A medium-deep geothermal heating unit

Abstract

The application discloses a kind of middle deep geothermal heating unit, it is related to geothermal heating technical field, including water collecting tank, the water collecting tank one side outer wall is fixedly connected with two water suction pipe, two The outer surface of water suction pipe is fixedly installed with deep well submersible pump, the water collecting tank front is fixedly connected with sealing door, the water collecting tank is fixedly connected with the load plate on the outer wall of side away from sealing door, by the cleaning scraper of servo motor, threaded rod, mobile seat drive being set, can periodically automatically scrape and remove the silt, scale and large particle impurities adhered to the inner wall of box, and push impurities to sealing door place and concentrate processing, and cooperate with coarse filter screen, fine filter screen and activated carbon plate multiple filtration, effectively intercept each kind of impurities from large particle to micro fine mineral, substantially reduce the risk of fouling and corrosion of geothermal fluid in pipeline and heat exchange equipment, guarantee the heat transfer efficiency, prolong the overall service life of equipment, reduce maintenance frequency and the use of chemical cleaning agent.

Description

Technical Field

[0001] This invention relates to the field of geothermal heating technology, and more particularly to a medium-deep geothermal heating unit. Background Technology

[0002] Geothermal heating units are a combination of equipment that utilizes geothermal energy to heat buildings. They primarily extract heat from the ground, convert and transmit it through a series of processes, and ultimately provide the building with the necessary heat to maintain a warm and comfortable indoor environment. Meanwhile, with the improvement of people's living standards and the increasing demands for comfortable living environments, the demand for winter heating continues to grow. Especially in cold northern regions and some high-altitude areas, heating has become a necessity to ensure residents' basic quality of life.

[0003] In existing technologies, geothermal fluids typically contain various minerals and impurities. During the heating and circulation process, scale easily forms on the inner walls of equipment and pipes, affecting heat transfer efficiency and increasing energy consumption. If the minerals and impurities contained in the geothermal fluids are not removed, these minerals and impurities may also cause corrosion of equipment and pipes, shorten the service life of the equipment, and increase maintenance costs. Therefore, a medium-deep geothermal heating unit is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the tendency for scale to form on the inner walls of equipment and pipes during heating and circulation, which affects heat transfer efficiency and increases energy consumption. Therefore, this invention proposes a medium-deep geothermal heating unit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A medium-deep geothermal heating unit includes a water collection tank. Two pumping pipes are fixedly connected to one outer wall of the water collection tank. A deep well submersible pump is fixedly installed on the outer surface of the two pumping pipes. A sealed door is fixedly connected to the front of the water collection tank. A carrying plate is fixedly connected to the outer wall of the water collection tank away from the sealed door. A servo motor is fixedly connected to the top of the carrying plate. A first rotating wheel is fixedly connected to the output end of the servo motor. A second rotating wheel is rotatably connected to the outer surface of the first rotating wheel via a track. Threaded rods are fixedly connected to the ends of both the first and second rotating wheels away from the servo motor. A movable base is threaded onto the surface of the water collection tank, and a cleaning scraper is fixedly connected to the bottom of the movable base. A water outlet pipe is fixedly connected to the outer wall of the water collection tank on the side away from the water pump pipe. A water pump is installed on the outer surface of the water outlet pipe. A coarse filter screen is installed at the water inlet at one end of the water outlet pipe, and a filter box is threaded onto the other end. A fine filter screen and an activated carbon plate are respectively installed inside the filter box. A water inlet hose is threaded onto the top of the filter box. A heat exchange box is fixedly connected to the end of the water inlet hose away from the filter box. A serpentine tube is installed inside the heat exchange box, and a heating device is fixedly connected to the end of the serpentine tube away from the heat exchange box.

[0006] Furthermore, the top two ends of the water collection tank are fixedly connected to support plates, and the threaded rod is arranged between the support plates and rotatably connected to the support plates through bearings.

