As is well known, the pure water required in the production process of the battery industry is extremely high. The resistivity of pure water should be above 10 megaohms. Currently, there are various types of pure water on the market that can produce resistivity above 10 megaohms, such as deionized water equipment, ultrapure water equipment, industrial pure water machines, etc. Today, let's learn about whether deionized pure water equipment can be used to produce industrial pure water for batteries?

 

Firstly, industrial pure water for battery production can be produced using deionized water equipment. The resistivity of pure water produced using different water treatment processes varies. Deionized water equipment can use ion exchange process, secondary reverse osmosis process, and electro deionization EDI process.

 

Secondly, the water treatment process flow is as follows:

 

Ion exchange process: raw water → raw water booster pump → multi-media filter → activated carbon filter → precision filter → cation exchanger → anion exchanger → mixed ion exchanger → microporous filter → water user.

 

Secondary reverse osmosis process: raw water → raw water booster pump → multi-media filter → activated carbon filter → water softener → precision filter → first stage reverse osmosis → pH adjustment → intermediate water tank → second stage reverse osmosis (with positive charge on the surface of the reverse osmosis membrane) → purified water tank → pure water pump → microporous filter → water target.

 

Electrodeionization EDI process: raw water → raw water booster pump → multi-media filter → activated carbon filter → water softener → precision filter → primary reverse osmosis machine → intermediate water tank → intermediate water pump → EDI system → microporous filter → water object.

 

At present, many battery industries generally use first stage reverse osmosis to obtain ultrapure water through ion exchange mixed bed or EDI electro deionization equipment.