GAP-CONTROL TYPE FILTERING DEVICE

摘要

PURPOSE: A gap-control type filtering device is provided which is effectively separates and eliminates floating substances in the water and also promptly removes the floating substances captured in a filtering device. CONSTITUTION: In the gap-control type filtering device for removing floating substances from liquid, (i) a filter layer(21) is made of an elastic filtering material such as fiber thread, non woven fabrics and sponge; (ii) at least one gap control bags(24) are placed on the filter layer(21) to control the gap rate and the gap size of the filter layer(21) in both horizontal and vertical directions by blowing fluid thereinto; and (iii) water for washing is supplied or discharged selectively from both up and down directions by supplying air for washing form the lower part of the filtering device to the gap control bags(24) by repeating a motion of sucking or discharging the fluid to the gap control bags(24) when washing.