[0007] Furthermore, the outer wall of the cleaning scraper is provided with two vertical baffles. One end of the baffles abuts against the left and right inner walls of the water collection tank, and the vertical baffles on the outer wall of the scraper abut against the left and right inner walls of the tank, ensuring that the mud, sand and scale adhering to the inner wall of the water collection tank can be thoroughly scraped off.

[0008] Furthermore, a support platform is fixedly connected to the upper surface of the water collection tank, and the heat exchange box is fixedly connected to the water collection tank through the support platform, integrating the heat exchange box and the water collection tank into one unit, saving space and creating a compact structure.

[0009] Furthermore, the top of the water collection tank is provided with two limiting grooves, and the bottom of the movable seat extends into the water collection tank through the limiting grooves and slides on the top of the water collection tank, limiting the movement trajectory of the movable seat and preventing the cleaning scraper from deviating or getting stuck.

[0010] Furthermore, multiple drain pipes are fixedly connected to the outer wall of the heat exchange box on the side away from the filter box, and a reinjection pump is installed on the outer surface of the multiple drain pipes to achieve the environmental protection goal of "extracting heat without consuming water", maintain the balance of groundwater level and the pressure of heat reservoir, and avoid ground subsidence and environmental pollution.

[0011] Furthermore, a controller is fixedly connected to the outer surface of the sealing door, and the controller is electrically connected to the deep well submersible pump, servo motor, water pump and reinjection pump.

[0012] Furthermore, a liquid level sensor is fixedly connected to the inner wall of the water collection tank. The liquid level sensor is electrically connected to the deep well submersible pump. The liquid level sensor is configured to send a stop signal to the deep well submersible pump when the water level in the water collection tank reaches a first preset threshold, and to send a start signal to the deep well submersible pump when the water level is lower than a second preset threshold.

[0013] Furthermore, the end of the serpentine tube away from the heat exchange box extends through the heat exchange box to the outside, and the outer wall of the end of the serpentine tube extending to the outside is covered with an insulation layer. The outer wall of the part of the serpentine tube extending out of the heat exchange box is also covered with an insulation layer, which effectively reduces the loss of heat during the process of transporting it to the heating equipment.

[0014] The present invention has the following beneficial effects: In this invention, a cleaning scraper driven by a servo motor, threaded rod, and moving seat can periodically and automatically scrape away mud, scale, and large particles of impurities adhering to the inner wall of the tank. The impurities are then pushed to the sealed door for centralized treatment. In conjunction with multiple filtrations using coarse and fine filters and activated carbon plates, various impurities ranging from large particles to fine minerals are effectively intercepted. This significantly reduces the risk of scaling and corrosion of geothermal fluids in pipes and heat exchange equipment, ensuring heat transfer efficiency, extending the overall service life of the equipment, and reducing the frequency of maintenance and the use of chemical cleaning agents. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a medium-deep geothermal heating unit proposed in this invention; Figure 2 This is a three-dimensional view of the back of the overall structure in this invention; Figure 3 This is a three-dimensional schematic diagram of the internal structure of the heat exchanger box in this invention; Figure 4 This is a three-dimensional schematic diagram of a portion of the structure in this invention; Figure 5 This is a three-dimensional schematic diagram of the internal structure of the water collection tank in this invention; Figure 6 This is a three-dimensional schematic diagram of the internal structure of the filter box in this invention.

