Intelligent temperature control type geothermal well heat supply circulation and recharge energy-saving device

Abstract

This utility model discloses an intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device, including a circulation module installed at the outlet of the geothermal well. A heat-using device is connected to the circulation module for heating the device. A drainage module is installed on one side of the circulation module. Both the circulation module and the drainage module are connected to a control module for simultaneously discharging low-temperature water from the circulation module and introducing new hot water. This utility model has a reasonable design structure. By setting up a circulation pipeline on the geothermal well, and sequentially installing a hot water pump, a first control valve, a second control valve, a drainage module, and a monitoring module at corresponding positions on the circulation pipeline, the device monitors the geothermal water in real time, promptly discharging low-temperature geothermal water and simultaneously introducing new geothermal water. This solves the problem in existing heating systems where geothermal water continuously circulates regardless of temperature, making it difficult to discharge low-temperature water in time, thus failing to meet heating needs, and causing energy waste due to repeated circulation.

Description

Technical Field

[0001] This utility model relates to the field of geothermal energy utilization technology, specifically to an intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device. Background Technology

[0002] Geothermal energy, as a clean and renewable thermal energy resource, is widely used in the field of building heating. The main methods include directly using medium- and low-temperature geothermal water for heating / domestic hot water supply, and using ground source heat pump systems to extract shallow geothermal energy for efficient heating.

[0003] In the Chinese utility model patent with publication number CN209944466U, entitled "Single-well Circulation Second Heating System", the outlet of the dry hot well is connected to the inlet of the heat source circulation pump. The water flows through the pipe to the heat user to provide heating. After the heating is finished, the water flows back into the dry hot well, and so on. However, the geothermal water continues to circulate in the repeated cycle, regardless of its temperature, which makes it impossible to discharge the low-temperature water in time. As a result, when the low-temperature water participates in the heating, it is difficult to meet the heating demand, and the repeated circulation causes energy waste. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A smart temperature-controlled geothermal well heating circulation and reinjection energy-saving device includes a circulation module installed at the outlet of the geothermal well, the circulation module and the heat-using equipment, used to supply heat to the heat-using equipment;

[0007] A drainage module is installed on one side of the circulation module. Both the circulation module and the drainage module are connected to the control module and are used to simultaneously discharge the low-temperature water in the circulation module and introduce new hot water.

[0008] The circulation module includes a first pipeline, one end of which is connected to a geothermal well, and the other end of which is connected to a second pipeline. The other end of the second pipeline is connected to a heat-using device. The heat-using device is connected to a drainage module through a fourth pipeline. The fourth pipeline is also connected to the first pipeline through a third pipeline, forming a circulation pipeline that passes through the heat-using device.

[0009] The circulation pipeline is also equipped with a hot water pump, a monitoring module, and a first control valve. The monitoring module is used to monitor the temperature of the geothermal water discharged from the heat-using equipment. The circulation pipeline is connected to the drainage module through a second control valve. The hot water pump, monitoring module, first control valve, and second control valve are all electrically connected to the control module to discharge low-temperature water and simultaneously introduce new geothermal water.

[0010] Furthermore, the drainage module includes a drainage pipe, one end of which is connected to a second control valve, and the other end of which is connected to several reinjection wells for reinjecting low-temperature water.

[0011] Furthermore, the monitoring module includes a first temperature sensor, which is installed on the fourth pipeline to detect the temperature of the geothermal water after passing through the heat-using equipment.

[0012] Furthermore, both the first and second control valves are electrically operated drain valves.

[0013] Furthermore, the control module is equipped with a controller, which is electrically connected to the first temperature sensor, the hot water pump, and the drain valve.

[0014] Furthermore, a second temperature sensor is also installed on the second pipeline to detect the temperature of the geothermal water before it enters the heat-using equipment;

[0015] Flow sensors are installed on the second pipeline, the third pipeline, and the drainage pipeline to detect the flow rate in the second pipeline, the third pipeline, and the drainage pipeline.

[0016] The second temperature sensor and flow sensor are both electrically connected to the control module.

[0017] Compared with existing technologies, this intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device has the following beneficial effects:

[0018] I. This utility model involves setting up a circulation pipeline on a geothermal well and connecting it to the heat-using equipment. The geothermal water from the well is extracted and circulated to heat the equipment. Simultaneously, a hot water pump, a first control valve, a second control valve, a drainage module, and a monitoring module are sequentially installed at corresponding positions on the circulation pipeline. The control module is connected to the corresponding structure to monitor the circulating geothermal water in real time, promptly discharging low-temperature geothermal water and simultaneously introducing new geothermal water. This solves the problem in existing heating systems where geothermal water continuously circulates regardless of temperature, making it difficult to discharge low-temperature water in a timely manner, thus failing to meet heating demands, and causing energy waste due to repeated circulation.

