Nuclear magnetic high-pressure isothermal adsorption device

Abstract

The invention discloses a nuclear magnetic high-pressure isothermal adsorption device. The nuclear magnetic high-pressure isothermal adsorption device comprises an air supply system, a pressure adjusting system, an isothermal balance system and a nonmagnetic nuclear magnetic cavity testing system, wherein the air supply system is used for supplying first gas and second gas; the pressure adjusting system is used for adjusting the pressure of the first gas and the pressure of the second gas; the isothermal balance system is used for utilizing the first gas to carry out an air tightness test at a preset temperature, vacuumizing a part of the first gas after the air tightness test and then receiving the second gas so as to balance the pressure and the temperature of the first gas and the pressure and the temperature of the second gas; the nonmagnetic nuclear magnetic cavity testing system is used for carrying out nuclear magnetic resonance on the first gas and the second gas after the pressures and the temperatures are balanced to test the adsorbing capacity of gas. The nuclear magnetic high-pressure isothermal adsorption device aims to solve the problems, in the prior art, that an experiment measuring area is deeply influenced by a room temperature environment, the temperature fluctuation is great, the test result is unstable and the experimental accuracy is poor and the problem that an existing isothermal adsorption experiment measuring tank is incapable of being used for measuring nuclear magnetic resonance.

Description

technical field [0001] The invention relates to the technical field of adsorption devices, in particular to a nuclear magnetic high-pressure isothermal adsorption device. Background technique [0002] Coalbed methane and shale gas mainly exist in the state of adsorption. In the field of exploration and development of coalbed methane and shale gas, the real simulation of methane adsorption under high temperature and high pressure conditions is of great significance for reservoir evaluation, reserve estimation and development effect evaluation. . [0003] At present, the method for measuring the methane adsorption capacity of coal mainly adopts "High-pressure isothermal adsorption test method of coal-volume method" (GB / T 19560-2004). In this method, the methane adsorption volume under typical adsorption pressure is measured, and then the theoretical adsorption amount of methane (that is, the Langer volume) is obtained by fitting the Langer equation. The conventional methane ...

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of nuclear magnetic high-pressure isothermal adsorption device, to solve the existing experimental measurement area in the prior art as a magnetic environment, which will interfere with the measurement of low-field nuclear magnetic resonance measurement results; Large fluctuations, unstable test results, and poor experimental accuracy; and the technical difficulty that existing technologies cannot simultaneously perform low-field NMR analysis and methane isothermal adsorption

Images