Backflow type multistage sedimentation rake-free concentrating device

Abstract

The invention relates to the field of slime water treatment, in particular to a backflow type multistage sedimentation rake-free concentrating device. The device comprises a feeding assembly, a diversion assembly and a clean coal collecting assembly, the diversion assembly further comprises a central tank body, coal slime water with a medicament flows from the upper part of the central tank body to the inner side wall of the central tank body through the feeding assembly, then the coal slime water and the medicament pass through the diversion assembly to flow towards the middle portion of thecentral tank body, after reaction, bubbles carry fine coal slime to move upwards into the clean coal collecting assembly, the clean coal collecting assembly is located above the outlet of the diversion assembly, and is sequentially provided with a central material collecting area, a bubble removing area and a diversion settling area from the middle portion to outside. The backflow type multistagesedimentation rake-free concentrating device has the advantages that the structure of a traditional multi-stage concentration tank is integrated, and the occupied area of the traditional multi-stage concentration tank is greatly reduced.

Description

technical field [0001] The invention relates to the field of coal slime water treatment, in particular to a reverse flow multi-stage sedimentation 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 specifi...

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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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