Grille-type flocculating settling device and construction method thereof

Abstract

The invention discloses a grille-type flocculating settling device and a construction method thereof. The grille-type flocculating settling device comprises a setting tank; a flocculating unit is arranged at the center of the settling tank; the top of the settling tank is externally connected with an overflow water collecting tank; the flocculating unit comprises a water distributing funnel, a water distributing grille and a flocculating grille; the water distributing funnel, the water distributing grille and the flocculating grille are connected in series from top to bottom. The device utilizes small-diameter grids to enhance small eddy generation so as to benefit collision flocculation of particles; meanwhile, by continuously regulating a distance between the grids, a velocity gradient of water flow is gradually reduced, so that crushing of a flocculating constituent can be effectively avoided; by adopting the device to carry out flocculating settling, the large flocculating constituent can be rapidly formed in short time and settling separation is timely carried out, so that flocculating settling efficiency is effectively improved; when the device is utilized to replace a conventional concentrator for carrying out flocculating settling of slime water, an occupied area of equipment can be reduced and investment and operation cost can be reduced.

Description

technical field [0001] The invention relates to a settling device, in particular to a grid-type flocculation settling device and a construction method thereof, which are suitable for the field of water treatment, especially for coal slime water flocculation settling of tailing coal in a coal preparation plant. Background technique [0002] Flocculation and sedimentation is an important step in sewage treatment. Conventional flocculation devices can be divided into hydraulic flocculation reactors and mechanical flocculation reactors. Hydraulic flocculation reactors are energy-saving and easy to maintain, and are widely used. Traditional hydraulic flocculation reactors mainly have Plate type, folded plate type, grid type, grid type, etc. These reactors usually have a uniform velocity gradient. Although the velocity gradient can be changed by cascading and cascading, the change is not timely, and cascade flow will increase the uncontrollable rate of floc fragmentation. Factors ...

AI Technical Summary

Problems solved by technology

[0002] Flocculation and sedimentation is an important step in sewage treatment. Conventional flocculation devices can be divided into hydraulic flocculation reactors and mechanical flocculation reactors. Hydraulic flocculation reactors are energy-saving and easy to maintain, and are widely used. Traditional hydraulic flocculation reactors mainly have Plate type, folded plate type, grid type, grid type, etc. These reactors usually have a uniform velocity gradient. Although the velocity gradient can be changed by cascading and cascading, the change is not timely, and cascade flow will increase the uncontrollable rate of floc fragmentation. Factors lead to poor flocculation effect. In addition, the flocculation and sedimentation or air flotation stages of water treatment are usually separated. Therefore, water flowing in connected pipes or open channels will increase the flocculation time and cause negative effects such as floc fragmentation.

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