Method for preventing marine main engine exhaust muffler from marine corrosion

Abstract

The invention relates to a method for preventing a marine main engine exhaust muffler from marine corrosion. The method comprises the following steps that a muffler is connected with an exhaust pipeline of a marine main engine; a cooling water channel on the muffler is connected with a closed loop fresh water pipeline; and the closed loop fresh water pipeline and a sea water pipeline are in heat quantity exchange through a plate type heat exchanger. According to the method disclosed by the invention, the manner of cooling the muffler with fresh water is adopted, so that the failure that the exhaust channel is plugged caused by that the muffler is subjected to marine corrosion, internal leakage is produced, and seawater salting is formed is avoided.

Description

technical field [0001] The invention relates to a method for preventing the exhaust muffler of a ship's main engine from being corroded by seawater, and is suitable for the occasion where the exhaust muffler of a ship's main engine is cooled by water cooling. Background technique [0002] The ship's main engine is the heart of the ship, providing power for the entire ship. The main engine will generate high noise when it is working, mainly including intake noise, exhaust noise, combustion noise and mechanical noise, among which the exhaust noise of the main engine is the most prominent, mainly composed of low-frequency noise and harmonic high-frequency noise. The noise is as high as 135 decibels. It will cause great harm to the concealment of the ship in wartime and the health of the engineers and the environment of the ship. In order to reduce the exhaust noise and solve a series of problems caused by the noise, the exhaust muffler is usually designed and installed at the...

AI Technical Summary

Problems solved by technology

[0004] However, due to the strong corrosion of seawater, ships that have been sailing along the coast for a long time generally have the problem of internal seawater leakage due to corrosion. Problems such as decline, seriously affect the performance and service life of the main engine of the ship

According to the survey, after 2 to 3 years of operation, internal seawater leakage and muffler blockage commonly occur in ships sailing along the coast, which lead to a series of problems such as high temperature of the main engine, reduction of oil pressure, and power drop, which seriously affect the reliability of the main power plant of the ship. sex

However, due to the limitation of the internal space and structure of the exhaust muffler of the main engine, it is impossible to carry out welding repairs. We can only open the inspection hole of the muffler, cut the muffler tube, manually clean the sea salt blocked inside, and replace it when it enters the factory for overhaul.

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