Geothermal energy utilization system

Abstract

An embodiment of the present application provides a geothermal energy utilization system including a cold working fluid tank, a geothermal well, a hot working fluid storage device, a steam generator, a high-pressure processor, and a turbine generator, wherein the cold working fluid tank is in communication with the geothermal well and sends a cold working fluid in the cold working fluid tank to the geothermal well for heat exchange to form a first hot working fluid; the geothermal well is in communication with the hot working fluid storage device and sends the first hot working fluid in the geothermal well to the hot working fluid storage device; the hot working fluid storage device is in communication with the steam generator and sends the first hot working fluid in the hot working fluid storage device to the steam generator so that water in the steam generator evaporates into steam; the steam generator is in communication with the high-pressure processor and sends steam in the steam generator to the high-pressure processor; and the high-pressure processor is in communication with the turbine generator such that the steam in the high-pressure processor is sent to the turbine generator to drive the turbine generator to generate electricity. The geothermal energy utilization system according to the embodiment of the present application improves the utilization efficiency of geothermal energy and has a wide range of applications.

Description

Technical Field

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[0005]

[0001] This application relates to the field of new energy utilization technologies, and particularly to a geothermal energy utilization system.

Background Art

[0002] In recent years, with the continuous improvement of the scientific and technological level, humanity has deepened its new understanding of renewable resources. Geothermal energy, as one of the newly discovered renewable resources, has stability, continuity, and high utilization efficiency. When using geothermal resources for power generation, it is hardly affected by the weather and can continuously supply power to the power grid. Geothermal energy is stored in the deep underground strata with penetration ability, and as the depth increases, the underground temperature also rises.

[0003] Currently, most geothermal power plants take in high-pressure hot water from deep underground, convert it into steam, drive a generator to generate electricity, cool the steam and condense it into water, and then inject it into the ground for reuse.

[0004] However, such a geothermal power generation method has problems such as high requirements for the temperature of groundwater, poor applicability, large energy loss during power generation, and low power generation efficiency.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The embodiments of this application provide a geothermal energy utilization system for solving the problems in the prior art, such as low efficiency of power generation using geothermal energy and large energy loss. [[ID=三十二]]

Means for Solving the Problems

[0006] The embodiments of this application provide a geothermal energy utilization system including a cold working fluid tank, a geothermal well, a hot working fluid storage device, a steam generator, a high-pressure processor, and a turbine generator.

[0007] The cold working fluid tank is for storing cold working fluid. The cold working fluid tank is connected to a geothermal well, and the cold working fluid in the cold working fluid tank is sent to the geothermal well for heat exchange to form the first hot working fluid.

[0008] The geothermal well is connected to a hot working fluid storage device, and the first hot working fluid in the geothermal well is sent to the hot working fluid storage device.

[0009] The hot working fluid storage device is connected to the steam generator and sends the first hot working fluid from the hot working fluid storage device to the steam generator for heat exchange, so that the liquid water in the steam generator evaporates into steam.

[0010] The steam generator is connected to the high-pressure processing machine, and the steam inside the steam generator is sent to the high-pressure processing machine for pressurization.

[0011] The high-pressure processing machine is connected to a turbine generator so that the steam inside the machine is sent to the turbine generator, which drives the turbine generator and generates electricity.

[0012] In one feasible form, in the geothermal energy utilization system provided in the embodiment of the present invention, the steam generator includes a first heating member and a steam generating member, the first heating member being for raising the temperature of the steam generating member so that the liquid water in the steam generating member evaporates into steam.

[0013] The first heating member is connected to a hot working fluid storage device such that a first hot working fluid is supplied from the hot working fluid storage device to the first heating member, and the first hot working fluid undergoes heat exchange within the first heating member to form a second hot working fluid.

[0014] The first steam outlet of the steam generating member is connected to the high-pressure processing machine so that the steam inside the steam generating member is sent to the high-pressure processing machine.

[0015] In one feasible form, in the geothermal energy utilization system provided in the embodiment of the present invention, the steam in the turbine generator turns into liquid water after driving the turbine generator to generate electricity, and the second water outlet of the turbine generator communicates with the first water inlet of the steam generating member so that the water in the turbine generator is sent to the steam generating member.

