Liquid flow type capacitance pretreatment method for sea water desalination

Abstract

The present invention belongs to the field of sea water desalting technology. The pre-treatment process includes the technological steps of treating sea water successively in medium filtering unit, carbon filtering unit, precise filtering unit, ultrafiltering unit and nanometer membrane unit; and makes water reach the requirement of liquid flow type capacitive sea water desalter. The pre-treatment process can eliminate most of the hard ions in sea water and lower the concentration of water, so as to prevent scaling in sea water desalter, prolong the service life of sea water desalter, raise the efficiency of sea water desalter and lower cost of desalting sea water.

Description

Technical field:

[0001] The invention relates to a pretreatment method for seawater desalination by a liquid-flow capacitance method, and belongs to the field of seawater desalination treatment. Background technique:

[0002] Today, the shortage of fresh water resources has become a worldwide problem. At present, 500 million people in the world do not have access to clean water. By 2025, this number will increase fivefold to 2.8 billion, accounting for about 35% of the estimated global population of 8 billion. %. The solutions to the water shortage problem include continuing to find water, remote water transfer, waste water recycling, and formulating water conservation measures. However, desalination of seawater has become an effective way to use modern technology to open up new water sources on a large scale. In fact, this has become an inevitable trend all over the world. Due to the increasingly prominent water resource crisis, most countries are directly or indirectly ...

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