Main functions of water purification equipment:
1. Multi-media filter
Multi-media filter tanks are mostly filled with quartz sand, anthracite and manganese sand and other filter media. Its role is mainly to reduce water turbidity, and can remove a large number of bacteria, viruses, organic matter in the water. Thus creating favorable conditions for the subsequent disinfection process. Manganese sand for iron, manganese removal effect is remarkable.
2. Activated carbon filter tank
Activated carbon has a large number of micropores and a huge surface area, with a strong physical adsorption capacity. It can effectively adsorb impurities in water, especially organic matter and microorganisms. Activated carbon surface formation of oxygen-containing catalytic oxidation and chemical adsorption function, can remove some of the metal ions in the water. Activated carbon has a strong adsorption effect on the residual chlorine remaining in the water, in order to protect the downstream stainless steel equipment and piping surfaces and to meet the requirements of the latter water treatment unit into the water.
3. Automatic backwash, regeneration softening tank
The softening tank is filled with sodium cation exchange resin. Through the ion exchange reaction of the resin, it can reduce the hardness of water and prevent calcium and magnesium ions from combining with carbonate and sulfate ions, which can form scale in the back-order water treatment equipment or pipeline.
4. Precision filter
Precision filters, also known as security filters, filtration accuracy is generally 5 μm. Its role is to retain all the particles larger than 5 μm material to meet the reverse osmosis into the water requirements.
5. Reverse osmosis
The key to the application of reverse osmosis technology is to play a role in removing salt reverse osmosis membrane performance. Reverse osmosis membrane is a semi-permeable membrane that only allows water molecules to pass through and does not allow solutes to pass through. In addition to applying the principles of reverse osmosis and reverse osmosis, reverse osmosis technology also utilizes the selective adsorption of the membrane and the screening mechanism against organic matter. The pore size of the reverse osmosis membrane is mostly less than or equal to 10×10-10m, and its separation object is the organic matter in solution that is in the ionic range and has a molecular weight of a few hundred or so. It can filter out a variety of bacteria, such as one of the smallest bacteria Pseudomonas aeruginosa (3000 × 10-10m), can also filter out a variety of viruses, such as influenza virus (800 × 10-10m), meningitis virus (200 × 10-10m), but also filter out the pyrogens (10 ~ 500 × 10-10m). This is a great concern for pharmaceutical water.
Because of the reverse osmosis operation process is simple, high salt removal efficiency, the use of water in the pharmaceutical process, but also has a high ability to remove the pyrogens, but also more economical, the pharmaceutical water process has become the first choice of water treatment unit. Reverse osmosis technology is not only used in the preparation of purified water in the process, the use of reverse osmosis can also be manufactured with the quality of water for injection, the United States Pharmacopeia from the nineteenth edition of the beginning of the law has been included in the preparation of water for injection of one of the legal methods.
6. Sterilization system
A, oxygen and ultraviolet ground orderly combination for disinfection / sterilization. Ozone is a strong oxidizing agent, and its oxidizing power is second only to fluorine among natural elements. Ozone can oxidize and decompose the glucose oxidase enzyme necessary for the internal oxidation of glucose in bacteria, but also can directly interact with bacteria and viruses, destroying cells, ribonucleic acid, decomposing DNA, RNA, proteins, lipids, and polysaccharides and other macromolecules, so that the bacterial metabolism of the growth of material and reproduction process is destroyed. In water treatment for deodorization, decolorization, sterilization, removal of phenol, cyanide, iron, manganese and reduce COD, BOD and so on have remarkable effect. UV light can reduce the rate of generation of new colonies in the pretreatment system of the water system, located in the ozone after the 254nm UV lamp can be used for both disinfection and removal of ozone residue.
B. Circulation back to prevent bacterial growth. In the purified water system in the pretreatment system, water system and water system are equipped with circulating water circuit, in the holidays or evening without water; purified water tank full of water; water conductivity exceeds the standard, the water within the system to maintain a certain degree of circulation, and then supplemented with UV or ozone / UV sterilization to prevent bacterial growth, if necessary.
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