Loaded coal rock micro-current extraction and energy storage system

Abstract

The invention provides a loaded coal rock micro-current extraction and energy storage system, and belongs to the technical field of underground resource and new energy development and utilization. According to the system, a micro-current signal generated when a coal and rock mass is loaded is collected in real time through a current collection module, the signal is amplified and conditioned through a signal conditioning module, and then the micro-current signal is boosted through a boost conversion module to reach the voltage level required by an energy storage module; and finally, the electric signal after voltage boosting is stored in the energy storage module. The natural characteristics of the micro-current in the loaded coal and rock mass are fully utilized, the blank of the loaded coal and rock micro-current development and utilization technology is filled up, obvious renewability and environment friendliness are achieved, the low-carbon and environment-friendly sustainable development concept is embodied, the wide application potential is achieved, and the dual-carbon target can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of underground resource and new energy development and utilization, and specifically relates to a loaded coal rock micro-current extraction and energy storage system. Background Art

[0002] As the ecological environment becomes increasingly severe, the concept of green and environmental protection has become a consensus around the world. The proposal of the "dual carbon" goal (carbon peak and carbon neutrality) is a major strategic decision made under this background. It is an important part of ecological civilization construction and will promote the comprehensive green transformation of economic and social development. In order to achieve this goal, it is imperative to realize the diversification, cleanliness and low-carbonization of energy supply, and the development and utilization of new energy will enter a period of rapid development.

[0003] Previous studies have shown that coal and rock materials can generate weak current signals during the process of load deformation, which is called "coal and rock microcurrent". The research on coal and rock microcurrent in the prior art mainly focuses on studying the microcurrent effect and response law of the loaded coal body damage process, the evolution law of coal body damage based on the microcurrent effect and the energy conversion relationship, and the mechanism and model of coal body damage microcurrent generation. For example, a microcurrent testing system and method for coal and rock under concentrated stress disclosed in Chinese patent CN202111436767.5 is mainly to simulate the current response law of the concentrated stress change process of the coal body in front of the mining working face, and provide technical support for studying the mechanical characteristics and current change laws of the coal and rock load damage process. Up to now, few studies have proposed to further develop and utilize coal and rock microcurrents.

[0004] Since the coal-rock microcurrent originates from the load environment of the underground coal-rock mass, it is naturally sourced, has abundant reserves, and is renewable. In addition, the extraction process of the coal-rock microcurrent does not involve the combustion process or the emission of harmful substances, which reflects its low carbon nature and environmental friendliness. Therefore, the coal-rock microcurrent is expected to be developed and utilized as a new energy source. If it can be successfully promoted on a large scale, it will be of great significance to promote the realization of the "dual carbon" goal and sustainable development.

[0005] However, the energy development and energy storage technology for coal-rock microcurrent is still blank. The main problems faced by existing related technologies include the lack of efficient microcurrent extraction technology, low efficiency of signal acquisition and processing, and the lack of effective energy storage solutions combined with microcurrent characteristics. These problems have led to the failure of effective development and utilization of coal-rock microcurrent, a renewable energy source. Summary of the invention

[0006] The purpose of the present invention is to solve the deficiencies in the prior art and to provide a loaded coal rock microcurrent extraction and energy storage system. Based on this system, the coal rock microcurrent can be effectively extracted and utilized to promote the application of clean energy and help achieve the "dual carbon" goals.

[0007] The specific technical solution of the present invention is: a loaded coal rock microcurrent extraction and energy storage system, including: a current acquisition module, used to collect the microcurrent signal generated when the coal rock is loaded, and transmit the collected current signal to the signal conditioning module; a signal conditioning module, used to amplify and condition the input microcurrent signal, the output end of the signal conditioning module is connected to the boost conversion module; a boost conversion module, used to boost the microcurrent signal to reach the voltage level required by the energy storage module, and the boosted voltage is output to the energy storage module; an energy storage module, used to store the extracted microcurrent signal as electrical energy.

[0008] Furthermore, the current acquisition module includes a plurality of micro-current sensors, and the micro-current sensors are installed on the surface or inside of the coal rock mass.

[0009] Preferably, the microcurrent sensors are installed in pairs on the surface or inside the coal rock mass.

