peak electricity duration is 10 hours (22:00-08:00), and the heating is designed The indoor temperature is 22-25℃. During the off-peak period, three kinds of thermal energy, valley electricity, sewage and geothermal energy, are used for heating and cooling at the same time. In other time periods, heat is released for heating and hot water. While providing heating efficiently and stably, it can effectively alleviate the adverse effects of peak electricity consumption periods on the power grid system, and fully utilize the energy of the power grid system during the off-peak period, reducing unnecessary energy waste and keeping the unit in the best operating state. The layout and installation of the valley electricity phase tank energy storage and heat storage centralized heating project are perfectly combined with the existing buildings, should not affect the overall appearance of the original building, can reasonably and effectively utilize the underground space, and will not affect the ground attachments.

[0032] The temperature of urban groundwater is relatively constant. The average water temperature in summer is 25°C. The underground temperature spreads slowly. The water temperature is stable at 25°C under long-term heating. At this time, the heat pump COP value is about 6.1, the heat pump cooling capacity is 3600kW, and the hourly water consumption is about 720.6 cubic meters. In summer cooling, 2-6 heat pumps are generally matched, and the total hourly water consumption is 4323.6 cubic meters.

[0033] The average temperature of sewage in winter is calculated as 12°C, and the heating temperature in winter is 60°C. At this time, the COP value of the sewage heat pump is about 5.1, the heating capacity of the heat pump is 4400kW, and the hourly sewage consumption is about 723.9 cubic meters. Two heat pumps can be turned on for heating. The total hourly sewage consumption is about 1447.8 cubic meters. When the sewage is insufficient, water is supplied through the energy storage network;

[0034] In summer, the maximum hourly water volume is 4,323.6 cubic meters for cooling; in winter, the maximum hourly sewage volume is 1,447.8 cubic meters for heating. The above heating area is about 180,000 square meters.

[0035] When treating sewage in summer, underground water at 11-12℃ can be heated to 21℃ through sewage heat exchange, and then heated to 60-100℃ by solar energy. The hot water is sent to the inner tank 6 or shallow underground for heat exchange. The minimum power is 150GJ, which can provide heating for 5,000 square meters in winter. The maximum energy storage power is 150,000 GJ, which can provide centralized heating for 5 million square meters in winter.

[0036] In the present invention, a ppr nanocrystal pre-buried layer 4 is buried at the bottom of the shaft 3 to improve the heat transfer efficiency and energy storage at the bottom. The depth of the ppr nanocrystal pre-buried layer 4 is 1-3M, which reduces the installation cost.

[0037] It can be seen from the above technical scheme that when in use, multiple inner tanks 6 and outer tanks 1 are assembled, and after the pipelines are installed and connected, they are pre-buried underground and the original building construction is carried out. After the foundation construction is completed, a vertical shaft 3 is drilled, and multiple U-shaped tubes 2 are placed in the drilled hole. A ppr nanocrystalline pre-buried layer 4 is laid at the bottom of the vertical shaft 3, and the rest is filled with excavated soil and rocks. The connecting pipes of the inner tank 6 and the U-shaped tube 2 are integrated, and each pipeline is separately set and connected to a circulation pump to make the internal water circulate. The inner tank 6 and the U-shaped tube 2 are connected to the solar water heater through a heat exchanger, and the solar water heater is connected to a heating water pipe. The solar water heater, the heat exchanger and the heating pipe are connected through a three-way valve, and the water in the solar water heater flows into the heating water pipe or the heat exchanger. The inner tank 6 and the U-shaped tube 2 are connected through a heating pipeline composed of a heat pump, a heating water pipe and a heating air pipe. A negative pressure adsorption pipeline is installed in the city's sewer pipe to form a sewage pipe network. The sewage pipe network is connected through a heat pump, a heating water pipe and a heating air pipe. The sewage pipe is then connected to the combustion of the thermal power generating unit of the power grid. At the control end of the sewage collection pipe network, it is connected through a heat pump, a heating water pipe and a heating air pipe. At the same time, the power plant waste heat pipe, the sewage pipe network and the sewage pipe network in the power plant pipe network are connected through a heat exchanger and an energy storage pipe network. When the temperature is high in summer, the underground temperature is 11-12°C. The flowing sewage and the collected sewage are exchanged with heat through the heat exchanger and the energy storage pipe network to cool the sewage and the sewage, thereby cooling the city pipes. The city sewage pipe is in a slightly negative pressure state, reducing the pollution of underground pipes to the environment. The heat collected by solar energy is exchanged through the heat exchanger and the energy storage network, and the heat is stored in the inner tank and the surface layer. The cooling water of the thermal power station is exchanged through the heat exchanger and the energy storage network, reducing the heat discharged to the atmosphere and reducing the water vapor loss caused by evaporation. The ground source heat pump absorbs the heat of the wind in the heating air duct into the energy storage network, and sends the lower temperature cold air to the room for cooling, which not only reduces the heat emission to the air, but also reduces the power of the ground source heat pump because the water temperature in the energy storage network is lower than the room temperature in summer, achieving the purpose of energy saving. When the temperature is high, it exchanges heat with the water in the inner tank 6. When the temperature is low or the inner tank 6 cannot absorb heat, it is discharged to the ground through the U-shaped pipe. Heat exchange, when the temperature is low in winter, during the day, solar water heaters are used to heat the heating network. When the temperature of the heating network does not meet the requirements, the sewage heat pump, sewage gas heat pump and ground source heat pump are turned on to heat the heating water pipe and heating air duct to the required temperature, and absorb the heat in the sewage and sewage. When the heat in the sewage and sewage is insufficient, the heat of the circulating water in the inner tank 6 and the U-tube 2 is absorbed. When the heat of the circulating water in the inner tank 6 is used more, the heat of the U-tube 2 is mainly absorbed. The water in the U-tube 2 is circulated once, flows to the ground, absorbs the heat from the ground, and is sent back to the ground. The ground source heat pump exchanges the heat to the heating network for heating. At night, the power of the ground source heat pump can be increased, and the valley electricity is used to heat the inner tank through the heating coil 8 to store heat.During the day, the ground source heat pump is used to heat the heating pipe network to improve energy efficiency.

