Scrubber seawater quantity control apparatus, scrubber seawater quantity control method, alkaline quantity control apparatus and alkaline quantity control method

摘要

To provide a scrubber seawater quantity control device capable of supplying stable seawater quantity to the scrubber so that stable operation can be performed so that the concentration of sulfur oxide in the exhaust gas after treatment does not exceed the regulation value. A scrubber seawater quantity control device that controls the amount of seawater supplied to a scrubber that scrubs sulfur oxides contained in exhaust gas by bringing it into contact with seawater is based on the absorption output of sulfur oxides by seawater from the sulfur content of the engine output and the fuel oil A minimum seawater quantity converter (61) for calculating a minimum seawater quantity which is the minimum required seawater quantity, and a seawater quantity such that the sulfur oxide contained in the exhaust gas discharged from the scrubber to the atmosphere falls below a set value An addition element (69) for calculating a set seawater quantity by adding the minimum seawater quantity and the corrected seawater quantity, a seawater quantity correction converter (68) for calculating a corrected seawater quantity, an addition element (69) for calculating the set seawater quantity, To the scrubber, and a pump control device (70) for controlling the scrubber to supply the scrubber.