Tapered distribution plate structure type gas-solid fluidized bed separation device and method

Abstract

The invention discloses a tapered distribution plate structure type gas-solid fluidized bed separation device and method, and belongs to the technical field of coal dry separation. The device is composed of a fluidized bed body which is vertically arranged, a feeding and medium filling chute and a pushing wheel which are arranged on the upper portion of the fluidized bed body and an air chamber, an air distribution plate, an air inlet pipe and a discharge valve which are arranged on the lower portion of the bed body, and the air distribution plate is arranged in the air chamber and is in a tapered shape. Compressed air is introduced into the air chamber arranged on the lower portion of the fluidized bed body through the air inlet pipe, the compressed air enters the device from the V-shapedinverted-tapered-shaped air distribution plate, vertically moves upwards in a bundling mode and is evenly distributed in the fluidized bed body, therefore, media in the fluidized bed body is fluidized, and a stable fluidized environment is formed; and upgraded clean coal and separated gangue are obtained from raw coal through the effect of the fluidizing media in the fluidized bed body. The tapered distribution plate structure type gas-solid fluidized bed separation device and method are simple in structure and convenient to use, can effectively solve the problem that holes, channels and deadbeds are generated in a bed layer due to the fact that air in the fluidized bed body is distributed unevenly and are suitable for being used and popularized.

Description

technical field [0001] The invention relates to a conical distribution plate structure type gas-solid fluidized bed sorting device and method, especially suitable for dry sorting of coal in water-deficient areas in the west, and also suitable for dry sorting of industries such as energy, chemical industry, and materials . Background technique [0002] Two-thirds of my country's recoverable coal reserves are distributed in the arid and water-scarce regions of the west. Research on efficient dry coal preparation technology plays a key role in the deep processing and utilization of my country's coal resources. In the process of coal separation by gas-solid fluidized bed, the gas flows through the gas distribution plate to push the solid phase and the weight to form a gas-solid fluidized bed with fluid-like properties and a certain density. Therefore, the gas distribution device is an important part of the fluidized bed, and the uniformity of gas distribution is a key factor af...

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Problems solved by technology

Therefore, the gas distribution device is an important part of the fluidized bed, and the uniformity of gas distribution is a key factor affecting the mixed flow of gas-solid two-phase in the gas-solid fluidized bed, which in turn affects the separation effect.

The porous gas distribution plate of a conventional fluidized bed is arranged horizontally according to the shape of the fluidized bed, and the gas flow is easy to gather in the center of the bed, and the change of particle concentration is mainly concentrated in the central area of ​​the bed, making it easy to form dead corners and dead ends near the wall of the bed. The stagnation zone affects the mixing of gas-solid two phases, thus affecting the separation accuracy

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