Reducing sorting fluidized bed with built-in inclined plate

Abstract

The invention discloses a reducing sorting fluidized bed with a built-in inclined plate and a coarse slime sorting system comprising the reducing sorting fluidized bed with the built-in inclined plate, wherein the sorting fluidized bed mainly consists of a bottom flow tube, an electric valve, a tapered section, a PID controller, a fluid distributor, a fluid distributor section, a pressure sensor, a straight tube section, a first reducing section, a second reducing section, inclined plates which are arranged symmetrically, an overflow slot and a feeding funnel. The equipment has a unique reducing structure, and sorting precision according to density of the sorting fluidized bed is improved by utilizing a relationship between rising water flow speed and bed-layer porosity; the inclined plates are additionally arranged at a second reducing section, and are utilized to promote settling of particles, so that pollution, on clean coal, of high-density fine particles is reduced, and processing capacity of the conventional sorting fluidized bed is improved; and an overflow area of the feeding tube of the equipment is gradually increased from top to bottom, so that the feeding flow speed and impact of feeding flow on the fluidized bed layer are reduced, and therefore, stability of the liquid-solid fluidized bed layer is favorably kept.

Description

technical field [0001] The invention belongs to the field of material separation technology and equipment, and specifically relates to a variable-diameter separation fluidized bed with a set of inclined plates arranged inside. The device is mainly used for the separation of coarse coal slime, and can also be used for the separation of other fine-grained materials. Background technique [0002] Due to its good separation effect, the separation fluidized bed has been widely concerned in the field of coal preparation for a long time, and has a large number of industrial applications. Its basic working principle is: the selected materials form a fluidized bed under the action of the rising water flow, and the light and fine particles interfere with the settling end velocity is small, and cannot pass through the fluidized bed and are brought to the overflow collection tank by the rising water flow; coarse and heavy particles The interference settling speed is relatively high, and...

AI Technical Summary

Problems solved by technology

As a kind of water medium separation equipment, the separation accuracy is lower than that of dense medium separation, and the particle size effect has a more significant impact on the separation process.

Therefore, the underflow of a traditional sorting fluidized bed often contains a certain amount of low-density coarse particles, while the overflow is mixed with more high-density fine particles, causing the underflow to be coarse and the ash content of the overflow product to be high.

[0004] In addition, in the sorting fluidized bed, the feed flow and the rising water flow flow in opposite directions, resulting in the impact of the feed flow on the fluidized bed and affecting the stability of the fluidized bed, and the selected materials with a large downward axial velocity It is not easy to disperse quickly in the separator, which is not conducive to the formation of a stable fluidized bed

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