A device and method for developing and utilizing low-medium temperature geothermal energy in stages

Abstract

The application relates to a medium-low temperature geothermal stepwise development and utilization device and method, and relates to the technical field of geothermal stepwise development. The medium-low temperature geothermal stepwise development and utilization device comprises a geothermal water extraction well, a distributor, a geothermal power generation system, an indoor radiator, a heating floor and a hot spring which are connected in sequence. The hot spring is connected with the geothermal water extraction well. The distributor is also separately connected with the indoor radiator, the heating floor and the hot spring. The distributor is used for regulating and controlling the direct connection of the geothermal water extraction well with any one of the geothermal power generation system, the indoor radiator, the heating floor and the hot spring. The application has the effect of improving the stability of geothermal utilization.

Description

Technical Field

[0001] This application relates to the technical field of geothermal cascade development, and in particular to a device and method for medium- and low-temperature geothermal cascade development and utilization. Background Technology

[0002] Geothermal energy is thermal energy stored inside the Earth. It is a clean, low-carbon, widely distributed, abundant, safe, and high-quality renewable energy source.

[0003] Chinese patent CN112032804A discloses a power generation and centralized heating system and method for the cascade development and utilization of medium and low temperature geothermal energy. The system includes a geothermal water extraction well, a geothermal power generation system, an indoor radiator, a heated floor, a primary geothermal heat pump, and a secondary geothermal heat pump connected in sequence. By making refined multi-stage utilization of geothermal energy, the geothermal utilization efficiency of the entire system is improved.

[0004] In the above system, geothermal water flows unidirectionally in stages. When one of the geothermal utilization links in the system fails, it can easily lead to the failure of the entire system, resulting in poor stability of geothermal utilization. Summary of the Invention

[0005] To improve the stability of geothermal utilization, this application provides a device and method for the cascade development and utilization of medium and low temperature geothermal energy.

[0006] Firstly, this application provides a medium-low temperature geothermal cascade development and utilization device, which adopts the following technical solution: A medium-low temperature geothermal cascade development and utilization device includes a geothermal water extraction well, a regulator, a geothermal power generation system, an indoor radiator, a heated floor, and a hot spring, connected in sequence. The hot spring is connected to the geothermal water extraction well, and the regulator is also individually connected to the indoor radiator, the heated floor, and the hot spring. The regulator is used to control the direct connection between the geothermal water extraction well and any one of the geothermal power generation system, the indoor radiator, the heated floor, and the hot spring.

[0007] By adopting the above technical solution, the geothermal well can supply geothermal water to the distributor. Since the distributor can be directly connected to any one of the geothermal power generation system, indoor radiators, heated floors, and hot springs, it can directly supply geothermal water to any one of these systems. Therefore, when the geothermal power generation system, indoor radiators, heated floors, and hot springs are all functioning properly, the distributor supplies geothermal water to the geothermal power generation system, ensuring the normal operation of the entire development and utilization device. When any one of the geothermal utilization links—the geothermal power generation system, indoor radiators, and heated floors—fails, the distributor can allow geothermal water to bypass the failed link and directly supply geothermal water to the next link. This makes the development and utilization device less likely to shut down due to a failure in any one of these links, thus improving the stability of geothermal utilization.

[0008] Optionally, the distributor includes a housing and a distribution component. The housing is connected to an inlet pipe and four outlet pipes. The inlet pipe is connected to the geothermal water well, and the four outlet pipes are respectively connected to the geothermal power generation system, the indoor radiator, the heated floor, and the hot spring. The distribution component is disposed inside the housing and is connected to the inlet pipe and the four outlet pipes. The distribution component is used to allow the geothermal water in the inlet pipe to flow into one of the four outlet pipes after temperature adjustment.

[0009] By adopting the above technical solution, one inlet pipe can be connected to one of the four outlet pipes through the regulating component. Under the regulating action of the regulating component, the geothermal water can flow directly through the inside of the tank to any geothermal utilization link, such as the geothermal power generation system, indoor radiators, heated floor, and hot spring, thereby making it easy for the regulator to adjust the flow direction of the geothermal water.

