Introduction to each system of reverse osmosis water treatment equipment
2021-05-19 03:21:39
Nanjing Shuaibo takes you through the principles of reverse osmosis water treatment equipment and the composition of each system.
Ultrapure water production principle of reverse osmosis water treatment device generally <br> <br> raw water pretreatment system, reverse osmosis purification system, the processing system consists of three parts after ultra purification. The purpose of the pretreatment is to make the raw water reach the water inflow requirement of the reverse osmosis membrane separation module and ensure the stable operation of the reverse osmosis purification system. The reverse osmosis membrane system is a cost-effective purification method that removes more than 98% of ions, organic matter and 100% microorganisms (theoretically) in raw water at one time. The ultra-purification post-treatment system further removes trace ions and organic impurities remaining in the reverse osmosis pure water through various integration techniques to meet the requirements of the final water quality index for different uses.
System composition:
Water pretreatment system <br> <br> pretreatment system reverse osmosis water treatment device usually consists of polypropylene fibers (PP) and activated carbon filters (AC) filter. A softened resin filter is also required for the raw water having a higher hardness. PP filter can effectively remove 5μm of mechanical particles impurities, rust and large gels in raw water, and protect subsequent filters. It is characterized by large amount of dirt and low price. AC activated carbon filter can effectively absorb residual chlorine and some organic matter and colloid in raw water, and protect polyamide reverse osmosis composite membrane from residual chlorine oxidation. The softening resin can remove most of the calcium and magnesium ions in the raw water, prevent the fouling of the surface of the subsequent RO membrane, and improve the recovery rate of water.
Reverse Osmosis (RO) is a high-tech membrane separation technology with pressure difference as the driving force. It has the characteristics of high resolution, no phase change, simple and high efficiency. The "pore size" of the reverse osmosis membrane was as small as nanometers (1 nm = 10-9 m), and no "filtered" pores on the surface could be seen under scanning electron microscopy. Under the operating pressure higher than the osmotic pressure of the raw water, the water molecules can reverse osmosis through the RO semi-permeable membrane to produce pure water, and a large amount of inorganic ions, organic matter, colloids, microorganisms, pyrogens and the like in the raw water are retained by the RO membrane. Generally, when the conductivity of raw water is <200μS/cm, the conductivity of the first-stage RO pure water is ≤5μs/cm, which is in line with the laboratory three-level water standard. In areas with high raw water conductivity, in order to save the replacement cost of the subsequent mixed bed ion exchange resin and improve the quality of pure water, customers may consider selecting a two-stage reverse osmosis purification system. The conductivity of the second-stage RO pure water is about 1~5μS/cm. The quality of raw water is related.
Ultra-purification post-treatment system Mixed bed ion exchange purification column Mixed bed ion exchange purification column is prepared by mixing anion exchange resin and cation exchange resin in proportion. The cation exchange resin uses its H+ exchange to remove cations from the water. The anion exchange resin uses its OH-exchange to remove the anions in the water. The H+ and OH- exchanged in the mixed bed resin combine to form H2O, so the mixed bed ion exchange purification column can be used. To deeply remove trace ions remaining in RO pure water. Mixed bed ion exchange purification columns in small laboratory ultrapure water are typically used at one time. Yongjieda mixed bed ion exchange purification column adopts imported nuclear grade mixed bed resin, and its water production resistivity can reach 18.2MΩ.cm.
EDI device continuous electrodeionization EDI (abbreviation of Electrodeionization) is the adsorption of anion and cation in water by mixed bed ion exchange resin, and these adsorbed ions are continuously passed through the anion exchange membrane under the action of DC voltage. The process of removal. This new technology can replace traditional ion exchange (DI) and produce ultrapure water above 10MΩ.cm. The advantage of EDI deep desalting is that it can run stably for a long time without regenerating yin and yang resin with acid and alkali. It is very suitable for ultra-pure water central preparation system with water production capacity above 100L/h. The water quality is stable and the operating cost will be greatly reduced. TOC also Will be lower and more stable. The Yongjieda EDI unit usually has a water production resistivity of about 15~18MΩ.cm.
In addition to pyrogen ultrafiltration membrane ultrafiltration depyrogen has been widely used in the modern pharmaceutical industry. The ultrafiltration (UF) membrane has a pore size between reverse osmosis and microfiltration (about 0.01 to 0.1 μm), which is usually expressed by the small molecular weight cutoff of zui. Yongjieda's pyrogen ultrafiltration membrane uses a polysulfone membrane with a molecular weight cut-off of 5000 Daltons to completely remove pyrogens in water (the small molecular weight of which is usually greater than 7000) and various microorganisms.
Ultraviolet germicidal lamp and TOC UV disinfector UV germicidal lamp are sterilized by ultraviolet radiation of 254nm wavelength, which can effectively destroy the DNA molecules of microorganisms and form TT dimers and cannot reproduce. It is a common and effective sterilization method for air and water. The TOC UV Digestor uses UV lamps that can simultaneously generate 185nm/254nm dual wavelengths. 185nm UV rays can generate ozone in the air to sterilize and deodorize. Hydrogen radicals are generated in water, which can rapidly oxidize trace organic substances in pure water. For CO2, the purpose of removing TOC is achieved.
The final filter with a 0.22 um end filter has a complete filtration of bacteria, fungi and spores, resin chips and all micron-sized contaminants. The terminal filter forms include a hollow fiber type, a PP barrel filter, a capsule filter, a needle type filter, etc., and the film material is polypropylene, nylon, polyvinylidene fluoride or the like.
