Operation method of liquid-solid fluidized bed coarse slime separation device with adjustable water velocity in height direction

Abstract

The operation method of the liquid-solid fluidized bed coarse coal slime separation device with adjustable water velocity in the height direction, the coarse coal slime enters the fluidized bed cylinder evenly through the spreading plate, and the coarse coal slime particles are gradually layered according to the final settlement velocity. The low-density coarse slime particles move upward into the overflow concentrate collection mechanism and are discharged from the concentrate discharge pipe to become concentrate. The high-density coarse slime particles move downward and enter the bottom of the fluidized bed cylinder. At the same time, the fluidization is adjusted through the water discharge pipe. The concentration of coarse slime particles in the bed cylinder increases the iso-sediment ratio between coarse slime particles; the controller controls the ore discharge actuator to automatically discharge ore; the frequency converter controls the pump to control the water speed entering the water inlet pipe, and adjusts the liquid-solid flow Sorting density of coarse coal slime by fluidized bed; prolonging the separation time of coarse coal slime in fluidized bed, strengthening coarse coal slime to be sorted according to density on the whole bed height, for difficult and extremely difficult separation Coal slime has obvious advantages over traditional fluidized bed coarse slime separator.

Description

technical field [0001] The invention relates to a high-efficiency separation device for coarse coal slime, in particular to an operation method of the coarse coal slime separation device for a liquid-solid fluidized bed with adjustable water velocity in the height direction. Background technique [0002] With the increasingly severe environmental situation in our country, more and more attention has been paid to the efficient and clean separation of coal. With the further improvement of coal mining mechanization, the fine-grained coal content in raw coal is increasing, and the upper limit of fine-grained coal separation particle size is reduced with the popularization and application of flotation columns. Crude. The sorting density of lump coal increases gradually with the decrease of particle size. Low-density fine-grained coal directly enters the clean coal without sorting, resulting in the back ash of the clean coal. In this way, the coarse coal between gravity separatio...

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Problems solved by technology

However, due to the characteristics of the separation principle of the liquid-solid fluidized bed coarse coal slime separator, the high-ash fine mud in the feed will seriously pollute the clean coal. Desliming devices such as high-frequency screens and slime centrifuges, some high-ash fine mud still exists in the final clean coal, which affects the separation effect

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