Inclined plate type rotational flow sand setting system

Abstract

The invention discloses an inclined plate type rotational flow sand setting system. The system which comprises a tank, a sand lifting pipeline vertically arranged in the middle part of the tank and a sand-lifting air-distributing structure is characterized in that: the lower half part of the tank is a sand hopper part, the upper half part of the tank is a sand setting zone, and an inflow port and an outflow port are arranged on the tank; the upper end of the sand lifting pipeline is connected with a sand-water separator; the bottom surface of the sand setting zone is provided with an inclined plate precipitation structure; the tank is provided with an inner wall jet structure; the lower end of the sand lifting pipeline is provided with a sand lifting pipeline inlet structure; and the sand-lifting air-distributing structure comprises a pressure air pipeline which is vertically arranged and is in parallel with the sand lifting pipeline, the lower port of the pressure air pipeline is transversely communicated with the middle part of a horn body, and the position of the lower port of the pressure air pipeline is higher than the position of the lower inlet of the sand lifting pipeline. The inclined plate rotational flow sand setting system of the invention has the advantages of good sand setting effect, high processing efficiency, low enforcement and maintenance cost (close to no maintenance), good operation continuity, and convenient maintenance and servicing.

Description

technical field [0001] The invention relates to a grit settling system, in particular to a slant plate swirling flow grit settling system. Background technique [0002] The grit settling system is the equipment used to separate and extract sand from sewage in the sewage treatment plant, also known as the grit settling tank. There is a swirling flow grit chamber with a circular reinforced concrete structure in the grit chamber of the Yongchuan Sewage Treatment Plant. The structure of the swirl grit chamber is as follows, including the pool body, the lower half of the pool body is a sand bucket part with a conical inner cavity, and the upper half part of the pool body is a sand settling area with a cylindrical inner cavity with a diameter larger than the sand bucket part. , there is an inflow port and an outflow port above the pool body; it also includes a sand lifting pipeline vertically arranged in the middle of the pool body, the lower end of the sand lifting pipeline exte...

AI Technical Summary

Problems solved by technology

[0004] This existing swirl type sand settling system has the following defects: 1. The swirl type settlement is carried out only by the power provided by the stirring device, and the sand sedimentation efficiency is low, resulting in poor treatment effect

2. The generation of swirling flow depends on the installed stirring device, which has high cost and high maintenance cost. At the same time, the setting position of the stirring device and the position of the sand lifting pipeline will overlap, which brings inconvenience to the implementation and further increases the cost

3. The arrangement of the sand lifting pipe and the pressure air pipe makes it easy to be blocked, the agitator is also easy to be stuck, and the grit chamber is difficult to operate continuously, which reduces the processing efficiency and increases the maintenance cost

4. During maintenance, it is necessary to temporarily place a submersible sewage pump in the tank body, and the maintenance operation can only be carried out after emptying the sewage and sand in the tank, which is extremely inconvenient

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