Miniaturized ship desulphurization nitrate-reduction dust collector

The invention discloses a miniaturized ship desulphurization nitrate-reduction dust collector. The dust collector comprises a washing tower, a seawater circulatory system, an alkali lye circulatory system and a control system, a seawater desulphurization dedusting layer, an alkali lye desulphurization layer and a dehumidifying layer are arranged in the washing tower from down to up, a tail gas introduction pipe is arranged between the seawater desulphurization dedusting layer and the alkali lye desulphurization layer, the tail gas introduction pipe and the upper end of the seawater desulphurization dedusting layer are subjected to butt joint, an air exhaust opening and an exhaust manifold are arranged at the upper end of the washing tower, the exhaust manifold is connected with a diesel engine scavenging air receiver in a ship, the seawater circulatory system is respectively connected with the seawater desulphurization dedusting layer and the alkali lye desulphurization layer, the alkali lye circulatory syste