[0019] Second, this utility model installs a first temperature sensor on the fourth pipe at the outlet of the heat-using equipment to accurately monitor the temperature of the geothermal water in the fourth pipe. At the same time, the fourth pipe is connected to the drainage pipe through a second control valve to promptly identify the temperature of the geothermal water in the fourth pipe and discharge the low-temperature water in a timely manner, avoiding energy waste caused by ineffective circulation of low-temperature water, improving the utilization efficiency of geothermal energy, and reducing the energy consumption of the heating system. In addition, a reinjection well is connected to one end of the drainage pipe to realize the sustainable utilization of geothermal resources, which meets the requirements of green environmental protection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0021] In the diagram: 1. Geothermal well; 2. First pipeline; 3. Hot water pump; 4. Second pipeline; 5. Heat-using equipment; 6. First temperature sensor; 7. First control valve; 8. Third pipeline; 9. Second control valve; 10. Drainage pipeline; 11. Recharge well; 12. Control module; 13. Fourth pipeline. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] like Figure 1 As shown, this utility model provides a technical solution: an intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device, including a circulation module installed at the outlet of the geothermal well 1, the circulation module and the heat-using equipment 5, used to supply heat to the heat-using equipment 5; a drainage module is provided on one side of the circulation module, and both the circulation module and the drainage module are connected to the control module 12, used to discharge the low-temperature water in the circulation module and simultaneously introduce new hot water; the circulation module includes a first pipe 2, one end of the first pipe 2 is connected to the geothermal well 1, the other end of the first pipe 2 is connected to a second pipe 4, and the other end of the second pipe 4 is connected to the heat-using equipment 5. The heating device 5 is connected to the drainage module through the fourth pipe 13. The fourth pipe 13 is also connected to the first pipe 2 through the third pipe 8, forming a circulation pipe through the heating device 5. The circulation pipe is also equipped with a hot water pump 3, a monitoring module and a first control valve 7. The monitoring module is used to monitor the temperature of the geothermal water discharged by the heating device 5. The circulation pipe is connected to the drainage module through the second control valve 9. The hot water pump 3, the monitoring module, the first control valve 7 and the second control valve 9 are all electrically connected to the control module 12 so that low-temperature water is discharged and new geothermal water is introduced simultaneously.

[0024] In use, one end of the bottom of the first pipe 2 is sealed to the outlet of the geothermal well 1, while the other end is fixedly connected to the second pipe 4. The hot water pump 3 is installed on the second pipe 4 in the existing manner. The hot water pump 3 on the second pipe 4 draws geothermal water from the geothermal well 1 into the first pipe 2. After passing through the first pipe 2 and the second pipe 4, it enters the heating equipment 5, such as radiators or underfloor heating pipes. After passing through the heating equipment 5, it enters the fourth pipe 13 to heat the heating equipment 5. The monitoring module detects the temperature of the outflowing geothermal water. When the temperature still meets the heating requirements, the second control valve 9 remains closed, and the first control valve 7 opens, allowing water to flow in. The water flows into the third pipe 8, then back into the first pipe 2, and passes through the heat-using equipment 5 again. This process repeats. When the geothermal water temperature is detected to be low, the second control valve 9 is opened appropriately and the opening degree of the first control valve 7 is closed appropriately to discharge the low-temperature water into the drainage module and release it. At the same time, the speed of the hot water supply pump 3 is increased, so that new geothermal water is pumped into one end of the bottom of the first pipe 2 and replenished synchronously. When the temperature is detected to meet the heating temperature, the second control valve 9 is closed again and the opening degree of the first control valve 7 is restored, as well as the speed of the hot water supply pump 3 is restored, so that the geothermal water flows back and forth in the circulation pipe, avoiding energy waste caused by ineffective circulation of low-temperature water.

[0025] The drainage module includes a drainage pipe 10, one end of which is connected to a second control valve 9, and the other end of which is connected to several reinjection wells 11 for reinjecting low-temperature water. In use, the connection between the drainage pipe 10 and the fourth pipe 13 is opened or closed by the second control valve 9 so that the low-temperature water can be discharged into the drainage pipe 10 through the second control valve 9 and then enter the reinjection wells 11. The reinjection design realizes the sustainable use of geothermal resources, meets green and environmental protection requirements, and avoids environmental pollution.