[0010] Optionally, the distribution assembly includes distribution blocks, cooling pipes, and a cold air blower. Four distribution blocks are provided, each corresponding to one of the outlet pipes. Each distribution block is rotatably connected to the housing and has a first through hole and a second through hole. Three cooling pipes are provided and are respectively connected between the four distribution blocks. The first through hole is used to allow geothermal water to flow into the outlet pipe, and the second through hole is used to allow geothermal water to flow into the cooling pipe. The inlet pipe is used to connect to the distribution block corresponding to the geothermal power generation system. The cold air blower is connected to the housing and is used to blow cooling air onto the three cooling pipes.

[0011] By adopting the above technical solution, in the initial state, the distribution block corresponding to the geothermal power generation system allows the geothermal water in the inlet pipe to flow into the geothermal power generation system through the first through hole and the outlet pipe. The remaining distribution blocks keep the cooling pipe in a closed state through the side wall, so that the geothermal water is supplied from the geothermal power generation system step by step along the cascade.

[0012] When a fault occurs in any of the geothermal utilization stages of the geothermal power generation system, indoor radiators, or heated floor, requiring reconfiguration, the reconfiguration block is rotated. This allows the geothermal water from the inlet pipe to flow into the cooling pipe through the second through-hole of the reconfiguration block. The reconfiguration is then performed stage by stage until the geothermal water can flow into the outlet pipe corresponding to the next stage of geothermal utilization through the first through-hole. A cooler then cools the geothermal water in the cooling pipe, ensuring that the supply temperature of the geothermal water matches the required temperature of the next stage of geothermal utilization. Thus, through the reconfiguration block and cooling pipe, the geothermal water can easily flow to any geothermal utilization stage, allowing it to easily bypass faulty geothermal utilization stages and improving the stability of geothermal utilization.

[0013] Optionally, the cooling pipe is made of an elastic material, and a support frame is fixedly connected to the inner wall of the cooling pipe. The support frame is made of shape memory alloy. When the support frame is heated, the support frame drives the side wall of the cooling pipe to expand into a spherical shape.

[0014] By adopting the above technical solution, when geothermal water is first introduced into the cooling pipe, the geothermal water heats up the support frame, and the heated support frame drives the cooling pipe to expand. The expanded cooling pipe increases the contact area with the cooling air, improving the cooling effect of the geothermal water inside the cooling pipe. After the geothermal water cools down, the support frame cools and contracts, causing the cooling pipe to return to its original shape, reducing the contact area between the cooling pipe and the cooling air, and reducing the cooling effect of the geothermal water inside the cooling pipe. Thus, by adjusting the cooling pipe through the support frame, the cooling of the geothermal water inside the cooling pipe can be carried out quickly and easily, and it is easy to maintain a stable cooling state after cooling down.

[0015] Optionally, the air cooler is electrically connected to a battery, and the battery is electrically connected to a solar panel.

[0016] By adopting the above technical solution, the solar panel absorbs the energy of sunlight to charge the battery, and the battery supplies power to the air cooler, making it easy for the air cooler to obtain electrical energy.

[0017] Optionally, the mixing block is equipped with a temperature sensor and connected to a motor. The temperature sensor is used to output the temperature signal of the geothermal water and is electrically connected to a controller. The controller is electrically connected to the motor and responds to the temperature signal. The controller is used to control the motor to allow geothermal water to flow through the first through hole or the second through hole.

[0018] By adopting the above technical solution, the initial state of the mixing block is such that the temperature sensor is directly opposite the cooling pipe. When the temperature signal measured by the temperature sensor is the set value, the controller controls the motor to drive the mixing block to rotate, so that the first or second through hole of the mixing block can flow with geothermal hot water. When the first through hole flows with geothermal hot water, the temperature of the geothermal hot water matches the required temperature of the outlet pipe. When the second through hole flows with geothermal hot water, the geothermal hot water can flow into the next cooling pipe for staged cooling. Thus, through the temperature sensor, the geothermal hot water can achieve staged cooling, and the temperature of the geothermal hot water flowing into the outlet pipe is more accurate.

[0019] Optionally, multiple partitions are fixedly installed inside the housing, and the multiple partitions form three cooling channels connected to the air cooler between the three cooling pipes. A baffle plate for limiting the flow is rotatably installed inside the cooling channel.

[0020] By adopting the above technical solution, a cooling channel is formed around the cooling pipe by the baffle, which makes it easier for the cooling air from the air cooler to blow onto the cooling pipe, thus improving the utilization efficiency of the cooling air. By rotating the baffle plate to adjust the airflow in the cooling channel, the airflow in the three cooling channels can be easily distributed. For example, in the initial state, the cooling channel where the first cooling pipe to flow into the geothermal water is located is in a fully open state, while the other cooling channels are in a fully closed state. This allows the airflow to be concentrated into the fully open cooling channel, making it easier for the first cooling pipe to flow into the geothermal water to cool down quickly.

