Raw material coupling system and process method for making fresh water and salt from seawater by membrane method

Abstract

The invention relates to a raw material coupling system and a process method for making fresh water and salt from seawater by a membrane method. The system comprises a raw water tank, an ultra-filtration device, an ultra-filtration water tank, a brine electrodialysis separation device, a concentrated brine box, a dilute brine box, a seawater reverse osmosis desalting device and an output water tank; the raw water tank, the ultra-filtration device, the ultra-filtration water tank, the brine electrodialysis separation device, the concentrated brine box, the dilute brine box, the seawater reverse osmosis desalting device and the output water tank are connected with each other in order by pipes or pipes and pumps; and the concentrated brine box is connected with the brine electrodialysis separation device by the pipe. By the treatment of the process of the invention, the high-quality refined salt or the raw materials for salt chemical industries and high-quality fresh water are obtained; meanwhile, the negative effects on marine ecological environment caused by the SWRO (seawater reverse osmosis) concentrated brine are avoided, the cost in making salt from the seawater and the cost in desalting seawater are reduced; and the raw material coupling system and the process method for making the fresh water and salt from the seawater by the membrane method have good use value in northern water-deficient regions of our country.

Description

technical field [0001] The invention relates to a coupling system and a process method of fresh water produced by membrane method seawater-salt production raw materials, in particular to a system and process method of desalination of seawater, salt production from seawater, reverse osmosis concentrated water discharge. Background technique [0002] There is a serious shortage of fresh water resources in my country, especially in northern China, such as Tianjin, Beijing, Hebei, Shandong, Henan, Liaoning, Shaanxi and Gansu. In the "Outline of the Twelfth Five-Year Plan for my country's National Economic and Social Development", it is clearly stated that vigorously promote the utilization of recycled water, mine water, seawater desalination and brackish water. Therefore, it has become a very urgent task to use seawater desalination as an open-source incremental technology for water resources. [0003] Compared with the south-to-north water diversion, seawater desalination has ...

AI Technical Summary

Problems solved by technology

Salt production in salt fields is greatly affected by the environment. Factors such as seawater salinity, geographical location, rainfall, and evaporation will directly affect the production of salt. Moreover, this method takes up a lot of land and human resources, and needs to be improved.

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