[0026] The monitoring module includes a first temperature sensor 6, which is installed on the fourth pipeline 13 to detect the temperature of the geothermal water after passing through the heat-using equipment 5. Both the first control valve 7 and the second control valve 9 are electric drain valves. The control module 12 contains a controller electrically connected to the first temperature sensor 6, the hot water pump 3, and the drain valves. In use, the controller is a programmable logic controller (PLC) with a built-in preset temperature threshold parameter. When the water temperature data transmitted by the first temperature sensor 6 is greater than or equal to the preset value, the control module 12 maintains the second control valve 9 in the closed state, while simultaneously opening the first control valve 7 and controlling the hot water pump 3 to continue operating, allowing the geothermal water to circulate and provide heat in the circulation pipeline. When the water temperature data is less than the preset value, the control module 12 triggers the second control valve 9 to open, and simultaneously sends an acceleration signal to the hot water pump 3 to extract new hot water from the geothermal well 1 to replenish the heating system. This achieves synchronous control of low-temperature water discharge and rapid replenishment of new hot water. Furthermore, based on the actual heating demand of the heat-using equipment 5 and changes in water temperature, the hot water extraction rate is dynamically adjusted to ensure the heating system is always in a highly efficient operating state, improving the user's heating experience.

[0027] A second temperature sensor is also installed on the second pipe 4 to detect the temperature of the geothermal water before it enters the heating equipment 5; flow sensors are installed on the second pipe 4, the third pipe 8, and the drainage pipe 10 to detect the flow rate within the second pipe 4, the third pipe 8, and the drainage pipe 10; the second temperature sensor and the flow sensor are electrically connected to the control module 12; the control module 12 also includes an operating interface, which detects the temperature of the geothermal water before it enters the heating equipment 5 using the second temperature sensor, and then detects the temperature of the geothermal water after use using the first temperature sensor 6, so that the staff can set the temperature threshold (such as 45℃) according to the actual heating demand. At the same time, the flow sensor detects the flow rate before and after the diversion through the drainage pipe, and configures the speed-up parameters of the hot water pump 3 under low temperature conditions (such as 120% of the rated power).

[0028] After the device is started, hot water from geothermal well 1 is drawn into the heating cycle by hot water pump 3. The water temperature is monitored in real time by the first temperature sensor 6. When the water temperature is ≥45℃, the intelligent control module 12 keeps the second control valve 9 closed and the hot water pump 3 running normally, and the geothermal water continues to circulate for heating. When the water temperature is <45℃, the control module 12 immediately opens the second control valve 9 to discharge the low-temperature water, and at the same time increases the speed of the hot water pump 3 to quickly draw new hot water to replenish the system until the water temperature rises above the threshold and the normal operation mode is restored. The modules are installed in the existing way. For example, electric valves and temperature sensors all adopt standardized interface design, which facilitates later inspection and replacement and reduces maintenance costs.

Claims

1. An intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device, comprising a circulation module installed at the outlet of a geothermal well (1), wherein the circulation module and the heat-using equipment (5) are used to supply heat to the heat-using equipment (5); Its features are, A drainage module is provided on one side of the circulation module. Both the circulation module and the drainage module are connected to the control module (12) and are used to simultaneously introduce new hot water into the circulation module by discharging the low-temperature water in the circulation module. The circulation module includes a first pipeline (2), one end of which is connected to the geothermal well (1), and the other end of the first pipeline (2) is connected to a second pipeline (4). The other end of the second pipeline (4) is connected to the heat-using equipment (5). The heat-using equipment (5) is connected to the drainage module through a fourth pipeline (13). The fourth pipeline (13) is also connected to the first pipeline (2) through a third pipeline (8), forming a circulation pipeline that passes through the heat-using equipment (5). The circulation pipeline is also equipped with a hot water pump (3), a monitoring module and a first control valve (7). The monitoring module is used to monitor the temperature of the geothermal water discharged by the heating equipment (5). The circulation pipeline is connected to the drainage module through a second control valve (9). The hot water pump (3), the monitoring module, the first control valve (7) and the second control valve (9) are all electrically connected to the control module (12) so that low-temperature water is discharged and new geothermal water is introduced simultaneously.

2. The intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device according to claim 1, characterized in that: The drainage module includes a drainage pipe (10), one end of which is connected to a second control valve (9), and the other end of which is connected to several recharge wells (11) for recharging low-temperature water.

3. The intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device according to claim 1, characterized in that: The monitoring module includes a first temperature sensor (6), which is installed on the fourth pipeline (13) and is used to detect the temperature of the geothermal water after passing through the heat-using equipment (5).

4. The intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device according to claim 1, characterized in that: Both the first control valve (7) and the second control valve (9) are electric drain valves.

5. The intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device according to claim 3, characterized in that: The control module (12) is equipped with a controller, which is electrically connected to the first temperature sensor (6), the hot water pump (3), and the drain valve.

6. The intelligent temperature-controlled geothermal well heating circulation and reinjection energy-saving device according to claim 1, characterized in that: A second temperature sensor is also installed on the second pipeline (4) to detect the temperature of the geothermal water before it enters the heat-using equipment (5); Flow sensors are installed on the second pipeline (4), the third pipeline (8) and the drainage pipeline (10) to detect the flow rate in the second pipeline (4), the third pipeline (8) and the drainage pipeline (10); The second temperature sensor and flow sensor are both electrically connected to the control module (12).

Images