CN116006425A - Photovoltaic-geothermal-energy storage energy joint development system and method thereof - Google Patents
Photovoltaic-geothermal-energy storage energy joint development system and method thereof Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The utility model provides a photovoltaic-geothermal-energy storage energy joint development system and a method thereof, wherein the system comprises a photovoltaic power station, an energy storage power station and a geothermal station, the geothermal station comprises a geothermal well, a recharging well, a conveying pipeline, a heat exchanger, a heat pump unit, a water supplementing device, a gradient neutralization device, a plurality of circulating pumps, a valve, a high-temperature pool, a medium-temperature pool and a low-temperature pool, the geothermal well is a medium-deep geothermal well, the geothermal station also comprises a shallow geothermal buried pipe, the output side of the low-temperature pool is provided with a backwater treatment center, the output side of the backwater treatment center is provided with a concentrate pipeline and a filtrate pipeline, the filtrate pipeline is connected with the recharging power unit, and the energy storage power station and the photovoltaic power station are electrically connected with the geothermal station; the energy storage power station and the photovoltaic power station provide power for the geothermal station, and heat from different gradients is neutralized by the gradient neutralization device, so that the comprehensive utilization rate of energy is improved, the heat supply and water supply stability is improved, the environmental protection benefit is improved, and the energy storage power station and the photovoltaic power station are suitable for large-scale popularization.
Description
Technical Field
The utility model belongs to the technical field of heating, and relates to a photovoltaic-geothermal-energy storage energy joint development system and a method thereof.
Background
Photovoltaic is a short term of solar photovoltaic power generation system, is a novel power generation system for directly converting solar radiation energy into electric energy by utilizing the photovoltaic effect of solar cell semiconductor materials, and has two modes of independent operation and grid-connected operation. The energy storage power station uses the electric power of the power grid in the low load, pumps water from the lower reservoir to the upper reservoir for energy storage, and when the power grid is in peak load, the water is discharged to return to the hydropower station for power generation of the lower reservoir, which is also called energy storage hydropower station, so that the peak regulation problem of the power grid with thermal power as the main power grid can be solved, and the economic benefit of power consumption can be increased. Geothermal energy and solar energy are renewable clean energy sources. Geothermal energy can be classified into three types of shallow geothermal energy, medium-deep geothermal energy and deep geothermal energy. The utilization of deep geothermal energy mainly comprises the generation of dry hot rock; the middle-deep geothermal energy mainly comprises water heat type and rock-soil heat; the shallow geothermal energy mainly utilizes the geothermal energy of the soil, but the average temperature of the soil is relatively low, and the shallow geothermal energy has the characteristic of easily unbalanced cold and hot loads. Because the exploration technology and the drilling construction cost are both developed towards the beneficial direction, the utilization and development of the geothermal heat in the middle and deep layers are also emphasized, compared with the conventional shallow geothermal heating system, the medium and deep geothermal heating technology is more energy-saving, and the deeper the well is, the higher the heat source temperature is.
In the prior art, in the medium-deep geothermal development and heating water supply project, recharging is generally not adopted, but after the influence of excessive geothermal water development on geology and the influence of geothermal tail water on environment are recognized, recharging technology is adopted to reduce the influence of geothermal development on geology and environment, but a considerable part of potential energy in the recharging process is not fully utilized, and the electric energy demand of the medium-deep geothermal development and heating water supply project is relatively high, so that most of the geothermal development and the heating water supply project depend on thermal power generation and photovoltaic power generation.
