Introduction to seawater desalination equipment

Reverse osmosis seawater desalination method is the process of forcibly pressurizing seawater to allow fresh water to pass through a membrane surface and enter the other side, thereby achieving seawater desalination. It has the characteristics of low investment, low energy consumption (no phase change), short construction period, and small land occupation, and has developed rapidly in seawater desalination technology in the past two decades.

　 Except for Gulf countries, reverse osmosis is the main method used in large and medium-sized production facilities in the Americas, Asia, and Europe.
technological process:

Seawater undergoes pretreatment (mechanical filters, disc filters, ultrafiltration, etc.) to remove suspended solids and other harmful substances. Then, after being pressurized by a high-pressure pump, it enters the membrane desalination equipment, and the intermediate freshwater product produced enters the post-treatment facility (selected according to different uses of freshwater, such as drinking water, which needs to be treated)pHAdjust and add chlorine sterilization equipment to refine the final product into fresh water. Concentrated saltwater is discharged from the membrane desalination equipment.

Main advantages: Reverse osmosis is a phase-change free process, with low energy consumption and electricity consumption per ton of fresh water3.0-5.5Degree; Low engineering investment and water production costs; The device is compact and occupies less space; Easy to operate and convenient to maintain.
Scope of application: Suitable for desalination of large, medium, and small seawater and brackish water.
Development trend: Reverse osmosis technology has become one of the main methods for seawater desalination. Compared to the global seawater desalination market, it holds a significant market share26．8%The share. And seawater desalination is constantly developing towards large-scale development, with an increasing installed capacity. The advantage of reverse osmosis method is energy saving. Its energy consumption is only the same as that of electrodialysis method1/2The distillation method1/40Therefore, from1974Since the beginning of the year, developed countries such as the United States and Japan have successively shifted their development direction towards reverse osmosis law.

Engineering case

Medium scale seawater desalination

Integrated box type seawater desalination equipment