Coal particle gas adsorption and desorption analysis method and system based on RC circuit charging and discharging

Abstract

The present application relates to the technical field of gas occurrence analysis, and provides a method and system for analyzing the amount of gas adsorption and desorption of coal particles based on RC circuit charging and discharging. In this method, a gas adsorption and desorption simulation is performed on the coal particle adsorption and desorption experiment according to a pre-constructed adsorption and desorption simulation circuit; and the amount of gas desorption in the coal particle adsorption and desorption experiment is determined based on a pre-constructed electrical desorption simulation model. Thus, the gas pressure in the traditional coal particle adsorption and desorption experiment is simulated by voltage regulation, the tank volume in the traditional coal particle adsorption and desorption experiment is simulated by capacitor regulation, and the gas adsorption and gas desorption in the traditional coal particle adsorption and desorption experiment are simulated by circuit charging and circuit discharging. The entire experimental process completely avoids the risks existing in the traditional coal particle adsorption and desorption experiment, improves the reliability, operability and safety of the experiment, and effectively saves the experimental cost.

Description

Technical Field

[0001] The present application relates to the technical field of gas occurrence analysis, and in particular to a method and system for analyzing the adsorption and desorption of coal particles gas based on RC circuit charging and discharging. Background Art

[0002] Gas content is an important parameter that characterizes the gas occurrence status of coal seams. In order to ensure safe production in coal mines and efficient utilization of coalbed methane, it must be accurately measured in advance. The gas desorption amount is usually determined based on the gas desorption characteristics in the desorption experiment.

[0003] The existing gas adsorption and desorption experimental system is mainly composed of high-pressure methane gas cylinders, reference tanks, coal sample tanks, and desorption gas collection devices. In the experiment, gas is filled into the reference tank from the gas cylinder at a constant pressure. After the pressure stabilizes, the gas is injected from the reference tank into the coal sample tank. The coal particles in the coal sample tank adsorb gas in an isochoric environment, and the gas pressure in the coal sample tank decreases accordingly. After the adsorption equilibrium is reached, the gas in the coal sample tank is released into the desorption gas collection device of a specified volume, providing a desorption environment with a specified gas pressure for the coal particles, so that the coal particles desorb gas at a specified pressure, and the gas pressure of the experimental system increases with the gas desorption.

[0004] The commonly used methods for measuring gas content through the gas adsorption and desorption experimental system are pressure measurement and volumetric method. The difference between the two lies in the different desorption and gas collection devices. The main feature of the pressure measurement method is the constant desorption space, and the pressure gauge is used as the desorption monitoring instrument; the main feature of the volumetric method is that the desorption pressure is constant (normal pressure), and the desorption gas is collected by drainage gas collection, and the desorption amount is monitored by visual or micro-pressure differential sensors. However, when measuring the gas content through coal particle adsorption and desorption experiments, both the pressure measurement method and the volumetric method have defects and disadvantages. Summary of the invention

[0005] The purpose of this application is to provide a method and system for analyzing the adsorption and desorption of coal particle gas based on RC circuit charging and discharging, so as to solve or alleviate the problems existing in the above-mentioned prior art.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The present application provides a method for analyzing the amount of gas adsorption and desorption of coal particles based on RC circuit charging and discharging, comprising: performing gas adsorption and desorption simulation on a coal particle adsorption and desorption experiment according to a pre-constructed adsorption and desorption simulation circuit; wherein the adsorption and desorption simulation circuit comprises:

[0008] A voltage source, used to simulate the gas source in the coal particle adsorption and desorption experiment;

[0009] an adsorption capacitor, electrically connected to the voltage source via a first circuit switch;

[0010] A coal particle simulation circuit is electrically connected to the adsorption capacitor through a second circuit switch, comprising: RC analog circuits connected in parallel, each of which includes a particle capacitor and a particle resistor connected in series; is a positive integer;

[0011] a desorption capacitor, electrically connected to the coal particle simulation circuit via a third circuit switch;

[0012] The voltage source, the adsorption capacitor, and the coal particle simulation circuit constitute a gas adsorption simulation circuit to perform gas adsorption simulation in the coal particle adsorption and desorption experiment;

[0013] The coal particle simulation circuit and the desorption capacitor constitute a gas desorption simulation circuit to perform gas desorption simulation in the coal particle adsorption and desorption experiment;

[0014] Based on the pre-constructed electro-desorption simulation model, the gas desorption amount in the coal particle adsorption and desorption experiment is determined.

