Dry coal preparation device for fluidized bed

Abstract

The invention relates to a dry coal preparation device for a fluidized bed, which comprises a sorting chamber, a coal inlet, a sorting medium inlet, an air distributing system, a sunk coal discharging system, a float coal overflow port and an exhaust port, wherein the sunk coal discharging system comprises a plurality of sunk coal storing chambers; a sunk coal intermittent discharging valve is mounted at the bottom end of each of the sunk coal storing chambers; a row of air distributing pipes are arranged in each of the sunk coal storing chambers; a series of small air distributing holes are formed on the downside of the air distributing pipes; air distribution is realized by each air distributing chamber; and the exhaust port is connected with a side part of the coal inlet through a pipeline and utilizes exhaust to realize the primary air separation and local dry of the inlet coal. The complexity and instability of a chain transmission scraper blade device are omitted according to the dry coal preparation device for the fluidized bed; the continuous sorting and discharging for sunk and float coals are easily realized; the air distribution is uniform and stable and the coal grains are prevented from falling into an air supply system; and the dry coal preparation device for the fluidized bed has an excellent sorting effect and can simultaneously realize the dry sorting and drying process of the raw coal.

Description

technical field [0001] The invention relates to a fluidized bed dry method coal separation equipment, which belongs to a kind of dry method mineral separation equipment which applies the fluidized bed principle and fluidization technology to coal separation. Background technique [0002] my country's coal reserves and output rank among the top in the world, and for a long time to come, coal will remain my country's primary energy source. But at the same time, there are few high-quality coals in my country, uneven distribution and serious pollution from direct use, so coal sorting has become the main means of obtaining high-quality coal. In recent years, because the wet coal preparation technology is limited by factors such as uneven distribution and supply of water resources, some coal types are easy to muddy in water separation, and easy to freeze under severe cold conditions, the dry coal preparation technology has gradually developed and has been accepted worldwide. use....

AI Technical Summary

Problems solved by technology

The main disadvantage of using a chain scraper to realize the output of sinking and floating particles is that the chain scraper seriously affects the particle stratification and bed separation, resulting in a mismatch between light and heavy coal, resulting in a decline in the separation effect, and at the same time making the entire flow The chemical bed system is complex and huge and greatly reduces the stability of equipment operation

[0004] In addition, direct use of the air chamber and the traditional air distribution plate structure of the fluidized bed will cause fine coal particles to fall into the air chamber through the air distribution plate, resulting in pipeline blockage and air chamber pressure imbalance. The coal particle size and humidity range are required to be relatively high, too much fine coal particles will seriously reduce the separation effect if the accumulation of fine coal particles in the bed, and the greater the moisture, the worse the separation effect, so the dry separation bed itself can be used for coal feeding Grade Screening and Drying

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