Test device and method for simulating in-situ underground coal gasification

Abstract

The invention discloses a test device and a test method for simulating in-situ underground coal gasification. The test device comprises a gasifying furnace body, a top cover, a furnace wall injection pipe, a furnace wall exhaust pipe, a gasifying agent preparing unit, an injection pipeline, an exhaust pipeline, a gas flow meter, a gas pressure meter, a gas temperature measuring thermocouple, a gas purifying unit, a gas dispersing unit, an inside-furnace temperature monitoring unit, a gas chromatograph, an igniter, a displacement meter, a filling unit and a computer, wherein the outer shape of the gasifying furnace is cylindrical; the wall of the gasifying furnace comprises a steel plate, a common brick layer, an insulation material, a water jacket layer and a refractory brick layer from outside to inside sequentially, The test device is reasonable in structure and multifunctional, and can utilize instruments to objectively and actually measure temperature fields in a coal seam and a roof rock stratum, gasifying agent ratio and gas production index parameters, overlaying rock movement and ground surface subsidence parameters, and gasifying furnace cavity-growth characteristic parameters, and facilitate research on furnace structure parameters and a gasifying process, so as to determine in-situ underground coal gasification process parameters and an in-situ underground coal gasification production scheme, which are suitable for on-site conditions.

Description

technical field [0001] The invention relates to the technical field of underground coal gasification, in particular to a test device and method for simulating in-situ underground coal gasification. Background technique [0002] Underground coal gasification technology (Underground Coal Gasification, UCG) is the use of chemical mining methods to directly burn and gasify coal in situ underground to produce combustible gas. It is a new technology for high-carbon resources and low-carbon development of clean energy. Coordinated coal green mining technology. Underground coal gasification combines the three processes of well construction, coal mining and gasification into one. Due to its advantages of low gas production cost, high safety and good environmental benefits, it has received extensive attention worldwide. The former Soviet Union , Europe, the United States, Japan, Australia, China and many Asian countries have carried out a large number of theoretical research and indu...

AI Technical Summary

Problems solved by technology

At present, there is a lack of simulation test devices suitable for the underground coal gasification process, and the existing test devices have not realistically simulated the occurrence conditions of the gasified coal seam and the surrounding rock conditions of the roof and floor

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