A multi-stage sedimentation rakeless concentration device

Abstract

The invention relates to a multi-stage sedimentation rakeless concentration device, which includes a central tank body, and a flow diversion settlement area is arranged outside the center tank body, and the flow diversion sedimentation area includes an annular flow diversion sedimentation screen and a magnetic gathering spray The said annular diversion sedimentation screen includes an annular groove spirally arranged around the central groove body, said annular groove is arranged with a second turbulence partition in sequence along the length direction, and the lower bottom plate of said annular groove is also provided with The second underflow discharge port, under several second underflow discharge ports, there are second inclined plate diversion discharge pipes, and the outlets of all the second inclined plate diversion discharge pipes are collected into the second underflow discharge pipe, and the sedimentation The final water is discharged from the second overflow discharge pipe arranged at the end of the annular groove. The diversion settlement area in this device includes an annular diversion sedimentation sieve and a magnetic gathering sprinkler, wherein the second turbulence partition is used in the annular diversion sedimentation sieve to realize step-by-step settlement, and the fine coal slime and the settled water Drain from a different tube to achieve concentration.

Description

technical field [0001] The invention relates to the field of coal slime water treatment, in particular to a multi-stage subsidence rakeless thickening device. Background technique [0002] In the coal washing process, the slime water treatment, as the finishing link of the washing process, is the key to the effective collection and utilization of coal slime and the closed cycle of washing water, and the thickening device as the carrier of coal slime water treatment and the key equipment for processing has been obtained It is widely used and is of great significance to the closed circulation of washing water, the full utilization of underflow concentrate and environmental protection. [0003] With the integration and large-scale of coal washing plants, the processing capacity has been greatly increased, and the output of coal slime water and the content of fine slime in coal slime water have also increased significantly. Some equipment has reached the specifications of 45m a...

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Problems solved by technology

[0003] With the integration and large-scale of coal washing plants, the processing capacity has been greatly increased, and the output of coal slime water and the content of fine slime in coal slime water have also increased significantly. Some equipment has reached the specifications of 45m and above, but due to the finer fine mud and the increase in processing capacity, the settlement time period is poor, and the settlement effect is poor. The fine mud in the washing circulating water cannot be effectively removed, which will cause coal The quality of washing is seriously affected, so many coal preparation plants have added two-stage concentration or even three-stage concentration to further purify the washing circulating water, which will take up a lot of land, and there are still residual flotation stages in the slime water that have not been completely The recovered coal foam, resulting in the waste of clean coal, resulting in economic losses

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