Patent ID: 6942786
Filing Date: 2005-09-13
Classification: B01D

Abstract:
1. A cleaning device for cleaning waste water, comprising: a waste water container for receiving a flowing supply of waste water; an endless filtering belt guided through the container for filtering the waste water, the belt passing over a series of turn rollers that define an upward rising section and a horizontal section wherein residue trapped on the belt faces downward; control means for controlling the speed of movement of the filtering belt relative to the supply of waste water to maintain the waste water surface below a selected level and thus obtain a strong dewatering within the upward rising section of the filtering belt; a blowoff device mounted over the horizontal section of the filtering belt with a front end side facing toward the filtering belt for blowing air towards the filtering belt, the blowoff device having an elongated slit having an expanding section expanding from a constriction, and a curved transition region leading from the expanding section to the front end side of the blowoff device; a nozzle pipe for spraying water jets toward the filtering belt, the nozzle pipe being mounted in parallel with the blowoff device and downstream thereto; and a screw conveyor arranged below the blowoff device for removing the residue dislodged from the filtering belt.