[0015] Preferably, a first voltmeter is connected in parallel to both ends of the adsorption capacitor; and / or a second voltmeter is connected in parallel to both ends of the desorption capacitor.

[0016] Preferably, an adsorption resistor is also provided on the circuit connecting the adsorption capacitor and the voltage source; and / or a desorption resistor is also provided between the desorption capacitor and the coal particle simulation circuit.

[0017] Preferably, the electrodesorption simulation model is:

[0018]

[0019] In the formula, is the gas desorption amount in the coal particle adsorption and desorption experiment;

[0020] is the capacitance value of the desorption capacitor; is standard atmospheric pressure, is the termination ambient temperature in the coal particle adsorption and desorption experiment, is the initial ambient temperature in the coal particle adsorption and desorption experiment; The equilibrium voltage between the adsorption capacitor and the coal particle simulation circuit during the gas adsorption simulation; is the initial voltage of the desorption capacitor, ,and ; is the time it takes for the adsorption capacitor and the coal particle simulation circuit to reach voltage balance during the gas adsorption simulation. The time length for the desorption capacitor and the coal particle simulation circuit to reach voltage balance during the gas desorption simulation; for The total resistance value of the particle resistors; for The total capacitance value of the particle capacitors.

[0021] The embodiment of the present application also provides a coal particle gas adsorption and desorption analysis system based on RC circuit charging and discharging, comprising: an experimental simulation unit, configured to perform gas adsorption and desorption simulation on a coal particle adsorption and desorption experiment according to a pre-constructed adsorption and desorption simulation circuit; wherein the adsorption and desorption simulation circuit comprises:

[0022] A voltage source, used to simulate the gas source in the coal particle adsorption and desorption experiment;

[0023] an adsorption capacitor, electrically connected to the voltage source via a first circuit switch;

[0024] A coal particle simulation circuit is electrically connected to the adsorption capacitor through a second circuit switch, comprising: RC analog circuits connected in parallel, each of the RC analog circuits includes a particle capacitor and a particle resistor connected in series, is a positive integer;

[0025] a desorption capacitor, electrically connected to the coal particle simulation circuit via a third circuit switch;

[0026] The voltage source, the adsorption capacitor, and the coal particle simulation circuit constitute a gas adsorption simulation circuit to perform gas adsorption simulation in the coal particle adsorption and desorption experiment; the coal particle simulation circuit and the desorption capacitor constitute a gas desorption simulation circuit to perform gas desorption simulation in the coal particle adsorption and desorption experiment;

[0027] The desorption calculation unit is configured to determine the gas desorption amount in the coal particle adsorption and desorption experiment based on a pre-built electrical desorption simulation model.

[0028] Beneficial effects:

[0029] In the coal particle gas adsorption and desorption analysis method based on RC circuit charging and discharging provided in the embodiment of the present application, first, according to the pre-constructed adsorption and desorption simulation circuit, the gas adsorption and desorption experiment of the coal particle is simulated; in the adsorption and desorption simulation circuit, the voltage source is used to simulate the gas source in the coal particle adsorption and desorption experiment, the adsorption capacitor is electrically connected to the voltage source through the first circuit switch, and the coal particle simulation circuit is electrically connected to the adsorption capacitor through the second circuit switch. Parallel RC simulation circuits are constructed, each of which includes a particle capacitor and a particle resistor connected in series, so as to simulate the coal sample particles in the coal particle adsorption and desorption experiment; a gas adsorption simulation circuit is composed of a voltage source, an adsorption capacitor, and a coal particle simulation circuit to simulate the gas adsorption in the coal particle adsorption and desorption experiment; a gas desorption simulation circuit is composed of a coal particle simulation circuit and a desorption capacitor to simulate the gas adsorption in the coal particle adsorption and desorption experiment; finally, based on the pre-constructed electrical desorption simulation, the gas desorption amount in the coal particle adsorption and desorption experiment is determined.

