Ship desulfurization wastewater discharge outboard diffusion device

The invention discloses a ship desulfurization wastewater discharge outboard diffusion device which comprises a drainage pipe, the drainage pipe comprises a glass reinforced plastic pipe arranged inside and a duplex stainless steel pipe sleeved outside, the drainage pipe comprises a water inlet end and a water outlet end, the water outlet end is connected with a flow guide ring, and a flow distribution column is arranged along the axial center line of the drainage pipe. A connecting rod used for fixing the flow dividing column is arranged on the side, close to the water inlet end, of the flow dividing column, three flow guiding plates are arranged on the inner wall of the water outlet end of the drainage pipe in a circumferential array mode, the inner ends of the flow guiding plates are fixedly connected with the outer wall of the flow dividing column, and the outer ends of the flow guiding plates are fixedly connected with the inner wall of the drainage pipe. A scraper is arranged at the outer end of the imp