[0021] Optionally, the mixing block located between two adjacent cooling pipes is connected to a first drive assembly. The first drive assembly includes a first gear, a first double-sided rack, and a second gear. The first gear is coaxially fixed to the mixing block. One side of the first double-sided rack meshes with the first gear and is slidably connected to the partition. The second gear is coaxially fixed to the baffle plate near the geothermal water inflow side of the mixing block. The second gear is used to mesh with the other side of the first double-sided rack.

[0022] By adopting the above technical solution, when the mixing block rotates, it can drive the first gear to rotate. The first gear drives the first double-sided rack to slide, and the first double-sided rack drives the second gear to rotate. The second gear drives the baffle plate to rotate, so that the baffle plate can limit the flow of the cooling channel simultaneously when the mixing block rotates. Thus, when the first or second through hole of the mixing block guides the flow, the baffle plate can concentrate the cooling air to the cooling pipe that starts to cool the geothermal water by limiting the flow.

[0023] Optionally, the mixing block located between two adjacent cooling pipes is connected to a second drive assembly. The second drive assembly includes a third gear, a second double-sided rack, and a fourth gear. The third gear meshes with the first gear and is rotatably connected to the partition. One side of the second double-sided rack meshes with the third gear and is slidably connected to the partition. The fourth gear is coaxially arranged with the baffle plate away from the geothermal water inflow side of the mixing block. A coil spring is provided between the fourth gear and the baffle plate. The fourth gear is used to mesh with the other side of the second double-sided rack.

[0024] By adopting the above technical solution, when the adjusting block is rotated to guide the flow through the second through hole, the adjusting block drives the third gear to rotate, the third gear drives the second double-sided rack to slide, the second double-sided rack drives the fourth gear to rotate, and the fourth gear drives the baffle plate to rotate through the coil spring, so that the cooling channel that has just flowed into the geothermal water can be opened to a fully conductive state under the drive of the adjusting block. Moreover, since the fourth gear is connected to the baffle plate through the coil spring, the baffle plate can simultaneously receive the drive of the second gear and the fourth gear.

[0025] Secondly, this application provides a method for the cascade development and utilization of medium- and low-temperature geothermal energy, employing the following technical solution: A method for the cascade development and utilization of medium- and low-temperature geothermal energy, based on the aforementioned device for the cascade development and utilization of medium- and low-temperature geothermal energy, includes the following steps: S1 Normal operation: Rotate the regulating block, and under the guiding action of the first through hole, the geothermal water in the inlet pipe flows into the outlet pipe connected to the geothermal power generation system, so that the geothermal utilization links of each stage are normal operation until one of the geothermal utilization links fails. S2 Fault Adjustment: Rotate the adjustment block, and under the guiding action of the first through hole, the second through hole and the cooling pipe, the geothermal water in the inlet pipe flows into the outlet pipe connected to the next geothermal utilization link, so that the geothermal water flows normally. S3 Temperature Adjustment: Start the air cooler, which blows cooling air onto the cooling pipe and cools the geothermal water in the cooling pipe so that the temperature of the geothermal water meets the supply temperature of the next geothermal utilization stage. S4 Stable Operation: The controller enables geothermal water to bypass the faulty geothermal utilization process and continue to be supplied, so that the development and utilization of geothermal water can proceed stably.

[0026] By adopting the above technical solution, the distributor first allows geothermal water to flow into the geothermal power generation system, enabling the entire device to operate normally. When one of the geothermal utilization links in the geothermal power generation system, indoor radiators, or heated floors fails, the distributor uses the distribution block and cooling pipe to allow the geothermal water to flow directly into the next geothermal utilization link after the failure, ensuring a continuous supply of geothermal water and making it less susceptible to the impact of development and utilization device failures, thereby improving the stability of geothermal utilization.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a mixing block and cooling pipe, the mixer can allow the geothermal water from the geothermal well to flow directly into any geothermal utilization stage, thereby improving the stability of geothermal utilization; 2. By forming a cooling channel with partitions and installing baffles inside the cooling channel to limit the flow, the cooling effect of the cooling pipes can be easily adjusted. 3. By setting up a first drive component and a second drive component, the mixing block and the wind deflector can be easily adjusted synchronously, which improves the ease of use of the development and utilization device. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a cross-sectional view of an embodiment of this application; Figure 3 This is a cross-sectional view intended to illustrate the first and second drive components on one side of the cooling channel; Figure 4 yes Figure 2 Enlarged view at point A in the middle; Figure 5 This is a cross-sectional view intended to illustrate the first and second drive components on the other side of the cooling channel; Figure 6 yes Figure 3 A magnified view of point B in the middle.

