A geothermal energy extraction device

Abstract

A geothermal energy extraction device includes: an equipment platform installed on the ground surface; two protective sleeves inserted into a geothermal well; heat-conducting rods installed inside the protective sleeves; a heat-absorbing box detachably connected to the top of the heat-conducting rods; a circulation pipe installed in the protective sleeves, with both ends of the circulation pipe penetrating the protective sleeves; a serpentine heat exchanger connecting the bottoms of the two circulation pipes; a heat-absorbing plate mechanism installed outside the serpentine heat exchanger; and a heat exchange assembly installed at the top of one of the circulation pipes. The heat-absorbing box can absorb heat energy from the geothermal well at any time, keeping the water in the heat-absorbing box warm. In winter, geothermal extraction personnel can store domestic water in the heat-absorbing box for temporary use, solving the temporary domestic water needs of geothermal energy extraction in winter. The protective plate is installed around the serpentine heat exchanger, which conducts heat from below the geothermal well upwards, reducing the temperature difference between the upper and lower parts of the serpentine heat exchanger and increasing heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of geothermal extraction technology, and more specifically, to a device for geothermal energy extraction. Background Technology

[0002] Geothermal energy is stored underground and is unaffected by climate conditions. It can be used as both base load and peak load energy. In terms of development and utilization costs, geothermal energy has greater development potential compared to other renewable energy sources.

[0003] Patent CN217209902U discloses a network-connected medium-deep geothermal energy extraction device, including a connecting main water pipe, a fixing plate, and a circulating water pump. There are two connecting main water pipes. A fixing device is provided on the fixing plate at the connection point with the connecting main water pipe. The connecting main water pipe is fixed to the connecting main water pipe through the fixing device. A connecting hose is provided at the bottom end of the connecting main water pipe. A compensation mechanism is provided at the lower end of the connecting main water pipe.

[0004] This patent can only collect data. In winter, when the surface temperature is low, geothermal energy cannot solve the problem of keeping miners warm. Also, if the height difference of the hose is too large, there will be temperature differences, which will reduce the heat exchange efficiency. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a geothermal energy extraction device that can extract and utilize thermal energy simultaneously, and can increase heat exchange efficiency.

[0006] A geothermal energy extraction device includes: an equipment platform disposed on the ground surface; two protective sleeves inserted into a geothermal well; a heat-conducting rod disposed within the protective sleeve; a heat-absorbing box detachably connected to the top of the heat-conducting rod; a circulation pipe disposed within the protective sleeve, with both its upper and lower ends penetrating the protective sleeve; a serpentine heat exchanger connecting the bottoms of the two circulation pipes; a heat-absorbing plate mechanism disposed outside the serpentine heat exchanger; and a heat exchange assembly disposed at the top of one of the circulation pipes.

[0007] Furthermore, the bottom of the protective casing is fitted to the bottom of the geothermal well, the top of the protective casing penetrates the equipment platform, and a sealing cap is provided on the top of the protective casing.

[0008] Furthermore, the bottom of the heat-conducting rod is inserted into the bottom of the geothermal well, the top of the heat-conducting rod penetrates the sealing cap, the heat-conducting rod fits into the sealing cap, and a connecting post is provided at the top of the heat-conducting rod.

[0009] Furthermore, the heat absorption box is filled with water, and a spiral tube is provided in the heat absorption box. The end of the spiral tube is provided with a connecting part, which penetrates the heat absorption box and can be inserted into the connecting column.

[0010] Furthermore, the circulation tube is C-shaped, and the top of the circulation tube is located above the equipment platform.

[0011] Furthermore, the serpentine heat exchange tube is provided in several parts, and the serpentine heat exchange tube is made of a thermally conductive material.

[0012] Furthermore, the heat-absorbing plate mechanism includes a positioning block, a support plate, and a protective plate. The positioning block is located on the side wall of the protective sleeve, the support plate connects the two positioning blocks, and the protective plate is located at the bottom of the support plate.

