Waste water pretreatment device with ladder buoy-type bar screen

Abstract

The invention discloses a waste water pretreatment device with a ladder buoy-type bar screen, comprising a suspended solid intercept system, a buoy alarming system and a support plate holder system, wherein the suspended solid intercept system comprises a first-level ladder-type barrier net, a second-level vertical-type barrier net and a third-level vertical-type barrier net. The device can be arranged in a water channel between a waste water collecting pool and a regulating reservoir. In the invention, suspended hair in waste water is intercepted by two levels of barrier nets and then processed by subsequent water treatment technology; and the buoy alarming system is started to remind workers to clean and maintain the barrier nets when waste water level rises to overflow slots due to that the first-level ladder-type barrier net and the second-level vertical-type barrier net are blocked level by level. The device has the advantages of easy installation and maintenance, high intercepting efficiency of suspended solids, good effect, and long cleaning and maintenance cycle, realizes automatic alarming when the barrier nets are blocked, reduces destruction risk for stable operation of subsequent water treatment technology, and is especially applied to pretreatment of bath waste water with a large amount of hair.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment in environmental protection, and relates to a solid-liquid separation device in a wastewater pretreatment process. Background technique [0002] The grid decontamination technology in the wastewater pretreatment process is widely used in the separation of suspended solids in various industrial and domestic sewage. Compared with the development of the core technology of wastewater back-end treatment, its development is relatively slow and lagging behind, but its development in the entire wastewater treatment However, it is of indispensable importance in the process. The solid-liquid separation effect of the grid directly affects the normal and stable operation of the subsequent lifting pump and the entire water treatment process. Especially the bathing sewage containing a lot of hair, the current traditional mechanical grille can't intercept it well, and the passing hair-containing was...

AI Technical Summary

Problems solved by technology

[0002] The grid decontamination technology in the wastewater pretreatment process is widely used in the separation of suspended solids in various industrial and domestic sewage. Compared with the development of the core technology of wastewater back-end treatment, its development is relatively slow and lagging behind, but its development in the entire wastewater treatment However, it is of indispensable importance in the process. The solid-liquid separation effect of the grid directly affects the normal and stable operation of the subsequent lifting pump and the entire water treatment process.

Especially the bathing sewage containing a lot of hair, the current traditional mechanical grille can't intercept it well, and the passing wastewater containing hair is still very easy to block the lifting pump and cause shutdown accidents

CN101306274A discloses a rotary grid decontamination wastewater pretreatment device, which can continuously and automatically intercept and remove fine, short, and broken suspended matter in wastewater, but for hair that is extremely easy to tangle, it cannot be automatically washed by rinsing. Clearing will bring inconvenience to the actual operation and maintenance, and its water intake method is the internal water intake of the water pipe type turntable, which is not reliable in the actual installation of the project and when the water intake is large

Images