Coal body inhibition mechanism research system and quantification method based on microscopic component in-situ monitoring

Abstract

The invention provides a coal inhibition mechanism research system and quantification method based on microscopic component in-situ monitoring, an integrated reaction cabin system is constructed, coal sample functional groups, free radicals and gas product data are synchronously collected during temperature programming, and a linkage evolution cloud chart is established; forming a three-gradient experiment group by using supercritical CO2 cleaning and separating physical and chemical inhibition effects; based on an oxidation reaction kinetic model, experimental group data are compared to quantify physical and chemical inhibition contribution rates, accurate analysis of a coal inhibition mechanism is realized, a method and equipment support is provided for directional design of an inhibitor, and the method is suitable for the field of coal spontaneous combustion prevention and control and inhibition technology research. The problems that in existing coal body inhibition mechanism research, coal body microcosmic components and gas products in the heating process cannot be synchronously collected to define the inhibition effect microresponse rule, physical and chemical inhibition effects are difficult to separate, the precision of a quantitative model is insufficient, related equipment is single in function and poor in collaboration, and data interaction is insufficient are solved.

Description

Technical Field

[0001] This invention relates to the field of coal inhibition mechanism research technology, and in particular to a coal inhibition mechanism research system and quantification method based on in-situ monitoring of micro-components. Background Technology

[0002] In the development of the coal industry, the problem of spontaneous combustion due to coal oxidation has always been a key challenge threatening the safety of coal mining and the stability of storage. As a core means of preventing spontaneous combustion of coal, a clear understanding and precise quantification of its mechanism of action is of great significance for the efficient development of inhibitors and the improvement of their inhibitory effects. However, existing technologies face many bottlenecks in the study of coal inhibition mechanisms that urgently need to be overcome.

[0003] Coal oxidation involves changes in functional groups and free radicals, as well as gas release. However, traditional research relies on multiple discrete devices to monitor the microscopic components and gaseous products of coal. The heating and insulation parameters of these devices lack standardized parameters, making it impossible to collect data synchronously at the same temperature point. This results in an inaccurate correlation between temperature, microscopic components, and gaseous products, significantly reducing data correlation and accuracy, and hindering the establishment of an effective link between microscopic mechanisms and macroscopic phenomena. Furthermore, fixed monitoring parameters cannot adapt to the multi-stage reaction characteristics of coal, ranging from slow oxidation to accelerated oxidation to violent oxidation, nor can they match the differences in oxidation rates among different coal types. Moreover, physical and chemical inhibition are difficult to separate and quantify. This means that research can only calculate the overall inhibition rate, failing to quantify the contribution rate of each type of inhibition. The theoretical framework of the mechanism is incomplete due to the lack of quantitative support for detailed effects, failing to provide targeted guidance for inhibitor optimization. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention aims to provide a coal body inhibition mechanism research system and quantification method based on in-situ monitoring of micro-components, in order to solve the problems in existing coal body inhibition mechanism research, such as the inability to simultaneously collect coal body micro-components and gaseous products during the heating process to clarify the micro-response law of inhibition, the difficulty in separating physical and chemical inhibition effects, the insufficient accuracy of quantification models, and the single function and poor coordination of related equipment and insufficient data interaction.