The prior patent CN202220238612.4 discloses a photovoltaic-pumped storage-geothermal combined development and utilization system for abandoned coal mines, wherein a coal mine underground space reservoir is communicated with heat exchange equipment through a pumped heat extraction well, cooled geothermal water flows out of the heat exchange equipment and enters a ground subsidence area reservoir through a geothermal water tail water delivery pipe, the ground subsidence area reservoir is communicated with the coal mine underground space reservoir through a recharging power generation channel, a water pump is arranged on the pumped heat extraction well, and a hydroelectric generating set is arranged on the recharging power generation channel; a circulating water pipeline is arranged between the heat source utilization end and the heat exchange equipment; a solar panel of a photovoltaic power station is erected above the reservoir in the ground subsidence area; the photovoltaic power station is connected with a water suction pump through a power transmission line; the underground space of the coal mine is abandoned coal mine goaf or well and roadway engineering. The utility model realizes the combined development and comprehensive utilization of solar energy, geothermal energy, underground space energy storage and other multi-energy complementary modes, but in the geothermal development process, the influence of the geothermal gradient on the temperature of the extracted hot water is not ignored, and the heat utilization quality is directly influenced, including the temperature level, the temperature stability and the like; secondly, the water quality of geothermal tail water also can cause great influence on the recharging generator set in the long-term recharging process, especially the blockage problem, and the energy storage and power generation efficiency is influenced.
Disclosure of Invention
Aiming at the technical problems in geothermal development and utilization and electric energy supply, the utility model provides a photovoltaic-geothermal-energy storage energy combined development system and a photovoltaic-geothermal-energy storage energy combined development method, which are reasonable in design, high in comprehensive energy utilization rate, beneficial to improving heat and water supply stability and beneficial to improving environmental protection benefits.
In order to achieve the above purpose, the technical scheme adopted by the utility model is that the photovoltaic-geothermal-energy-storage energy joint development system and the method thereof comprise a photovoltaic power station, an energy storage power station and a geothermal station, wherein the energy storage power station comprises a recharging generating set, the geothermal station comprises a geothermal well, a recharging well and a conveying pipeline for connecting the geothermal well and the recharging well, the conveying pipeline is provided with a heat exchanger, a heat pump set, a water supplementing device, a plurality of circulating pumps and valves, the heat exchanger is provided with a heating pipeline and a water supply pipeline, the heating pipeline is used for being connected with a heating end at a user side, a water draining end at the user side is connected with the heat pump set, the geothermal well is a middle-deep geothermal well, the geothermal station also comprises a shallow geothermal buried pipe, and the output sides of the shallow geothermal buried pipe and the geothermal well are provided with gradient neutralization devices, the conveying pipeline is also provided with a high-temperature pool, a medium-temperature pool and a low-temperature pool, the input side and the output side of the high-temperature pool are respectively connected with a gradient neutralization device and a heat exchanger, the input side of the medium-temperature pool is connected with a heat pump unit, the output side of the medium-temperature pool is provided with a business user, the input side of the low-temperature pool is connected with the heat pump unit and the output side of the user side, the output side of the low-temperature pool is provided with a backwater treatment center, the output side of the backwater treatment center is provided with a concentrate pipeline and a filtrate pipeline, the concentrate pipeline and the filtrate pipeline are arranged in a recharging well, the filtrate pipeline is connected with a recharging generator set, an energy storage power station and a photovoltaic power station are electrically connected with a geothermal station, the electricity utilization end of the energy storage power station is connected with a circulating pump and a valve, the electricity utilization end of the photovoltaic power station is provided with an electric boiler, the electric boiler is connected with a steam pipeline arranged inside the heat exchanger.
Preferably, the gradient neutralization device comprises a head box, a middle box and a tail box which are sequentially connected end to end, a pressure release valve is arranged on the head box, connecting flanges are arranged on the head box and the tail box, the connecting flanges are used for connecting a middle deep hot water pipe, a plurality of neutralization pipes which are uniformly arranged and have oval cross sections are arranged in the middle box, the neutralization pipes comprise middle shaft holes, a pair of side shaft holes are formed in two sides of the middle shaft holes, end covers which are connected with the middle box are arranged at two ends of the middle box, a plurality of water pipe connecting ports are arranged on the end covers, a shallow hot water pipe is arranged at the water pipe connecting ports, a plurality of assembly holes which are in one-to-one correspondence with the middle shaft holes are formed in the side surfaces of the end covers, and three-joint pipes are arranged in the assembly holes, each three-joint pipe comprises a plug-in part which is plugged with the middle shaft holes, a clamping part which is clamped with the end of the end cover and the middle box, and a buffer part which is positioned at the other side of the end cover, and one end far away from the end cover is provided with a plurality of through holes are formed in the side surfaces.