[0016] In one feasible form, the geothermal energy utilization system provided in the embodiment of the present invention further includes a heat exchange assembly for supplying thermal energy to an external facility, the heat exchange assembly including at least two heat exchangers, each heat exchanger including a second heating member for raising the temperature of a heating member, the second heating members of each heat exchanger being sequentially connected.

[0017] The first heating member is in communication with the second heating member such that the second hot working fluid is sent from the first heating member to the second heating member for heat exchange to form a cold working fluid, and the second heating member is in communication with the cold working fluid tank such that the cold working fluid is sent from the second heating member to the cold working fluid tank.

[0018] In one feasible embodiment, in the geothermal energy utilization system provided in the embodiment of the present invention, a high-pressure processor communicates with the second steam inlet of a turbine generator and sends steam to the turbine generator to drive the turbine generator and generate electricity, the second steam outlet of the turbine generator communicates with the third steam inlet of a heating member so that the steam remaining after driving the turbine generator and generating electricity is sent to the heating member, the third water outlet of the heating member communicates with the first water inlet of a steam generating member, and the steam in the heating member is cooled by liquid water before being sent to the steam generating member.

[0019] In one feasible form, in the geothermal energy utilization system provided in the embodiment of the present invention, the hot working fluid storage device is a hot working fluid tank.

[0020] In one possible embodiment, in the geothermal energy utilization system provided in the embodiments of the present application, the hot working fluid storage device is a hot working fluid sealed well.

[0021] In one possible embodiment, in the geothermal energy utilization system provided in the embodiments of the present application, a mechanical wheel, a wire rope, and a block are provided in the hot working fluid sealed well.

[0022] The block abuts against the inner wall of the hot working fluid sealed well. One end of the wire rope is connected to the block, and the other end of the wire rope is connected to the mechanical wheel. When the block rises, due to the rotation of the mechanical wheel, the wire rope is wound around the circumferential side of the mechanical wheel.

[0023] The mechanical wheel is connected to a mechanical generator. When the block descends, the block drives the mechanical wheel to rotate via the wire rope, thereby driving the mechanical generator to generate electricity.

[0024] In one possible embodiment, in the geothermal energy utilization system provided in the embodiments of the present application, the working fluid inlet and the working fluid outlet of the hot working fluid sealed well are located at the bottom of the hot working fluid sealed well.

[0025] When the first hot working fluid in the geothermal well is sent to the hot working fluid sealed well, the block is pushed to rise. When the first hot working fluid in the hot working fluid sealed well is sent out, the block descends due to gravity.

[0026] In one possible embodiment, in the geothermal energy utilization system provided in the embodiments of the present application, check valves are attached to both the working fluid inlet and the working fluid outlet of the hot working fluid sealed well.

Advantages of the Invention

[0027] The geothermal energy utilization system provided in the embodiments of the present application includes a cold working fluid tank, a geothermal well, a hot working fluid storage device, a steam generator, a high-pressure processor, and a turbine generator. The cold working fluid is sent from the cold working fluid tank to the geothermal well for heat exchange, and then forms the first hot working fluid. The first hot working fluid is sent from the geothermal well to the hot working fluid storage device, and then from the hot working fluid storage device to the steam generator. Thereby, the water in the steam generator evaporates into steam, and the steam is sent to the turbine generator after being pressurized by the high-pressure processor to generate electricity, converting geothermal energy into mechanical energy, and then converting mechanical energy into electrical energy to realize power generation by geothermal energy. By pressurizing the steam and increasing the rotational speed of the generator, the power generation efficiency can be effectively improved. Further, in the embodiments of the present application, a heat exchange assembly is also provided. The first hot working fluid forms the second hot working fluid after heat exchange in the steam generator, and the second hot working fluid enters the heat exchange assembly for heat exchange again to become external heating, further improving the energy utilization efficiency of geothermal energy and reducing heat energy loss.

Brief Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings necessary for the description of the embodiments or the prior art will be briefly described below. However, it is clear that the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. [Figure 1] It is a structural schematic diagram of the geothermal energy utilization system provided in the embodiments of the present application. [Figure 2] It is a structural schematic diagram of the heat exchanger in FIG. 1. [Figure 3] It is a schematic diagram of the communication structure of the steam generator, heat exchange assembly, high-pressure processor and turbine generator in FIG. 1. [Figure 4] It is a structural schematic diagram of the geothermal energy utilization system according to another embodiment of the present application. [Figure 5] Figure 4 is a schematic diagram of the structure of a hot working fluid sealed well. [Modes for carrying out the invention]

[0029] Obvious embodiments of the present application are shown in the drawings above and will be described in further detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but are intended to illustrate the concept of the present application to those skilled in the art by reference to specific embodiments.

