Liquid filtration apparatus with adjustable media guide and improved segregation of clean and contaminated liquid

摘要

Liquid filtration apparatus including an endless chain movable in upper and lower runs through a tank and carrying a continuous web of media on the upper run which passes over a guide roller at the upper rear of the tank, under relatively large diameter guide wheels and over driven guide sprockets at the upper front of the tank. The chain and media also pass over an idler roller between the guide wheels and the driven sprocket. The shaft of the idler roller is adjustably positioned in horizontal slots in the tank side walls to change the vertical angle of the media as it exits the pool of dirty liquid. When the media is at a steep angle a greater head of dirty liquid may be maintained, but contaminants may fall off the media, in which case the idler roller position is moved farther away from the guide wheels to provide a more gradual angle of media travel. Arcuate troughs are affixed to the tank side walls adjacent to and substantially concentric with the lower peripheries of the guide wheels to receive any dirty liquid which may leak through the edge seals or escape above the edge seals due to overfilling the dirty liquid pool.