Water-gas reaction method employing pyrolysis gasification of coal gangue

Abstract

The invention discloses water-gas reaction method employing pyrolysis gasification of coal gangue. The method comprises the following specific steps of: (1) introducing water vapor in a steam pocket into a high-temperature cooling chamber and a low-temperature cooling chamber of a material cooling device, enabling the water vapor to directly contact with solid after pyrolysis gasification to form overheat water vapor when the solid after pyrolysis gasification is cooled; (2) feeding the overheat water vapor to a pyrolysis gasification chamber to contact with a high-temperature coal gangue pyrolysis material; carrying out water gas reaction to generate water gas after carbon in a solid product after pyrolysis of the coal gangue encounters the overheat water vapor; and (3) enabling the solid product after pyrolysis gasification of the coal gangue to fall into the high-temperature cooling chamber and the low-temperature cooling chamber to heat the entering water vapor to form overheat water vapor; heating the water by the afterheat of the solid product to form the water vapor; and introducing the water vapor into the steam pocket of a steam generator to supply a lot of water vapor consumed because of water gas reaction, so that the water gas reaction can be continuously carried out.

Description

technical field [0001] The invention relates to coal gangue pyrolysis gasification technology, in particular to a water gas reaction method for coal gangue pyrolysis gasification. Background technique [0002] Coal gangue - the stone selected from raw coal is the waste residue of coal preparation plants, which is not easy to deal with. In China, hundreds of millions of tons of coal gangue cannot be used every year, and it still continues to discharge about 100Mt every year. It not only accumulates and occupies land, but also It can spontaneously combust and pollute the air or cause a fire, causing serious environmental pollution. [0003] Due to coalification for hundreds of millions of years, coal gangue contains 20-30% of carbon, oil, and gas substances, of which oil and gas account for 11-15%, and carbon accounts for 7-1.5%. Pyrolysis and gasification of coal gangue to obtain oil and gas products and 70-80% solid products (components are silicon dioxide, aluminum oxide, ...

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Problems solved by technology

[0002] Coal gangue - the stone selected from raw coal is the waste residue of coal preparation plants, which is not easy to deal with. In China, hundreds of millions of tons of coal gangue cannot be used every year, and it still continues to discharge about 100Mt every year. It not only accumulates and occupies land, but also It can spontaneously combust to pollute the air or cause a fire, causing serious environmental pollution

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