[0016] In the diagram: 1. Water collection tank; 2. Pumping pipe; 3. Deep well submersible pump; 4. Sealing door; 5. Loading plate; 6. Servo motor; 7. First impeller; 8. Second impeller; 9. Threaded rod; 10. Moving seat; 11. Cleaning scraper; 12. Water outlet pipe; 13. Pump; 14. Coarse filter screen; 15. Filter box; 16. Fine filter screen; 17. Activated carbon plate; 18. Inlet hose; 19. Heat exchanger; 20. Serpentine pipe; 21. Heating equipment; 22. Support plate; 23. Drain pipe; 24. Recharge pump; 25. Controller; 26. Liquid level sensor. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 - Figure 6 As shown, the present invention proposes a medium-deep geothermal heating unit, comprising a water collection tank 1, two pumping pipes 2 fixedly connected to one side of the outer wall of the water collection tank 1, a deep well submersible pump 3 fixedly installed on the outer surface of the two pumping pipes 2, a sealing door 4 fixedly connected to the front of the water collection tank 1, a carrying plate 5 fixedly connected to the outer wall of the water collection tank 1 away from the sealing door 4, a servo motor 6 fixedly connected to the top of the carrying plate 5, a first rotating wheel 7 fixedly connected to the output end of the servo motor 6, a second rotating wheel 8 rotatably connected to the outer surface of the first rotating wheel 7 via a track, and threaded rods 9 fixedly connected to the ends of the first rotating wheel 7 and the second rotating wheel 8 away from the servo motor 6, with a moving rod threadedly connected to the outer surface of the threaded rod 9. The movable base 10 has a cleaning scraper 11 fixedly connected to its bottom. The water collection tank 1 has an outlet pipe 12 fixedly connected to its outer wall on the side away from the water pump pipe 2. A water pump 13 is installed on the outer surface of the outlet pipe 12. A coarse filter screen 14 is installed at the water inlet of one end of the outlet pipe 12, and a filter box 15 is threadedly connected to the other end. A fine filter screen 16 and an activated carbon plate 17 are respectively installed inside the filter box 15. A water inlet hose 18 is threadedly connected to the top of the filter box 15. A heat exchange box 19 is fixedly connected to the end of the water inlet hose 18 away from the filter box 15. A serpentine tube 20 is installed inside the heat exchange box 19. A heating device 21 is fixedly connected to the end of the serpentine tube 20 away from the heat exchange box 19.

[0019] Support plates 22 are fixedly connected to both ends of the top of the water collection tank 1. Threaded rods 9 are arranged between the support plates 22 and are rotatably connected to the support plates 22 through bearings.

[0020] The outer wall of the cleaning scraper 11 is provided with two vertical baffles, one end of which abuts against the left and right inner walls of the water collection tank 1.

[0021] A support platform is fixedly connected to the upper surface of the water collection tank 1, and the heat exchange box 19 is fixedly connected to the water collection tank 1 through the support platform.

[0022] Two limiting grooves are provided on the top of the water collection tank 1, and the bottom of the movable seat 10 extends into the water collection tank 1 through the limiting grooves and slides on the top of the water collection tank 1.

[0023] Multiple drain pipes 23 are fixedly connected to the outer wall of the heat exchange box 19 on the side away from the filter box 15, and a recharge pump 24 is installed on the outer surface of the multiple drain pipes 23.

[0024] A controller 25 is fixedly connected to the outer surface of the sealing door 4. The controller 25 is electrically connected to the deep well submersible pump 3, the servo motor 6, the water pump 13, and the reinjection pump 24.

[0025] A liquid level sensor 26 is fixedly connected to the inner wall of the water collection tank 1, and the liquid level sensor 26 is electrically connected to the deep well submersible pump 3.

[0026] The end of the serpentine tube 20 away from the heat exchange box 19 extends through the heat exchange box 19 to the outside, and the outer wall of the end of the serpentine tube 20 extending to the outside is covered with a heat insulation layer.

