1. Coarse filtration: refers to mechanical filtration, removal of suspended solids in water, colloids, turbidity, chroma, odors, etc.
The main filtering methods include clarification tank, quick filter, sand filter, sand filter, multi-media filter, activated carbon filter, disc filter, high efficiency fiber filter, etc.
2. Fine filtration: the filter membrane made of special materials has a high filtration precision.
It is common to filter the microfiltration membrane and filter element.
3. More than filtration: it is a membrane filtration that removes large molecules and colloids, bacteria and so on.
High filtration accuracy, the most common is ultrafiltration membrane.
4, reverse osmosis: reverse osmosis RO for short, its principle is under the action of raw water at high pressure through the reverse osmosis membrane, the solvent diffusion from high to low concentration in the water so as to achieve the purpose of the separation, purification, concentration.
It is called reverse osmosis because it is in the opposite direction of nature.
5. Ion exchange: all kinds of inorganic salts in the water are ionized to produce Yang and anion, and the cations in the water are replaced by hydrogen ions in the layer of the hydrogen ion exchange agent, which is the principle of desalination of the Yang bed.
The anions in the water are replaced by OH- ions, which is the desalination principle of the negative bed.
The mixing bed is an ion exchange device in which the Yang and anion exchange resin are mixed in a certain proportion and filled in the same exchange column.
Is 6, EDI, electrodialysis and ion exchange desalination technology, electrodialysis and ion exchange of the mixed bed, using ion exchange for deep processing, chemicals without regeneration, with H + and OH - ionization, achieve the goal of regenerative resin.