EXHAUST GAS PURIFICATION DEVICE FOR SHIP, AND PURIFICATION METHOD OF THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purification device for a ship which is small-sized, low-cost, and emits a small amount of waste substances.SOLUTION: An exhaust gas purification device for a ship S1 of the present invention comprises: a pump 14a which sucks out circulation liquid w1 in a scrubber 11 which purifies exhaust gas from an engine D of a ship; at least two or more rotary membrane filtration devices 10A which filter the circulation liquid w1 sent from the pump 14a by a plurality of rotating disks 6; an exhaust valve 13a which exhausts filtered concentrated liquid w9 in the rotary membrane filtration devices 10A; and a control device which, in the case where the pump 14a and the rotary membrane filtration devices 10A are operated to filter the circulation liquid w1 sucked by the pump 14a by the rotary membrane filtration devices 10A and return the liquid to the scrubber 11, and a stopping condition for stopping the rotary membrane filtration devices 10A is established, performs control of stopping the pump 14a and the rotary membrane filtration devices 10A to open the exhaust valve 13a and exhausting the concentrated liquid w9 in the rotary membrane filtration devices 10A.