UPWARD STREAM TYPE FILTER DEVICE

摘要

PURPOSE:To efficiently wash the filter layer of a filter device consisting of a floatable filter material while saving the water to be used and eliminating the need of the water flow linear velocity faster than a specified value. CONSTITUTION:In this upward stream system filter device in which the filter layer 11 consisting of the floatable filter material is provided in a filter tank 10 and a feed water is allowed to flow through the filter layer 11 by upward stream, the water jetting pipe 15 jetting water downward is provided at the upper part of the insides of the filter layer 11 and the circulating pipe 16 for discharging the liq. in the tank bottom part by a circulating pump P is connected to the water jetting pipe 15, and also the drain pipe 17 for discharging the water in the tank and the water charging pipe 18 for replenishing water into the tank from upward are provided.