Underground coal gasification poly-generation closed operation technology

Abstract

The invention relates to crude coal gas separation processing production generated by coal gasification through an ultra-deep technology for deep (800-3000m) underground coal gasification by adopting a shallow underground coal gasification technology and a straight well and horizontal well combined technology in the underground coal gasification technology so as to achieve a zero emission technology, in particular to an underground coal gasification poly-generation closed operation technology. The underground coal gasification poly-generation closed operation technology is characterized in that underground coal gasification is adopted to infuse a compound into an underground coal layer for repeated use through steam by a poly-generation engineering technology so that ash of pollutants is reserved on ground to achieve zero emission. By adopting the underground coal gasification zero emission technology, part of the pollutants are reserved on the ground by a recycling technology, thus really achieving no pollution zero emission of tail gas, environmental protection, energy conservation, three-dimensional science, energy utilization maximization and rationalization, and sustainable energy use.

Description

technical field [0001] The invention relates to the separation and processing of raw coal gas produced by ultra-deep coal gasification using shallow coal gasification technology combined with vertical wells and horizontal wells in underground coal gasification technology to carry out deep (800-3000 meters) coal gasification Production, to achieve zero tail gas emission technology, especially: underground coal gasification polygeneration closed operation technology. Background technique [0002] At present, coal gasification in coal fields can definitely reduce the major environmental pollution caused by coal mining and reprocessing; at present, in my country, more than 1 trillion tons of deep coal fields below 1,000 meters are basically in the stage of unmining, and no one has conducted research and development, and there is no underground coal gasification technology in deep coal; therefore, I invented an ultra-deep coal underground gasification technology. Since this techno...

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Problems solved by technology

[0002] At present, coal gasification in coal fields can definitely reduce the major environmental pollution caused by coal mining and reprocessing; at present, in my country, more than 1 trillion tons of deep coal fields below 1,000 meters are basically in the stage of unmining, and no one has conducted research and development, and there is no underground coal gasification technology in deep coal; therefore, I invented an ultra-deep coal underground gasification technology. Since this technology is a new cutting-edge technology, I have applied for an invention patent, among which: coal underground gasification The main component of crude gas produced is H 2 , carbon dioxide, CO, CH -4 and steam, the ratio of each component depends on the type of coal, gasification agent, required components and gasification effect

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