[0030] This specification provides a detailed description of exemplary embodiments, illustrated in the drawings. Where the following description relates to the drawings, unless otherwise noted, the same numbers in different drawings indicate the same or similar elements. The embodiments described below in the exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present application, as described in detail in the appended claims.

[0031] As described in the background information, conventional technology involves creating geothermal wells to extract high-pressure hot water from deep underground and converting it into steam to generate electricity using geothermal energy. However, this method of power generation has low power generation efficiency, poor applicability, and significant geothermal energy loss during power generation, resulting in a low utilization rate of geothermal energy.

[0032] To address the technical challenges described above, the present invention provides a geothermal energy utilization system comprising a cold working fluid tank, a geothermal well, a hot working fluid storage device, a steam generator, a high-pressure processor, and a turbine generator. The cold working fluid in the cold working fluid tank is first sent to the geothermal well for heat exchange to form a first hot working fluid. The first hot working fluid is then sent to the hot working fluid storage device, and subsequently sent from the hot working fluid storage device to the steam generator. As a result, the water in the steam generator absorbs heat and evaporates into steam. The steam is then sent to the high-pressure processor for pressurization, and the resulting high-pressure steam is sent to the turbine generator to drive a steam turbine to rotate and generate electricity. By providing a hot working fluid storage device for storing the first hot working fluid, the loss of thermal energy during the transport of the working fluid can be reduced, and by pressurizing the steam, the rotational speed of the steam turbine can be increased, thereby improving the power generation efficiency. Furthermore, the geothermal energy utilization system of the embodiment of the present invention further includes a heat exchange assembly, in which the first hot working fluid, after heat exchange in the steam generator, forms a second hot working fluid, which is then sent to the heat exchange assembly to exchange heat and provide thermal energy to external equipment, thereby realizing the utilization of geothermal energy twice, reducing thermal energy loss and improving energy utilization efficiency.

[0033] The technical solutions of this application and how they solve the above-mentioned technical problems will be described in detail below with reference to specific embodiments. Several of the following specific embodiments can be combined with each other, and in some embodiments, detailed explanations of the same or similar concepts or processes will be omitted. The embodiments of this application will be described below with reference to the drawings.

[0034] As shown in Figure 1, the geothermal energy utilization system 100 of the embodiment of the present invention includes a cold working fluid tank 110, a geothermal well 120, a hot working fluid storage device 130, a steam generator 140, a high-pressure processing machine 150, and a turbine generator 160.

[0035] The cold working fluid tank 110 is used to store cold working fluid, and is connected to the geothermal well 120. The cold working fluid in the cold working fluid tank 110 is sent to the geothermal well 120 for heat exchange to form the first hot working fluid.

[0036] The geothermal well 120 is connected to the hot working fluid storage device 130, and the first hot working fluid in the geothermal well 120 is sent to the hot working fluid storage device 130.

[0037] The hot working fluid storage device 130 is in communication with the steam generator 140, and the first hot working fluid in the hot working fluid storage device 130 is sent to the steam generator 140 for heat exchange so that the liquid water in the steam generator 140 evaporates into steam.

[0038] The steam generator 140 is connected to the high-pressure processing machine 150, and the steam in the steam generator 140 is sent to the high-pressure processing machine 150 for pressurization.

[0039] The high-pressure processing machine 150 is connected to the turbine generator 160 so that the steam inside the high-pressure processing machine 150 is sent to the turbine generator 160, which drives the turbine generator 160 to generate electricity.

[0040] Furthermore, the cold working fluid stored in the cold working fluid tank 110 may be various fluids such as water, molten salt, or nanofluid. Geothermal energy is stored in deep underground geological formations with permeability, and as the depth increases, the underground temperature also rises. Therefore, it is necessary to select cold working fluids with different melting and boiling points depending on the depth of the geothermal well 120 and the underground temperature to improve the applicability of this geothermal energy utilization system. In addition, in the working fluid transport process, it is necessary to determine whether or not it is necessary to attach a cold working fluid pump or a hot working fluid pump to the transport piping to support transport, depending on the positional relationship between the cold working fluid tank 110, the geothermal well 120, the hot working fluid storage device 130, and the steam generator 140. This is not limited to the embodiments of the present invention.

