High-low-temperature high-pressure adsorption and desorption testing device and method

Abstract

A high-low-temperature high-pressure adsorption and desorption testing device comprises an inflation system, a deflation system, an adsorption system, a desorption system, a temperature control system and a data collection system. The inflation system comprises a methane inflation unit and a helium inflation unit. The deflation system comprises a vacuum pump, a vacuum container and a vacuum gauge. The temperature control system comprises a high temperature unit and a low temperature unit. The adsorption system comprises a high temperature adsorption unit and a low temperature adsorption unit. The desorption system comprises a water drainage metering device, an electronic scale and a desorption gas flowmeter. The data collection system comprises a computer and a control unit. According to the high-low-temperature high-pressure adsorption and desorption testing device, test operations are easy and convenient, the test precision is high, adsorption and desorption tests under different pressures on the high-temperature and low-temperature conditions can be simulated respectively, real-time, accurate and automatic collection of test data is achieved, the more reliable data basis is provided for research on coal gas absorption and desorption rules, and the great practical significance is achieved for efficient gas exhausting, mining and utilization.

Description

technical field [0001] The invention belongs to the technical field of gas adsorption and desorption test devices, and in particular relates to a high-low temperature, high-pressure adsorption and desorption test device and method. Background technique [0002] Coalbed methane is produced in the coal-forming process and is mainly stored in the coal seam in the state of adsorption. With the increase of coal seam mining depth, the occurrence characteristics of microporosity, low permeability and high adsorption of gas-bearing coal seams are becoming more and more apparent. In the process of co-mining coal and gas, coal mine safety accidents and energy waste caused by difficult gas extraction plague the production of coal mines. Therefore, simulating the storage environment of deep coal seams, conducting adsorption and desorption experiments, and exploring the mechanism of gas adsorption in coal seams have important theoretical significance for the prevention and control of ga...

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Problems solved by technology

[0004] At present, the published patent documents "High-pressure isothermal adsorption test device for coal" (CN202502025U), "gas adsorption and desorption test device for coal samples under variable pressure conditions" (CN203705293U), "a gas adsorption and desorption test device" (CN103033442A), etc. , all adopt the heating method of water bath, and experiments under room temperature cannot be carried out; "A high-temperature and high-pressure adsorption and desorption device and its use method" (CN104062204A) adopts the heating method of constant temperature oil tank with silicone oil as the medium, and the experimental environment is harsh and the operation is complicated , the adsorption-desorption experiment at low temperature cannot be carried out

Moreover, the automation degree of the above-mentioned device is low, the pressure range that can withstand is small, the airtightness is insufficient, the amount of experimental samples that can be carried out at the same time is small, and the experimental efficiency is low

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