[0005] To achieve the above objectives, this invention proposes a coal resistance mechanism research system based on in-situ monitoring of micro-components, comprising an integrated dynamic monitoring system and a central control system. The integrated dynamic monitoring system includes an infrared detection unit, an electron paramagnetic detection unit, and a gas chromatography detection unit. The infrared detection unit is used to detect the functional group content in the coal sample and includes a vacuum pump, an infrared sample chamber, an optical fiber transmission component, and a Fourier transform infrared detection element connected in sequence, capable of transmitting the characteristic spectral signals of functional groups in the coal sample in real time. The electron paramagnetic detection unit is used to detect the free radical content in the coal sample and includes an electron paramagnetic resonance cavity, a probe system, an electromagnetic microwave system, and an electronics system connected in sequence, capable of transmitting signals to the central control system. The electromagnetic microwave system transmits electromagnetic wave signals. The electron paramagnetic resonance resonant cavity is surrounded by a magnetic shield. The electromagnetic microwave system includes a microwave bridge system and an electromagnetic field system. The gas chromatography detection unit is used to detect the gas production pattern of the coal sample. It includes a gas distribution system, a chromatographic sample chamber, and a chromatographic separation element connected in sequence, which can detect the components of the oxidizing gas of the coal sample. The infrared sample chamber, the chromatographic sample chamber, and the electron paramagnetic resonance resonant cavity are all integrated in a programmed temperature reaction chamber. The programmed temperature reaction chamber is equipped with a light source and a temperature sensor. The central control system is used to collect the temperature data of the programmed temperature reaction chamber, the spectral data of the infrared detection unit, the electromagnetic wave data of the electron paramagnetic detection unit, and the gas chromatography data of the gas chromatography detection unit.

[0006] In the above scheme: the infrared sample chamber is connected to the optical fiber transmission assembly via an insulated conduit; the chromatographic sample chamber is connected to the chromatographic separation element via an insulated conduit; and the electron paramagnetic resonance cavity, probe system, electromagnetic microwave system, and electronics system are also sequentially connected via insulated conduits. The insulated conduits are made of stainless steel and have good grounding with the programmed temperature reaction chamber.

[0007] In the above scheme: a one-way valve is provided on the heat-insulated pipeline between the chromatographic sample chamber and the chromatographic separation element to prevent gas backflow.

[0008] In the above scheme: the infrared sample chamber is made of quartz material, and the magnetic shielding cover is made of supermetal or high-permeability alloy. Compared with ordinary glass, quartz absorbs less infrared light and will not generate interference peaks in key wavelength bands, ensuring more accurate detection results; the magnetic shielding cover encloses the entire electron paramagnetic resonance cavity, achieving magnetic shielding and avoiding interference from magnetic fields.

[0009] In the above scheme: the programmed heating reaction chamber is made of 316L stainless steel and uses a non-magnetic heating wire for heating. The non-magnetic heating wire is a uniform double-wound non-inductive coil to reduce its own magnetic field.

[0010] This invention also proposes a quantitative method for coal body inhibition mechanism based on in-situ monitoring of micro-components, including the aforementioned coal body inhibition mechanism research system based on in-situ monitoring of micro-components, comprising the following steps:

[0011] S1. Preparation and processing of multiple samples;

[0012] Raw coal samples were selected as the control group, and coal samples after inhibition treatment were selected as the uncleaned inhibition group. Another portion of the inhibited coal samples were cleaned using supercritical CO2 cleaning technology to remove residual inhibition materials, resulting in an experimental group that retained only the chemical effect, thus forming a three-gradient sample group.

[0013] S2. Synchronous monitoring and data acquisition;

[0014] Three sets of samples were placed in a programmed temperature-increasing reaction chamber and heated according to the set program. The infrared sample chamber, the chromatographic sample chamber, and the electron paramagnetic resonance resonant cavity were heated synchronously. The infrared detection unit captured the changes in the characteristic absorption peaks of functional groups in real time, the electron paramagnetic detection unit recorded the fluctuations in the number of free radicals, and the gas chromatography detection unit analyzed the composition and content of the gases released at different temperature ranges. The three units transmitted the monitoring data to the central control system, which processed the data and generated a temperature-functional group-free radical-gas linkage evolution cloud map.

[0015] S3. Quantitative analysis of inhibition effect;

[0016] Based on the oxidation reaction kinetic model, by comparing the monitoring data of the three-gradient sample groups and analyzing the differences between the unwashed inhibition group and the control group, the total effect of physical and chemical inhibition was obtained; by comparing the differences between the experimental group and the control group after washing, the chemical inhibition effect was quantified separately; the difference in inhibition rates between the two inhibitors is the contribution rate of physical inhibition, achieving precise separation and quantification of physical and chemical inhibition effects; the formula for calculating the inhibitor inhibition rate is:

[0017]

[0018] In the formula, R is the inhibition rate of the inhibitor (%), and A is the volume fraction of CO produced by raw coal at a certain temperature (%). -6 B represents the volume fraction of CO produced by coal samples treated with different inhibitors at the same temperature, 10 -6 .