[0029] Explanation of reference numerals in the attached figures: 1. Housing; 11. Water inlet pipe; 12. Water outlet pipe; 13. Partition plate; 14. Air outlet; 2. Adjustment block; 21. First through hole; 22. Second through hole; 23. Temperature sensor; 24. Controller; 25. Motor; 3. Cooling pipe; 31. Support frame; 4. Air cooler; 41. Battery; 42. Solar panel; 5. Wind deflector; 6. First drive assembly; 61. First gear; 62. First double-sided rack; 63. Second gear; 7. Second drive assembly; 71. Third gear; 72. Second double-sided rack; 73. Fourth gear; 74. Coil spring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0031] This application discloses a medium-low temperature geothermal cascade development and utilization device. The device includes a geothermal water well, a regulator, a geothermal power generation device, an indoor radiator, a heated floor, and a hot spring, connected sequentially. The hot spring is connected to the geothermal water well. The regulator is also individually connected to the indoor radiator, the heated floor, and the hot spring. The regulator is used to control the direct connection between the geothermal water well and any one of the geothermal utilization stages: the geothermal power generation device, the indoor radiator, the heated floor, or the hot spring.

[0032] In use, the distributor connects the geothermal water well directly to the geothermal power generation unit, ensuring the normal operation of the development and utilization device. When one of the geothermal utilization links, such as the geothermal power generation unit, indoor radiators, or heated floors, fails, the distributor directs the geothermal water well to the next geothermal utilization link after the failure, making it less likely for the entire development and utilization device to stop operating due to the failure of the geothermal utilization link, thereby improving the stability of geothermal utilization.

[0033] Reference Figure 1 The distributor includes a housing 1 and a dispensing assembly. The housing 1 is rectangular and vertically arranged. An inlet pipe 11 and an outlet pipe 12 are fixedly installed on the housing 1. Both the inlet pipe 11 and the outlet pipe 12 are circular pipes. The inlet pipe 11 and the outlet pipe 12 are located on two opposite side walls of the housing 1. The inlet pipe 11 is connected to the geothermal water well. There are four outlet pipes 12, which are respectively connected to the geothermal power generation device, the indoor radiator, the heated floor and the hot spring.

[0034] Reference Figure 2 The mixing components include mixing blocks 2, cooling pipes 3 and air coolers 4. There are four mixing blocks 2, which correspond one-to-one with the water outlet pipes 12. The mixing blocks 2 are located at one end of the water outlet pipes 12 inside the housing 1. The mixing blocks 2 are cylindrical and rotatably connected to the housing 1. The rotation axis of the mixing blocks 2 is set horizontally and perpendicular to the axis of the water inlet pipe 11.

[0035] Reference Figure 3 The mixing block 2 is connected to a motor 25, which is fixedly connected to the housing 1, and its output shaft is coaxially fixedly connected to the mixing block 2.

[0036] Reference Figure 2There are three cooling pipes 3, which are respectively connected between four distribution blocks 2. The cooling pipes 3 are made of elastic material and are circular tubes. They are supported by a support frame 31 inside. The support frame 31 is adapted to the cooling pipes 3 and is fixed to them. The support frame 31 is made of shape memory alloy. When the support frame 31 is heated, it drives the side wall of the cooling pipe 3 to expand into a spherical shape.

[0037] Reference Figure 4 The mixing block 2 has a through hole 21 and a through hole 22 on its side wall. The first through hole 21 and the second through hole 22 are located on both sides of the rotation axis of the mixing block 2. The first through hole 21 is straight and the second through hole 22 is bent at 90° and is in the shape of a broken line. When the mixing block 2 rotates 90°, one end of the second through hole 22 is located at the original position of one end of the first through hole 21.

[0038] Reference Figure 2 In accordance with the hierarchical order of geothermal power generation device, indoor radiator, heated floor and hot spring, the four distribution blocks 2 correspond to the geothermal power generation device, indoor radiator, heated floor and hot spring in sequence, and the three cooling pipes 3 and the four water outlet pipes 12 are also arranged in sequence along the order of the four distribution blocks 2.

