Modular coal preparation process and equipment based on gas-solid diphasic stream

Abstract

The invention discloses a module type coal preparation process based on a gas-solid two-phase flow and a piece of equipment thereof, wherein, a medium solid which has wide particles and multiple components is added into a separator, dried coal is fed into the separator for separation and medium drainage, and clean coal and gangue are separated; the medium solid after medium drainage is sent back to the separator for recycling use, and according to the height and the density of a bed layer of a fluidized bed, the quantity of the medium solid in the separator is adjusted so as to guarantee separating effect. A module type equipment system which is formed by combining the separator, a feeding material feedway, a feedway of the medium solid after shunting, a magnetic substance feedway, and a dust removal and reflux feedway is adopted, and a coal preparation process for the gas-solid two-phase flow is finished by matching the module type equipment system with a medium draining screen, a belt conveyor and a bucket wheel hoist, thus the invention has simple technique, easy operation and convenient control, can guarantee the uniformity and the stability of the height and the density of the bed layer of the fluidized bed; moreover, the equipment has stable and systematic running, reliable performance and high separation precision and can continuously run for a long time, and a grid plate of the fluidized bed is easy to replace.

Description

technical field [0001] The invention relates to a dry coal preparation process and equipment, in particular to a modular coal preparation process and equipment based on gas-solid two-phase flow. Background technique [0002] There are two main methods of coal preparation. One is the water-based wet coal preparation method widely used at home and abroad. This method is difficult to effectively separate coal in arid and water-deficient regions, alpine regions, and coals that are easy to muddy. Another kind of dry separation mainly includes wind coal preparation (wind shaker, wind jigging) and air dense medium fluidized bed coal preparation. Wind coal preparation uses single-phase air as the separation medium, which is mainly used for high-density gangue removal of easy-to-separate coal, and low-density separation cannot be performed, and the separation efficiency is low. For many years, scholars at home and abroad have conducted uninterrupted research on gas-solid two-phase f...

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