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After years of research and development, China's seawater desalination technology has made significant progress in related fields. The main technologies for large-scale application of seawater desalination are divided into two categories: thermal method (distillation method) and membrane method (reverse osmosis).

The development of membrane method began in the 1960s. The principle of reverse osmosis membrane seawater desalination technology is to filter out fresh water through a polymer membrane after pre-treatment under high pressure. The reverse osmosis membrane law has gradually gained the upper hand in the market due to its characteristics such as low investment, low energy consumption, low cost, and short construction period, with broad development prospects.