High purity water equipment-Fornitore globale

No. 27 Longteng Road, Longtian Community, Longtian Street, Pingshan New District, Shenzhen, Guangdong Province

High purity water equipment

1、 What is high-purity water
High purity water is water with extremely high chemical purity, with impurities content less than 0.1mg/L. Generally, in the production process of electronics, medicine, aerospace or other special industries, theoretical pure water with a conductivity of 0.055 μ S/cm (resistivity of 18.2 M Ω• cm) is required to achieve the required process water for the product. It is collectively referred to as high-purity water or ultrapure water
At present, the purity of high-purity water produced by people has reached 99.999999%, with impurity content below 0.01mg/L. It almost completely removes the conductive medium in water, and also removes non dissociative colloidal substances, gases, and organic matter in water to a very low level. The salt content of high-purity water is below 0.3mg/L, and the conductivity is less than 0 2μs/cm。
2、 Overview of high-purity water equipment
Our company's high-purity equipment mainly adopts a combined process of RO reverse osmosis pure water equipment and EDI high-purity water equipment. We use stable EDI modules as the secondary desalination equipment after the reverse osmosis equipment, which can produce up to 10-18.2 M Ω CM。
3、 Working principle of EDI module in high-purity water equipment
The EDI module is a continuous electric desalination (EDI, Electro deionization or CDI, continuous electron ionization) technology that uses a mixed ion exchange resin to adsorb cations and anions from water. At the same time, these adsorbed ions are removed through a cation exchange membrane under the action of a direct current voltage. The ion exchange resin in this process is electrically regenerated continuously, so there is no need to use acid or alkali for regeneration. This new technology can replace traditional ion exchange devices and produce ultrapure water up to 18M-CM. EDI can also be described more clearly as follows: EDI uses anion and cation membranes in a symmetrical stacking form, with anion and cation resins sandwiched between the anion and cation membranes, and exchanges anions and cations under the action of DC voltage. Meanwhile, under the action of voltage gradient, water undergoes electrolysis to produce a large amount of H+and OH -, which continuously regenerate the anions and cations in the ion membrane. Due to the continuous exchange and regeneration of EDI, the purity of pure water is increasing, making it easy to produce high-purity water.
3、 Process diagram of EDI high-purity water equipment
Raw water tank → Raw water pump → Dosing device → Multi medium filter → Dosing device → Activated carbon filter → Fully automatic softener → Security filter → Primary high-pressure pump → Primary reverse osmosis system → Intermediate water tank → Secondary high-pressure pump → Secondary reverse osmosis system → Pure water tank → Pure water pump → TOC decomposer → Degassing membrane → Precision filter → EDI device → Pure water tank → Pure water pump → Polishing mixed bed → Membrane filter → Production line water point.
4、 Performance advantages of EDI high-purity water equipment
1. Can continuously and stably produce high-quality pure water without stopping due to resin regeneration;
2. No pollutant emissions, both environmentally friendly and saving investment in waste liquid treatment;
3. The device has a compact structure, occupies a small area, saves space, and also has energy-saving advantages;
4. Factory completed device debugging, with minimal on-site workload and easy on-the-job training;
5. Daily maintenance, simple operation, low labor intensity.
6. The desalination rate is greater than 99.9%, and the efficiency is much higher than two-stage reverse osmosis and simple ion exchange.
5、 Main application industries
Widely used in the microelectronics industry, semiconductor industry, power generation industry, pharmaceutical industry and laboratories, it can also be used as distilled water for pharmaceuticals, water for food and beverage production, feed water for boilers in power plants, and other applications of high-purity water.