Chemical industry pure water equipment

Industrial water equipment by the pretreatment system, polishing system, after-treatment system consists of three major components. After the raw water pretreatment system through sand filters, activated carbon units, water softener units, so that the suspended solids (particulate matter), impurity content colloids, organics, hardness, microbes greatly reduced in order to reduce the subsequent reverse osmosis, fine mix processing load bed polishing system, extending its life. Quartz sand quartz sand water filtration unit plays the filtering effect, like water infiltration into the ground through the gravel, like those suspended matter in the water block down, mainly for those fine suspended solids, refining quartz sand filter is usually into the water pure water, high pure water, domestic water treatment, drinking water and other deep processing. The large surface area of ??activated carbon, and covered with a very small aperture (10 to 30 angstroms) pores of organic colloids, chlorine, iron and other significant adsorption filtered role. Desktop water machines, water purifiers and other commonly used 10-inch / 20-inch carbon filter. Large water unit commonly used fiberglass / stainless steel charcoal canister. Softener unit and medium-sized water systems often use automatic water softener to remove calcium and magnesium ions in the raw water. Automatic softener from sodium ion resin tank, regeneration salt boxes and multiple control valves, process control can be set to run automatic regeneration (time-type / flow type two control modes), when recycling siphon principle of absorption of salt, and then injection of the salts, the regeneration time is usually 2 hours. Small desktop machines generally use water 10-inch / 20-inch soft resin filter to reduce the raw water hardness. Reverse osmosis unit RO (Reverse Osmosis) gauge difference is the use of reverse osmosis technology driven membrane filtration technology, research and aerospace technology from the sixties of the twentieth century, the United States, gradually converted to civilian use, has been widely used in scientific research , medicine, food, beverage, water desalination and other fields. RO reverse osmosis membrane pore size as small nanometer (1 nm = 10-9 m), at a certain pressure, H2O molecules through RO membrane, and inorganic salts in the source water, heavy metals, organics, colloids, bacteria, viruses, etc. impurities can not pass RO membrane, so that you can pass through the water and concentrated water through the strict area can not be separated. RO membranes charged ions, colloids, bacteria and molecular weight greater than 300 dalton of organic substances (including heat) removal up to 99% of low-cost ion (NA +, K +) removal rate of 95%, when the source water conductivity <3505 ? s / cm, RO water conductivity generally ≤55? s / cm, in line with national levels of water standards. Then after the atomic level ion exchange column loop filter, the water rate was 18.2MΩ.cm. Reverse osmosis is up to 90% to 99% removal of impurities most economical method, but also the best reagent grade ultrapure water system before treatment. Key reminder RO membrane filtration capacity influenced by water temperature, the most suitable water temperature is 25 ℃ ~ 30 ℃, the temperature drops 1 ℃, RO membrane water production decreased about 3%, when the water temperature is approaching 0 ℃, RO membrane will stop water production. Filled with inner purification column unit Cartridge Rohm and Haas / Dow UP produced nuclear grade mixed bed resin, when the raw water through the purification column, water and cation resin in the cation H + exchange, the water in the anion resin anion OH - ion exchange, into the water after the exchange of H + and OH- will immediately generate a combined H2O, so that the ions in the raw water to be removed, the highest of its water resistivity up 18.3 MΩ.cm.