Method for continuously operating filtration apparatus for dredging and cleaning work ship

TLDR: In this paper, a plurality of filtration apparatuses are arranged in parallel on the suction side of a dredging pump 3 of a ship and during the time when one or more of them is operated as a cleaning route for dredging or removing refuse matter, the other one is driven as a back washing route to back-wash the screen of the filatration apparatus with water stored in ship storehouse 4 and the cleaning route operation and the back-washing route operation are reciprocally carried out.

Abstract: PROBLEM TO BE SOLVED: To provide a method for automatically cleaning screen without requiring the man power and without interrupting the dredging work even if a screen of a filtration apparatus is clogged, and also a method for heightening the refuse matter density sucked in the hatch of a work ship at the time when dredging or water surface cleaning work is carried out by a dredging work ship. SOLUTION: A plurality of filtration apparatuses 11 , 12 are arranged in parallel on the suction side of a dredging pump 3 of a dredging work ship and during the time when one or more filtration apparatuses are operated as a cleaning route for dredging or removing refuse matter, the another filtration apparatus is driven as a back washing route to back-wash the screen of the filtration apparatus with water stored in ship storehouse 4 and the cleaning route operation and the back washing route operation are reciprocally carried out, so that dredging and cleaning work can continuously be carried out and at the same time the density of the refuse matter sucked to the ship storehouse can be heightened.