Coal gangue pyrolysis gasifying method

A technology of pyrolysis gasification and coal gangue, which is applied in the petroleum industry, the manufacture of combustible gas, and the heating of coke ovens, etc., and can solve the problems of environmental pollution, accumulation and occupation of land, and poor disposal.

Active Publication Date: 2014-12-24
SHANXI XINLI ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Coal gangue pyrolysis gasifying method
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  • Coal gangue pyrolysis gasifying method

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Embodiment Construction

[0032] The specific embodiment of the comprehensive utilization of coal gangue pyrolysis gasification of the present invention is mainly introduced in detail below.

[0033] Part 1 Particle Size Control of Coal Gangue

[0034] The coal gangue is processed and crushed into a particle size of 0-20 mm, and the crushed coal gangue is dehydrated and dried within this particle size range, and the drying is sufficient and the dehydration efficiency is high, but this does not constitute a limitation on the coal gangue required by the present invention.

[0035] Part II Humidity Control and Dehydration of Coal Gangue

[0036] The waste coal gasification produced by coal gangue high temperature pyrolysis and water gas reaction is recovered and purified, and the hot waste gas generated after combustion of clean coal gas is used for humidity control and dehydration of crushed coal gangue pellets before being put into the furnace.

[0037] In order to keep the environment clean and tidy, ...

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Abstract

The invention discloses a coal gangue pyrolysis gasifying method which specifically comprises the following steps of: (1) performing alternate combustion and heat-storage heat-exchange combustion of the purified gas to supply a heat source to the pyrolysis of coal gangue; (2) performing a water-gas reaction through the contact between the charcoal in a solid product of the pyrolysis of coal gangue and the superheated water vapor to generate water gas; (3) heating water by the afterheat of the solid product generated after the pyrolysis gasification of coal gangue to form water vapor; and (4) enabling the water vapor to come into contact with the solid product generated after the pyrolysis gasification of coal gangue to form superheated water vapor so that the water-gas reaction can be continuously performed. According to the method disclosed by the invention, the clean gas obtained by recovering and purifying the raw gas generated by the pyrolysis gasification of coal gangue is burnt to provide a heat source to the pyrolysis gasification of coal gangue; water vapor is generated by use of the residual heat of the solid product after the pyrolysis gasification of coal gangue, and superheated water vapor is generated through direct contact between the water vapor and the solid product; and the continuous and sufficient water-gas reaction is promoted, and the energy consumption and cost are reduced.

Description

technical field [0001] The invention relates to coal gangue pyrolysis gasification technology, in particular to a coal gangue pyrolysis gasification device. 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 7-15%. Pyrolysis and gasification of coal gangue to obtain oil and gas products and 70-80% solid products (components are silicon dioxide, aluminum oxide, ferric oxide, titanium d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/60C10J3/66C10J3/82C10J3/20C10J3/84C10J3/80C10B21/10C10B21/12
Inventor 王新民
Owner SHANXI XINLI ENERGY TECH
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