[0041] In practical implementation, the geothermal well 120 may be a converted waste oil well with available geothermal energy, thereby reducing the construction cost of the geothermal energy utilization system. The geothermal energy utilization system of the embodiment of the present invention includes a plurality of geothermal wells 120, and a cold working fluid tank 110 is in communication with each geothermal well 120, and a cold working fluid pump draws cold working fluid from the cold working fluid tank 110 and sends it to each geothermal well 120. In some cases, it may be necessary to transport the first hot working fluid over long distances to the steam generator 140. Each geothermal well 120 is connected to the same hot working fluid storage device 130, and the distance between the geothermal wells 120 and the hot working fluid storage device 130 is relatively short. Therefore, all of the first hot working fluid in each geothermal well 120 is sent to the hot working fluid storage device 130 and then transported to the steam generator 140 by the hot working fluid storage device 130. This reduces the loss of thermal energy in the transport piping during the long-distance transport of the first hot working fluid and improves the utilization rate of geothermal energy.

[0042] Specifically, a temperature control valve may be installed in the piping that delivers the first hot working fluid to the geothermal well 120. After the cold working fluid in the cold working fluid tank 110 is delivered into the geothermal well 120, its temperature gradually rises to form the first hot working fluid. When the temperature control valve detects that the temperature of the working fluid in the geothermal well 120 is above a preset temperature, the temperature control valve turns on, and the first hot working fluid is delivered to the hot working fluid storage device 130. This ensures the temperature of the first hot working fluid delivered to the steam generator 140 and ensures power generation efficiency.

[0043] Furthermore, because the temperature inside the geothermal well 120 is constant, the working fluid's temperature remains constant after a certain period of heat exchange in the geothermal well 120. A timer valve can also be selected as the valve in the piping that delivers the first hot working fluid from the geothermal well 120. The timer valve starts timing after the cold working fluid is delivered to the geothermal well 120, and automatically opens after a preset time has elapsed. By controlling the temperature of the first hot working fluid in this manner, energy utilization rate and power generation efficiency are improved.

[0044] In the embodiment of the present invention, geothermal energy is converted into mechanical energy by a steam generator 140 and a high-pressure processing machine 150, and the mechanical energy is converted into electrical energy by a turbine generator 160, thereby realizing the effect of generating electricity using geothermal energy. After pressurizing the steam generated in the steam generator 140 with the high-pressure processing machine 150, this steam is sent to the turbine generator 160 to drive the turbine generator 160 and generate electricity, thereby increasing the rotational speed of the steam turbine and improving the power generation efficiency.

[0045] In some feasible forms, as shown in Figures 1 and 3, the steam generator 140 of the embodiment of the present application includes a first heating member 141 and a steam generating member 142, the first heating member 141 being for raising the temperature of the steam generating member 142 so that the liquid water inside the steam generating member 142 evaporates and turns into steam.

[0046] The first heating member 141 is connected to the hot working fluid storage device 130 so that the first hot working fluid is supplied from the hot working fluid storage device 130 to the first heating member 141, and the first hot working fluid undergoes heat exchange within the first heating member 141 to form the second hot working fluid.

[0047] The first steam outlet 1421 of the steam generating member 142 is connected to the high-pressure processing machine 150 so that the steam inside the steam generating member 142 is sent to the high-pressure processing machine 150.

[0048] In the embodiment of the present invention, the steam generator 140 includes a first heating member 141 and a steam generating member 142, the steam generating member 142 storing liquid water, and after the first hot working fluid is supplied to the first heating member 141, the first heating member 141 heats the water in the steam generating member 142. When the water receives heat, it evaporates into steam, and the temperature of the existing steam in the steam generating member 142 also rises, transferring a portion of the thermal energy of the first hot working fluid to the steam, thereby realizing the first utilization of geothermal energy. The temperature of the first hot working fluid then decreases, and a second hot working fluid is formed.

[0049] In specific implementation, after steam is generated in the steam generating member 142, the steam is transported to a high-pressure processing machine via the first steam outlet 1421 and pressurized to make the steam more suitable for power generation and improve the power generation efficiency of the steam.

