Coal slime water concentrator

Abstract

The invention provides a coal slime water concentrator comprising a sedimentation main body filled with coal slime water, a feeding device and a clear liquor collecting groove located at the outer side on the rim of the top of the sedimentation main body. The sedimentation main body is a cylindrical-conical body with a steel structure; a conical body angle of the conical body is 45-65 degrees; the feeding device is mounted at the upper part center position of the sedimentation main body, and comprises a main body, a feeding pipe and a discharging pipe; the feeding pipe is arranged at the middle part of the lateral wall of the main body; the upper part of the discharging pipe is arranged in the main body; the top of the discharging pipe is connected with the bottom end of a screw rod penetrating through the main body; a hand wheel is sleeved at the upper part, arranged outside the main body, of the screw rod; and the lower end of the discharging pipe is arranged at a position which is 2-3 m below a center liquid level of the coal slime water. The coal slime water concentrator disclosed by the invention uses the sedimentation main body in the steel structure; the structural parameters are easy to ensure; the smoothness of the inner wall is good; the conical angle of a conical body can be increased; the total height of the concentrator is reduced; the construction progress is rapid; the construction period is reduced; the construction is influenced by cold weather in a north cold area; and the manufacturing price of equipment is low.

Description

technical field [0001] The invention relates to sewage concentration and clarification equipment, in particular to a coal slime water concentrator for concentration and clarification of coal slime water in a coal preparation plant. Background technique [0002] More than 95% of my country's coal preparation plants are wet-process coal preparation plants. In wet-process coal preparation plants, water is the most important working medium, and the water consumption per ton of raw coal reaches 2-4m 3 ,The water used as the working medium is polluted by the fine solids in the raw coal during the washing process and becomes slime water. In order to reduce the water consumption of the coal preparation plant and realize clean production and zero discharge of waste water in the coal preparation plant, it is necessary to purify the slime water After treatment, it is reused, and the concentrate enters the subsequent solid-liquid separation operation. [0003] The thickening equipment ...

AI Technical Summary

Problems solved by technology

Among them: the rake thickener relies on the weight of the solid particles to settle freely under the action of gravity. Due to the fine particle size composition of the solid particles in the slime water, the settling speed is small, and the processing capacity is only 2.5-3.5m 3 / m 2 h, resulting in large equipment volume, large floor area, maximum specification diameter reaching or exceeding 100m, high equipment price, reinforced concrete structure for the tank body, long construction period, especially in cold regions, where normal construction cannot be carried out in winter, making the whole selection Coal plant construction period increases

The inclined tube thickener is based on the theory of shallow settlement, and adopts thin-walled porous inclined square hole tube, which has a large equivalent area and short coal slime settlement distance, and the processing capacity can reach 3.6-5.0m 3 / m 2 h, but the structure is not yet perfect, the thin-walled porous inclined square hole tube and the bottom of the tank are easy to block; the tank is large in volume and adopts reinforced concrete structure, which is difficult to construct and has a long construction period

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