[0030] Therefore, the gas pressure in the traditional coal particle adsorption and desorption experiment is simulated by voltage regulation, the tank volume in the traditional coal particle adsorption and desorption experiment is simulated by capacitance regulation, and the gas adsorption and gas desorption in the traditional coal particle adsorption and desorption experiment are simulated by circuit charging and circuit discharging. The whole experimental process completely avoids the risks existing in the traditional coal particle adsorption and desorption experiment, improves the reliability, operability and safety of the experiment, and effectively saves the experimental cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. Among them:

[0032] Figure 1 It is a system schematic diagram of coal particle adsorption and desorption experiment in the prior art;

[0033] Figure 2 A schematic flow chart of a method for analyzing the amount of gas adsorption and desorption of coal particles based on RC circuit charging and discharging according to some embodiments of the present application;

[0034] Figure 3 A circuit diagram of an adsorption-desorption simulation circuit provided according to some embodiments of the present application;

[0035] Figure 4 for Figure 3 A schematic diagram of a gas adsorption simulation circuit in the adsorption and desorption simulation circuit shown;

[0036] Figure 5 for Figure 3 A schematic diagram of a gas desorption simulation circuit in the adsorption and desorption simulation circuit shown;

[0037] Figure 6 A schematic diagram of the structure of a coal particle gas adsorption and desorption analysis system based on RC circuit charging and discharging according to some embodiments of the present application. DETAILED DESCRIPTION

[0038] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present application and does not limit the present application. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present application without departing from the scope or spirit of the present application. For example, a feature shown or described as a part of an embodiment may be used in another embodiment to produce yet another embodiment. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the embodiments of the present invention should belong to the scope of protection of the embodiments of the present invention.

[0039] In the existing coal particle adsorption and desorption experiments, the high-pressure gas cylinder provides constant-pressure gas to the reference tank, and the reference tank provides constant-volume gas to the coal sample tank. The coal particles in the coal sample tank absorb the gas provided by the reference tank, reducing the air pressure in the reference tank, and then the coal particles in the coal sample tank desorb the gas to the desorption and gas collection device. However, when measuring the gas content through the coal particle adsorption and desorption experiment, both the pressure measurement method and the volumetric method have defects and disadvantages. Among them, in the pressure measurement method, the desorption environment pressure is unstable, the initial desorption pressure is uncertain, and the air pressure in the tank will affect the desorption of gas in the coal particles, thereby affecting the measurement accuracy; in the volumetric method, the desorption environment is a drainage and gas collection device. When draining and collecting gas, it is necessary to keep the device vertical and read the readings horizontally, which is inconvenient to operate. Moreover, in the coal particle adsorption and desorption experiment, whether it is a high-pressure gas cylinder, a reference tank, or a coal sample tank, they are all pressure tanks, and there are inevitable safety issues. For example, the valve of a methane high-pressure cylinder is loose or the connection between the pipeline and the valve is not tight, causing gas leakage; the container is damaged after being evacuated because it is not able to withstand the atmospheric pressure; the vacuum pump overpressure causes the container to explode, etc.

