Device for treating cleaning waste water of marine exhaust gas

Abstract

The present invention addresses the problem of providing a device for treating cleaning waste water of marine exhaust gas, the device making it possible to solve issues such as clogging or wear of a spray nozzle in a scrubber due to dirt components such as soot in scrubber water in a scrubber circulation system. The device for treating cleaning waste water of marine exhaust gas solves the problem by comprising: an exhaust gas recirculation unit 1 which has an exhaust gas cleaning unit 100 for cleaning marine exhaust gas with scrubber water and reduces the amount of nitrogen oxides in the exhaust gas by recirculating some of the marine exhaust gas to a marine engine; a buffer tank 5 for receiving and storing at least scrubber waste water generated by scrubber cleaning using the exhaust gas recirculation unit; a drain water tank 13 for receiving and storing the scrubber waste water from the buffer tank 5; a centrifugal separator 15 for introducing the scrubber waste water from the drain water tank 13 and performing purification by solid-liquid separation; a membrane device 27 for further purifying treated water purified by the centrifugal separator 15; and a return pipe 60 for returning the treated water purified by the membrane device 27 to the buffer tank 5.

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