[0039] Reference Figure 2 and Figure 4 The first through hole 21 of the first mixing block 2 is used to connect the water inlet pipe 11 and the first water outlet pipe 12, and the second through hole 22 is used to connect the water inlet pipe 11 and the first cooling pipe 3; the first through hole 21 of the second mixing block 2 is used to connect the first cooling pipe 3 and the second water outlet pipe 12, and the second through hole 22 is used to connect the first cooling pipe 3 and the second cooling pipe 3; the first through hole 21 of the third mixing block 2 is used to connect the second cooling pipe 3 and the third water outlet pipe 12, and the second through hole 22 is used to connect the second cooling pipe 3 and the third cooling pipe 3; the first through hole 21 of the fourth mixing block 2 is used to connect the third cooling pipe 3 and the fourth water outlet pipe 12, and the second through hole 22 is in a disabled state.

[0040] Temperature sensor 23 is embedded in the mixing block 2. Temperature sensor 23 is located on the side of the first through hole 21 away from the second through hole 22. Temperature sensor 23 is flush with the side wall of mixing block 2. Temperature sensor 23 is used to output the temperature signal of geothermal water. Except for the temperature sensor 23 on the first mixing block 2, the temperature sensors 23 on the other mixing blocks 2 are all facing the cooling pipe 3 in the initial state.

[0041] Reference Figure 3 and Figure 4Temperature sensor 23 is electrically connected to controller 24. Controller 24 is fixed to the top of housing 1 and electrically connected to motor 25. Controller 24 responds to the temperature signal output by temperature sensor 23 and is used to control motor 25 to drive regulating block 2 to allow geothermal water to flow through first through hole 21 or second through hole 22.

[0042] Reference Figure 1 and Figure 2 The air cooler 4 is located on the side of the housing 1 near the water inlet pipe 11 and is connected to the housing 1. The air cooler 4 is used to blow cooling air onto the cooling pipe 3. The air cooler 4 is electrically connected to a battery 41, which is fixedly connected to the housing 1. The battery 41 is electrically connected to a solar panel 42, which is tilted and fixedly connected to the top of the housing 1.

[0043] In use, the first regulating block 2 allows the geothermal water in the inlet pipe 11 to flow into the geothermal power generation system through the first through hole 21 and the first outlet pipe 12. The geothermal water then flows sequentially from the geothermal power generation system through the indoor radiators, heated floors, and hot springs, ensuring the normal operation of the development and utilization device. When any of the geothermal utilization links—the geothermal power generation system, the indoor radiators, or the heated floors—fails, the motor 25 corresponding to the first regulating block 2 is activated. The motor 25 drives the first regulating block 2 to rotate, and the geothermal water in the inlet pipe 11 flows into the first cooling pipe 3 through the second through hole 22. The supporting frame 31 is heated and expands the cooling pipe 3, activating the air cooler 4, which blows cooling air onto the surface. The geothermal water in the cooling pipe 3 is cooled by the temperature sensor 23 on the second distribution block 2. The temperature sensor 23 on the second distribution block 2 measures the temperature of the geothermal water in the first cooling pipe 3. When the temperature signal of the geothermal water in the first cooling pipe 3 meets the required temperature for the radiator to flow into the room, the controller 24 controls the motor 25 corresponding to the second distribution block 2 to drive the second distribution block 2 to rotate, so that the geothermal water in the first cooling pipe 3 continues to flow in the box 1 through the second distribution block 2. The above process is repeated until the geothermal water flows into the next geothermal utilization stage of the faulty geothermal utilization stage, so that the geothermal water can skip the faulty geothermal utilization stage through the distribution block 2 and the cooling pipe 3, thereby improving the stability of geothermal utilization.

[0044] The mixer described in this application is not applicable in situations where the last hot spring in the cascade malfunctions.

[0045] Reference Figure 2 The housing 1 has multiple partitions 13 fixedly connected inside. These partitions 13 surround the three cooling pipes 3 to form three cooling channels, all of which are connected to the air cooler 4. The cooling channels are rectangular. On the side of the housing 1 away from the air cooler 4, multiple circular air outlets 14 are provided. These air outlets 14 are located opposite the three cooling channels and the side wall of the housing 1, and they penetrate the wall thickness of the housing 1.

