Ship exhaust system and wet exhaust apparatus thereof

The invention discloses a ship exhaust system and a wet exhaust apparatus thereof. The wet exhaust apparatus is connected in the ship exhaust system, and comprises a main body pipe, a gas inlet pipe,a water inlet pipe and a gas exhaust pipe, wherein the gas inlet pipe and the water inlet pipe are disposed at a first end surface of the main body pipe, the gas exhaust pipe is disposed at a second end surface of the main body pipe; the gas inlet pipe is connected to an outlet end of a first smoke exhaust pipe, the water inlet pipe is connected to a first outlet end of a seawater discharge pipe;the gas exhaust pipe is connected to an inlet end of a second smoke exhaust pipe, a first elbow is connected to the gas exhaust pipe; and the first elbow is disposed in the main body pipe, and the endopening of the first elbow is disposed downward, wherein the distance between the bottommost position at the end opening of the first elbow and a centerline of the gas exhaust pipe is between a radius of the gas exhaust pipe a