Gas liquefaction experimental device and method for supercritical water-gas containing coal

Abstract

The invention discloses a gas liquefaction experimental device and method for supercritical water-gas containing coal. The device comprises a high-pressure gas supply device, a supercritical water generation device, a coal gas liquefaction device, a pressure monitoring device, and a vacuum device. The gas supply device includes a helium cylinder, a gas cylinder, a gas booster pump. The supercritical water generation device includes a supercritical medium generating kettle, a muffle furnace heater, a satellite constant-current liquid boosting pump, and a temperature sensor. The coal gas liquefaction device includes a coal reaction kettle, a second muffle furnace heater, a temperature sensor, a second spiral tube condenser, a gas sample bag, a liquid collecting tube, and an anti-blocking ultra-fine filter sieve. The vacuum device consists of a vacuum pump, a vacuum pressure gauge, and a load pressure transmitter. The pressure monitoring device consists of a high-temperature-resistant pressure gauge, a high-frequency pressure transmitter, and a safety relief valve. According to the invention, the supercritical medium generating tank and the coal gas liquefaction tank are operated separately; and deionized water is added into the supercritical medium generating kettle to study the coal gas liquefaction effect.

Description

technical field [0001] The invention relates to a supercritical water-gas liquefaction experimental device and method of gas-containing coal, belonging to the field of coal gas liquefaction. Background technique [0002] Coal in-situ gas liquefaction mining technology refers to O 2 , CO 2 and water vapor as the reaction medium, using underground coal as raw material to produce CH 4 、H 2 Such as gas fuels and olefins and other gas-liquefied chemical raw materials, so as to realize the key technology of safe, efficient, clean and comprehensive utilization of coal. The traditional gas-to-liquid conversion temperature is mostly above 1000°C, and the energy consumption and investment are relatively large. The use of supercritical water (T≥374°C, P≥22.05MPa) as the reaction medium can enable high-moisture coal to obtain high-efficiency gas-liquid conversion at a lower temperature and in a shorter period of time without drying. extensive attention of scholars. [0003] In t...

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Problems solved by technology

However, the research on supercritical water-coal-gas-liquid conversion is in its infancy, and the existing researches are still in the stage of gas-liquid conversion of non-adsorbed gasy coal by supercritical water, and there is a lack of research on gas-liquid conversion of gas-containing coal in supercritical water.

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