[0046] Each of the three cooling channels is equipped with a baffle plate 5. The baffle plate 5 is rectangular and its cross-section is adapted to the airflow direction of the cooling channel. The middle of both sides of the baffle plate 5 is rotatably connected to the partition plate 13, and the rotation axis is parallel to the rotation axis of the adjusting block 2. The baffle plate 5 is used to limit the flow of the cooling channel. In the initial state, the baffle plate 5 corresponding to the first cooling pipe 3 is in a horizontal state, and the remaining baffle plates 5 are in a vertical state.

[0047] Reference Figure 3 and Figure 5 The second and third mixing blocks 2 are both connected to the first drive assembly 6 and the second drive assembly 7. The first drive assembly 6 and the second drive assembly 7 are located on the same side of the mixing block 2. The first drive assembly 6 and the second drive assembly 7 of the second mixing block 2 and the first drive assembly 6 and the second drive assembly 7 of the third mixing block 2 are located on both sides of the cooling channel, respectively.

[0048] Reference Figure 2 and Figure 3 The first drive assembly 6 includes a first gear 61, a first double-sided rack 62, and a second gear 63. The first gear 61 is coaxially fixed to the adjusting block 2. The first double-sided rack 62 is located above the first gear 61 and is horizontally arranged. One side of the first double-sided rack 62 meshes with the first gear 61 and is slidably connected to the partition 13. The sliding direction of the first double-sided rack 62 is parallel to the airflow direction in the cooling air duct. The second gear 63 is coaxially fixed to the baffle 5 near the geothermal water inflow side of the adjusting block 2. The second gear 63 is used to mesh with the other side of the first double-sided rack 62.

[0049] The second drive assembly 7 includes a third gear 71, a second double-sided rack 72, and a fourth gear 73. The third gear 71 is rotatably connected to the partition 13 and is located below the first gear 61. The third gear 71 meshes with the first gear 61. The second double-sided rack 72 is located below the third gear 71 and is horizontally arranged. One side of the second double-sided rack 72 meshes with the third gear 71 and is slidably connected to the partition 13. The sliding direction of the second double-sided rack 72 is parallel to the sliding direction of the first double-sided rack 62. The fourth gear 73 is coaxially arranged with the baffle 5 away from the geothermal water inflow side of the mixing block 2. The fourth gear 73 is used to mesh with the other side of the second double-sided rack 72.

[0050] Reference Figure 2 , Figure 3 and Figure 6 The transmission ratio between the first double-sided rack 62 and the second gear 63 is greater than the transmission ratio between the second double-sided rack 72 and the fourth gear 73. A coil spring 74 is fixedly connected between the fourth gear 73 and the wind deflector 5.

[0051] In use, after the geothermal water flows into the first cooling pipe 3, the cooling air is concentrated on the first cooling pipe 3 under the action of the baffle plate 5, so that the geothermal water in the first cooling pipe 3 is cooled quickly; after the geothermal water is cooled, the motor 25 drives the second regulating block 2 to rotate, and the geothermal water flows into the second outlet pipe 12 or into the second cooling pipe 3.

[0052] When the local hot water flows into the second outlet pipe 12, the second regulating block 2 drives the first gear 61 to rotate. The first gear 61 drives the first double-sided rack 62 to slide. The first double-sided rack 62 drives the second gear 63 to rotate. The second gear 63 drives the baffle plate 5 to rotate. The baffle plate 5 reduces the airflow in the cooling channel, so that the first cooling pipe 3 can stably cool the local hot water.

[0053] When geothermal water flows into the second cooling pipe 3, the second regulating block 2 continues to drive the first gear 61 to rotate, increasing the flow restriction effect of the baffle plate 5 on the cooling channel. At the same time, the first gear 61 drives the third gear 71 to rotate, the third gear 71 drives the second double-sided rack 72 to slide, the second double-sided rack 72 drives the fourth gear 73 to rotate, and the fourth gear 73 drives the baffle plate 5 to rotate through the coil spring 74, so that the baffle plate 5 corresponding to the cooling channel of the second cooling pipe 3 rotates to a horizontal state, so that the cooling air is concentrated and blown to the second cooling pipe 3. Thus, the above process is repeated. In the process of geothermal water flowing into the next geothermal utilization stage of the faulty geothermal utilization stage, the airflow in the cooling channel can be easily adjusted with the rotation of the regulating block 2.

