Common problems of marine water generators

The water generators on ocean-going ships are of great significance to the economic benefits of transportation and the ability to respond to changes in shipping conditions. Once the water generator fails, it will not only affect the normal life of the crew, but also endanger the transportation safety of the ship. Therefore, it is very necessary to ensure the normal operation of the water generator and provide sufficient fresh water.

The fresh water output of the water generator mainly depends on the evaporation capacity of the evaporator, which is related to factors such as the heat transfer coefficient, heat exchange area, seawater boiling point, and main engine jacket water temperature that affect the heat transfer effect of the evaporator. The influence of the temperature factor on the flow of sea water.

The reasons for the insufficient water production of the water generator are:

1 serious scaling on the heat exchange surface of the evaporator, resulting in a small heat transfer coefficient that affects the heat transfer effect;

2 insufficient vacuum, resulting in an increase in the boiling point of seawater;

3 low heating temperature of the main engine jacket water;

4 The blockage of the channel into the evaporator makes the water supply of the evaporator insufficient, and the water level of the shell-and-tube evaporator is too low;

5 The solenoid valve at the outlet of the condensate pump is not closed tightly, and fresh water returns.

The amount of water produced by the water generator directly depends on the amount of evaporation.

The main reasons for the decrease in the output of the water generator are:

1 the vacuum cannot be established or cannot be maintained;

2 the heat exchange surface is dirty and fouled.