Preferably, the diameter of the insertion portion is smaller than the diameter of the clamping portion, and the diameter of the clamping portion is larger than the diameter of the buffer portion.
Preferably, the shallow hot water pipe comprises a main pipe, a plurality of branch pipes are arranged on the main pipe, regulating valves are arranged on the branch pipes, flat pipes are arranged at the end parts of the branch pipes, and the end parts of the flat pipes are connected with the water pipe connectors.
Preferably, the water supplementing device is connected with the high-temperature tank.
A photovoltaic-geothermal-energy-storage energy joint development method is characterized in that a geothermal station adopts a middle deep geothermal well and a shallow geothermal buried pipe to jointly perform heat extraction, hot water in the middle deep geothermal well and hot water in the shallow geothermal buried pipe are subjected to heat neutralization in a gradient neutralization device and are subjected to quality improvement and pressure stabilization, all hot water subjected to quality improvement and pressure stabilization enters a high-temperature pond, geothermal water in the high-temperature pond enters a heat exchanger for heat exchange at the temperature of 60-75 ℃, meanwhile, an electric boiler heats the heat exchanger, hot water obtained by the heat exchanger is supplied to a user through a water supply pipeline, geothermal water is cooled to 35-45 ℃ and then enters a user through a heating pipeline, backwater cooled to 25-30 ℃ enters a heat pump unit for heating to 30-40 ℃ and then enters a middle-temperature pond, hot water in the middle-temperature pond is used by commercial users, backwater water of the user and drainage of the heat pump unit enter a low-temperature pond for cooling to 20-25 ℃, the heat tail water enters a backwater treatment system for treatment, concentrated backwater water generated by the heat tail water after treatment enters a heat pump unit for direct recharging to a power generation station through a filter, and a power generation station for filtering and recycling electric energy storage through a filter station, and a power generation station for recycling electric energy storage station through a filter.
Compared with the prior art, the utility model has the advantages and positive effects that:
1. according to the photovoltaic-geothermal-energy storage combined development system and the method thereof, the geothermal station adopts the combination of the middle-deep geothermal well and the shallow geothermal buried pipe to take heat, and the water in the shallow geothermal buried pipe plays the role of a water supplementing device, so that the water utilization efficiency and the sufficiency of the recharging water quantity are guaranteed; the hot water in the central deep geothermal well and the hot water in the shallow geothermal buried pipe are neutralized by the gradient neutralization device, the hot water is upgraded and stabilized, the upgraded and stabilized hot water is reasonably utilized in steps, the concentrated water generated after the geothermal tail water is treated is directly recharged to the ground, the filtered water generated after the geothermal tail water is treated flows through a recharging generator set from a filtering pipeline to generate electricity, the electric energy generated by the recharging generator set is transmitted to a circulating pump and a valve of a geothermal station for utilization by an energy storage power station, and meanwhile, the electric energy generated by the photovoltaic power station is transmitted to an electric boiler of the geothermal station for utilization.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a photovoltaic-geothermal-energy storage energy co-generation system provided in an embodiment;
FIG. 2 is an isometric view of a gradient neutralization apparatus provided by an embodiment;
FIG. 3 is a front view of a gradient neutralization apparatus provided by an embodiment;
FIG. 4 is an isometric view of an end cap, shallow hot water pipe and three-section pipe provided by an embodiment;
FIG. 5 is a cross-sectional view of an end cap, shallow hot water pipe and three-section pipe provided by an embodiment;
FIG. 6 is a cross-sectional view of the end cap, shallow hot water pipe and three-section pipe provided in the embodiment in another direction;
FIG. 7 is a cross-sectional view of a geothermal well, a concentrate line, and a filtrate line provided in an embodiment;
in the above figures:
1. a geothermal well; 2. recharging the well; 3. a transfer line; 31. a heating pipeline; 32. a water supply line; 33. a concentrate line; 34. a filtrate pipe; 4. a heat exchanger; 5. shallow geothermal buried pipe; 6. a water supplementing device; 7. a circulation pump; 8. a valve;
9. gradient neutralization device; 91. a head box; 92. a middle box; 93. a tail box; 94. a connecting flange; 95. a middle-deep layer hot water pipe; 96. a neutralization tube; 961. a middle shaft hole; 962. a side shaft hole; 97. an end cap; 971. a water pipe connection port; 98. a shallow hot water pipe; 981. a main pipe; 982. a branch pipe; 983. a flat tube; 99. three-section pipe; 991. a plug-in part; 992. a clamping part; 993. a buffer section; 994. a through hole;
10. a high temperature pool; 11. a medium temperature pool; 12. a low temperature pool; 13. a heat pump unit; 14. an electric heating boiler; 15. a photovoltaic power plant; 16. an energy storage power station; 161. recharging the generator set; 17. and (5) backwater treatment center.