Ultrapure water production principle of reverse osmosis water treatment device generally <br> <br> raw water pretreatment system, reverse osmosis purification system, the processing system consists of three parts after ultra purification. The purpose of the pretreatment is to make the raw water reach the water inflow requirement of the reverse osmosis membrane separation module and ensure the stable operation of the reverse osmosis purification system. The reverse osmosis membrane system is a cost-effective purification method that removes more than 98% of ions, organic matter and 100% microorganisms (theoretically) in raw water at one time. The ultra-purification post-treatment system further removes trace ions and organic impurities remaining in the reverse osmosis pure water through various integration techniques to meet the requirements of the final water quality index for different uses.
System composition:
Water pretreatment system <br> <br> pretreatment system reverse osmosis water treatment device usually consists of polypropylene fibers (PP) and activated carbon filters (AC) filter. A softened resin filter is also required for the raw water having a higher hardness. PP filter can effectively remove 5μm of mechanical particles impurities, rust and large gels in raw water, and protect subsequent filters. It is characterized by large amount of dirt and low price. AC activated carbon filter can effectively absorb residual chlorine and some organic matter and colloid in raw water, and protect polyamide reverse osmosis composite membrane from residual chlorine oxidation. The softening resin can remove most of the calcium and magnesium ions in the raw water, prevent the fouling of the surface of the subsequent RO membrane, and improve the recovery rate of water.
Reverse Osmosis (RO) is a high-tech membrane separation technology with pressure difference as the driving force. It has the characteristics of high resolution, no phase change, simple and high efficiency. The "pore size" of the reverse osmosis membrane was as small as nanometers (1 nm = 10-9 m), and no "filtered" pores on the surface could be seen under scanning electron microscopy. Under the operating pressure higher than the osmotic pressure of the raw water, the water molecules can reverse osmosis through the RO semi-permeable membrane to produce pure water, and a large amount of inorganic ions, organic matter, colloids, microorganisms, pyrogens and the like in the raw water are retained by the RO membrane. Generally, when the conductivity of raw water is <200μS/cm, the conductivity of the first-stage RO pure water is ≤5μs/cm, which is in line with the laboratory three-level water standard. In areas with high raw water conductivity, in order to save the replacement cost of the subsequent mixed bed ion exchange resin and improve the quality of pure water, customers may consider selecting a two-stage reverse osmosis purification system. The conductivity of the second-stage RO pure water is about 1~5μS/cm. The quality of raw water is related.
Ultra-purification post-treatment system Mixed bed ion exchange purification column Mixed bed ion exchange purification column is prepared by mixing anion exchange resin and cation exchange resin in proportion. The cation exchange resin uses its H+ exchange to remove cations from the water. The anion exchange resin uses its OH-exchange to remove the anions in the water. The H+ and OH- exchanged in the mixed bed resin combine to form H2O, so the mixed bed ion exchange purification column can be used. To deeply remove trace ions remaining in RO pure water. Mixed bed ion exchange purification columns in small laboratory ultrapure water are typically used at one time. Yongjieda mixed bed ion exchange purification column adopts imported nuclear grade mixed bed resin, and its water production resistivity can reach 18.2MΩ.cm.
EDI device continuous electrodeionization EDI (abbreviation of Electrodeionization) is the adsorption of anion and cation in water by mixed bed ion exchange resin, and these adsorbed ions are continuously passed through the anion exchange membrane under the action of DC voltage. The process of removal. This new technology can replace traditional ion exchange (DI) and produce ultrapure water above 10MΩ.cm. The advantage of EDI deep desalting is that it can run stably for a long time without regenerating yin and yang resin with acid and alkali. It is very suitable for ultra-pure water central preparation system with water production capacity above 100L/h. The water quality is stable and the operating cost will be greatly reduced. TOC also Will be lower and more stable. The Yongjieda EDI unit usually has a water production resistivity of about 15~18MΩ.cm.
In addition to pyrogen ultrafiltration membrane ultrafiltration depyrogen has been widely used in the modern pharmaceutical industry. The ultrafiltration (UF) membrane has a pore size between reverse osmosis and microfiltration (about 0.01 to 0.1 μm), which is usually expressed by the small molecular weight cutoff of zui. Yongjieda's pyrogen ultrafiltration membrane uses a polysulfone membrane with a molecular weight cut-off of 5000 Daltons to completely remove pyrogens in water (the small molecular weight of which is usually greater than 7000) and various microorganisms.
Ultraviolet germicidal lamp and TOC UV disinfector UV germicidal lamp are sterilized by ultraviolet radiation of 254nm wavelength, which can effectively destroy the DNA molecules of microorganisms and form TT dimers and cannot reproduce. It is a common and effective sterilization method for air and water. The TOC UV Digestor uses UV lamps that can simultaneously generate 185nm/254nm dual wavelengths. 185nm UV rays can generate ozone in the air to sterilize and deodorize. Hydrogen radicals are generated in water, which can rapidly oxidize trace organic substances in pure water. For CO2, the purpose of removing TOC is achieved.
The final filter with a 0.22 um end filter has a complete filtration of bacteria, fungi and spores, resin chips and all micron-sized contaminants. The terminal filter forms include a hollow fiber type, a PP barrel filter, a capsule filter, a needle type filter, etc., and the film material is polypropylene, nylon, polyvinylidene fluoride or the like.
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