Thermal-cycle continuous pyrolysis-gasification comprehensive device for coal gangues

Abstract

The invention provides a thermal-cycle continuous pyrolysis-gasification comprehensive device for coal gangues. The thermal-cycle continuous pyrolysis-gasification comprehensive device for coal gangues comprises a coal gangue pyrolysis-gasification furnace, a raw coke oven gas condensing device, a raw coke oven gas recycling and purifying device, a furnace coal gangue heat waste gas humidifying and dehydrating device and tail gas water-spraying purifier, wherein a raw coke oven gas guide-out device of the coal gangue pyrolysis-gasification furnace is communicated with the raw coke oven gas condensing device; and the raw coke oven gas condensing device is communicated with the raw coke oven gas recycling and purifying device. The purified raw coke oven gas is combusted; the combusted waste gas is fed to the furnace coal gangue heat waste gas humidifying and dehydrating device; and the dehydrated waste gas is exhausted through the tail gas water-spraying purifier. Besides, the combusted waste gas is fed to an active coke regenerator of the raw coke oven gas recycling and purifying device; and the waste gas regenerated by the active coke regenerator is fed to a waste gas heat exchange dehydrator or the tail gas water-spraying purifier. The thermal-cycle continuous pyrolysis-gasification comprehensive device for the coal gangues is prominent in environmental protection benefit by utilizing the pyrolysis-gasification of the coal gangues and not consuming extra energy resources, and is considerable in economic value.

Description

technical field [0001] The invention relates to coal gangue pyrolysis gasification technology, in particular to a thermal cycle continuous coal gangue pyrolysis gasification comprehensive 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, a...

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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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