[0013] Furthermore, the positioning block is provided with a groove, both ends of the support plate are placed into the groove, the support plate and the groove are connected by bolts, and the protective plate surrounds the serpentine heat exchange tube.

[0014] Furthermore, the heat exchange assembly includes two heat exchangers and a hot water tank, the hot water tank being connected to the heat exchangers, and each heat exchanger's outlet pipe being equipped with a solenoid valve.

[0015] Furthermore, the heat exchanger is connected to a circulation pump, which is connected to the top of another circulation pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] ① The heat absorber can absorb heat energy from the geothermal well at any time, keeping the water inside warm. During winter, geothermal workers can store domestic water in the heat absorber for temporary use, addressing the temporary domestic water needs of geothermal energy extraction during the winter. At other times, the heat absorber can be replaced for heat storage, allowing the collected geothermal energy to continue to be utilized. The combination of the heat absorber and heat-conducting rods further increases the efficiency of geothermal energy extraction and utilization.

[0018] ② The protective plate is placed around the serpentine heat exchange tube. The protective plate conducts the heat from the geothermal source upwards, reducing the temperature difference between the upper and lower parts of the serpentine heat exchange tube and increasing the heat exchange efficiency. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a geothermal energy extraction device.

[0021] Figure 2 This is a cross-sectional view of a component used in a geothermal energy extraction device.

[0022] In the diagram: 1. Equipment platform; 11. Support; 2. Protective sleeve; 21. Sealing cap; 3. Heat-conducting rod; 31. Connecting column; 4. Heat absorption box; 41. Spiral finned tube; 42. Connecting part; 5. Circulation pipe; 6. Serpentine heat exchanger; 7. Heat absorption plate mechanism; 71. Positioning block; 711. Groove; 72. Support plate; 73. Protective plate; 8. Heat exchange assembly; 81. Heat exchanger; 811. Solenoid valve; 82. Heat exchange tank; 9. Circulation pump. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , Figure 2 As shown, a geothermal energy extraction device includes: an equipment platform 1 installed on the ground surface; a protective casing 2 inserted into a geothermal well, wherein two protective casings 2 are provided; a heat-conducting rod 3 installed inside the protective casing 2; a heat-absorbing box 4 detachably connected to the top of the heat-conducting rod 3; a circulation pipe 5 installed in the protective casing 2, wherein both the upper and lower ends of the circulation pipe 5 penetrate the protective casing 2; a serpentine heat exchange pipe 6 connecting the bottoms of the two circulation pipes 5; a heat-absorbing plate mechanism 7 installed outside the serpentine heat exchange pipe 6; and a heat exchange assembly 8 installed at the top of one of the circulation pipes 5.

[0025] Equipment platform 1 is located above the geothermal well and is used to install and place the equipment used for geothermal development above ground. A support frame 11 is provided on equipment platform 1, and the heat absorption box 4 can be placed on the support frame 11.

[0026] The protective sleeve 2 is used to protect and position the side walls of the heat-conducting rod 3 and the circulation pipe 5. The protective sleeve 2 is vertically inserted into the geothermal well, with its bottom fitting against the bottom of the geothermal well and its top penetrating the equipment platform 1. The equipment platform 1 positions the protective sleeve 2 and prevents it from tilting. A sealing cap 21 is provided at the top of the protective sleeve 2 to reduce heat loss and improve the efficiency of geothermal energy collection.

[0027] The heat-conducting rod 3 is made of a metal with high thermal conductivity, such as copper or tungsten copper alloy. The bottom of the heat-conducting rod 3 is inserted into the bottom of the geothermal well, and the geothermal well fixes the bottom of the heat-conducting rod 3. The protective sleeve 2 limits the tilt angle of the heat-conducting rod 3 to prevent excessive deviation of the heat-conducting plate. The top of the heat-conducting rod 3 passes through the sealing cap 21, and the heat-conducting rod 3 fits against the sealing cap 21. The heat-conducting rod 3 conducts the temperature in the geothermal well upward. The protective sleeve 2 also plays a role in heat preservation, reducing some heat loss. The top of the heat-conducting rod 3 is provided with a connecting post 31, which is used to further conduct and collect the temperature of the heat-conducting rod 3.