[0027] In this embodiment, a deep well submersible pump 3 extracts medium-deep geothermal water into a collection tank 1. When the water level in the collection tank 1 reaches a preset threshold, a stop signal is sent to the controller 25. The controller 25 controls the deep well submersible pump 3 to stop extracting geothermal water and starts the pump 13. The geothermal water in the collection tank 1, driven by the pump 13, enters the heat exchange box 19 through the outlet pipe 12, filter box 15, and inlet hose 18. When the geothermal water passes through the outlet pipe 12, the coarse filter screen 14 in the outlet pipe 12 filters the geothermal water, intercepting and blocking large impurities in the collection tank. Inside the heat exchanger 1, fine mineral impurities in the geothermal water are filtered out through the fine filter screen 16 and activated carbon plate 17 in the filter box 15. The outlet pipe 12, filter box 15, and inlet hose 18 are all threadedly connected, allowing the filter box 15 to be disassembled and installed for easy cleaning and replacement of the fine filter screen 16 and activated carbon plate 17, preventing clogging and enhancing practicality. After the geothermal water is cleaned of mineral impurities, it is injected into the heat exchanger 19 through the inlet hose 18. The heating circulating water flows within the serpentine pipe 20, and the heat from the geothermal water is transferred to the heating system inside the pipe through the serpentine pipe wall. The serpentine pipe 20 design of the heating circulating water increases the heat exchange path length and contact area, improving heat exchange efficiency. The heated heating circulating water flows out of the serpentine pipe 20 and enters the heating equipment 21, efficiently extracting heat from the geothermal water and converting it into usable heating energy. After heat exchange is completed in the heat exchange box 19, the geothermal water temperature decreases, becoming "tailwater." The tailwater flows out through the drain pipe 23, and the reinjection pump 24 pressurizes the tailwater, injecting it back into the same underground thermal reservoir through the reinjection well. When the heating unit stops providing heating for maintenance, the servo motor 6 on the load plate 5 is activated. The servo motor 6 drives the first rotating wheel 7 to rotate, and the first rotating wheel 7 drives the second rotating wheel 8 to rotate via the track. At the same time, the threaded rod 9 rotates synchronously. The rotating threaded rod 9 drives the moving seat 10 to move horizontally, and at the same time drives the cleaning scraper 11 in the water collection tank 1 to reciprocate within the water collection tank 1. This allows the cleaning scraper 11 to clean the inner wall of the water collection tank 1 and the coarse filter screen 14, scraping away the mud, sand and scale adhering to the inner wall of the water collection tank 1. It also pushes large particles of impurities closer to the sealing door 4, making it easier for the staff to open the sealing door 4 to clean the impurities inside the water collection tank 1.

[0028] The working principle of this invention is as follows: First, the controller 25 starts the deep well submersible pump 3, which draws medium-deep geothermal water into the surface collection tank 1 through two pumping pipes 2. When the water level reaches the preset upper limit threshold, the controller 25 controls the deep well submersible pump 3 to stop pumping. When the water level in the collection tank 1 reaches the working water level, the controller 25 starts the pumping pump 13. Under the suction action of the pumping pump 13, the geothermal water in the collection tank 1 flows out through the outlet pipe 12. The geothermal water first passes through the coarse filter screen 14 at the inlet of the outlet pipe 12. The coarse filter screen 14 intercepts and blocks large impurities (such as sand, gravel, and large scale) in the collection tank 1. The geothermal water continues to flow into the filter box 15. Inside the filter box 15, the geothermal water passes through the fine filter screen 16 and the activated carbon plate 17 for filtration and purification. The purified geothermal water enters the heat exchange box 19 through the inlet hose 18. The heating circulating water circulates inside the serpentine pipe 20. The high temperature heat of the geothermal water is transferred through the serpentine pipe 20. The heating circulating water is transferred from the serpentine pipe wall to the heating circulating water inside the pipe. The heated heating circulating water flows out of the serpentine pipe 20 and enters the heating equipment 21 to provide heating to the user's room. After the heat exchange is completed in the heat exchange box 19, the temperature of the geothermal water decreases. The tailwater flows out through multiple drain pipes 23 on one side of the heat exchange box 19. The reinjection pump 24 pressurizes the tailwater. The pressurized tailwater is injected back into the same underground thermal reservoir through the reinjection well. When the heating unit stops heating for maintenance or according to the preset cleaning cycle, the controller 25 starts the servo motor 6 on the carrier plate 5. The servo motor 6 drives the first rotating wheel 7 to rotate. The first rotating wheel 7 drives the second rotating wheel 8 to rotate synchronously through the track. The first rotating wheel 7 and the second rotating wheel 8 drive the two parallel threaded rods 9 to rotate synchronously. They also drive the cleaning scraper 11 to move synchronously inside the water collection tank 1 to scrape off the mud and scale attached to the inner wall. At the same time, the cleaning scraper 11 pushes large particles of impurities to the sealing door 4 for centralized treatment.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A medium-deep geothermal heating unit, comprising a water collection tank (1), characterized in that: Two pumping pipes (2) are fixedly connected to one side of the outer wall of the water collection tank (1). A deep well submersible pump (3) is fixedly installed on the outer surface of the two pumping pipes (2). A sealing door (4) is fixedly connected to the front of the water collection tank (1). A carrying plate (5) is fixedly connected to the outer wall of the water collection tank (1) away from the sealing door (4). A servo motor (6) is fixedly connected to the top of the carrying plate (5). A first rotating wheel (7) is fixedly connected to the output end of the servo motor (6). A second rotating wheel (8) is rotatably connected to the outer surface of the first rotating wheel (7) via a track. A threaded rod (9) is fixedly connected to the end of the first rotating wheel (7) and the second rotating wheel (8) away from the servo motor (6). A movable seat (10) is threadedly connected to the outer surface of the threaded rod (9). The bottom of the movable seat (10) A cleaning scraper (11) is fixedly connected. A water outlet pipe (12) is fixedly connected to the outer wall of the water collection tank (1) away from the water pump pipe (2). A water pump (13) is installed on the outer surface of the water outlet pipe (12). A coarse filter screen (14) is provided at the water inlet of one end of the water outlet pipe (12), and a filter box (15) is threaded to the other end. A fine filter screen (16) and an activated carbon plate (17) are respectively provided inside the filter box (15). A water inlet hose (18) is threaded to the top of the filter box (15). A heat exchange box (19) is fixedly connected to the end of the water inlet hose (18) away from the filter box (15). A serpentine tube (20) is provided inside the heat exchange box (19). A heating device (21) is fixedly connected to the end of the serpentine tube (20) away from the heat exchange box (19).

