Marine diesel engine waste gas washing water treatment device utilizing ship waste heat

The invention discloses a marine diesel engine waste gas washing water treatment device utilizing ship waste heat. The marine diesel engine waste gas washing water treatment device comprises a flue gas washing module and a waste water treatment recycling module; the flue gas washing module comprises a heat exchange unit, a washing tower, a medicine dispensing box, a metering pump, a chimney, a liquid-gas separation device, a fan, a flue gas heat exchanger, a two-stage filtering sedimentation cabinet, an electric heater and a sewage pump; and the wastewater treatment recycling module comprisesa steam ejector, an injection pump, a flash tank, a condenser, a liquid storage tank and a centrifugal pump a. The marine diesel engine waste gas washing water is treated by utilizing the ship waste heat, so that the energy consumption is reduced, and the consumption of fresh water is reduced; no wastewater is discharged in the treatment process, and no pollution is caused to the ocean; washing water can be recycled after