Patent ID: 7258784
Filing Date: 2007-08-21
Classification: B01D

Abstract:
1. In a liquid filtration system comprising a vessel, a contaminated liquid medium containing a particulate contaminant provided in the vessel, a filter element provided in the contaminated liquid medium for separating the liquid medium from the particulate contaminant and means for removing the separated liquid medium from the filter element, the improvement comprising the filter element is formed from sintered-together plastic particles and has substantially the shape of a narrow, hollow box with two large zigzag or corrugated first side walls having peaks and valleys, two narrow second side walls interconnect the first side walls, a bottom side and an opposite top side, the peaks and valleys of the first side walls extend in the direction from the bottom side to the top side and the top side further has a head attached thereto which is elongate and constitutes at least one flow passage, the filter element further comprising two unified halves, each half containing one of the first side walls, the head being provided on the first and second side walls such that the head surrounds and seals an outer surface of the first and second side walls with a first part of its height and extends beyond the first and second side walls with a second part of its height and an afflux surface of the filter element consists essentially of sintered-together plastic particles; a filter pump for removing clean liquid medium and a back-flush booster pump connected to the discharge of the filter pump for pressurizing a filter element and removing a deposited particulate layer therefrom; and a pressure accumulator and a pressure switch provided in the discharge of the back-flush booster pump.