Backward and forward scraper for rectangular decanter

PRVR

CATEGORY SEWAGE
TYPOLOGY CLARIFIERS

WHEN TO USE IT

Backward and forward scraper for rectangular decanter PRVR type can be used whenever it’s necessary to perform a process of water sedimentation of any flow rate that contains sedimentable suspended solids of any nature.

HOW IT’S MADE

Backward and forward scraper for rectangular decanter PRVR type consists of: a mobile girder used as a walkway; a pair of side sliding trolleys; an articulated system for collecting sludge and skimming; a gear motor to drive the two side trolleys, a control unit of the articulated bottom scraper system and foaming blade; and an electric control panel. The gear motor and the control unit are mounted at the centre of the bridge.

HOW IT WORKS

The water inlet is located on one of the two short sides of the tank. During the outward run, the sludge is scraped from the bottom scraper, in the direction opposite to the horizontal component of the rate of sedimentation. The floating substances are collected by the surface scraper in one of the two phases of the movement. Protection against overload is provided by a system of periodic control of the bridge working cycle.