[0010] Furthermore, the micro-current sensor is arranged in the stress concentration area or large stress difference area of ​​the coal rock mass.

[0011] Furthermore, the signal conditioning module includes an operational amplifier and a filter. The microcurrent signal collected by the current acquisition module is transmitted to the input end of the operational amplifier, and after being processed by the operational amplifier, it is input from its signal output end to the input end of the filter. The output end of the filter is connected to the boost conversion module.

[0012] Furthermore, the output voltage of the operational amplifier is within the normal operating range of the boost conversion module.

[0013] Furthermore, the voltage output by the boost conversion module is between 90% and 100% of the rated voltage of the energy conversion module.

[0014] Furthermore, the energy storage module is a supercapacitor or a lithium-ion battery.

[0015] Furthermore, the current acquisition module and the signal conditioning module, the signal conditioning module and the boost conversion module, and the boost conversion module and the energy storage module are all connected via shielded wires.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The application of the coal rock microcurrent extraction and energy storage system proposed in this application fills the gap in the development and utilization technology of coal rock microcurrent, and can effectively extract and store energy from the current signals inside the loaded coal rock in nature and underground engineering;

[0018] 2. This application makes deep use of coal rock microcurrent, which is obviously renewable and environmentally friendly, can promote the application of clean energy and provide new ideas for the development and utilization of clean energy;

[0019] 3. This application utilizes the natural characteristics of microcurrents in coal rock to achieve pollution-free, low-carbon electricity extraction, which is in line with the concept of sustainable development and shows broad market potential. It is expected to help achieve the "dual carbon" goals in my country and even the world. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system flow chart of the micro-current extraction and storage system of the loaded coal rock;

[0021] Figure 2 It is a schematic diagram of the module connection of the system for extracting and storing microcurrent from loaded coal and rock;

[0022] Among them, 1-microcurrent sensor, 2-coal rock mass, 3-signal conditioning module, 4-boost conversion module, 5-energy storage module;

[0023] 31- Operational amplifier, 32- Filter. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be included in the protection scope of the present invention.

[0025] Embodiment 1

[0026] In order to effectively develop and deeply utilize coal rock microcurrents, a loaded coal rock microcurrent extraction and storage system is provided in this embodiment, including a current acquisition module, a signal conditioning module, a boost conversion module and an energy storage module.

[0027] The current acquisition module is used to collect the microcurrent signal generated by the coal rock mass when it is loaded in real time. The module includes several microcurrent sensors. The specific model of the microcurrent sensor is not limited, but it must have good conductivity and high sensitivity. The microcurrent sensors are installed in pairs on the surface or inside the coal rock mass, preferably in areas where the stress of the coal rock mass is relatively concentrated or the stress difference is large. Specifically, the coal rock mass can be regarded as a natural "battery". The paired microcurrent sensors are equivalent to the two electrodes connected to the positive and negative poles of this natural "battery" respectively, and connected with the wire to form a loop. The paired arrangement facilitates the parallel connection of multiple pairs of circuits so that they can work simultaneously for current collection, and then facilitate the storage of the collected electrical energy in the energy storage module, thereby improving the storage capacity and storage efficiency. Among them, the potential difference of the "battery" is related to the stress difference. Under normal circumstances, the potential on the surface of the coal rock is the smallest. Therefore, in order to obtain a larger current value, it is generally chosen to place one electrode (that is, one of the paired microcurrent sensors) at the internal stress concentration point, and the other (the other of the paired microcurrent sensors) on the surface of the coal rock; of course, the two electrodes can also be placed in different positions or areas inside the coal rock depending on the situation. The layout principle is to facilitate the capture of high-intensity microcurrent signals.

[0028] The microcurrent sensor transmits the collected current signal to the signal conditioning module through a shielded wire. The shielded wire can shield the electrical signals in the environment to prevent the collected electrical signals from being interfered with during the transmission process.

[0029] The signal conditioning module is used to amplify and condition the micro-current signal to ensure the validity and accuracy of the signal and improve the accuracy of subsequent processing. It includes an operational amplifier and a filter. The micro-current signal collected by the current sensor is transmitted to the input end of the operational amplifier through a shielded wire. After amplification by the operational amplifier, it is input from its signal output end to the input end of the filter through a shielded wire. The output voltage of the operational amplifier should be within the normal working range of the boost conversion module (such as 0.5V to 2.5V) to ensure that the boost conversion module can start normally and effectively perform voltage conversion to avoid possible equipment damage. In the filter, the signal is processed by noise filtering, and then flows from the output end of the filter through a shielded wire into the boost conversion module.