[0054] The implementation principle of the medium-low temperature geothermal cascade development and utilization device in this application embodiment is as follows: During use, the first distribution block 2 allows geothermal water to flow into the geothermal power generation device through the first through hole 21, and then flows sequentially from the geothermal power generation device through the indoor radiator, the heated floor and the hot spring, so that the geothermal energy can be utilized normally through the development and utilization device; when one of the geothermal utilization links in the geothermal power generation device, the indoor radiator and the heated floor fails, the distribution block 2 is driven to rotate by the motor 25. The distribution block 2 cooperates with the cooling pipe 3 to allow the geothermal water to flow into the next geothermal utilization link after the failure. The cold air fan 4 is started, and the distribution block 2 regulates the airflow of the cold air channel through the first drive component 6 and the second drive component 7, so that the geothermal water is cooled to the temperature required for the next geothermal utilization link in a cascade sequence, so that the geothermal water can skip the failure geothermal utilization link, thereby improving the stability of geothermal utilization.

[0055] This application also discloses a method for the cascade development and utilization of medium- and low-temperature geothermal energy, based on the aforementioned device for the cascade development and utilization of medium- and low-temperature geothermal energy, comprising the following steps: S1 Normal Operation: Start motor 25, motor 25 drives the first regulating block 2 to rotate, so that the first through hole 21 of the first regulating block 2 is connected to the inlet pipe 11 and the first outlet pipe 12 respectively, so that the geothermal water in the inlet pipe 11 flows into the outlet pipe 12 connected to the geothermal power generation system, so that the geothermal utilization links of each stage are normal, until one of the geothermal utilization links of the geothermal power generation device, indoor radiator and heated floor fails; S2 Fault Adjustment: Based on the location of the faulty geothermal utilization link, start motor 25. Motor 25 drives the adjustment block 2 to rotate. Under the guiding action of the first through hole 21, the second through hole 22 and the cooling pipe 3, the geothermal water in the inlet pipe 11 flows into the outlet pipe 12 connected to the next geothermal utilization link, so that the geothermal water flows normally. S3 Temperature Adjustment: Start the air cooler 4. After adjusting the baffle plate 5 in the adjustment block 2, the air cooler 4 blows cooling air onto the cooling pipe 3 according to the cooling requirements of the cooling pipe 3, and cools down the geothermal water in the cooling pipe 3 so that the temperature of the geothermal water meets the water supply temperature of the next geothermal utilization stage. S4 Stable Operation: Through the regulator, geothermal water is continuously supplied, bypassing the faulty geothermal utilization process, so that the development and utilization of geothermal water can proceed stably.

[0056] When in use, if any of the geothermal utilization links in the geothermal power generation device, indoor radiator, or heated floor radiator fails, the distributor can cool the geothermal water and allow it to flow into the next geothermal utilization link by rotating the distribution block 2 and starting the air cooler 4. This allows the geothermal water to skip the failed geothermal utilization link during development and utilization, making it less likely for the entire geothermal water to shut down due to the failure of a single geothermal utilization link, thereby improving the stability of geothermal utilization.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A medium-low temperature geothermal cascade development and utilization device, characterized in that, The system includes a geothermal water well, a regulator, a geothermal power generation system, an indoor radiator, a heated floor, and a hot spring, all connected in sequence. The hot spring is connected to the geothermal water well. The regulator is also individually connected to the indoor radiator, the heated floor, and the hot spring. The regulator is used to control the direct connection between the geothermal water well and any one of the following: the geothermal power generation system, the indoor radiator, the heated floor, and the hot spring. The regulator includes a housing (1) and a regulating component. The housing (1) is connected to an inlet pipe (11) and four outlet pipes (12). The inlet pipe (11) is connected to the geothermal well. The four outlet pipes (12) are respectively connected to the geothermal power generation system, the indoor radiator, the heated floor and the hot spring. The regulating component is located inside the housing (1) and is connected to the inlet pipe (11) and the four outlet pipes (12). The regulating component is used to allow the geothermal water in the inlet pipe (11) to flow into one of the four outlet pipes (12) after temperature regulation. The distribution assembly includes a distribution block (2), a cooling pipe (3), and a cold air blower (4). There are four distribution blocks (2), each corresponding to a water outlet pipe (12). The distribution block (2) is rotatably connected to the housing (1) and has a first through hole (21) and a second through hole (22). There are three cooling pipes (3), each connected between the four distribution blocks (2). The first through hole (21) is used to allow geothermal water to flow into the water outlet pipe (12), and the second through hole (22) is used to allow geothermal water to flow into the cooling pipe (3). The water inlet pipe (11) is used to connect to the distribution block (2) corresponding to the geothermal power generation system. The cold air blower (4) is connected to the housing (1) and is used to blow cooling air onto the three cooling pipes (3).