[0019] In the above scheme: if abnormal pipeline temperature occurs during the monitoring process, the operation of the corresponding device is suspended, and data is collected again after the system is restored; if a device fails, the faulty device is isolated and the time point is recorded, and the remaining data is interpolated to complete the data after the fault is eliminated; after the experiment is completed, inert gas is introduced into the programmed temperature rise reaction chamber for purging.

[0020] In the above scheme: after selecting coal samples, they are first crushed and screened through a standard sieve to obtain uniform particles of 0.25-0.5mm. Then, the screened coal samples are placed in a 105℃ constant temperature drying oven and dried to constant weight. During the drying process, the difference between two weighings is controlled to be ≤0.1g. The dried coal samples are divided into three graded sample groups of 50g / part. The unwashed inhibition group is soaked in a 10% MgCl2 inhibition agent solution for 2 hours and air-dried to constant weight. The inhibition agent is retained on the surface and in the pores of the coal sample to form a state in which physical and chemical inhibition coexist. The experimental group takes coal samples with the same inhibition treatment and removes the physical residual inhibition agent using supercritical CO2 technology with a pressure of 22MPa, a temperature of 32℃, a CO2 flow rate of 1L / min, and a washing time of 35min. After drying, the samples are sealed for later use.

[0021] The beneficial effects of this invention are as follows: 1. By integrating various detection units, it achieves, for the first time, in-situ, real-time, and continuous acquisition of "temperature-functional groups-free radicals-gas products" during programmed heating, solving the problem of isolated detection of single parameters in traditional technologies and the inability to reveal the linkage between microscopic components and macroscopic gas production, thus providing systematic data support for the study of coal oxidation mechanisms. 2. Using supercritical CO2 cleaning technology to treat inhibited coal samples can efficiently remove physically residual inhibitors without destroying the chemical action of the coal, solving the technical bottleneck of mutual interference between physical and chemical inhibition and the difficulty in quantifying them separately, and achieving accurate differentiation between the "chemical action group," "mixed action group," and control group, providing a reliable experimental means for separating the two types of inhibition. 3. Based on multi-parameter detection data, a computational model is constructed. Through comparative analysis of three-gradient experimental groups, the contribution rate of physical coverage and chemical action to the inhibition effect can be accurately quantified, breaking through the limitation of traditional inhibition effect evaluation that can only reflect the comprehensive effect and cannot provide targeted guidance for inhibitor optimization, providing a quantitative basis for inhibitor composition design and performance improvement. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a coal body inhibition mechanism research system based on in-situ monitoring of micro-components. Detailed Implementation

[0023] like Figure 1 As shown, a coal body inhibition mechanism research system based on in-situ monitoring of micro-components mainly consists of an integrated dynamic monitoring system and a central control system 1.

[0024] The integrated dynamic monitoring system includes an infrared detection unit A, an electron paramagnetic detection unit B, and a gas chromatography detection unit C. Infrared detection unit A is used to detect the functional group content in coal samples. It includes a vacuum pump 2, an infrared sample chamber 3, an optical fiber transmission assembly 4, and a Fourier transform infrared detection element 5, connected in sequence, which can transmit the characteristic spectral signals of functional groups in the coal sample in real time.

[0025] Electron paramagnetic detection unit B is used to detect the free radical content in coal samples. It includes an electron paramagnetic resonance resonant cavity 16, a probe system 7, an electromagnetic microwave system, and an electronics system 10 connected in sequence. It can transmit electromagnetic wave signals to the central control system 1. The electron paramagnetic resonance resonant cavity 16 is wrapped with a magnetic shield 6. The electromagnetic microwave system includes a microwave bridge system 8 and an electromagnetic field system 9.

[0026] The gas chromatography detection unit C is used to detect the gas production pattern of coal samples. It includes a gas distribution system 11, a chromatographic sample chamber 12 and a chromatographic separation element 13 connected in sequence, which can detect the components of the oxidizing gas of the coal sample.