[0030] The boost conversion module is used to boost the micro-current signal after conditioning and amplification to reach the voltage level required by the energy storage module, which is convenient for safe and efficient storage. The input end of the boost conversion module receives the current signal from the filter, and after boost conversion, it is output from the output end of the module to the energy storage module. The voltage output by the boost conversion module should be between 90% and 100% of the rated voltage of the energy conversion module to prevent overcharging and effectively extend the working life of the energy storage module. The boost conversion module has high conversion efficiency for the input signal, which can ensure as little energy loss as possible, and the boosted voltage is output to the energy storage module through shielded wires.

[0031] The energy storage module is used to store the current signal transmitted from the output end of the boost conversion module as electrical energy. The energy storage module is preferably a supercapacitor or a lithium-ion battery. The internal circuit of the module can provide power to low-power devices when necessary, or discharge under high demand conditions, providing stable power support for various application scenarios.

[0032] When using the above system to extract and store microcurrent, first install microcurrent sensors in pairs on the surface or inside of the loaded coal rock mass, and collect the microcurrent signals generated by the coal rock mass when it is loaded in real time. The collected microcurrent signals are transmitted to the operational amplifier through shielded wires for amplification, and then the amplified signals are transmitted to the filter for noise filtering. The amplified and noise-filtered signals are transmitted to the boost conversion module through shielded wires for voltage boosting. The microcurrent signal is further boosted to the voltage required by the energy storage module. Finally, the extracted microcurrent is stored as electrical energy using a supercapacitor or a lithium-ion battery, and the internal circuit is used for use by low-power devices or for discharge when necessary.

[0033] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Loaded coal rock micro-current extraction and energy storage system, characterized in that: include: The current acquisition module is used to collect the micro-current signal generated when the coal rock mass is loaded, and transmit the collected current signal to the signal conditioning module; A signal conditioning module is used to amplify and condition the input micro-current signal, and the output end of the signal conditioning module is connected to the boost conversion module; A boost conversion module is used to boost the micro-current signal to reach the voltage level required by the energy storage module, and the boosted voltage is output to the energy storage module; The energy storage module is used to store the extracted microcurrent signal as electrical energy.

2. The loaded coal rock micro-current extraction and energy storage system according to claim 1, characterized in that: The current acquisition module includes a plurality of micro-current sensors, and the micro-current sensors are arranged on the surface or inside of the coal rock mass.

3. The loaded coal rock micro-current extraction and energy storage system according to claim 2, characterized in that: Microcurrent sensors are installed in pairs on the surface or inside the coal rock mass.

4. The loaded coal rock micro-current extraction and energy storage system according to claim 2, characterized in that: The micro-current sensor is arranged in the stress concentration area or large stress difference area of ​​the coal rock mass.

5. The loaded coal rock micro-current extraction and energy storage system according to claim 1, characterized in that: The signal conditioning module includes an operational amplifier and a filter. The micro-current signal collected by the current acquisition module is transmitted to the input end of the operational amplifier, and after being processed by the operational amplifier, it is input from its signal output end to the input end of the filter. The output end of the filter is connected to the boost conversion module.

6. The loaded coal rock micro-current extraction and energy storage system according to claim 5, characterized in that: The output voltage of the operational amplifier is within the normal operating range of the boost converter module.

7. The loaded coal rock micro-current extraction and energy storage system according to claim 1, characterized in that: The voltage output by the boost conversion module is between 90% and 100% of the rated voltage of the energy conversion module.

8. The loaded coal rock micro-current extraction and energy storage system according to claim 1, characterized in that: The energy storage module is a supercapacitor or a lithium-ion battery.

9. The loaded coal rock micro-current extraction and energy storage system according to claim 1, characterized in that: The current acquisition module and the signal conditioning module, the signal conditioning module and the boost conversion module, and the boost conversion module and the energy storage module are all connected via shielded wires.

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