Yi Wu Bei village home kitchen water purifier

 Dow FILMTEC reverse osmosis membranes are widely used in the world, providing the highest quality of purified water for the home individuals, various communities and industries. Dow reverse osmosis membrane has the lowest failure rate, has the largest installed capacity and the wider use of applications; Dow FILMTECH very low pressure reverse osmosis membrane has the highest throughput and lowest operating pressure, Dow developed a new generation LP Ultra-low film RO elements. Dow membrane element production in the US alone, fully imported products from the technology leader in automated production lines, the diaphragm no patch, desalting layer thicker, can be a strong inorganic acid wash, automatic assembly technology components, finished without pass water test, the real guarantee of a consistent global supply quality. Historical Development folding Edit this section in 1963 in the US city of Minneapolis, Minnesota, Polaris Institute research laid the foundation FilmTec company and FT30 membrane technology. Since then, the institutional development and improvement of products: the original composite membrane, a microporous polysulfone membrane, the first non-cellulose acetate composite film (NS-100), NS-200 and NS-300 composite membranes, ultrafiltration thin fiber dialysis membrane. 1977 in Minneapolis, USA FilmTec company was set up, from, FilmTec company as a leader in composite membrane synthesis technology inventors and technology development and production of composite membranes, guide the development of membrane technology industry. From 1981 to 1984, the company and products has undergone major changes, FilmTec company in 1985 became a wholly owned subsidiary of The Dow Chemical Company. Dow's leading chemical production technology to further enhance the company's overall performance FilmTec membrane products, it has a unique stem cell technology and automated production equipment, FilmTec company's products with high performance consistency, chemically and physically stable resistance and long-term reliability. Works folded edit the film element of the present paragraph Dow reverse osmosis membrane is spiral wound structure, referred to as the roll structure. It is composed by the multi-leaf film bag, each leaf membrane bags made two films opposite the front diaphragm, placed in the product flow path and placed on the membrane surface turbulent flow grid-like inlet conduit between two sheets of composition, The film bags three sides with adhesive seal, the fourth side open to the perforated permeate collection tube. Compared with other element structure, such as a tube, plate and hollow fiber having a uniform flow distribution, high resistance to pollution levels, lower replacement costs, external piping is simple, easy to clean maintenance and design flexibility and many other advantages, become The main form of a film element structure. Dow reverse osmosis membrane composite structure collapsed Dow diaphragm is a composite structure, which consists of three layers (see right) 1, reinforced non-woven polyester material, about 120μm thick; 2, middle polysulfone porous support layer about 40μm thick; 3, polyamide thin separation layer about 0.2μm thick. They were each optimized design and manufacture of each layer in accordance with its functional requirements. 4, the main structural strength of the composite film was provided by the non-woven fabric, which has a hard, smooth surface free of loose fibers. 5, the design of the porous intermediate support structure because as direct composite thin separation layer non-woven fabric, the surface is too irregular, and the porosity is too large, and therefore need to advance in the non-woven fabric coated with a layer of high permeability micro hole polysulfone as the support layer, pore size of about 150 angstroms. 6, thin separation layer is a functional layer of reverse osmosis and nanofiltration process truly separation, Dow FILMTECTM diaphragm compared with any other brand of products, high degree of crosslinking, functional separation layer is thicker and the thickness more uniform, never without pinholes. Its high degree of crosslinking determines the nature of which has a very high physical strength and resistance to chemical and biological degradation of performance. Model Type folded Edit this paragraph Dow FILMTECTM membrane elements have different models, each for different applications and conditions of use: 1, NF270-- medium desalination nanofiltration membrane permeability and hardness, high organic matter removal high water production 2, NF200-- medium hardness transmittance membrane, with high herbicides (such as atrazine net) and TOC removal rate of 3, about NF90--90% removal of salt nanofiltration, with high iron, pesticides, herbicides and TOC removal 4, NF-- process material concentrated by nanofiltration 5, XLE-- ultra-low power (pressure) reverse osmosis element, is mainly used in commercial or large municipal water treatment 6, LP-- tape around ultra-low pressure reverse osmosis elements for a new generation of commercial high rejection rates ultra-low pressure reverse osmosis membrane element 7, BW30HR LE-- new FRP winding high energy consumption brackish water desalination RO element 8, TW30-- tape around standard low pressure reverse osmosis membrane element, is mainly used for commercial water desalination reverse osmosis system is high tap 9, BW30-- FRP winding standard low pressure brackish water reverse osmosis membrane element, the main Support for multi-series high desalination reverse osmosis system 10, BW30LE-- standard low-energy brackish water reverse osmosis element 11, LE-- new low energy brackish water reverse osmosis element 12, RO - Health-stage reverse osmosis element 13 16, SW30-- seawater and salt, HSRO-- thermal disinfection of health-stage reverse osmosis element 14, SG30-- ultra-pure semiconductor-stage reverse osmosis element 15, SG30LE-- low-power ultra-pure semiconductor grade RO elements 17, SW30XLE-- new ultra-low power sea water or brackish water with high salinity (Sea water) reverse osmosis element 18, SW30HR-- standard high rejection rate (single-stage desalination of brackish water (Sea water) reverse osmosis element ) seawater reverse osmosis element 19, SW30HR LE-- new high rejection rate low energy (single-stage seawater desalination) seawater reverse osmosis element purchase and maintenance folded Edit this paragraph desalination water production decline rate and reverse osmosis and nanofiltration systems The most common failure, membrane element inlet conduit clogging and with an increase in the pressure of the components are another typical failure, if desalination water production rate and relatively gently fall, which indicate the presence of a normal fouling system, it It can be dealt with through proper and regular cleaning. Rapid or sudden drop of performance shows that the system is defective or misuse, take early corrective action is necessary, because any delay will lose the opportunity to resume the processing performance of the system, but there will be very low and very high water production product water salinity TDS. Normally recorded operating data standardization and system performance, for early detection of potential problems is necessary, it includes all the instruments properly corrected, there is no accurate data, until the problem might be too late. Once degraded, the first step is to determine the location of the problem and identify the causes of problems to solve the problem, you can use the operating parameters record sheet or some online measuring instrument to be achieved if the system supporting the necessary sampling point or instrument, It can be more effective troubleshooting. Refer to "facilitate future troubleshooting the system design proposal" provides a section, if the system data is insufficient to determine the cause and take corrective action, we must remove one or more of the membrane element from the system for analysis, this performance for the membrane element The analysis includes non-destructive and destructive analysis. Word Tags: reverse osmosis membrane