[0040] Based on this, the present application proposes a coal particle gas adsorption and desorption analysis method based on RC circuit charging and discharging. By assigning different voltage values ​​to the voltage source to simulate high-pressure methane cylinders with different pressures, and by adjusting the capacitance value of the adsorption capacitor to simulate coal sample tanks with different volumes, the charging and discharging process of the capacitor is used to equivalently describe the adsorption and desorption process of gas by coal particles, so as to completely avoid the risk problems in traditional coal particle adsorption and desorption experiments, and can effectively save experimental time and cost and improve experimental efficiency.

[0041] like Figures 1 to 5 As shown, the coal particle gas adsorption and desorption analysis method based on RC circuit charging and discharging includes:

[0042] Step S101: Perform gas adsorption and desorption simulation on the coal particle adsorption and desorption experiment according to the pre-constructed adsorption and desorption simulation circuit.

[0043] The structure of coal sample particles is highly similar when they adsorb and desorb gas and when they charge and discharge capacitors. First, both coal sample particles and capacitors adsorb microscopic particles. Coal sample particles adsorb and desorb gas molecules, and capacitors store and release charges. Second, coal sample particles adsorb gas molecules on the surface of the coal matrix. The larger the specific surface area of ​​the coal, the stronger the adsorption capacity. Capacitors store electrons on the surface of the capacitor plates. The larger the area of ​​the capacitor plates, the more electrons are stored. Third, the gas desorption airflow of coal sample particles and the capacitor discharge current are both formed by the detachment of particles from the material surface. The coal pore airflow is formed by the detachment of gas molecules from the surface of the coal matrix. The more desorbed molecules, the greater the gas flow. The capacitor discharge current is formed by the detachment of charges from the surface of the capacitor plates. The more charges released, the greater the current.

[0044] The physical processes of coal sample particles during gas adsorption and desorption and capacitor charging and discharging are highly similar. First, coal sample particle adsorption and desorption and capacitor charging and discharging both involve the process of particle monolayer adsorption and release on the solid surface. In coal sample particle adsorption and desorption, the particles are gas molecules and the solid is the coal matrix surface; in capacitor charging and discharging, the particles are electrons and the solid is the plate surface. Secondly, coal sample particle adsorption and desorption and capacitor charging and discharging both involve particle flow processes; in coal particle adsorption and desorption, gas molecules flow in the pores, and during adsorption, the molecules flow from the outside of the coal particles along the pore cracks to the pore surface, and during desorption, the molecules flow from the pore surface to the outside of the coal particles; in capacitor charging and discharging, electrons flow in the circuit, and during charging, electrons flow from the power supply through the circuit to the particle capacitor plate surface, and during discharging, electrons flow from the particle capacitor plate surface to the low-voltage component. Furthermore, coal sample particle adsorption and desorption and capacitor charging and discharging are both driven by gradient action. During the adsorption and desorption of coal sample particles, the adsorption environment is a high-pressure environment relative to the coal sample particles, and the desorption environment is a low-pressure environment relative to the coal sample particles; during capacitor charging and discharging, the charging power supply is a high-voltage environment relative to the particle capacitor, and the low-voltage component is a low-voltage environment relative to the particle capacitor.

[0045] Based on this, the present application simulates the adsorption and desorption experiment of coal particles through an adsorption simulation circuit. Specifically, the adsorption and desorption simulation circuit includes: a voltage source , adsorption capacitance , coal particle simulation circuit and desorption capacitor Among them, the voltage source Used to simulate the gas source in coal particle adsorption and desorption experiments, adsorption capacitance Through the first circuit switch With voltage source Electrical connection, coal particle simulation circuit through the second circuit switch With adsorption capacitance Electrical connection, desorption capacitor Through the third circuit switch It is electrically connected to the coal particle simulation circuit. In the coal particle simulation circuit, there are ( is a positive integer) parallel RC simulation circuits, each RC simulation circuit includes a particle capacitor and a particle resistor in series. That is, in the coal particle simulation circuit, there are Particle capacitors ,as well as Particle resistance .