[0028] The heat-absorbing box 4 is connected to the heat-conducting rod 3, enabling the utilization of the heat transferred by the heat-conducting rod 3. The heat-absorbing box 4 is filled with water and contains a spiral finned tube 41. The end of the spiral finned tube 41 has a connecting part 42 that penetrates the heat-absorbing box 4 and can be inserted into a connecting column 31. The connecting column 31 transfers heat to the connecting part 42 and the spiral finned tube 41. The spiral finned tube 41 increases the heat dissipation area, facilitating better heat transfer. The heat-absorbing box 4 can absorb heat energy from the geothermal well at any time, keeping the water in the heat-absorbing box 4 warm. In winter, geothermal collectors can store domestic water in the heat-absorbing box 4 for temporary use, addressing the temporary domestic water needs during winter geothermal energy extraction. At other times, the heat-absorbing box 4 can be replaced for heat storage, allowing the geothermal energy collected in the heat-absorbing box 4 to continue to be utilized. The combination of the heat-absorbing box 4 and the heat-conducting rod 3 further increases the efficiency of geothermal energy extraction and utilization.

[0029] The circulation pipe 5 is C-shaped, with its top positioned above the equipment platform 1. The protective sleeve 2 has through holes corresponding to the top and bottom ends of the circulation pipe 5. The two ends of the circulation pipe 5 pass through these through holes and are then welded together, preventing the circulation pipe 5 from detaching from the protective sleeve 2 and ensuring stable water flow within the circulation pipe 5. In operation, low-temperature water is injected into one circulation pipe 5, then heated through a serpentine heat exchanger 6. High-temperature water then flows out from the other circulation pipe 5, thus completing the geothermal extraction cycle.

[0030] Several serpentine heat exchange tubes 6 are provided. The serpentine heat exchange tubes 6 are made of thermally conductive material. The diameter of the serpentine heat exchange tubes 6 is smaller than that of the port of the circulation pipe 5. Cold water enters multiple serpentine heat exchange tubes 6 to increase the heat exchange area, thereby increasing the heating speed of the cold water and improving the efficiency of thermal energy extraction.

[0031] The heat absorption plate mechanism 7 includes a positioning block 71, a support plate 72, and a protective plate 73. The positioning block 71 is welded to the side wall of the protective sleeve 2. The support plate 72 connects the two positioning blocks 71, keeping the distance between the two positioning blocks 71 and the protective sleeve 2 unchanged and maintaining the stability of the protective sleeve 2. The protective plate 73 is welded to the bottom of the support plate 72, and the bottom of the protective plate 73 is flush with the bottom of the protective sleeve 2. The protective plate 73 is made of a thermally conductive material and is located on the periphery of the serpentine heat exchange tube 6. The protective plate 73 conducts the heat from below the geothermal system upward, reducing the temperature difference between the upper and lower parts of the serpentine heat exchange tube 6 and increasing the heat exchange efficiency.

[0032] The positioning block 71 is provided with a groove 711. The two ends of the support plate 72 are placed into the groove 711. The support plate 72 and the groove 711 are connected by bolts, so that the distance between the two positioning blocks 71 is the same as that between the support plate 72, and the middle parts of the two protective sleeves 2 are connected. When disassembly is required, the bolts can be removed.

