Efficient mining and energy conversion system for mine terrestrial heat

Abstract

The invention belongs to the field of mines, and particularly relates to a mine terrestrial heat efficient mining and energy conversion system which comprises a terrestrial heat collecting module, an energy conversion module and a control and detection module. The terrestrial heat collection module comprises a terrestrial heat well and a multi-stage user system; the energy conversion module comprises a first-stage heat exchanger, a second-stage heat exchanger, a third-stage heat exchanger, an evaporator and a condenser; the control and detection module comprises an intelligent control system and a data acquisition and analysis system. The invention has the following beneficial effects: high-efficiency energy conversion: heat in geothermal water is extracted to the greatest extent, and the energy conversion efficiency is improved; according to the collaborative mining technology, geothermal energy serves as renewable energy for collaborative development, the high-temperature problem of a mine is solved, and efficient utilization of the geothermal energy is achieved; intelligent management: introducing an intelligent control system and a data acquisition and analysis system, monitoring parameters such as temperature and pressure of geothermal resources in real time, and ensuring stable operation of the system.

Description

Technical Field

[0001] The present invention relates to the field of mines, and in particular to a mine geothermal high-efficiency mining and energy conversion system. Background Art

[0002] With the increasing global demand for clean energy and the dwindling reserves of traditional fossil fuels, geothermal energy is gaining increasing attention as a renewable, clean energy source. Deep mines, in particular, often experience heat damage due to the high temperatures deep underground. Traditional cooling methods are not only energy-intensive but also inefficient.

[0003] The invention, filed in Chinese patent application number CN202410123456.7, relates to a highly efficient geothermal energy extraction technology encompassing multiple steps, including geological exploration, drilling, wellbore construction, completion, and geothermal fluid extraction. By optimizing the technical parameters and management measures of these steps, efficient utilization of geothermal resources can be achieved. Furthermore, the technology emphasizes the importance of environmental protection and sustainable development, requiring that environmental impacts be minimized and effective pollution control measures implemented during the extraction process.

[0004] The invention, filed in Chinese patent application number CN202420654321.8, provides a study on efficient geothermal energy conversion and utilization technology, focusing on the definition and classification of geothermal energy, as well as its direct and indirect utilization methods. Through the use of equipment such as heat pumps, this technology enables efficient extraction and conversion of geothermal energy, providing new solutions for heating, cooling, power generation, and other fields.

[0005] The existing technology still has the following problems: 1. The heat conversion efficiency of extracting geothermal water is limited; 2. High temperature heat damage during coal mining; 3. Manual monitoring of geothermal resource parameters such as temperature and pressure is time-consuming and labor-intensive; 4. Long-term operating costs are high.

[0006] Therefore, in order to solve the above problems, a mine geothermal efficient mining and energy conversion system is proposed. Summary of the Invention

[0007] In order to make up for the shortcomings of the existing technology, the core innovations of the present invention are: through the design of a multi-stage heat exchanger; collaborative development of geothermal energy as a renewable energy source; and the introduction of an intelligent control system and a data acquisition and analysis system.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a mine geothermal efficient mining and energy conversion system described in the present invention includes a geothermal collection module, an energy conversion module and a control and detection module;

[0009] The geothermal collection module includes a geothermal well and a multi-level user system; the energy conversion module includes a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an evaporator and a condenser; the control and detection module includes an intelligent control system and a data acquisition and analysis system.

[0010] Preferably, the geothermal well includes a heat production well and a reinjection well, which are used to collect and reinject geothermal water or steam.

[0011] Preferably, the acquisition system of the geothermal acquisition module includes a data acquisition module, a storage module, a communication module, a server, a monitoring and early warning module and a user interface module;

[0012] The communication module is used to transmit the data information stored in the storage module to the server; the server is used to receive the data information sent by the communication module and generate a curve chart corresponding to each information and time based on the data; the monitoring and early warning module is used to perform threshold judgment on the geothermal well completion quality indicators. When the monitoring data exceeds the threshold, an early warning is triggered and an early warning report is generated and sent to the user interface module; the user interface module is used to transmit the early warning report to the display terminal for the user to view the data and monitoring results.

[0013] Preferably, the data acquisition module includes a temperature sensor, a pressure sensor and a flow sensor; the temperature sensor is used to monitor the outlet water temperature of the geothermal well; the pressure sensor is used to monitor the pressure of the geothermal well; and the flow sensor is used to measure the flow of geothermal water or steam.

[0014] Preferably, the storage module is used to store the data information collected by the data collection module, including real-time temperature, pressure and flow information data and historical temperature, pressure and flow information data.