Detailed Description
In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are merely used herein to denote a correspondence with the upper, lower, left, and right directions of the drawing figures, and are not limiting on the structure.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.
1-7, the photovoltaic-geothermal-energy storage energy combined development system provided by the utility model comprises a photovoltaic power station 15, an energy storage power station 16 and a geothermal station, wherein the energy storage power station 16 comprises a recharging power unit 161, the geothermal station comprises a geothermal well 1, a recharging well 2 and a conveying pipeline 3 for connecting the geothermal well 1 and the recharging well 2, a heat exchanger 4, a heat pump unit 13, a water supplementing device 6, a plurality of circulating pumps 7 and valves 8 are arranged on the conveying pipeline 3, a heating pipeline 31 and a water supply pipeline 32 are arranged on the heat exchanger 4, the heating pipeline 31 is used for being connected with a heating end on a user side, and a water draining end on the user side is connected with the heat pump unit 13. The photovoltaic power station 15 generates power by using solar energy, and a main part of the power generation can be used by users and business users, while the energy storage power station 16 does not adopt water-by-river construction, but uses a recharging water column of the geothermal power station to store energy for power generation.
In order to improve the energy utilization rate of photovoltaic-geothermal-energy storage, the geothermal well 1 is a middle-deep geothermal well 1, the geothermal station further comprises a shallow geothermal buried pipe 5, the shallow geothermal buried pipe 5 and the output side of the geothermal well 1 are provided with a gradient neutralization device 9, a high-temperature tank 10, a middle-temperature tank 11 and a low-temperature tank 12 are further arranged on a conveying pipeline 3, the input side and the output side of the high-temperature tank 10 are respectively connected with the gradient neutralization device 9 and a heat exchanger 4, the input side of the middle-temperature tank 11 is connected with a heat pump unit 13, the output side of the middle-temperature tank 11 is provided with a commercial user, the input side of the low-temperature tank 12 is connected with the heat pump unit 13 and the output side of the user side, the output side of the low-temperature tank 12 is provided with a backwater treatment center, the output side of the backwater treatment center is provided with a concentrate pipeline 33 and a filtrate pipeline 34, the concentrate pipeline 33 and the filtrate pipeline 34 are arranged inside a recharging well 2, the filtrate pipeline 34 is connected with a recharging generator set, the energy storage station 16 and the photovoltaic power station 15 are electrically connected with the geothermal station, the recharging station is electrically connected with a valve of the recharging generator set 161 and the boiler 14, and the boiler 14 is arranged inside the boiler 14, and the heat exchanger is connected with the boiler 14.
