Cosmetics Automatic Reverse Osmosis Dialysis Machine, Saltine Water Reverse Osmosis Water Purification Machine

Product Description

RO REVERSE OSMOSIS WATER TREATMENT

Working principle:

Primary process is quartz sand multi-medium filter, mainly used to remove hazardous substances over 20um sediments in the water, e.g. manganese, corrosions, colloidal materials, mechanical impurities, suspended solids etc Secondary process is active carbon filter, mainly to remove pigments, peculiar smells, biochemical organics in the water, to lower the residual chlorine value, remove pesticides and other harmful pollutants in the water. Tertiary process is cationic resin soften of water, mainly to eliminate the hardness of water. Quaternary process is 5micrometer aperture ultrafilter to further purify water, optimize the turbidity and chromaticity of water to accord with the inlet water requirements of RO system. Normal tap water can reach a conductivity of below 10 µs/cm after RO reverse osmosis filtration, the desalinization rate is between 90-99%. For lower conductivity, or conductivity of raw water is beyond 500 µs/cm, secondary reverse osmosis can be introduced, the conductivity of outlet water is under 5 µs/cm. With EDI continuous deionization and anion-cation exchange mixed bed, the conductivity will be under 1 µs/cm.

Product Description:

Use a semipermeable membrane which can only let through water to separate water and another solution containing solutes. Then there is a pressure between two sides of the membrane, known as the osmotic pressure. When pressure on the water side is higher, water molecular on the water side will automatically go through the membrane to the solution side, and liquid level of the solution side rises, this is what we call osmosis. When the liquid level rises to a certain height, the pressure on two sides of the membrane reaches a balance, the rise stops. If the solution side is added an extra, the water molecules will be squeezed to water side, which is exactly the opposite way of osmosis, we call it reverse osmosis (RO).As we can see from the RO process, due to the pressure, water molecules in the solution pass into the pure water side, volume of pure water increases, while the solution itself is concentrated. The RO membrane we use in this equipment is a semi-permeable helix type membrane. When raw water is sent to the RO membrane under certain pressure, water molecular go through the micro-size pore in the membrane, pure water get collected, and the impurities in raw water, such as soluble solids, organic matter and bacteria, are stopped by the RO membrane.

How Do I Know Which Size Unit to Buy?

General guidelines for modeling an RO system to take into consideration are the silt density index (SDI) measurement of the feed water after pretreatment. Derived from experien- ce, limits on permeate flux and element recovery for different types of waters are based on correlation of the SDI value with membrane fouling and mineral content with element re-covery, respectfully, for different types of waters. These ge- neral limits shown in Table 1 below serve as boundary condi-tions when designing a RO system. A system designed with high permeate flux rates for example is likely to experience higher fouling rates and more frequent chemical cleanings. Due to high salinity (>36,000 ppm TDS), seawater system de-signs are further limited by the osmotic pressure and durabi- lity of the membrane elements.