Brief Introduction of Ultrapure Water Equipment in Electronic Industry

Release time:

2024-04-12

Ultra-pure water equipment in the electronic industry is usually composed of multi-media filters, activated carbon filters, sodium ion softeners, precision filters, etc. Pretreatment system, RO reverse osmosis host system, ion exchange mixed bed (EDI electric desalination system) System, etc. constitute the main equipment system.

Preparation process:

1. The traditional water treatment method of preparing ultrapure water in electronic industry by ion exchange resin is as follows: raw water → multi-media filter → activated carbon filter → precision filter → intermediate water tank → positive bed → negative bed → mixed bed (compound bed) → ultrapure water tank → ultrapure water pump → post security filter → water point.

2. The method of combining reverse osmosis water treatment equipment and ion exchange equipment to prepare ultrapure water for electronic industry is as follows: raw water → multi-medium filter → activated carbon filter → precision filter → intermediate water tank → reverse osmosis equipment → mixed bed (double bed) → ultra-pure water tank → ultra-pure water pump → post-security filter → water point

3, the use of reverse osmosis equipment and electrodeionization (EDI) equipment for the preparation of electronic industry ultra-pure water, which is a preparation of ultra-pure water of the latest process, but also an environmentally friendly, economic, development potential of the ultra-pure water preparation process, the basic process is: raw water → multi-media filter → activated carbon filter → precision filter → intermediate water tank → reverse osmosis equipment → electrodeionization (EDI)→ ultra-pure water tank → ultra-pure water pump → rear security filter → water point

Electronic ultra-pure water equipment adopts multi-media filter, activated carbon filter and security filter as the design of the pre-treatment, effectively remove the suspended solids, sand, particles, organic colloid, organic matter, odor, residual chlorine and other impurities in the raw water, so that the water quality after ion exchange treatment meets the requirements of industrial production. The finishing system (mixed bed system) is carried out at the back end to make the water quality meet the requirements of production water.

mixed bed principle

A, electrolyte ions (calcium, magnesium, iron, sodium plasma) through the liquid film into the resin surface of the electronic ultra pure water equipment;

B, ions into the resin;

c. ion exchange;

D, H ions or OH ions to the resin external diffusion;

E, H ions or OH ions into the water to form H2O.

Double bed, also known as complex bed, complex bed is a series of two different ion exchange exchangers, such as strong acid cation exchange resin and strong basic anion exchange resin in series. This equipment composed of a positive bed and a negative bed in series is called a compound bed. The water first passes through the positive bed to remove positively charged ions (such as Ca2, Mg2, K, Na) and displaces H ions into the water. Then the negative ions (such as SO2-4, Cl-, HCO- 3) in the water are removed and OH-ions are replaced into the water. At the same time, H ions and OH-ions combine to form water H2O, thereby achieving deionization.

EDI Principle

EDI uses mixed ion exchange resin to adsorb anions and cations in water, and these adsorbed ions are removed by the anion and cation membrane under the action of DC voltage.

The working principle of the electronic ultra-pure water equipment is the ion exchange process of two fresh water chambers and one concentrated water chamber. A concentrated water chamber is formed between the anion membrane facing the positive electrode and the cation membrane facing the negative electrode; a fresh water chamber is formed between the anion membrane facing the negative electrode and the cation membrane facing the positive electrode. Anion and cation resins are sandwiched between the fresh water chamber and the concentrated water chamber. When water flows through the fresh water chamber and the concentrated water chamber, the ion exchange resin adsorbs ions in the water. The electrodes at both ends of the CDI module provide a transverse DC electric field, which drives the ions adsorbed by the ion exchange resin to pass through the ion membrane. As a result, the ion concentration of the water in the fresh water chamber is reduced and the ion concentration of the water in the concentrated water chamber is increased, thus, the purity of the water in the fresh water chamber becomes higher and higher. The CDI module is composed of many such basic units combined together in parallel operation.

Application areas

Application fields of ultrapure water edi equipment for the electronics industry

1, semiconductor materials, devices, printed circuit boards and integrated circuits finished products, semi-finished products with ultra-pure water;

2. Ultra-pure water for blending ultra-pure materials and ultra-pure chemical reagents;

3. Ultra-pure water for laboratory and pilot plant;

4. Surface polishing treatment of automobiles and household appliances;

5. Optoelectronic products;

6. Other high-tech subtle products;

None

Tomb Sweeping Day Holiday Notice

Quick Connect

Website home page
About Us
engineering case
Product display
News information
Talent Recruitment
Contact Us

Chongqing Bochuang Water Treatment Equipment Co., Ltd.

Chongqing Bochuang Water Treatment Equipment Co., Ltd. is a modern high-tech enterprise integrating R & D, design, manufacturing, installation, commissioning, operation management and after-sales service of water treatment and environmental protection equipment.