Control method and apparatus for backwash of filter media bed ba

Details Control method and apparatus for backwash of filter media bed ba Control method and apparatus for backwash of filter media bed ba

1996-09-20

1998-06-02

Drodge, Joseph W.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210108, 210275, 210793, B01D 2448, B01D 2446

Patent

active

057594120

ABSTRACT:
A control system for controlling a backwash operation in normal and high flow operating modes is provided in a traveling bridge filter having a filter basin; a filter media bed; a filtrate channel; a traveling bridge adapted to traverse the filter basin with a backwash hood suspended therefrom; a programmable logic controller; a reference sensor and five spaced water level sensors. The controller and the sensors control the backwash operation by sensor functions which differ between the normal and high flow operating modes.

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