Ultra pure water treatment equipment is a water treatment equipment that uses pretreatment, reverse osmosis technology, ultra purification treatment and post-treatment methods to almost completely remove the conductive medium in the water, and remove the non dissociated colloidal substances, gases and organics in the water to a very low degree.

Pure water equipment mainly adopts reverse osmosis membrane technology. Its working principle is to exert certain pressure on water to make water molecules and ionic mineral elements pass through the reverse osmosis membrane, while most inorganic salts (including heavy metals), organics, bacteria and viruses dissolved in water cannot pass through the reverse osmosis membrane, so as to strictly separate the permeated purified water from the impermeable concentrated water; The pore diameter of reverse osmosis membrane is only 0.0001 μ m, while the diameter of virus is generally 0.02-0.4 μ m and that of ordinary bacteria is 0.4-1 μ M.

1、 Different uses

（1） Purpose of ultra pure water equipment:

1. Production and cleaning of ultrapure materials and ultrapure reagents.

2. Production and cleaning of electronic products.

3. Production of battery products.

4. Production and cleaning of semiconductor products.

5. Production and cleaning of circuit boards.

6. Production of other high-tech fine products.

（2） Purpose of pure water equipment:

1. Chemical water treatment of power plant

2. Ultra pure water for electronics, semiconductor and precision machinery industries

3. Preparation of food, beverage and drinking water

4. Small pure water station, group drinking pure water

5. Water for fine chemicals and fine cutting-edge disciplines

6. High purity water preparation required by other industries

7. Process water for pharmaceutical industry

8. Desalination of seawater and brackish water

2、 The conductivity of water is different

1. Effluent quality of ultrapure water: resistivity > 15m Ω cm

Ultrapure water quality is divided into five industry standards, which are 18m Ω respectively cm、15MΩ. cm、10MΩ. cm、2MΩ. cm、0.5MΩ. Cm to distinguish different water quality.

2. Pure water is divided into industrial pure water and drinking pure water. Industrial pure water: at 25 ℃, 1. Ordinary pure water: EC = 1 ~ 10us / cm; 2。 High purity water: EC = 0.1 ~ 1.0us/cm; 3。 Ultrapure water: EC = 0.1 ~ 0.055; Pure drinking water: EC = 1 ~ 10 US / cm (national standard).

3、 The process flow adopted by various equipment is different

（1） The process flow of ultra pure water equipment is as follows:

1. Pretreatment system → reverse osmosis system → intermediate water tank → coarse mixing bed → fine mixing bed → pure water tank → pure water pump → ultraviolet sterilizer → polishing mixed bed → precision filter → water object (≥ 18m Ω. Cm) (traditional process).

2. Pretreatment → reverse osmosis → intermediate water tank → water pump → EDI device → purified water tank → pure water pump → ultraviolet sterilizer → polishing mixed bed → 0.2 or 0.5 μ M precision filter → water object (≥ 18m Ω. Cm) (new process).

3. Pretreatment → primary reverse osmosis → dosing machine (pH adjustment) → intermediate water tank → secondary reverse osmosis (positive charge reverse osmosis membrane) → pure water tank → pure water pump → EDI device → ultraviolet sterilizer → 0.2 or 0.5 μ M precision filter → water object (≥ 17m Ω. Cm) (new process).

4. Pretreatment → reverse osmosis → intermediate water tank → water pump → EDI device → pure water tank → pure water pump → ultraviolet sterilizer → 0.2 or 0.5 μ M precision filter → water object (≥ 15m Ω. Cm) (new process).

5. Pretreatment system → reverse osmosis system → intermediate water tank → pure water pump → coarse mixing bed → fine mixing bed → ultraviolet sterilizer → precision filter → water object (≥ 15m Ω. Cm) (traditional process).

（2） The process flow of pure water equipment is:

1. Ion exchange method

Raw water → raw water booster pump → multi-media filter → activated carbon filter → water softener → precision filter → cation resin filter bed → anion resin filter bed → anion resin mixed bed → microporous filter → water point

2. Two stage reverse osmosis is adopted

Raw water → raw water booster pump → multi-media filter → activated carbon filter → water softener → precision filter → first stage reverse osmosis → pH regulation → intermediate water tank → second stage reverse osmosis (positive charge on the surface of reverse osmosis membrane) → purified water tank → pure water pump → microporous filter → water point

3. EDI mode is adopted

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 point