[0027] The infrared sample chamber 3, the chromatographic sample chamber 12, and the electron paramagnetic resonance resonant cavity 16 are all integrated into a temperature-programmed reaction chamber 14, which is equipped with a light source and a temperature sensor. The central control system 1 is used to collect temperature data from the temperature-programmed reaction chamber 14, spectral data from the infrared detection unit A, electromagnetic wave data from the electron paramagnetic detection unit B, and gas chromatographic data from the gas chromatographic detection unit C.

[0028] Ideally, the infrared sample chamber 3 and the fiber optic transmission assembly 4 are connected via insulated tubing, the chromatographic sample chamber 12 and the chromatographic separation element 13 are connected via insulated tubing, and the electron paramagnetic resonance resonant cavity 16, the probe system 7, the electromagnetic microwave system, and the electronics system 10 are also connected sequentially via insulated tubing. The insulated tubing is made of stainless steel and has good grounding with the programmed temperature reaction chamber 14.

[0029] Ideally, a one-way valve 15 should be installed on the insulated pipeline between the chromatographic sample chamber 12 and the chromatographic separation element 13 to prevent gas backflow.

[0030] Ideally, the infrared sample chamber 3 should be made of quartz, and the magnetic shield 7 should be made of a supermetal or a high-permeability alloy. Compared to ordinary glass, quartz absorbs less infrared light and will not generate interference peaks in key wavelength bands, ensuring more accurate detection results. The magnetic shield 7 encloses the entire electron paramagnetic resonance cavity 16, achieving magnetic shielding and avoiding interference from magnetic fields.

[0031] Ideally, the programmed temperature reaction chamber 14 is made of 316L stainless steel (500mL effective volume) and heated using a non-magnetic heating wire (such as Kanthal APM, platinum-rhodium alloy). The non-magnetic heating wire is a uniformly wound double-wound non-inductive coil to reduce its own magnetic field.

[0032] A quantitative method for coal body inhibition mechanism based on in-situ monitoring of micro-components, comprising the aforementioned coal body inhibition mechanism research system based on in-situ monitoring of micro-components, mainly consists of the following steps:

[0033] S1. Preparation and processing of multiple samples;

[0034] Raw coal samples were selected as the control group, and coal samples after inhibition treatment were selected as the un-cleaned inhibition group. Another portion of the inhibited coal samples were cleaned using supercritical CO2 cleaning technology to remove residual inhibition materials, resulting in an experimental group that retained only the chemical effect, thus forming a three-gradient sample group.

[0035] Specifically, after selecting coal samples, they were first crushed and screened through a standard sieve to obtain uniform particles of 0.25-0.5mm to ensure consistent specific surface area and reduce interference from particle differences on experimental results. The screened coal samples were then dried in a 105℃ constant temperature drying oven to constant weight, with the weight difference between two weighings controlled to ≤0.1g during drying to thoroughly remove free moisture and avoid affecting subsequent monitoring. The dried coal samples were divided into three gradient sample groups of 50g / sample: the control group consisted of raw coal samples, which were sealed directly without inhibition treatment; the untreated inhibition group was soaked in a 10% MgCl2 inhibitor solution for 2 hours and then air-dried to constant weight, retaining residual inhibitors on the coal sample surface and within the pores to create a state where physical and chemical inhibition coexist; the experimental group used coal samples with the same inhibition treatment, and removed the physical residual inhibitors using supercritical CO2 technology at a pressure of 22MPa, a temperature of 32℃, a CO2 flow rate of 1L / min, and a washing time of 35min (without destroying the chemical interaction between the coal and the inhibitor), then air-dried and sealed for later use.

[0036] System commissioning: Check the sealing of all pipe joints (leakage rate ≤ 1×10⁻⁶). -9 To prevent gas leakage from affecting concentration detection, the temperature programmable reaction chamber 14 was run unloaded for 30 minutes (heated to 100℃) to verify that the chamber temperature fluctuation was ≤±0.5℃. The infrared detection unit A (hydroxyethanol vapor was introduced into the sample chamber) and the electron paramagnetic detection unit B (1,1-diphenyl-2-trinitrophenylhydrazine standard free radical sample was introduced into the resonant cavity) were started to confirm that the detection signal was accurate and stable. At the same time, the gas separation and quantification accuracy of the gas chromatography detection unit C were verified to ensure that the data was transmitted to the central control system 1 in real time.

