Netted rope-combing sedimentation tank

Abstract

The invention belongs to the technical field of the process for treatment in water supply and drainage, particularly the treatment of sediment in water supply and drainage projects, more particularly a netted rope-combing sedimentation tank comprising a sedimentation tank, wherein flow-homogenizing netted ropes are arranged on the cross-section of the water inlet at the front end of the sedimentation tank; N ways of front netted ropes are arranged behind the flow-homogenizing netted ropes at the front end of the sedimentation tank; pyramidal collecting hoppers are respectively arranged at the bottom of the sedimentation tank between the flow-homogenizing netted ropes and a first layer of front netted ropes and between two adjacent layers of front netted ropes, and discharging pipes are mounted at the bottom of the pyramidal collecting hoppers; and the sedimentation tank is generally provided with four layers of front netted ropes, and 1 to 2 layers of middle netted ropes are arranged on the cross-section of the middle part of the sedimentation tank. By substituting the flow-homogenizing netted ropes for a water-inlet perforated wall at the front end of the sedimentation, the invention can reduce the construction cost by 10% and reduce the energy consumption by 30%; by adding the front netted ropes to the sedimentation area at the front part of the sedimentation tank, the invention can increase the capacity utilization coefficient of the sedimentation tank by more than 10%; and by adding the middle netted ropes to the middle part of the sedimentation tank, the invention can effectively prevent the sedimentation tank from being affected by turbulent burst and other natural factors and improve the operating efficiency of the sedimentation tank.

Description

technical field [0001] The invention belongs to the technical field of water supply and drainage treatment technology, in particular to the sedimentation treatment of water supply and drainage engineering, in particular to a net rope comb flow sedimentation tank. Background technique [0002] Sedimentation is an important process for separating solid particles in water. Sedimentation tanks are widely used in water purification of feed water and water quality treatment of rainwater. The advection sedimentation tank plays an important role in the sedimentation treatment of water quality because of its simple structure, low cost and convenient management. In general sedimentation tanks, in order to distribute the water flow and the solid particles carried evenly on the cross-section of the sedimentation tank, a water inlet perforated wall should be installed at the water inlet of the sedimentation tank, and the water inlet perforated wall is generally made of reinforced concret...

AI Technical Summary

Problems solved by technology

This not only increases the head loss of the water distribution, but also easily breaks the flocs and deteriorates the sedimentation effect, and also affects the sedimentation efficiency due to the hydraulic disturbance of the orifice jet.

[0003] The advection sedimentation tank also has disadvantages such as poor water flow uniformity, serious short-circuit retention, unsatisfactory sedimentation effect, and low volume utilization rate.

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