1, pre-treatment by the quartz sand filter, activated carbon filter, automatic water softener, precision filters (our use of automatic control valve head), you can also choose the ultra-filtration system as a pre-treatment, but usually the cost of the project is higher. The main purpose of pretreatment is to remove sediment, rust, colloidal substances, suspended solids, color, odor, biochemical organic matter contained in the raw water. When the raw water hardness is high, you can choose automatic water softener, which effectively protects the reverse osmosis membrane, thereby extending the service life of the reverse osmosis membrane.
2, reverse osmosis host is mainly composed of high-pressure pumps, membrane shells, imported reverse osmosis membrane components, online instrumentation, control and electrical components. As long as the number of membrane and pump type selection is appropriate, reverse osmosis host desalination rate and water production can reach the rated target, water conductivity can be guaranteed in ≤ 10us.
CM below, (raw water conductivity is less than 500us/cm, working temperature: 1 ~ 40 ℃)
3, post-processing part of the reverse osmosis of pure water for further deepening of the treatment to produce Ultrapure water, usually ion exchange mixed-bed equipment or EDI equipment, according to customer requirements, the water resistance rate can reach 18.2MΩ.CM, if it is applied in the direct drinking water process, plus sterilization devices can be, usually for the ultraviolet sterilizer or ozone generator, so as to make the production of water to meet the standard of direct drinking.
The exchange reaction takes place in the pure chemistry chamber of the module, where the anion-exchange resins exchange their hydroxide ions (OH) for the anions (e.g., chloride ions, Cl) in the dissolved salts. Correspondingly, the cation exchange resins exchange their hydrogen ions (H) for cations (e.g., Na) in the dissolved salts.