[0037] S2. Synchronous monitoring and data acquisition;

[0038] The three sets of samples were placed in the programmed temperature reaction chamber 14, and after all chambers were closed, the vacuum pump 2 evacuated the infrared sample chamber 3; the gas mixing system 11 adjusted the chromatographic sample chamber 12 to a pressure ≤10Pa to eliminate air interference, and then simulated air (O2 21%, N2 79%, purity ≥99.99%) was introduced into the chromatographic sample chamber to a pressure of 0.1MPa.

[0039] The temperature is increased in a stepped manner from 25 to 300℃ according to the set program (at a rate of 5℃ / min, balancing efficiency and accuracy). Miniature non-magnetic thermocouples (such as type K) or fiber optic temperature sensors are placed near the coal sample. The infrared sample chamber 3, the chromatographic sample chamber 12, and the electron paramagnetic resonance resonant cavity 16 are heated synchronously. The infrared detection unit A captures the changes in the characteristic absorption peaks of functional groups in real time, the electron paramagnetic detection unit B records the fluctuations in the number of free radicals, and the gas chromatography detection unit C analyzes the composition and content of the gases released at different temperature ranges. The three units transmit the monitoring data to the central control system 1, which processes the data and generates a temperature-functional group-free radical-gas linkage evolution cloud map.

[0040] Specifically, infrared detection unit A collects characteristic absorption peak data of functional groups in the infrared sample chamber every 5°C, with a focus on monitoring the 3400 cm⁻¹ peak. -1 Hydroxyl group, 1600cm -1 Aromatic ring, 1720cm -1 The peak area and height of carboxyl groups change; the electron paramagnetic detection unit B acquires free radical signals in real time (concentration is calculated by integrating the signal area using a g-factor of ≈2.003, with a 1-second sampling interval); oxidizing gas enters the insulated pipeline through the central outlet at the top of the chamber, and the gas chromatography detection unit C completes gas component separation and detection every 10 minutes, focusing on the CO volume fraction. The central control system 1 synchronously stores the data and generates a temperature-functional group (peak area)-free radical (concentration)-gas (CO volume fraction) linkage evolution cloud map using LabVIEW (vertical axis: temperature, horizontal axis: parameters, color depth indicates numerical value).

[0041] S3. Quantitative analysis of inhibition effect;

[0042] Based on the oxidation reaction kinetic model, by comparing the monitoring data of the three-gradient sample groups and analyzing the differences between the unwashed inhibition group and the control group, the total effect of physical and chemical inhibition was obtained; by comparing the differences between the experimental group and the control group after washing, the chemical inhibition effect was quantified separately; the difference in inhibition rates between the two inhibitors is the contribution rate of physical inhibition, achieving precise separation and quantification of physical and chemical inhibition effects; the formula for calculating the inhibitor inhibition rate is:

[0043]

[0044] In the formula, R is the inhibition rate of the inhibitor (%), and A is the volume fraction of CO produced by raw coal at a certain temperature (%). -6 B represents the volume fraction of CO produced by coal samples treated with different inhibitors at the same temperature, 10 -6 .

[0045] Specifically, the LabVIEW data processing module was used to normalize the data of the three gradient groups (using the parameters of the control group at 25℃ as a benchmark, converting the parameters of each temperature point into relative values ​​to eliminate the small differences in the initial mass of the coal samples). Based on the kinetic model of the primary oxidation reaction of coal (fitting the relationship between oxidation rate and temperature), and combined with the inhibitor inhibition rate formula, the average inhibition rate R1 (45%-55%, total physical and chemical effect) of the unwashed group and the average inhibition rate R2 (20%-30%, chemical effect only) of the experimental group were calculated at 150℃, 200℃, and 250℃ (active oxidation period of coal). The contribution rate of physical inhibition (25%-35%) was obtained by subtracting R1 from R2, achieving precise separation and quantification of the two types of inhibition.