Specifically, the utility model provides a combined development method of energy of photovoltaic-geothermal energy-energy storage, a geothermal station adopts a middle-deep geothermal well 1 and a shallow geothermal buried pipe 5 to heat in a combined way, hot water of the middle-deep geothermal well 1 is groundwater, hot water in the shallow geothermal buried pipe 5 is external water supply, the hot water in the middle-deep geothermal well 1 and the hot water in the shallow geothermal buried pipe 5 are subjected to heat neutralization in a gradient neutralization device 9 and quality and pressure improvement and stabilization, the quality and pressure improvement and the pressure stabilization hot water are all fed into a high-temperature pool 10, geothermal water in the high-temperature pool 10 with the temperature of 60-75 ℃ enters a heat exchanger 4 to heat the heat, meanwhile, an electric boiler 14 heats the heat exchanger 4, hot water with heat obtained in the heat exchanger 4 is supplied to a user by a water supply pipeline 32, the geothermal water is cooled to 35-45 ℃ and then enters the user by a heating pipeline 31 to heat, heating backwater cooled to 25-30 ℃ enters a heat pump unit 13 to be heated to 30-40 ℃ and then enters a middle temperature pond 11, hot water in the middle temperature pond 11 enters industrial and commercial users to be utilized, such as bath heating and the like, backwater of the users and drainage water of the heat pump unit 13 enter a low temperature pond 12 to be cooled to 20-25 ℃ or lower, cooling tail water enters a backwater treatment system to filter the cooling tail water and remove metal rust impurities carried in a conveying pipeline 3, the residual concentrated water after the geothermal tail water is treated is directly recharged to the ground, the concentrated water contains mineral components and other raw materials in the hot water in situ, filtered water generated after the treatment flows through a recharging generator set 161 from a filtering pipeline to generate electricity, the filtered water can reduce corrosion to the recharging generator set 161, the blocking probability of the liquid flow path in the recharging generator set can be reduced; the recharging generator set is accumulated in the energy storage power station 16 through the electricity generated by the hydraulic potential energy, the energy storage power station 16 distributes and transmits the electricity generated by the recharging generator set to the circulating pump 7 and the valve 8 of the geothermal station for use, and meanwhile, the electricity generated by the photovoltaic power station 15 is transmitted to the electric boiler 14 of the geothermal station for use. The electricity consumption of the circulating pump and the valve is smaller than that of the electric boiler 14, so that the electricity of the energy storage power station 16 is sufficient for the circulating pump and the valve to be utilized, and the electricity generated by the photovoltaic power station 15 is supplied to the boiler 14 to generate steam to heat the hot water in the heat exchanger 4, so that the quality of hot water supply is greatly improved, and the requirement of a water end on the hot water is further met.
Further, the hot water in the shallow geothermal buried pipe 5 serves as a part of the water supplementing device 6, namely, the high-temperature pool 10 is supplemented with water, so that the loss of the geothermal water in the conveying pipeline 3 can be compensated, and the difference between the before and after the utilization of the geothermal water is reduced.
In order to improve the quality of heat exchange medium in the heat exchanger 4, the gradient neutralization device 9 provided by the utility model comprises a head box 91, a middle box 92 and a tail box 93 which are sequentially connected end to end, wherein a pressure release valve is arranged on the head box 91, connecting flanges 94 are arranged on the head box 91 and the tail box 93, the connecting flanges 94 are used for connecting a middle deep hot water pipe 95, a plurality of evenly arranged neutralization pipes 96 with oval cross sections are arranged in the middle box 92, the neutralization pipes 96 comprise middle shaft holes 961, two sides of the middle shaft holes 961 are provided with a pair of side shaft holes 962, two ends of the middle box 92 are provided with end covers 97 which are connected with the middle shaft holes, a plurality of water connection ports 971 are arranged on the end covers 97, the water connection ports 971 are provided with shallow hot water pipes 98, a plurality of assembly holes which are in one-to-one correspondence with the middle shaft holes 961 are arranged on the side surfaces of the end covers 97, three-section pipes 99 are arranged in the assembly holes, each three-section pipe 99 comprises a plug-in part 991 which is plugged with the middle shaft holes 961, a clamping part 992 which is clamped with the end parts of the end covers 97 and the middle box 92 and a buffer part 993 which is positioned on the other side of the end parts of the end covers 97, and the buffer part 993 is far away from one end of the end covers 994, and one end covers 994 are arranged. The plugging portion 991 is used for improving the matching tightness of the three-section pipe 99 and the middle pipe 96, and the clamping portion 992 enables the inner end surface of the end cover 97 and the end portion of the middle pipe 96 to form a certain distance, so that a space capable of containing geothermal water is reserved between the end cover 97 and the middle box 92.