[0050] In some feasible forms, as shown in Figures 1 and 3, the steam in the turbine generator 160 of the embodiment of the present invention drives the turbine generator 160 to generate electricity, and then becomes liquid water. The second water outlet 161 of the turbine generator 160 is connected to the first water inlet 1422 of the steam generating member 142 so that the water in the turbine generator 160 is sent to the steam generating member 142.

[0051] Furthermore, a second water outlet 161 is provided at the lower end of the turbine generator 160. After high-pressure steam drives the turbine generator 160 to generate electricity, a portion of the steam is cooled by liquid water. This liquid water then passes through the second water outlet 161 and the first water inlet 1422 into the steam generating member 142, where it is heated by the first heating member 141 and re-formed into steam. This enables the recycling of water resources, which is advantageous for resource conservation and reduces the power generation cost of the geothermal energy utilization system 100.

[0052] In some feasible forms, as shown in Figures 1, 2, and 3, the geothermal energy utilization system 100 of the embodiment of the present application further includes a heat exchange assembly 170 for supplying thermal energy to an external facility, the heat exchange assembly 170 including at least two heat exchangers 171, each heat exchanger 171 including a second heating member 1711 and a heating member 1712, the second heating member 1711 for raising the temperature of the heating member 1712, and the second heating members 1711 of each heat exchanger 171 are sequentially connected.

[0053] The first heating member 141 is in communication with the second heating member 1711 so that the second hot working fluid is sent from the first heating member 141 to the second heating member 1711 for heat exchange to form a cold working fluid, and the second heating member 1711 is in communication with the cold working fluid tank 110 so that the cold working fluid is sent from the second heating member 1711 to the cold working fluid tank 110.

[0054] In the embodiment of the present invention, the heat exchange assembly 170 enables the two-time use of geothermal energy. The heat exchange assembly 170 consists of at least two heat exchangers 171, each heat exchanger 171 including two parts: a second heating member 1711 and a heating member 1712, the heating member 1712 of which liquid water is stored. The second hot working fluid is discharged from the first heating member 141 and flows sequentially through the second heating member 1711 of each heat exchanger 171, thereby transferring the thermal energy in the second hot working fluid to the liquid water in the heating member 1712 of each heat exchanger 171, raising the temperature of the water. The temperature of the second hot working fluid then continuously decreases, eventually forming a cold working fluid. This cold working fluid is then transported to the cold working fluid tank 110 to achieve recycling, reduce the cost of using geothermal energy, and reduce geothermal energy loss by utilizing the thermal energy of the second hot working fluid, thereby improving the energy utilization rate.

[0055] In specific implementation, the heating component 1712 is connected to external equipment such as radiators or radiant floor heating, transports high-temperature water to the external equipment to provide thermal energy to the user, and recovers the cooled water, reheats it, and recycles it.

[0056] In some feasible configurations, as shown in Figures 1 and 3, the high-pressure processing machine 150 of the embodiment of the present application communicates with the second steam inlet 162 of the turbine generator 160 and sends steam to the turbine generator 160 to drive the turbine generator 160 and generate electricity. The second steam outlet 163 of the turbine generator 160 communicates with the third steam inlet 1712a of the heating member 1712 so that the steam remaining after the turbine generator 160 has been driven to generate electricity is sent to the heating member 1712. The third water outlet 1712b of the heating member 1712 communicates with the first water inlet 1422 of the steam generating member 142, and the steam in the heating member 1712 is cooled by liquid water before being sent to the steam generating member 142.

[0057] Furthermore, after the high-pressure steam enters the turbine generator 160 and drives the turbine generator 160 to generate electricity, some of the steam is cooled by liquid water, while some remains in gaseous form, and a certain amount of thermal energy still exists in the steam at this stage. The remaining steam is transported to the heating element 1712 via the second steam outlet 163 and the third steam inlet 1712a, where it exchanges heat with the water in the heating element 1712, and the steam is cooled by liquid water. At this time, the amount of liquid water in the heating element 1712 increases, and the excess liquid water can be discharged via the third water outlet 1712b and sent to the steam generating element 142 via the first water inlet 1422. This enables the recycling of water in the steam generator 140, reducing the cost of geothermal energy utilization. In addition, by making full use of the thermal energy remaining in the steam, the geothermal energy utilization rate of the geothermal energy utilization system 100 is further improved, and energy loss is reduced.

