Coal underground gasification simulation experiment system

Abstract

The invention provides a coal underground gasification simulation experiment system. The coal underground gasification simulation experiment system comprises a gas injection device, a coal gasification device and a gas collection and treatment device which are sequentially connected through pipelines; the coal gasification device is used for combusting and gasifying a coal sample in the coal gasification device under the simulated formation condition by using oxygen and water vapor injected by the gas injection device so as to generate synthesis gas; the gas collection and treatment device is used for purifying and separating the synthesis gas; and the side wall of a gasification container of the coal gasification device is provided with a plurality of injection-production holes located in the same horizontal plane, and the injection-production holes are used for insertion of injection-production pipes so as to supply or output the gas to the coal sample. During an experiment, the two injection-production holes can be selected according to the included angle between two horizontal wells in the horizontal direction, the injection-production pipes are inserted into the two injection-production holes respectively for the gasification simulation experiment, the condition that the coal underground gasification efficiency is highest when the included angle between the two horizontal wells in the horizontal direction is the required angle can be determined through multiple experiments, and then the included angle between the two horizontal wells is optimized.

Description

technical field [0001] The invention relates to the field of coal resource mining, in particular to an underground coal gasification simulation experiment system. Background technique [0002] Underground coal gasification (Underground Coal Gasification, referred to as UCG) is a process in which coal in the formation is directly burned in a controlled manner, and combustible gas is produced through the thermal and chemical effects of the coal. The product mainly contains combustible gas. Synthetic gas (synthetic gas) with components CH4, H2, CO. This technology integrates the three major processes of well construction, coal mining, and coal gasification. It converts traditional physical coal mining into chemical coal mining, and has good safety. The advantages of low investment, high efficiency, and less pollution have been valued by countries all over the world. It is known as the second-generation coal mining method, and is especially suitable for recovering abandoned coal...

AI Technical Summary

Problems solved by technology

However, the angle between two horizontal wells in the horizontal direction in CRIP has the highest efficiency of underground coal gasification, which has not yet been clarified.

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