FIELD: process engineering.
SUBSTANCE: invention relates to ship building. Proposed system is available in three versions. In compliance with first version, complex system for treatment of bilge water and water downstream of exhaust gas filter comprises one device, i.e. two-stage separator composed by rotary separator and membrane filter to feed cleaned water to exhaust gas filter in closed cycle. In compliance with second version, proposed system comprises controlled-output vacuum fan arranged at engine exhaust line while gases are fed to filters by controlled-displacement shutter. In compliance with third version, controlled pH outboard water is used as a cleaning solution for exhaust gas filter. Alkalinity is ensured by mixing outboard water with sweet water or by adding potassium hydroxide. Amount of cleaning solution fed to the filter is optimised in automatic control over pump delivery depending upon gas cleaning quality and engine load.
EFFECT: decreased emission of nitrogen and sulfur oxides.
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