Pulse fluidization-based integrated de-ashing and dehydrating method and equipment of brown coal

Abstract

The invention provides a pulse fluidization-based integrated de-ashing and dehydrating method and equipment of brown coal, belonging to the integrated de-ashing and dehydrating method and equipment of brown coal. The method comprises the following steps that a pulse air flow generating and controlling system automatically carries out feedback control in real time by a PLC (Programmable Logic Controller) aiming at properties of dried and sorted materials in a sorting bed body and product indexes; in the sorting bed body, the to-be-sorted material first enters into a pulse hot wind drying section to dry and extract mass under the hot wind effect of a large air flow at a higher temperature, materials enter into a pulse cold wind sorting section under the effect of scraper conveyers which are parallely arranged up and down inside, and light and heavy products sorted and layered are respectively conveyed to fine coal and gangue discharge openings of a sorting machine; floats and hypostasis at corresponding discharge openings are respectively discharged through a light product discharge wheel and a heavy product discharge wheel; and at the discharge openings, media in the sorted light and heavy materials are removed and purified and recycled, and dried and sorted vapor and dust containing air is purified and circulated through a subsequent dedusting process.

Description

technical field [0001] The invention relates to an integrated method and equipment for deashing and dehydrating lignite, in particular to an integrated method and equipment for deashing and dehydrating lignite based on pulsating fluidization. Background technique [0002] my country's lignite resource reserves are abundant, but its mining and processing utilization is low. The characteristics of high ash and high moisture content of lignite determine that lignite must be upgraded by deashing and dehydration before use; lignite is easy to muddy when exposed to water, which determines that traditional wet coal preparation technology is not suitable for lignite deashing process. The existing dehydration and upgrading technology of lignite can only realize the removal of part of the moisture of lignite, and cannot play the role of coal separation; the existing wet coal preparation technology can not play the role of deashing and dehydration of lignite. Contents of the inventi...

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The purpose of the present invention is to provide an integrated method and equipment for lignite deashing and dehydration based on pulsating fluidization, so as to solve the problem that the existing wet coal preparation technology cannot deash and dehydrate lignite

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