SCREEN WASHING DEVICE FOR SCREW PRESS TYPE DEHYDRATOR

摘要

PROBLEM TO BE SOLVED: To provide a screen washing device for a screw press type dehydrator capable of reducing a water quantity required for washing, more perfectly removing solids from the screen and also not lowering dehydration performance even after a dehydration operation for a long time. SOLUTION: In the screen type washing device for the screw type dehydrator for dehydrating surplus sludge generated at a discharge treatment facility such as a sewerage treating place, a sealing cover 12 for hermetically covering a screen part so that water is filled in the inside, is formed and also an air diffusion pipe 13 for injecting air into the water in the sealing cover 12 and washing the screen face with air is provided on the bottom of the sealing cover 12.