Efficient multistage sedimentation rake-free concentration device

Abstract

The invention relates to an efficient multistage sedimentation rake-free concentration device which comprises a central tank body, a flow guide sedimentation area is arranged on the outer side of thecentral tank body, and the flow guide sedimentation area comprises a layer-falling flow guide sedimentation screen and a magnetism gathering sprayer. The layer-falling flow guide sedimentation screencomprises a plurality of third flow guide sedimentation subgroups which are sequentially arranged downwards along the outer wall of the central tank body, in every two adjacent settling tanks, the settling tank at the lower part obtains slime water flowing out of the previous settling tank, and each third flow guide sedimentation subgroup comprises one settling tank; and a third underflow discharge port for discharging settled fine coal slime is formed in a bottom plate of each settling tank, and water after complete settling is output from a third overflow discharge pipe at the output end ofthe lowermost third flow guide sedimentation sub-group. According to the invention, the flow guide settling area uses the layer-falling flow guide settling screen and sequentially passes through all the third flow guide sedimentation subgroups, so that step-by-step settling is realized, fine coal slime and settled water are discharged from different pipes, and concentration is realized.

Description

[0001]This application claims the divisional application of the application number 201911283929.9 for "a multi-stage sedimentation rake-free thickening device including a stratified diversion sedimentation screen" filed on December 13, 2019, and the original acceptance agency is in China.Technical field[0002]The invention relates to the field of slime water treatment, in particular to an efficient multi-stage sedimentation rake-free thickening device.Background technique[0003]In the coal washing and processing process, the slime water treatment is the final link of the washing process, which is the key to the effective collection and utilization of slime and the closed-circuit circulation of the washing water. The thickening device has been used as the carrier of the slime water treatment and the key equipment for treatment. The wide application is of great significance to the closed circulation of washing water, the full utilization of underflow concentrate and environmental protec...

AI Technical Summary

Problems solved by technology

[0004] 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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