[0046] In the adsorption capacitor With voltage source The connected circuit is equipped with an adsorption resistor , through the adsorption resistance The adjustment of the resistance value can effectively adjust the adsorption capacitance At the same time, the voltage value of the adsorption capacitor The first electric meter is connected in parallel at both ends to realize the adsorption capacitance Real-time monitoring of the voltage at both ends. When closed, the adsorption resistor , the first voltmeter It can realize the simulation and adjustment of the pressure when the gas is filled into the reference tank in the traditional coal particle adsorption and desorption experiment.

[0047] Voltage Source , adsorption capacitance , coal particle simulation circuit to form a gas adsorption simulation circuit, and perform gas adsorption simulation in coal particle adsorption and desorption experiments. After charging is completed, disconnect the first circuit switch , close the second circuit switch , adsorption capacitance That is, it starts to discharge to the coal particle simulation circuit; ( is a positive integer) parallel RC simulation circuits, the particle capacitor in each RC simulation circuit begins to charge, so as to perform an equivalent simulation of the process of gas adsorption by the coal sample particles in the coal sample tank from the reference tank in the coal particle adsorption and desorption experiment. When the voltage balance is reached with the coal particle simulation circuit, the particle capacitance in the coal particle simulation circuit is fully charged, which is equivalent to the reference tank and the coal sample tank reaching pressure balance, and the gas adsorption of the coal sample particles in the coal particle adsorption and desorption experiment is completed. Here, it should be noted that by adjusting the resistance value of the particle resistor of each RC simulation circuit, the adsorption physical conditions such as the pore size of the coal sample particles can be simulated.

[0048] Coal particle simulation circuit and desorption capacitor A gas desorption simulation circuit is formed to simulate the gas desorption in the coal particle adsorption experiment. Specifically, after the particle capacitor in the coal particle simulation circuit is fully charged, the second circuit switch is disconnected. , close the third circuit switch , the particle capacitance in the coal particle simulation circuit is discharged, and the desorption capacitance The coal particle simulation circuit and the desorption capacitor are connected to realize the gas desorption simulation between the coal sample tank and the desorption gas collection device in the traditional gas adsorption and desorption experiment. When the voltage reaches equilibrium, the particle capacitance in the coal particle simulation circuit is discharged, and the desorption capacitance The charging is completed, which is equivalent to the pressure balance between the coal sample tank and the desorption gas collecting device in the traditional gas adsorption and desorption experiment, and the gas desorption is completed.

[0049] At the same time, the desorption capacitor A desorption resistor is also provided between the coal particle simulation circuit and the , by adjusting the desorption resistance The resistance value is used to realize the desorption capacitance The voltage value at both ends is regulated; at the same time, the desorption capacitor A second voltmeter is connected in parallel at both ends of , in order to achieve the desorption capacitance Real-time monitoring of the voltage at both ends. When closed, the desorption resistor is used , Second voltmeter It can realize the simulation adjustment of the effective space volume of the desorption gas collection device during desorption in the traditional coal particle adsorption and desorption experiment.

[0050] Thus, the adsorption and desorption simulation circuit effectively avoids the leakage caused by loose connection between components in the traditional coal particle adsorption and desorption experiment, reduces the experimental error and improves the experimental accuracy; at the same time, the desorption capacitor The initial voltage can be precisely controlled, which effectively eliminates the influence of the gas pressure in the tank of the desorption gas collection device on the gas desorption of coal sample particles in the traditional coal particle adsorption and desorption experiment, and improves the experimental accuracy.

[0051] Step S102: Determine the gas desorption amount in the coal particle adsorption and desorption experiment based on the pre-constructed electrical desorption simulation model.

[0052] Specifically, the electrodesorption simulation model is:

[0053]

[0054] In the formula, It is the gas desorption amount in the coal particle adsorption and desorption experiment.