2. The medium-low temperature geothermal cascade development and utilization device according to claim 1, characterized in that, The cooling pipe (3) is made of elastic material. A support frame (31) is fixedly connected to the inner side wall of the cooling pipe (3). The support frame (31) is made of shape memory alloy. When the support frame (31) is heated, the support frame (31) drives the side wall of the cooling pipe (3) to expand into a spherical shape.

3. The medium-low temperature geothermal cascade development and utilization device according to claim 1, characterized in that, The air cooler (4) is electrically connected to a battery (41), and the battery (41) is electrically connected to a solar panel (42).

4. The medium-low temperature geothermal cascade development and utilization device according to claim 1, characterized in that, The mixing block (2) is equipped with a temperature sensor (23) and connected to a motor (25). The temperature sensor (23) is used to output the temperature signal of the geothermal water and is electrically connected to a controller (24). The controller (24) is electrically connected to the motor (25). The controller (24) responds to the temperature signal and is used to control the motor (25) to allow geothermal water to flow through the first through hole (21) or to allow geothermal water to flow through the second through hole (22).

5. A medium-low temperature geothermal cascade development and utilization device according to claim 1, characterized in that, Multiple partitions (13) are fixedly installed inside the housing (1). The multiple partitions (13) form three cooling channels that are connected to the air cooler (4) between the three cooling pipes (3). A baffle plate (5) for limiting the flow is rotatably installed inside the cooling channel.

6. A medium-low temperature geothermal cascade development and utilization device according to claim 5, characterized in that, The mixing block (2) located between two adjacent cooling pipes (3) is connected to a first drive assembly (6). The first drive assembly (6) includes a first gear (61), a first double-sided rack (62), and a second gear (63). The first gear (61) is coaxially fixed to the mixing block (2). One side of the first double-sided rack (62) meshes with the first gear (61) and is slidably connected to the partition plate (13). The second gear (63) is coaxially fixed to the baffle plate (5) near the geothermal water inflow side of the mixing block (2). The second gear (63) is used to mesh with the other side of the first double-sided rack (62).

7. A medium-low temperature geothermal cascade development and utilization device according to claim 6, characterized in that, The mixing block (2) located between two adjacent cooling pipes (3) is connected to a second drive assembly (7). The second drive assembly (7) includes a third gear (71), a second double-sided rack (72), and a fourth gear (73). The third gear (71) meshes with the first gear (61) and is rotatably connected to the partition plate (13). One side of the second double-sided rack (72) meshes with the third gear (71) and is slidably connected to the partition plate (13). The fourth gear (73) is coaxially arranged with the baffle plate (5) away from the geothermal water inflow side of the mixing block (2). A coil spring (74) is provided between the fourth gear (73) and the baffle plate (5). The fourth gear (73) is used to mesh with the other side of the second double-sided rack (72).

8. A method for the cascade development and utilization of medium- and low-temperature geothermal energy, characterized in that, A medium-low temperature geothermal cascade development and utilization device according to any one of claims 1-7 includes the following steps: S1 Normal operation: Rotate the regulating block (2), and under the guiding action of the first through hole (21), the geothermal water in the inlet pipe (11) flows into the outlet pipe (12) connected to the geothermal power generation system, so that the geothermal utilization links of each stage are normal, until one of the geothermal utilization links fails. S2 fault adjustment: Rotate the adjustment block (2), and under the guiding action of the first through hole (21), the second through hole (22) and the cooling pipe (3), the geothermal water in the inlet pipe (11) flows into the outlet pipe (12) connected to the next geothermal utilization link, so that the geothermal water flows normally. S3 Temperature Adjustment: Start the air cooler (4), the air cooler (4) blows cooling air onto the cooling pipe (3) and cools the geothermal water in the cooling pipe (3) so that the temperature of the geothermal water meets the water supply temperature of the next geothermal utilization stage; S4 Stable Operation: The controller enables geothermal water to bypass the faulty geothermal utilization process and continue to be supplied, so that the development and utilization of geothermal water can proceed stably.

Images