[0058] In some feasible forms, as shown in Figure 1, the hot working fluid storage device 130 of the embodiment of the present application is a hot working fluid tank 131.

[0059] In specific implementation, the hot working fluid storage device 130 may be a hot working fluid tank 131, which uses heat-insulating material, has a large capacity, can simultaneously store the first hot working fluid formed in multiple geothermal wells 120, plays a transient role in the geothermal energy utilization system, and reduces the loss of thermal energy due to long-distance transport of the first hot working fluid.

[0060] In some feasible forms, as shown in Figure 4, the hot working fluid storage device 130 of the embodiment of the present application is a hot working fluid sealed well 132.

[0061] In specific implementation, the hot working fluid storage device 130 may be a hot working fluid sealed well 132, and the hot working fluid sealed well 132 may be a modified waste oil well in order to reduce the construction cost of the geothermal energy utilization system.

[0062] In some feasible forms, as shown in Figures 4 and 5, a mechanical wheel 1321, a steel strand 1322, and a block 1323 are provided within the hot working fluid sealing well 132 of the embodiment of the present application.

[0063] The block 1323 abuts against the inner wall of the hot working fluid sealing well 132, one end of the steel strand 1322 is connected to the block 1323, and the other end of the steel strand 1322 is connected to the mechanical wheel 1321, and as the block 1323 rises, the rotation of the mechanical wheel 1321 causes the steel strand 1322 to wrap around the circumference of the mechanical wheel 1321.

[0064] The mechanical wheel 1321 is connected to the mechanical generator 180, and as the block 1323 descends, the block 1323 drives the mechanical wheel 1321 via the steel strand 1322 to rotate, thereby driving the mechanical generator 180 to generate electricity.

[0065] Furthermore, depending on the temperature of the first hot working fluid, the block 1323 may be made of a material whose melting point is higher than the temperature of the first hot working fluid. The outer wall of the block 1323 is in close contact with the inner wall of the hot working fluid sealing well 132, so that when the first hot working fluid is supplied to the hot working fluid sealing well 132, the first hot working fluid cannot flow out through the gap between the block 1323 and the hot working fluid sealing well 132, and the first hot working fluid is always kept below the block 1323. Both the outer wall of the block 1323 and the inner wall of the hot working fluid sealing well 132 are smooth surfaces so that the block 1323 can slide smoothly within the hot working fluid sealing well 132.

[0066] In specific implementation, the mechanical wheel 1321 may be connected to a motor, which can drive the mechanical wheel 1321 to rotate. When the block 1323 moves upward, the steel strand 1322 is loose and not subjected to tensile force, and the steel strand 1322 is wound by the mechanical wheel 1321 so as to wrap around the circumference of the mechanical wheel 1321. When the block 1323 descends due to gravity, a tensile force is applied to the steel strand 1322 by the block 1323, and the mechanical wheel 1321 is driven by the steel strand 1322 to rotate in the opposite direction to the winding of the steel strand 1322. The rotation of the mechanical wheel 1321 drives the mechanical generator 180 to generate electricity. This realizes the conversion of gravitational potential energy into electrical energy, improving energy utilization efficiency. The mechanical generator 180 can supply power to external equipment as well as to electrical equipment inside the geothermal energy utilization system 100, reducing the need for long-distance transport of electrical energy and improving the on-site consumption rate of electrical energy.

[0067] In some feasible embodiments, as shown in Figures 4 and 5, the working fluid inlet 1324 and working fluid outlet 1325 of the hot working fluid sealed well 132 of the embodiment of the present application are located at the bottom of the hot working fluid sealed well 132.

[0068] When the first hot working fluid in the geothermal well 120 is delivered to the hot working fluid sealed well 132, the block 1323 is pushed upward, and when the first hot working fluid is delivered to the hot working fluid sealed well 132, the block 1323 is lowered by gravity.