[0055] Desorption capacitance Capacitance value; is standard atmospheric pressure, is the termination ambient temperature in the coal particle adsorption and desorption experiment, is the initial ambient temperature in the coal particle adsorption and desorption experiment; When simulating gas adsorption, the adsorption capacitor Balance voltage with coal particle simulation circuit; Desorption capacitance The initial voltage, ,and ; When simulating gas adsorption, the adsorption capacitor The time it takes to reach voltage balance with the coal particle simulation circuit, When simulating gas desorption, the desorption capacitor The time it takes to reach voltage equilibrium with the coal particle simulation circuit; for The total resistance value of the particle resistors; for The total capacitance value of the particle capacitors.

[0056] In the traditional coal particle adsorption and desorption experiment, the temperature control auxiliary system is used to adjust the temperature during the gas adsorption and desorption process. And the initial ambient temperature Equivalent simulation of the traditional temperature environment is performed to set the temperature, effectively avoiding the adjustment and monitoring errors of the temperature control auxiliary system.

[0057] Therefore, the gas pressure in the traditional coal particle adsorption and desorption experiment is simulated by voltage regulation, the tank volume in the traditional coal particle adsorption and desorption experiment is simulated by capacitance regulation, and the gas adsorption and gas desorption in the traditional coal particle adsorption and desorption experiment are simulated by circuit charging and circuit discharging. The entire experimental process completely avoids the risks existing in the traditional coal particle adsorption and desorption experiment, improves the experimental reliability, operability and safety, and effectively saves the experimental cost.

[0058] The embodiment of the present application also provides a coal particle gas adsorption and desorption analysis system based on RC circuit charging and discharging, such as Figure 6 As shown, the system includes:

[0059] The experimental simulation unit 601 is configured to perform gas adsorption and desorption simulation on the coal particle adsorption and desorption experiment according to a pre-built adsorption and desorption simulation circuit; wherein the adsorption and desorption simulation circuit includes:

[0060] Voltage Source , used to simulate the gas source in the coal particle adsorption and desorption experiment;

[0061] Adsorption Capacitance , through the first circuit switch With voltage source Electrical connection;

[0062] Coal particle simulation circuit, through the second circuit switch With adsorption capacitance Electrical connections, including There are parallel RC simulation circuits, each of which includes a particle capacitor and a particle resistor in series. is a positive integer;

[0063] Desorption capacitance , through the third circuit switch being electrically connected to a coal particle simulation circuit;

[0064] Voltage Source , adsorption capacitance , coal particle simulation circuit to form a gas adsorption simulation circuit to simulate gas adsorption in coal particle adsorption and desorption experiments; coal particle simulation circuit and desorption capacitor A gas desorption simulation circuit is formed to simulate gas desorption in coal particle adsorption and desorption experiments;

[0065] The desorption calculation unit 602 is configured to determine the gas desorption amount in the coal particle adsorption and desorption experiment based on a pre-built electrical desorption simulation model.

[0066] The coal particle gas adsorption and desorption analysis system based on RC circuit charging and discharging provided in the embodiment of the present application can implement the steps and processes of the coal particle gas adsorption and desorption analysis method based on RC circuit charging and discharging of any of the above embodiments, and achieve the same technical effects, which will not be repeated here one by one.