[0015] Preferably, the first-stage heat exchanger is responsible for the initial extraction of heat from geothermal water; the second-stage heat exchanger further extracts the remaining heat to provide hot water for the first-stage users; the third-stage heat exchanger continues to extract heat to drive the evaporator to generate steam; the evaporator converts the hot water from the third-stage heat exchanger into steam for use by the condenser; the condenser condenses the steam into hot water and provides thermal energy for the second-stage users.

[0016] The first-stage heat exchanger uses a stainless steel tube bundle with high heat transfer performance as the heat exchange medium, and the shell of the first-stage heat exchanger is equipped with an insulation layer; the second-stage heat exchanger is equipped with an intelligent temperature control system, and the inner wall of the second-stage heat exchanger is coated with a special anti-corrosion coating; the third-stage heat exchanger is designed for a high-pressure environment, and the third-stage heat exchanger is installed with multiple safety valves and pressure gauges.

[0017] Preferably, the control and monitoring module includes an intelligent control system and a data acquisition and analysis system; the intelligent control system automatically adjusts the working status of each component according to the actual operating conditions; the data acquisition and analysis system collects and analyzes data from geothermal wells and heat exchangers to ensure stable operation of the system.

[0018] The present invention is beneficial in that:

[0019] 1. Efficient energy conversion: Through the design of multi-stage heat exchanger, the heat in geothermal water is extracted to the maximum extent, thus improving the energy conversion efficiency;

[0020] 2. Collaborative mining technology: In combination with the high-temperature heat damage problem in coal mining, geothermal energy is developed as a renewable energy source. This not only solves the high-temperature problem in mines, but also achieves efficient utilization of geothermal energy.

[0021] 3. Intelligent management: Introducing intelligent control systems and data acquisition and analysis systems to monitor geothermal resource parameters such as temperature and pressure in real time to ensure stable operation of the system;

[0022] 4. Environmental protection and sustainability: Effective pollution control measures are taken during the mining process to reduce the impact on the environment and achieve a win-win situation for economic benefits and environmental protection;

[0023] 5. Improved economic efficiency: The long-term operating costs are low. As the technology matures and the scale expands, the economic efficiency of geothermal energy will be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the framework structure of a mine geothermal efficient mining and energy conversion system of the present invention. DETAILED DESCRIPTION

[0026] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] Example 1

[0028] The system includes a geothermal collection module, an energy conversion module, and a control and detection module;

[0029] The geothermal collection module includes a geothermal well and a multi-level user system; the energy conversion module includes a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an evaporator and a condenser; the control and detection module includes an intelligent control system and a data acquisition and analysis system.

[0030] 1. Geothermal well structure

[0031] (1) Thermal wells:

[0032] Wellbore Design: Heat extraction wells typically use large-diameter steel pipes as wellbore materials to ensure sufficient strength and corrosion resistance. Insulation is installed inside the wellbore to reduce heat loss.

[0033] Filter: A multi-stage filter is installed at the bottom of the well to prevent mud and sand in the formation from entering the wellbore and protect subsequent equipment from damage.

[0034] Pumping system: Equipped with a high-efficiency submersible pump to lift the geothermal water to the surface. The pump selection should be determined based on the expected geothermal water flow rate and head.

[0035] (2) Recharge well:

[0036] Well location selection: The location of the recharge well should be as far away from the heat production well as possible to avoid short-circuit circulation of hot water and affect the heat production efficiency.

[0037] Water injection device: A water injection device is installed at the top of the recharge well to inject the cooled water back into the ground. This device includes a pressure regulating valve to ensure smooth water injection.

[0038] 2. Geothermal well operating parameters

[0039] (1) Temperature monitoring: The temperature changes of geothermal water are monitored in real time by temperature sensors installed at the wellhead to provide data support for system control.

[0040] (2) Flow control: Use a flow meter to accurately measure the geothermal water flow rate, and adjust the pump speed through an automatic control system to maintain the optimal operating state.

[0041] The multi-level user system is designed to maximize the use of geothermal resources, gradually extracting heat from geothermal water through multiple levels of heat exchangers to meet application scenarios with different temperature requirements.

[0042] 3. Primary heat exchanger

[0043] (1) Heat exchange medium: Stainless steel tube bundles with high heat transfer performance are used as heat exchange medium to enhance heat exchange efficiency.

[0044] (2) Insulation measures: Install an insulation layer on the heat exchanger shell to reduce heat loss.

[0045] 4. Secondary heat exchanger

[0046] (1) Intelligent control: Equipped with an intelligent temperature control system to dynamically adjust the working state of the heat exchanger according to actual needs.

[0047] (2) Anti-corrosion design: Considering that geothermal water may contain corrosive substances, the inner wall of the heat exchanger is coated with a special anti-corrosion coating.

[0048] 5.Three-stage heat exchanger

[0049] (1) High-pressure design: In order to improve the steam quality, the three-stage heat exchanger is designed for a high-pressure environment to ensure sufficient steam pressure.