[0038] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope of the present application is indicated by the claims.

[0039] It should be understood that the present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A photovoltaic and solar thermal renewable energy multi-storage recycling system, including solar water heaters, heating pipe networks, power plant pipe networks, sewage pipe networks, sewage gas pipe networks, and energy storage pipe networks, characterized in that: The solar water heater is connected to the heating network, the heating network and the sewage network are connected via a sewage heat pump, the heating network and the sewage network are connected via a sewage heat pump, the heating network and the energy storage network are connected via a ground source heat pump, the sewage heat pump, the sewage heat pump and the ground source heat pump are all connected to the power grid of the power plant network, the heating network and the waste heat pipes of the power plant network are connected via pipes, the sewage network is connected to the burner of the power plant network, the solar water heater and the energy storage network are connected via a heat exchanger, the power plant network and the energy storage network are connected via a heat exchanger, the sewage network and the sewage network are both connected to the energy storage network via a heat exchanger The energy storage network comprises a plurality of outer tanks (1) pre-buried in the ground at a depth of 1.3-22 m and a plurality of vertical shafts (3) arranged at a depth of 180-200 m on the ground, the interval between two adjacent vertical shafts (3) being 4.5-12 m, an inner tank (6) being arranged in the outer tank (1), the interior of the outer tank (1) being coated with a thermal insulation paint (7), an interlayer being arranged in the inner tank (6), the interlayer being filled with ppr nanocrystal blocks (5), a U-shaped tube (2) being preset in the vertical shaft (3), the bottom end of the U-shaped tube (2) extending to the bottom of the vertical shaft (3), an interlayer being arranged in the U-shaped tube (2), the interlayer of the U-shaped tube (2) being provided with ppr nanocrystals, and a heating coil (8) being arranged in the inner tank (6); A ppr nanocrystal pre-buried layer (4) is buried at the bottom of the vertical shaft (3), the depth of the ppr nanocrystal pre-buried layer (4) is 1-3 meters, and a negative pressure machine is installed at the sewage pipe network.

2. A photovoltaic and solar thermal renewable energy multi-storage recycling system according to claim 1, characterized in that: The diameter of the outer tank (1) is 50-250 cm.

3. The photovoltaic and solar thermal renewable energy multi-storage recycling system according to claim 1 is characterized in that: The diameter of the U-shaped tube (2) is 50-168MM.

4. The photovoltaic and solar thermal renewable energy multi-storage recycling system according to claim 1 is characterized in that: The wellhead diameter of the vertical well (3) is 35-60CM.

5. The photovoltaic and solar thermal renewable energy multi-storage recycling system according to claim 1 is characterized in that: The temperature supply network includes a gas supply network and a heating network.

6. The photovoltaic and solar thermal renewable energy multi-storage recycling system according to claim 1 is characterized in that: The power plant pipeline network includes a waste heat pipeline and a burner gas supply pipeline.

7. The photovoltaic and solar thermal renewable energy multi-storage recycling system according to claim 1 is characterized in that: A sewage pump is installed at the sewage pipe network.

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