[0067] In the description of the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for analyzing the adsorption and desorption of coal gas based on RC circuit charging and discharging, characterized in that: include: According to the pre-built adsorption and desorption simulation circuit, the gas adsorption and desorption simulation is performed on the coal particle adsorption and desorption experiment; wherein the adsorption and desorption simulation circuit includes: A voltage source, used to simulate the gas source in the coal particle adsorption and desorption experiment; an adsorption capacitor, electrically connected to the voltage source via a first circuit switch; A coal particle simulation circuit is electrically connected to the adsorption capacitor through a second circuit switch, comprising: RC analog circuits connected in parallel, each of which includes a particle capacitor and a particle resistor connected in series; is a positive integer; a desorption capacitor, electrically connected to the coal particle simulation circuit via a third circuit switch; The voltage source, the adsorption capacitor, and the coal particle simulation circuit constitute a gas adsorption simulation circuit to perform gas adsorption simulation in the coal particle adsorption and desorption experiment; The coal particle simulation circuit and the desorption capacitor constitute a gas desorption simulation circuit to perform gas desorption simulation in the coal particle adsorption and desorption experiment; Based on the pre-constructed electro-desorption simulation model, the gas desorption amount in the coal particle adsorption and desorption experiment is determined; wherein the electro-desorption simulation model is: In the formula, is the gas desorption amount in the coal particle adsorption and desorption experiment; is the capacitance value of the desorption capacitor; is standard atmospheric pressure, is the termination ambient temperature in the coal particle adsorption and desorption experiment, is the initial ambient temperature in the coal particle adsorption and desorption experiment; The equilibrium voltage between the adsorption capacitor and the coal particle simulation circuit during the gas adsorption simulation; is the initial voltage of the desorption capacitor, ,and ; is the time it takes for the adsorption capacitor and the coal particle simulation circuit to reach voltage balance during the gas adsorption simulation. The time length for the desorption capacitor and the coal particle simulation circuit to reach voltage balance during the gas desorption simulation; for The total resistance value of the particle resistors; for The total capacitance value of the particle capacitors.

2. The coal particle gas adsorption and desorption analysis method based on RC circuit charging and discharging according to claim 1 is characterized in that: A first voltmeter is connected in parallel at both ends of the adsorption capacitor; and / or, A second voltmeter is connected in parallel to both ends of the desorption capacitor.

3. The coal particle gas adsorption and desorption analysis method based on RC circuit charging and discharging according to claim 1 is characterized in that: An adsorption resistor is also provided on the circuit connecting the adsorption capacitor and the voltage source; and / or, A desorption resistor is also provided between the desorption capacitor and the coal particle simulation circuit.

4. A coal particle gas adsorption and desorption analysis system based on RC circuit charging and discharging, characterized in that: include: The experimental simulation unit is configured to perform gas adsorption and desorption simulation on the coal particle adsorption and desorption experiment according to a pre-built adsorption and desorption simulation circuit; wherein the adsorption and desorption simulation circuit includes: A voltage source, used to simulate the gas source in the coal particle adsorption and desorption experiment; an adsorption capacitor, electrically connected to the voltage source via a first circuit switch; A coal particle simulation circuit is electrically connected to the adsorption capacitor through a second circuit switch, comprising: parallel RC simulation circuits, each of which includes a particle capacitor and a particle resistor connected in series, is a positive integer; a desorption capacitor, electrically connected to the coal particle simulation circuit via a third circuit switch; The voltage source, the adsorption capacitor, and the coal particle simulation circuit constitute a gas adsorption simulation circuit to perform gas adsorption simulation in the coal particle adsorption and desorption experiment; the coal particle simulation circuit and the desorption capacitor constitute a gas desorption simulation circuit to perform gas desorption simulation in the coal particle adsorption and desorption experiment; The desorption calculation unit is configured to determine the gas desorption amount in the coal particle adsorption and desorption experiment based on a pre-built electro-desorption simulation model; wherein the electro-desorption simulation model is: In the formula, is the gas desorption amount in the coal particle adsorption and desorption experiment; is the capacitance value of the desorption capacitor; is standard atmospheric pressure, is the termination ambient temperature in the coal particle adsorption and desorption experiment, is the initial ambient temperature in the coal particle adsorption and desorption experiment; The equilibrium voltage between the adsorption capacitor and the coal particle simulation circuit during the gas adsorption simulation; is the initial voltage of the desorption capacitor, ,and ; is the time it takes for the adsorption capacitor and the coal particle simulation circuit to reach voltage balance during the gas adsorption simulation. The time length for the desorption capacitor and the coal particle simulation circuit to reach voltage balance during the gas desorption simulation; for The total resistance value of the particle resistors; for The total capacitance value of the particle capacitors.

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