Advantages and disadvantages of multi-effect evaporation technology for desalination of distilled seawater

Although multi-effect distillation is the earliest seawater desalination technology, it has not been widely used due to scaling and corrosion. With the emergence and development of low-temperature multi-effect distillation technology, its market share is expanding. Compared with multi-stage flash distillation, multi-effect distillation has the following advantages:

① High heat transfer coefficient and small heat transfer area;

(2) low requirements for water quality, especially in places with low water temperature and poor water quality, such as the northern coastal areas of China;

(3) high operation flexibility;

(4) High heat energy utilization rate.

Its main disadvantages are:

① Compared with RO method, it needs to consume a certain amount of steam.

② The structure of the equipment is very complicated.