[0069] In the embodiment of the present invention, both the working fluid inlet 1324 and the working fluid outlet 1325 are located at the bottom of the hot working fluid sealed well 132, thereby ensuring that all of the first hot working fluid is located below the block 1323, and preventing the first hot working fluid from applying a downward force to the block 1323. The gravity acting on the first hot working fluid does work on it so that the first hot working fluid enters the hot working fluid sealed well 132 from the bottom of the hot working fluid sealed well 132, applying an upward force to the block 1323, moving the block 1323 upward and generating gravitational potential energy. After the first hot working fluid is discharged, the block 1323 descends due to the action of gravity, and the gravitational potential energy is converted into kinetic energy, which drives the mechanical wheel 1321 to rotate, thereby driving the mechanical generator 180 to generate electricity and converting the kinetic energy into electrical energy. This enables the storage and utilization of gravitational potential energy, further improving the energy utilization rate and power generation efficiency of the geothermal energy utilization system 100.

[0070] In some feasible configurations, as shown in Figure 5, a check valve 1326 is installed at both the working fluid inlet 1324 and the working fluid outlet 1325 of the hot working fluid sealed well 132 of the embodiment of the present invention.

[0071] In the embodiment of the present invention, by installing a check valve 1326, damage to the geothermal energy utilization system 100 due to backflow of the first hot working fluid in the hot working fluid sealed well 132 due to its own gravity or pressure from the block 1323 is effectively avoided, and the storage function of the hot working fluid sealed well 132 for the first hot working fluid is ensured.

[0072] In the description of the embodiments of this application, unless otherwise specifically defined or limited, the terms “attachment,” “connection,” and “linking” should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction relationship between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0073] The embodiments of this application do not necessarily indicate or imply that the devices or elements shown have a particular orientation, or are configured or operated in a particular orientation, and therefore should not be understood as limiting the invention. In the description of the embodiments of this application, “multiple” means two or more unless specifically and precisely defined otherwise.

[0074] The terms "first," "second," "third," "fourth," etc. (if any) in the description and claims of the embodiments of this application, as well as in the drawings, are terms used to distinguish similar subjects and do not need to be used to describe a specific order or priority. It should be understood that the data used in this manner is interchangeable under appropriate circumstances, for example, so that the embodiments of this application described herein may be carried out in an order other than that illustrated or described herein.

[0075] Furthermore, the terms “including” and “having,” and any variations thereof, are intended to cover exclusive inclusion, for example, processes, methods, systems, products, or apparatus that include a series of steps or units, which may include, but are not limited to, other steps or units that are not expressly described or that are specific to these processes, methods, products, or apparatus.

[0076] In this specification, "plural" means two or more.

[0077] The various numerical designations used in the embodiments of this application are distinguished for the sake of explanation and should be understood as not limiting the scope of the embodiments.

[0078] In the embodiments of this application, the magnitude of the number of each process does not indicate the execution order, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation processes of the embodiments of this application.

[0079] A person skilled in the art will readily conceive of other embodiments of the Application after considering this Specified and practicing the embodiments disclosed herein. The Application is intended to encompass any modifications, uses, or adaptations of the Application, including common or conventional means known in the Art and not disclosed herein, in accordance with the general principles of the Application. The Specified Description and Examples are illustrative, and the true scope and spirit of the Application are indicated by the following claims.

[0080] Please understand that this application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes are possible without exceeding its scope. The scope of this application is limited only to the attached claims.

[0081] This application claims priority to a Chinese patent application filed with the China National Intellectual Property Office on July 26, 2023, with application number 202310927986.6 and title "Geothermal Energy Utilization System," and all contents of said application are incorporated into this application by reference. [Explanation of Symbols]

[0082] 100…Geothermal energy utilization system 110... Cold working fluid tank 120... Geothermal wells 130...Hot working fluid storage device, 131...Hot working fluid tank, 132...Hot working fluid sealed well, 1321...Mechanical wheel, 1322...Steel stranded wire, 1323...Block, 1324...Working fluid inlet, 1325...Working fluid outlet, 1326...Check valve 140...Steam generator, 141...First heating element, 142...Steam generating element, 1421...First steam outlet, 1422...First water inlet 150... High-pressure processing machine 160...Turbine generator, 161...Second water outlet, 162...Second steam inlet, 163...Second steam outlet 170...Heat exchange assembly, 171...Heat exchanger, 1711...Second heating element, 1712...Heating element, 1712a...Third steam inlet, 1712b...Third water outlet 180... Mechanical generator.

