Slurry water flocculation treatment mixer and its application

Abstract

The present invention provides a mixer used for the slime water flocculation treatment process of coal preparation plant. The mixer of the present invention comprises a shell; wherein a first level impeller and a second level impeller which are driven by a motor are arranged inside of the shell; one side of the shell is provided with a slime water inlet and a flocculant feeding port, and the other side of the shell is provided with a slime water outlet; the first level impeller is adjacent to the slime water inlet, and the second level impeller is adjacent to the slime water outlet; the flocculant feeding port is connected between the first level impeller and the second level impeller through pipeline; the flocculant feeding port is provided with a pipeline which is connected to the slime water inlet and is provided with a valve. The mixed of the present invention is capable of improving the flocculation effect, obviously improving the water output effect of the concentrator, perfecting the slime water flocculation treatment process of coal preparation plant, setting nicer base for the coal washing with clear water and the closed circuit of wash water of coal preparation plant, and having a wide popularization and application prospect.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a mixing device used in the coal slime water flocculation treatment process in a coal preparation plant. Background technique [0002] Coal slime water is industrial wastewater produced during the coal preparation process, which contains a large number of coal particles and muddy particles, and also contains copper, iron, lead, zinc, cadmium, arsenic and other components. In order to reduce environmental pollution and make full use of For water resources, coal slime water must be effectively treated to achieve a closed-circuit cycle of clean water washing coal and washing water to meet process requirements and improve separation efficiency. [0003] Generally, the slime water in the coal preparation plant is directly discharged into the thickener or the slime sedimentation tank for sedimentation treatment, and the clarified water is recycled. Since the fine slime particl...

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Problems solved by technology

The disturbance intensity of the stirring is high, and the turbulent degree of the water increases, which is beneficial to the uniform dispersion of the agent and the mutual contact with the solid particles, but at the same time, the shear velocity is increased, which breaks the molecular chain of the flocculant and reduces the chain length, resulting in a weakened bridging

Prolonging the disturbance time also provides an opportunity for the uniform dispersion of the agent and the contact of the solid particles, but if the disturbance time is too long, the flocs generated may be re-shattered due to their low mechanical strength and low shear resistance, which will affect the flocculation effect

There is currently no mixing device dedicated to flocculation

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