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RO working principles
Osmosis is a physical phenomenon, when the two kinds of salty water have different concentrations, one side of water with low salinity will permeate the membrane and enter into the other side of water with high salinity, but the salinity won’t permeate the membrane, thus, until the salt concentrations of both sides are equal gradually, it will stop. This process is called natural osmosis. RO is a kind of separation method which is driven by a kind of pressure, with the help of the interception effect of semi-permeable membrane to separate the solvend from solvent in the solution.
RO pure water equipment technology process
Technology process one:
Raw water tank——water delivery pump——filter——activated carbon filter——safety filter——RO——finished product water tank, and equipped with the connection pipe fittings in the equipment room.
Technology process two:
Raw water tank——water delivery pump——filter——activated carbon filter——softened resin tank——RO——finished product water tank, and equipped with connection pipe fittings in the equipment room.
Technology process three:
Water source——pretreatment equipment——water delivery pump——PPF filter——KDF activated carbon filter——chemical antiscalant machine——RO——RO(or UF) components——UV sterilizer——ozone generator——pure water tank——frequency conversion water pump——user
Main features of pure water equipment:
High operation automation
Low pressure water-full, automatic stop
High pressure water-full, automatic stop
Water-pressure proof fluctuation protection
Automatic controller for timing flushing pre-filter materials
IC microcomputer controller for flushing RO membrane automatically
Automatic water quality monitoring
Small working area, low energy consumption, pollution-free, simple technology, good water quality, easy operation and maintenance
Main technical specifications of pure water equipment
Water productivity of single machine: 0.25T/H —100T/H ( optional)
Desalinization rate: RO system＞98% (single-stage/ two-stages optional)
Working pressure:1Mpa —1.2Mpa
Recovery rate: 50%—80%
Product water conductivity of equipment: ＜10μS/cm(on the basis of 500μS/cm of raw water)
High removal rate: soluble salts over 97%, organic substances over 98%, colloids, bacteria and heat sources over 98%.
Standards of water quality conform to: “Standards for The National Domestic Drinking Water”, ”Standards for The World Health Organization Direct Drinking Water”, “health, safety and function evaluation specifications for domestic drinking water quality— RO treatment equipment”
Compositions of RO water treatment system
RO equipment is a set of water treatment equipment which is surrounding RO membrane, a complete set of RO system is composed of pretreatment, RO (membrane filtration), post-treatment and system cleaning.
1. Pretreatment is usually composed of quartz sand filtration device, active carbon filtration device, precision filter device, the full-membrane ultra filtration components can serve as the pretreatment, whose main purpose is to remove the harmful substances, such as suspended substances, particles, colloids, iron-rust, pigments, odor, biochemical organic substances, residual ammonia reduction and pesticide pollution. When the calcium and magnesium ion contents are high in raw water, we should add the softened water device, the main purpose is to protect the following RO membrane from the damage of big particles, then prolong the service life of RO membrane.
2. RO is composed of booster pump, membrane shell, RO membrane, control circuit etc, which is the core part in the whole water treatment system. Whether the product water is good or not, which is also up to the above device. As long as the model selections of membrane and booster pump are correct, the filtration ability of salinity in the water can reach to over 99%.
3. Post-treatment is to further treat pure water produced by RO, if the following device is ion exchange or EDI equipment, then the industrial ultrapure water can be produced, if we want to get the civilian-used direct drinking water, we usually add the post-sterilization device, for example: UV sterilization lamp or ozone generator, then the product water can be drunk directly.
4. In order to ensure the RO system to operate normally, and prolong the service life of RO membrane components, when RO system has been operated for a period of time, which is needed to be flush away the calcium carbonate scale, metallic oxide scale, biological growth (bacteria, fungi, mold etc) substances. When do we need to have a flush? How to flush and which kind of agent can be used? Our company will provide you with a set of technical information for your references and studies.
Application fields of RO pure water equipment
Drinking pure water: real estates, communities, enterprises and public institutions etc
Water for the electronic industry: water for flushing electronic components, such as integrated circuit, silicon ship, display tubes
Water for pharmaceutical industry: large volume transfusion, injection, tablets, biochemical products, equipment cleaning etc
Water for chemicals industry: chemical circulating water, chemical products and so on
Boiler makeup water of the electricity industry: thermal power boiler, low-pressure boiler power system in the factories and mines
Water for food industry: drinking pure water, beverage, beer, white wine, health care products etc
Sea water desalinization: islands, ships, offshore drilling platforms, brackish water areas
Water for ultrasonic cleaning: computer fittings, special materials, precision machinery, all of them need ultrasonic cleaning line with high cleanliness
Water for the electroplating industry, water for cleaning workpieces, water for tank liquor
Water for other technologies: automobiles and appliances coating, glass coating, cosmetics, fine chemical products and so on.