Claims

1. A geothermal energy utilization system, It includes a cold working fluid tank, a geothermal well, a hot working fluid storage device, a steam generator, a high-pressure processing machine, and a turbine generator. The cold working fluid tank stores cold working fluid, the cold working fluid tank is in communication with the geothermal well, and the cold working fluid in the cold working fluid tank is sent to the geothermal well for heat exchange to form a first hot working fluid. The geothermal well is connected to the hot working fluid storage device, and the first hot working fluid in the geothermal well is sent to the hot working fluid storage device. The hot working fluid storage device is in communication with the steam generator, and the first hot working fluid in the hot working fluid storage device is sent to the steam generator to exchange heat so that the liquid water in the steam generator evaporates into steam. The steam generator is in communication with the high-pressure processing machine, and the steam in the steam generator is sent to the high-pressure processing machine and pressurized. The high-pressure processing machine is connected to the turbine generator so that the steam inside the high-pressure processing machine is sent to the turbine generator to drive the turbine generator and generate electricity. The geothermal energy utilization system further includes a heat exchange assembly for supplying thermal energy to external equipment, the heat exchange assembly including at least two heat exchangers, each heat exchanger including a second heating member and a heating member, the second heating member being for raising the temperature of the heating member, and the second heating members of each heat exchanger being sequentially connected. A geothermal energy utilization system characterized by the following features.

2. The steam generator includes a first heating member and a steam generating member, the first heating member being for raising the temperature of the steam generating member so that the liquid water inside the steam generating member evaporates and turns into steam, The first heating member is connected to the hot working fluid storage device such that the first hot working fluid is supplied to the first heating member from the hot working fluid storage device, and the first hot working fluid undergoes heat exchange within the first heating member to form a second hot working fluid. The first steam outlet of the steam generating member is connected to the high-pressure processing machine so that the steam inside the steam generating member is sent to the high-pressure processing machine. The geothermal energy utilization system according to feature 1.

3. The steam in the turbine generator turns into liquid water after driving the turbine generator to generate electricity, and the second water outlet of the turbine generator is connected to the first water inlet of the steam generating member so that the water in the turbine generator is sent to the steam generating member. The geothermal energy utilization system according to feature 2.

4. The first heating member is in communication with the second heating member such that the second hot working fluid is sent from the first heating member to the second heating member and heat exchange occurs to form the cold working fluid, and the second heating member is in communication with the cold working fluid tank such that the cold working fluid is sent from the second heating member to the cold working fluid tank. The geothermal energy utilization system according to feature 3.

5. The high-pressure processing machine communicates with the second steam inlet of the turbine generator and sends steam to the turbine generator to drive the turbine generator and generate electricity. The second steam outlet of the turbine generator communicates with the third steam inlet of the heating member so that the steam remaining after the turbine generator has been driven to generate electricity is sent to the heating member. The third water outlet of the heating member communicates with the first water inlet of the steam generating member, and the steam in the heating member is cooled by liquid water before being sent to the steam generating member. The geothermal energy utilization system according to feature 4.

6. The aforementioned hot working fluid storage device is a hot working fluid tank. A geothermal energy utilization system according to any one of claims 1 to 5.

7. The aforementioned hot working fluid storage device is a hot working fluid sealing well. A geothermal energy utilization system according to any one of claims 1 to 5.

8. A mechanical wheel, a steel strand, and a block are provided within the hot working fluid sealing well. The block abuts against the inner wall of the hot working fluid sealing well, one end of the steel strand is connected to the block, and the other end of the steel strand is connected to the mechanical wheel, and as the block rises, the rotation of the mechanical wheel causes the steel strand to wrap around the circumference of the mechanical wheel. The mechanical wheel is connected to a mechanical generator, and as the block descends, the block drives the mechanical wheel via the steel strands to rotate, thereby driving the mechanical generator to generate electricity. The geothermal energy utilization system according to feature 7.

9. The working fluid inlet and outlet of the hot working fluid sealed well are located at the bottom of the hot working fluid sealed well. When the first hot working fluid in the geothermal well is discharged into the hot working fluid sealing well, the block is pushed upward, and when the first hot working fluid in the hot working fluid sealing well is discharged, the block is lowered by gravity. The geothermal energy utilization system according to feature 8.

10. A check valve is installed at both the working fluid inlet and the working fluid outlet of the aforementioned hot working fluid sealed well. The geothermal energy utilization system according to feature 9.

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