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Pure water knowledge

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Filtration process of water treatment in pure water equipment

Release date: November 26, 2019 23:36:37

The filtration steps of pure water equipment are as follows:
Water purification: the use of water purification technology to remove a large number of organic components, heavy metal ions, harmful impurities and bacteria, and retain beneficial trace elements for human body. It is clear, sweet, oxygen rich, and can be directly drunk, called purified water
In addition, the technology of removing heavy metal, inorganic and harmful elements in drinking water by reverse osmosis is called
Activated carbon
Activated carbon is a kind of carbon compound with well-developed micropores, with extremely rich pore structure (up to 1000 square meters per gram), so it has strong adsorption performance. It is one of the most common water purification materials used in water treatment. It can remove the color, odor, organic matter and residual chlorine in water, and improve the taste of water
Microfiltration
The filtration precision is generally in the range of 0.03-15 μ m. It is a kind of membrane process with static pressure as the driving force and the sieving effect of mesh filter medium. The microfiltration membrane has a relatively neat and uniform porous structure. Under the action of static pressure difference, the particles smaller than the membrane pore pass through the membrane, and the particles larger than the membrane pore are intercepted on the membrane surface, so that the components of different sizes can be separated
The common PP filter element and ceramic filter element belong to the category of microfiltration
The filtration precision is between microfiltration and nanofiltration, and its pore size ranges from 0.002 μ m to 0.1 μ m. It is a kind of differential pressure membrane separation technology. Under the action of pressure, raw water is filtered from the high pressure end to the low pressure end. The ultrafiltration can generally remove the rust, sand, colloid, bacteria, macromolecular organic matters and other harmful substances in the water, It is the core component of mineral water and mountain water production process
Nanofiltration
Nanofiltration membrane is between reverse osmosis membrane and ultrafiltration membrane. Its characteristic is that it can only remove solute particles with a diameter of about one nanometer, MWCO with a molecular weight of 100-1000 MWCO is mainly used to remove hardness components, trihalomethane intermediates, odor, color, pesticides, synthetic detergents, soluble organic compounds and evaporation residues. It still has high desalination performance under very low pressure. Softening and desalting of high hardness water is the largest application field of nanofiltration membrane
reverse osmosis
Reverse osmosis technology is a kind of ultra-high precision membrane separation technology using pressure difference developed by the United States in the early 1960s. Its main principle is to add a higher pressure than the natural osmotic pressure on one side of the raw water, reverse the natural osmosis direction, and push the original pressure to the other side of the RO membrane for pure water, which is the opposite process of osmosis in nature
The precision of reverse osmosis filtration is about 0.00001 micron. Theoretically, it can filter almost all impurities (including harmful and beneficial) in water, and only allow water molecules to pass through. It is generally used for the manufacture of drinking pure water, industrial ultrapure water and pharmaceutical ultrapure water. The reverse osmosis technology needs to back pressure the raw water. The reverse osmosis membrane can be backwashed by using the control system to prolong the service life of the membrane
KDF is the abbreviation of cadfield. It is a kind of high purity copper and zinc alloy. It can remove up to 99% chlorine and water capacity of lead, mercury, nickel, chromium and other fusible metals in water by electrochemical oxidation-reduction. It is effective in controlling the growth of bacteria, fungi, dirt and algae. It can improve the pH value of water to a certain extent, Reduce mineral crystallization to prevent scaling
  
Pure water equipment Application range:
Preparation of space water, purified water, distilled water, etc;
Water for alcohol manufacturing and alcohol reduction;
Preparation of water for pharmaceutical and electronic industries;
Concentration, separation, purification and water preparation of chemical process;
Desalting soft water of boiler make-up water
Desalination of seawater and brackish water; water and wastewater treatment in papermaking, electroplating, printing and dyeing industries.