Desalination Membrane Equipment Operation Method:

Seawater, due to its high salt content, cannot be used directly. There are mainly two methods for desalinating seawater: distillation and reverse osmosis.

Distillation Method

Distillation is primarily used in large-scale seawater desalination projects and areas abundant in thermal energy. The reverse osmosis membrane method is very versatile and has high desalination rates, thus widely employed. This method begins by extracting seawater, undergoing initial treatment to reduce turbidity and prevent the growth of bacteria, algae, and other microorganisms. Subsequently, a special high-pressure pump is used to increase pressure, forcing seawater through the reverse osmosis membrane. Given the high salt content in seawater, the membrane must have high desalination rates, be corrosion-resistant, pressure-resistant, and anti-pollutant. After treatment, the seawater's salt content is significantly reduced, with TDS levels dropping from 36,000 mg/l to around 200 mg/l. The quality of the desalinated water is even superior to tap water, making it suitable for industrial, commercial, residential, and maritime use.

Reverse Osmosis Method

High salinity and hardness in seawater, coupled with significant seasonal temperature variations, make reverse osmosis seawater desalination systems much more complex than conventional brackish water desalination systems, and also result in higher engineering investment and energy consumption. Therefore, it is particularly important to reduce engineering costs and energy use through careful process design and rational equipment configuration, thereby lowering the unit cost of water production and ensuring stable system operation.