DREG RUN-OFF PREVENTIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a maintenance-free dreg run-off preventive device having a self-cleaning function in non-power. SOLUTION: A plurality of support shafts 13 are arranged in parallel by supporting both ends by frames 11, and a plurality of rotary elements 14 movably rolled around the axial centers of the support shafts 13 are arrayed mutually in a latticed shape or a zigzag latticed shape at regular intervals and a filter screen is formed.