Patent ID: 8038774

Claim:
A ship flue gas desulphurization (FGD) method using seawater, comprising: A) flowing the ship flue gas through a cooling section and thereby cooling the high-temperature flue gas, followed by scrubbing flue gas containing SO 2 from ship engine to thereby obtains scrubbed clean gas, wherein said scrubbing is done with seawater and in a scrubber, and discharging the scrubbed clean gas; separating impurity from acidic seawater formed during the scrubbing process due to the absorption of SO 2 , and discharging the impurity through a waste outlet; B) transferring said acidic seawater after separating the impurity to a water-saving deacidification device; C) blending acidic seawater in the water-saving deacidification device with alkaline seawater, making mixed seawater, and aerating the mixed seawater; and D) discharging the seawater after deacidification once the seawater is deemed suitable for discharging into the sea.