[0046] Anomaly Handling and Data Correction: The central control system 14 monitors parameters in real time. When the insulation pipeline deviates from 80℃±2℃, the backup temperature control is automatically activated (heat tracing cable is activated for supplemental heating at <78℃, and cooling fan is activated for >82℃), gas phase sampling is suspended, and gas data for that temperature range (temperature difference ≤5℃) is re-sampled after the temperature recovers to 80℃±0.5℃. If the infrared signal is abnormal (e.g., sample chamber blockage), the corresponding pipeline is shut off, and the backup pipeline is used for re-sampling. If the electron paramagnetic detection unit B malfunctions, the electron paramagnetic resonance cavity 16 is immediately isolated and the fault temperature point is recorded. After troubleshooting, the missing part is supplemented using a backup experimental group coal sample. After fault handling, the missing part is filled in by linear interpolation based on the normal data before and after to ensure continuity. After the experiment is completed (heated to 300℃ and held for 30 min), the programmed heating system is turned off. N2 with a purity ≥99.999% (1L / min) is purged into the programmed heating reaction chamber 14, the infrared sample chamber 3, and the electron paramagnetic resonance resonant cavity 16 (with a pre-reserved interface) for 30 min to remove residual gas and coal dust and avoid cross-contamination. Then the equipment is turned off and the experimental data is collected for later use.

Claims

1. A system for studying the coal body inhibition mechanism based on in-situ monitoring of micro-components, characterized in that: The system includes an integrated dynamic monitoring system and a central control system (1). The integrated dynamic monitoring system includes an infrared detection unit (A), an electron paramagnetic detection unit (B), and a gas chromatography detection unit (C). The infrared detection unit (A) is used to detect the functional group content in the coal sample. It includes a vacuum pump (2), an infrared sample chamber (3), an optical fiber transmission component (4), and a Fourier transform infrared detection element (5) connected in sequence. It can transmit the characteristic spectral signal of the functional group in the coal sample in real time. The electron paramagnetic detection unit (B) is used to detect the free radical content in the coal sample. It includes an electron paramagnetic resonance cavity (16), a probe system (7), an electromagnetic microwave system, and an electronics system (10) connected in sequence. It can transmit electromagnetic wave signals to the central control system (1). The electron paramagnetic resonance cavity (16) is wrapped with magnetic shielding. The electromagnetic microwave system includes a microwave bridge system (8) and an electromagnetic field system (9). The gas chromatography detection unit (C) is used to detect the gas production pattern of the coal sample. It includes a gas distribution system (11), a chromatographic sample chamber (12), and a chromatographic separation element (13) connected in sequence. It can detect the components of the oxidizing gas of the coal sample. The infrared sample chamber (3), the chromatographic sample chamber (12), and the electron paramagnetic resonance resonant cavity (16) are all integrated in a programmed temperature reaction chamber (14). The programmed temperature reaction chamber (14) is equipped with a light source and a temperature sensor. The central control system (1) is used to collect the temperature data of the programmed temperature reaction chamber (14), the spectral data of the infrared detection unit (A), the electromagnetic wave data of the electron paramagnetic detection unit (B), and the gas chromatography data of the gas chromatography detection unit (C).

2. The coal body inhibition mechanism research system based on in-situ monitoring of micro-components according to claim 1, characterized in that: The infrared sample chamber (3) is connected to the optical fiber transmission component (4) through a heat-insulated pipe. The chromatographic sample chamber (12) is connected to the chromatographic separation element (13) through a heat-insulated pipe. The electron paramagnetic resonance cavity (16), the probe system (7), the electromagnetic microwave system and the electronics system (10) are also connected in sequence through heat-insulated pipes. The heat-insulated pipes are made of stainless steel.

3. The coal body inhibition mechanism research system based on in-situ monitoring of micro-components according to claim 2, characterized in that: A one-way valve (15) is provided on the insulated pipeline between the chromatographic sample chamber (12) and the chromatographic separation element (13).