[0050] (2) Safety protection: Install multiple safety valves and pressure gauges to ensure safe operation of the equipment.

[0051] Working principle:

[0052] 1. Geothermal Collection: Extracting high-temperature geothermal water or steam from deep underground through geothermal wells. The design of geothermal wells requires comprehensive consideration of geological conditions, hydrological characteristics, and economic factors.

[0053] 2. Energy conversion: The extracted geothermal water or steam first passes through the primary heat exchanger to extract the initial heat, and then the hot water is sent to the water storage tank. Subsequently, the remaining heat is further extracted through the secondary heat exchanger to provide hot water for the primary users. Finally, the tertiary heat exchanger continues to extract heat to drive the evaporator to generate steam.

[0054] 3. Steam Utilization: The steam generated by the evaporator enters the condenser, and the condensed hot water provides heat energy for secondary users. Throughout the entire process, the multi-stage heat exchanger design maximizes the extraction of heat from the geothermal water.

[0055] 4. Recharge and circulation: The cooled water is re-injected into the ground through the recharge well, forming a complete circulation system to ensure the sustainable use of geothermal resources;

[0056] 5. Intelligent Management: The intelligent control system monitors various parameters of geothermal resources in real time to ensure efficient and safe operation of the system. Through data analysis and model prediction, the mining plan is continuously optimized to improve the utilization efficiency of geothermal resources.

[0057] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A mine geothermal efficient mining and energy conversion system, characterized by: The system includes a geothermal collection module, an energy conversion module, and a control and detection module; The geothermal collection module includes a geothermal well and a multi-level user system; The energy conversion module includes a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an evaporator and a condenser; The control and detection module includes an intelligent control system and a data acquisition and analysis system.

2. The mine geothermal efficient mining and energy conversion system according to claim 1, characterized in that: The geothermal wells include heat production wells and reinjection wells, which are used to collect and reinject geothermal water or steam.

3. The mine geothermal efficient mining and energy conversion system according to claim 1, characterized in that: The acquisition system of the geothermal acquisition module includes a data acquisition module, a storage module, a communication module, a server, a monitoring and early warning module and a user interface module; The communication module is used to transmit the data information stored in the storage module to the server; the server is used to receive the data information sent by the communication module and generate a curve chart corresponding to each information and time based on the data; The monitoring and early warning module is used to determine the threshold value of the geothermal well completion quality index. When the monitoring data exceeds the threshold value, an early warning is triggered and an early warning report is generated and sent to the user interface module; The user interface module is used to transmit the early warning report to the display terminal for users to view data and monitoring results.

4. The mine geothermal efficient mining and energy conversion system according to claim 3 is characterized by: The data acquisition module includes a temperature sensor, a pressure sensor and a flow sensor; the temperature sensor is used to monitor the outlet water temperature of the geothermal well; the pressure sensor is used to monitor the pressure of the geothermal well; and the flow sensor is used to measure the flow of geothermal water or steam.

5. The mine geothermal efficient mining and energy conversion system according to claim 3 is characterized by: The storage module is used to store the data information collected by the data collection module, including real-time temperature, pressure and flow information data and historical temperature, pressure and flow information data.

6. The mine geothermal efficient mining and energy conversion system according to claim 1, characterized in that: The energy conversion module includes a primary heat exchanger, a secondary heat exchanger, a tertiary heat exchanger, an evaporator and a condenser; The first-stage heat exchanger is responsible for the initial extraction of heat from geothermal water; the second-stage heat exchanger further extracts the remaining heat to provide hot water for the first-stage users; the third-stage heat exchanger continues to extract heat to drive the evaporator to generate steam; the evaporator converts the hot water from the third-stage heat exchanger into steam for use in the condenser; the condenser condenses the steam into hot water and provides thermal energy for the second-stage users.

7. The mine geothermal efficient mining and energy conversion system according to claim 6, characterized in that: The first-stage heat exchanger uses a stainless steel tube bundle with high heat transfer performance as the heat exchange medium, and the shell of the first-stage heat exchanger is equipped with an insulation layer; the second-stage heat exchanger is equipped with an intelligent temperature control system, and the inner wall of the second-stage heat exchanger is coated with a special anti-corrosion coating; the third-stage heat exchanger is designed for a high-pressure environment, and the third-stage heat exchanger is installed with multiple safety valves and pressure gauges.

8. The mine geothermal efficient mining and energy conversion system according to claim 1 is characterized by: The control and monitoring module includes an intelligent control system and a data acquisition and analysis system; the intelligent control system automatically adjusts the working status of each component according to the actual operating conditions; the data acquisition and analysis system collects and analyzes data from geothermal wells and heat exchangers to ensure stable operation of the system.

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