01. Coarse filtration
Coarse filtration: refers to mechanical filtration to remove suspended solids, colloid, turbidity, chroma, odor, etc. in water. The main filtration methods are clarifier, fast filter, sand filter, multi-media filter, activated carbon filter, disc filter, high-efficiency fiber filter, etc.
02. Fine filtration
Fine filtration: a filter membrane made of special materials with high filtration accuracy. The most common ones are microfiltration membranes and filter elements.
03. Ultrafiltration
Ultrafiltration: It is a membrane filtration that removes macromolecules and colloids, bacteria, etc. The filtration precision is high, and the most common is the ultrafiltration membrane.
04. Reverse osmosis
Reverse osmosis: The principle is that the raw water passes through the reverse osmosis membrane under the action of high pressure, and the solvent in the water diffuses from high concentration to low concentration to achieve the purpose of separation, purification and concentration. Because it is opposite to the infiltration direction of nature.
05. Ion exchange
Various inorganic salts in water are ionized to generate cations and anions. When passing through the hydrogen-type ion exchanger layer, the cations in the water are replaced by hydrogen ions, that is, the principle of demineralization of the cationic bed; when passing through the OH-type ion exchanger layer, the water Anions are replaced by OH- ions, that is, the principle of demineralization of anion beds.
Mixed bed is an ion exchange device in which cation and anion exchange resins are mixed and packed in the same exchange column according to a certain proportion.
06. EDI
EDI: It is a new desalination process that combines electrodialysis and ion exchange. Taking the advantages of electrodialysis and mixed bed ion exchange, ion exchange is used for advanced treatment, no chemical regeneration is required, and ionization is used to generate H+ and OH- to achieve the purpose of regeneration of resin.