[0033] After passing through the serpentine heat exchanger tube 6, the hot water enters the heat exchange assembly 8 through the circulation pipe 5 for heat exchange. The heat exchange assembly 8 includes two heat exchangers 81 and a hot water tank 82. The hot water tank 82 is connected to the heat exchangers 81. The hot water tank 82 injects cold water into the heat exchangers 81 to exchange heat with the heated hot water, thereby increasing the heat capacity of the hot water tank 82. Each heat exchanger 81 is equipped with a solenoid valve 811 on its outlet pipe. The solenoid valve 811 controls which heat exchanger 81 the heated hot water enters. The two heat exchangers 81 operate alternately, using the other heat exchanger 81 when switching between the two hot water tanks.

[0034] The heat exchanger 81 is connected to a circulation pump 9 via a flange. The circulation pump 9 is connected to the top of another circulation pipe 5. After the circulation pump 9 is started, the water is circulated, thus starting the thermal energy extraction operation.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for geothermal energy extraction, characterized in that, include: Equipment platform (1) located on the ground surface; A protective casing (2) is inserted into the geothermal well, and two protective casings (2) are provided; A heat-conducting rod (3) is disposed inside the protective sleeve (2); A heat-absorbing box (4) is detachably connected to the top of the heat-conducting rod (3); A circulation pipe (5) is provided in the protective sleeve (2), and both the upper and lower ends of the circulation pipe (5) penetrate the protective sleeve (2); A serpentine heat exchange tube (6) connects the bottom of the two circulating tubes (5); The heat absorption plate mechanism (7) is located outside the serpentine heat exchange tube (6); and A heat exchange assembly (8) is disposed at the top of one of the circulation pipes (5).

2. The geothermal energy extraction device according to claim 1, characterized in that: The bottom of the protective sleeve (2) is attached to the bottom of the geothermal well, the top of the protective sleeve (2) penetrates the equipment platform (1), and a sealing cap (21) is provided on the top of the protective sleeve (2).

3. The geothermal energy extraction device according to claim 2, characterized in that: The bottom of the heat-conducting rod (3) is inserted into the bottom of the geothermal well, the top of the heat-conducting rod (3) passes through the sealing cap (21), the heat-conducting rod (3) fits the sealing cap (21), and the top of the heat-conducting rod (3) is provided with a connecting post (31).

4. A geothermal energy extraction device according to claim 3, characterized in that: The heat absorption box (4) is filled with water. The heat absorption box (4) is provided with a spiral tube (41). The end of the spiral tube (41) is provided with a connecting part (42). The connecting part (42) penetrates the heat absorption box (4) and can be inserted into the connecting column (31).

5. A geothermal energy extraction device according to claim 4, characterized in that: The circulation pipe (5) is C-shaped, and the top of the circulation pipe (5) is located above the equipment platform (1).

6. A geothermal energy extraction device according to claim 5, characterized in that: The serpentine heat exchange tube (6) is provided with several tubes, and the serpentine heat exchange tube (6) is made of a thermally conductive material.

7. A geothermal energy extraction device according to claim 6, characterized in that: The heat absorption plate mechanism (7) includes a positioning block (71), a support plate (72) and a protective plate (73). The positioning block (71) is located on the side wall of the protective sleeve (2). The support plate (72) connects the two positioning blocks (71). The protective plate (73) is located at the bottom of the support plate (72).

8. A geothermal energy extraction device according to claim 7, characterized in that: The positioning block (71) is provided with a groove (711), and both ends of the support plate (72) are placed into the groove (711). The support plate (72) and the groove (711) are connected by bolts, and the protective plate (73) surrounds the serpentine heat exchange tube (6).

9. A geothermal energy extraction device according to claim 8, characterized in that: The heat exchange assembly (8) includes two heat exchangers (81) and a hot water tank (82). The hot water tank (82) is connected to the heat exchangers (81). Each heat exchanger (81) is equipped with a solenoid valve (811) on its outlet pipe.

10. A geothermal energy extraction device according to claim 9, characterized in that: The heat exchanger (81) is connected to a circulation pump (9), which is connected to the top of another circulation pipe (5).

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