Specifically, the gradient neutralization device 9 works in that geothermal water is pumped into the deep and middle hot water pipe 95 by a pump and enters the head box 91, the deep and middle hot water pipe 95 is collected in the head box 91 and filtered by the buffer portion 993 of the three-section pipe 99 to remove excessive impurities, the buffer portion 993 has the function of filtering and pre-stores the geothermal water with temperature steps, and air and bubbles carried by the geothermal water have rising trend, so that the air can be collected at the inner top of the head box 91 and finally discharged out of the ground by a pressure relief valve, and the geothermal water entering the shaft hole 961 in the neutralization pipe 96 is also more abundant; further, the shallow geothermal water enters the hollow part formed by the end cover 97 and the end part of the middle tank 92 from the shallow geothermal buried pipe 5 and then enters the side shaft hole 962 of the neutralization pipe 96 from the hollow part, and the shallow geothermal water exchanges heat with the middle deep geothermal water to achieve the purpose of heat neutralization until the shallow geothermal water and the middle deep geothermal water flow out from the tail tank 93 into the high-temperature tank 10. In this way, the gradient neutralization device 9 can improve quality and stabilize pressure of geothermal water, which is beneficial to improving the quality of hot water output in the high-temperature tank 10, and further ensures the heating quality and the water supply quality on the conveying pipeline 3.
In order to improve the utilization rate of the three-section pipe 99, the diameter of the plugging portion 991 provided by the utility model is smaller than that of the clamping portion 992, and the diameter of the clamping portion 992 is larger than that of the buffer portion 993. In this way, the shoulder of the clamping portion 992 abuts against the inner end surface of the end cover 97, the clamping portion 992 is clamped between the end cover 97 and the middle box 92, so that the controllability of the distance between the end cover 97 and the middle box 92 is ensured, and the requirements that the neutralization pipe 96 and the plug-in portion 991 can be quickly plugged and sealed can be met.
In order to improve the heat exchange efficiency of the gradient neutralization device 9, the shallow hot water pipe 98 provided by the utility model comprises a main pipe 981, a plurality of branch pipes 982 are arranged on the main pipe 981, regulating valves are arranged on the branch pipes 982, flat pipes 983 are arranged at the end parts of the branch pipes 982, and the end parts of the flat pipes 983 are connected with a water pipe connection port 971. The main pipe and the branch pipe positioned on the side of the head box 91 are used as the water inlet end of the shallow geothermal water on the gradient neutralization device 9, the main pipe and the branch pipe positioned on the side of the tail box 93 are used as the water outlet end of the shallow geothermal water on the gradient neutralization device 9, and the flat pipe can improve the uniform distribution performance of the shallow geothermal water entering between the end cover 97 and the middle box 92, thereby being beneficial to the more uniform distribution of the shallow geothermal water into the side shaft holes 962 of different neutralization pipes 96 and further being beneficial to the heat exchange neutralization of the shallow geothermal water and the middle deep geothermal water. The gaps between the adjacent neutralization pipes 96 may be hollow to serve as a transport passage for shallow geothermal water other than the side shaft hole 962, may be filled to conduct solid heat, and may also ensure heat exchange between the medium in the center shaft hole 961 and the medium in the side shaft hole 962.
In order to improve the sufficiency of the hot water medium in the system, the utility model provides a water supplementing device 6 which is connected with the high temperature tank 10 and orderly supplements the hot water medium to the high temperature tank.
The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.
Claims (6)
1. The utility model provides a photovoltaic-geothermal-energy storage energy joint development system, including photovoltaic power plant, energy storage power plant and geothermal power plant, the energy storage power plant includes recharging generator set, the geothermal power plant includes geothermal well, recharging well and the pipeline of connecting geothermal well and recharging well, be provided with heat exchanger, heat pump unit, moisturizing device, a plurality of circulating pumps and valves on the pipeline, be provided with heating pipeline and supply line on the heat exchanger, the heating pipeline is used for being connected with the heating end of user side, the drain end of user side is connected with the heat pump unit, characterized in that, geothermal well is middle deep geothermal well, the geothermal power plant still includes shallow geothermal buried pipe, shallow geothermal buried pipe and geothermal well's output side are provided with gradient neutralization device, still be provided with high temperature pond, middle thermal pond and low temperature pond on the pipeline, the input side and the output side of high temperature pond are connected with gradient neutralization device and heat exchanger respectively, the input side of middle thermal pond is connected with heat pump unit and its output side is provided with the heating end of user side, the drain end of user side is connected with heat pump unit, the thermal pump unit is provided with the filter side is provided with the heat pump unit, the filter side is provided with the filter side is connected with the power plant, the filter side is provided with the electric power plant is provided with the filter medium thermal power plant, the filter side is provided with the filter medium thermal power plant is provided with the filter medium and the filter medium, the filter medium is provided with the filter medium is connected with the filter medium, the electric boiler is connected with a steam pipeline arranged inside the heat exchanger.
