Novel membrane-process sea water desalination and fresh water and salt preparation system and technique

Abstract

The invention relates to a novel membrane-process sea water desalination and fresh water and salt preparation system and technique. The novel membrane-process sea water desalination and fresh water and salt preparation system comprises a raw water tank, an ultrafiltration device, an ultrafiltration water tank, a sea water reverse-osmosis desalination device, a water production tank, an electroosmosis salt and water separation device and a concentrated salt water tank, wherein the raw water tank, the ultrafiltration device, the ultrafiltration water tank, the sea water reverse-osmosis desalination device and the water production tank are connected sequentially through pipelines or pipelines and pumps. The sea water reverse-osmosis desalination device, the electroosmosis salt and water separation device and the concentrated salt water tank are sequentially connected through pipelines. By the aid of the technique, high-quality refined salt or salt chemical raw materials and high-quality fresh water can be produced, and meanwhile, adverse effects on the ecological environment of the sea area from discharge of SWRO (sea water reverse osmosis) concentrated salt water are avoided, costs for salt manufacturing by sea water and sea water desalination can be greatly reduced, and particularly, the novel membrane-process sea water desalination and fresh water and salt preparation system has high use value for water-deficient regions in northern of China.

Description

technical field [0001] The invention relates to a novel membrane-based seawater desalination raw material system and process for producing fresh water and salt production, in particular to a system and process for seawater desalination, seawater salt production, and reverse osmosis concentrated water safety discharge. Background technique [0002] The large-scale application of desalination technology began in the arid Middle East, but it is not limited to this region. Since more than 70% of the world's population lives within 120 kilometers from the ocean, seawater desalination technology has been rapidly applied in many countries and regions outside the Middle East in the past 20 years. At present, the daily output of seawater desalination in the world is about 35 million cubic meters, 80% of which are used for drinking water, which has solved the water supply problem of more than 100 million people. The attention of many coastal countries. The world's direct use of seaw...

AI Technical Summary

Problems solved by technology

However, when SWRO produces fresh water, it also produces a large amount of concentrated brine (accounting for about 55-60% of the original seawater volume), if it is directly discharged, it will have a bad impact on nearby sea areas and the environment

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