Scrubber system and method

摘要

The present invention relates to a method for removal of SO2 from exhaust gas from a marine engine or a marine boiler of a ship. The exhaust gas from said marine engine or marine boiler is cooled and washed with seawater in a first scrubber section, and subsequently, in a second scrubber section, washed with circulating freshwater with an addition of an alkaline chemical. The circulating freshwater used for washing is warmer than the seawater used for cooling in the first scrubber section. The warmer freshwater is indirectly heat exchanged with cold seawater. The exhaust gas washed in the first scrubber section is passed via a demister unit before it is washed with circulating freshwater in the second scrubber section. The invention further relates to a corresponding scrubber system.

主权项

1. A method for removal of SO2 from exhaust gas from a marine engine or a marine boiler of a ship, wherein the exhaust gas from said marine engine or marine boiler in a first scrubber section is cooled and washed with seawater, and subsequently in a second scrubber section is washed with circulating freshwater with an addition of an alkaline chemical, the circulating freshwater used for washing being warmer than the seawater used for cooling, and wherein the warmer freshwater is indirectly heat exchanged with cold seawater, the method further comprising passing the exhaust gas washed in the first scrubber section via a demister unit before it is washed with circulating freshwater in the second scrubber section.