2. The photovoltaic-geothermal-energy storage energy joint development system according to claim 1, wherein the gradient neutralization device comprises a head tank, a middle tank and a tail tank which are sequentially connected end to end, pressure release valves are arranged on the head tank, connecting flanges are arranged on the head tank and the tail tank and used for connecting a middle deep hot water pipe, a plurality of neutralization pipes which are uniformly arranged and have oval cross sections are arranged in the middle tank, the neutralization pipes comprise middle shaft holes, two sides of the middle shaft holes are provided with a pair of side shaft holes, two ends of the middle tank are provided with end covers which are connected with the middle shaft holes in a covering mode, a plurality of water pipe connection ports are arranged on the end covers, shallow hot water pipes are arranged on the side faces of the end covers, a plurality of assembly holes which are in one-to-one correspondence with the middle shaft holes are formed in the assembly holes, three-section pipes comprise plug-in connection portions which are plugged with the middle shaft holes, plug-in connection portions which are clamped with the end covers and the end portions which are located on the other side of the end covers, and one end covers are provided with a plurality of through holes, and one end faces which are far away from the end covers are provided with the through holes.
3. The photovoltaic-geothermal-energy-storage energy co-generation system of claim 2, wherein the diameter of the socket is smaller than the diameter of the clip, and the diameter of the clip is larger than the diameter of the buffer.
4. The photovoltaic-geothermal-energy-storage combined development system according to claim 3, wherein the shallow hot water pipe comprises a main pipe, a plurality of branch pipes are arranged on the main pipe, regulating valves are arranged on the branch pipes, flat pipes are arranged at the end parts of the branch pipes, and the end parts of the flat pipes are connected with water pipe connectors.
5. The photovoltaic-geothermal-energy-storage combined development system of claim 4, wherein the water replenishment device is connected to a high temperature tank.
6. A photovoltaic-geothermal-energy-storage energy joint development method is characterized in that a geothermal station adopts a middle deep geothermal well and a shallow geothermal buried pipe to jointly perform heat extraction, hot water in the middle deep geothermal well and hot water in the shallow geothermal buried pipe are subjected to heat neutralization in a gradient neutralization device, hot water is subjected to quality improvement and pressure stabilization, all hot water subjected to quality improvement and pressure stabilization enters a high-temperature pond, geothermal water in the high-temperature pond enters a heat exchanger to exchange heat, an electric boiler heats the heat exchanger, hot water obtained in the heat exchanger is supplied to a user through a water supply pipeline, geothermal water is cooled to 35-45 ℃ and then enters a user through a heating pipeline, heating backwater cooled to 25-30 ℃ is heated to 30-40 ℃ and then enters a middle-temperature pond, hot water in the middle-temperature pond enters a commercial user to be utilized, backwater of the user and drainage of the heat pump set enter a low-temperature pond to be cooled to 20-25 ℃, the hot water enters a treatment system to be treated, geothermal backwater water is produced through the heat exchange heat in the high-temperature pond, the geothermal backwater is directly flows through a filter backwater pump to a power generation station through a filter and a power generation station to be conveyed to a filter and a power generation station, and a filter backwater power station is circulated to a power station through the geothermal water storage station to be used for power generation station.
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Denomination of invention: A photovoltaic geothermal energy storage joint development system and its method Granted publication date: 20231017 Pledgee: Jinan Rural Commercial Bank Co.,Ltd. Licheng sub branch Pledgor: SHANDONG DIKUANG NEW ENERGY CO.,LTD. Registration number: Y2024980007918 |
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