2. The medium-deep geothermal heating unit according to claim 1, characterized in that: The top two ends of the water collection tank (1) are fixedly connected to support plates (22), and the threaded rod (9) is set between the support plates (22) and rotatably connected to the support plates (22) through bearings.

3. The medium-deep geothermal heating unit according to claim 1, characterized in that: The outer wall of the cleaning scraper (11) is provided with two vertical baffles, one end of which abuts against the left and right inner walls of the water collection tank (1).

4. A medium-deep geothermal heating unit according to claim 1, characterized in that: A support platform is fixedly connected to the upper surface of the water collection tank (1), and the heat exchange box (19) is fixedly connected to the water collection tank (1) through the support platform.

5. A medium-deep geothermal heating unit according to claim 1, characterized in that: The top of the water collection tank (1) is provided with two limiting grooves, and the bottom of the movable seat (10) extends into the water collection tank (1) through the limiting grooves and slides on the top of the water collection tank (1).

6. A medium-deep geothermal heating unit according to claim 1, characterized in that: Multiple drain pipes (23) are fixedly connected to the outer wall of the heat exchange box (19) away from the filter box (15), and a recharge pump (24) is provided on the outer surface of the multiple drain pipes (23).

7. A medium-deep geothermal heating unit according to claim 1, characterized in that: A controller (25) is fixedly connected to the outer surface of the sealing door (4). The controller (25) is electrically connected to the deep well submersible pump (3), servo motor (6), water pump (13) and reinjection pump (24).

8. A medium-deep geothermal heating unit according to claim 1, characterized in that: A liquid level sensor (26) is fixedly connected to the inner wall of the water collection tank (1), and the liquid level sensor (26) is electrically connected to the deep well submersible pump (3).

9. A medium-deep geothermal heating unit according to claim 1, characterized in that, The serpentine tube (20) extends from the heat exchange box (19) to the outside at one end away from the heat exchange box (19), and the outer wall of the serpentine tube (20) extending to the outside is covered with a heat insulation layer.

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