A kind of coal after deep underground gasification 2 Capture and archive methods

Abstract

The invention discloses a kind of CO after deep underground gasification of coal 2 A capture and storage method, the method comprises: 1. excavating a gasification injection channel and a gasification output channel and a gasification horizontal channel connecting the two; The gasification products are output and a cavity after coal seam gasification is formed in the coal seam; three, the CO 2 It reacts with waste slurry into the cavity after CBM gasification to form precipitation; 4. Block the injection channel of waste slurry, and at the same time continuously inject CO into the cavity after CBM gasification 2 to saturation, then block the CO 2 injection channel. The invention combines coal deep underground gasification with CO 2 Combined capture and storage process to reduce CO emissions while coal gasification 2 Capture and storage, improve the capture amount and capture speed, solve the problem of filling and treatment after coal deep underground gasification, and realize the reduction of CO 2 Effective retention treatment, greatly reducing CO 2 emissions.

Description

technical field [0001] The invention belongs to the green development and utilization of coal and CO 2 The field of emission reduction, specifically relates to a CO after deep underground gasification of coal 2 Capture and archive methods. Background technique [0002] For a long time, the intensified human economic engineering activities have produced a large amount of carbon dioxide, and the large amount of carbon dioxide emission has affected the absorption and emission balance of the natural carbon cycle system, causing an increasingly serious greenhouse effect. As the world's largest carbon dioxide emitter, the development mode dominated by fossil energy is the root cause of my country's climate and environmental problems. As one of the most important energy sources in my country, coal accounts for more than 50% of my country's energy consumption and more than 80% of the country's total carbon dioxide emissions. However, based on my country's actual national conditio...

AI Technical Summary

Problems solved by technology

This method combines deep underground coal gasification with CO 2 Combining the capture and storage process, while coal gasification, the gasified coal seam is used to release CO 2 Capture and storage, so that CO 2 It is filled and sealed in the cavity after coalbed gasification with solid, liquid and gas three-phase, which improves the capture amount and capture speed, not only solves the problem of filling and treatment after deep underground coal gasification, but also realizes the CO 2 Effective retention treatment, greatly reducing CO 2 emissions, solve the CO 2 Pollution problems directly discharged into the atmosphere

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