4. The coal body inhibition mechanism research system based on in-situ monitoring of micro-components according to claim 2, characterized in that: The infrared sample chamber (3) is made of quartz material, and the magnetic shield (7) is made of super metal or high magnetic permeability alloy.

5. The coal body inhibition mechanism research system based on in-situ monitoring of micro-components according to claim 1, characterized in that: The programmed heating reaction chamber (14) is made of 316L stainless steel and is heated by a non-magnetic heating wire, which is a uniform double-wound non-magnetic coil.

6. A quantitative method for coal body inhibition mechanism based on in-situ monitoring of micro-components, characterized in that: The coal body inhibition mechanism research system based on in-situ monitoring of micro-components as described in any one of claims 1-5 includes the following steps: S1. Preparation and processing of multiple samples; Raw coal samples were selected as the control group, and coal samples after inhibition treatment were selected as the uncleaned inhibition group. Another portion of the inhibited coal samples were cleaned using supercritical CO2 cleaning technology to remove residual inhibition materials, resulting in an experimental group that retained only the chemical effect, thus forming a three-gradient sample group. S2. Synchronous monitoring and data acquisition; The three groups of samples were placed in the programmed temperature reaction chamber (14) and heated according to the set program. The infrared sample chamber (3), the chromatographic sample chamber (12) and the electron paramagnetic resonance resonant cavity (16) were heated synchronously. The infrared detection unit (A) captured the changes in the characteristic absorption peaks of functional groups in real time, the electron paramagnetic detection unit (B) recorded the fluctuations in the number of free radicals, and the gas chromatographic detection unit (C) analyzed the components and contents of the gases released at different temperature ranges. The three units respectively transmitted the monitoring data to the central control system (1). The central control system (1) processed the data and generated a temperature-functional group-free radical-gas linkage evolution cloud map. S3. Quantitative analysis of inhibition effect; Based on the oxidation reaction kinetic model, by comparing the monitoring data of the three-gradient sample groups and analyzing the differences between the unwashed inhibition group and the control group, the total effect of physical and chemical inhibition was obtained; by comparing the differences between the experimental group and the control group after washing, the chemical inhibition effect was quantified separately; the difference in inhibition rates between the two inhibitors is the contribution rate of physical inhibition, achieving precise separation and quantification of physical and chemical inhibition effects; the formula for calculating the inhibitor inhibition rate is:

7. In the formula, R is the inhibition rate of the inhibitor, %; A is the volume fraction of CO produced by raw coal at a certain temperature, 10 -6 B represents the volume fraction of CO produced by coal samples treated with different inhibitors at the same temperature, 10 -6 .

8. The method for quantifying coal body inhibition mechanism based on in-situ monitoring of micro-components according to claim 6, characterized in that: During the monitoring process, if the pipeline temperature is abnormal, the operation of the corresponding device is suspended and the data is collected again after the operation is restored; if a device fails, the faulty device is isolated and the time point is recorded. After the fault is eliminated, the remaining data is interpolated to complete the data; after the experiment is completed, inert gas is introduced into the programmed temperature rise reaction chamber (1) for purging.

9. The method for quantifying coal body inhibition mechanism based on in-situ monitoring of micro-components according to claim 6, characterized in that: After selecting coal samples, they were first crushed and screened through a standard sieve to obtain uniform particles of 0.25-0.5mm. Then, the screened coal samples were placed in a 105℃ constant temperature drying oven and dried to constant weight. During the drying process, the difference between two weighings was controlled to be ≤0.1g. The dried coal samples were divided into three graded sample groups of 50g / part. The unwashed inhibition group was soaked in a 10% MgCl2 inhibitor solution for 2 hours and air-dried to constant weight, retaining the inhibitor on the surface and in the pores of the coal sample to form a state in which physical and chemical inhibition coexist. The experimental group took coal samples with the same inhibition treatment and removed the physical residual inhibitor using supercritical CO2 technology with a pressure of 22MPa, a temperature of 32℃, a CO2 flow rate of 1L / min, and a washing time of 35min. After drying, the samples were sealed for later use.

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