Medical equipment introduction - the shenyang ultra-pure water water treatment equipment - shenyang ultra-pure water equipment - shenyang medical laboratory equipment - shenyang special pure pure water
Medical EDI ultra-pure water works. Equipment
High purity for many industrial engineering water is very important, for instance: the semiconductor industry and pharmaceutical industry. Before the industrial water is obtained by ion exchange. However, membrane system and membrane process as pretreatment process or replacement of ion exchange system is more and more popular. If electro-deionization (EDI) process of membrane system can be very clean and remove minerals can work continuously. And, in the process, mechanical film than ion exchange system doesn't need much more simple, acid and alkali neutralization regeneration and wastewater. EDI process is membrane process is one of the fastest growing business. EDI is the reverse of the flume with special electrodialysis (ED), the water flow path of filled with mixed bed ion exchange resin. EDI is mainly used for the total quantity of dissolved solids (TDS) for 1-20mg/L water into 8-17 trillion ohms for 380-volt ac pure water. Usually by reverse osmosis (water) RO. ED and EDI is used as the energy of salt dc. As shown in figure, the solution is contrary to with ion electrode charge. Use of anion and cation choice between the electrodes of membrane into small room, space between the small room that can remove the half salt, and in other small indoor enrichment. Give little room, water supply and water can build continuous demin-eralizing process. (figure 1),
ED and EDI using film is made by ion exchange resin, usually in order to increase the intensity sheets in a layer on resin. ED and EDI physical difference (see chart 2) mainly lies in the room filled with salt is mixed bed ion exchange resin beads.
Transfer of ion is divided into 2 steps. First ion spread to the ion exchange resin in electric, then arrive through resin. Because of this, the current will flow resistance of ion exchange resin. The concentration of no EDI resin. EDI water ionization function to understand its USES EDI and must understand the ionization. "" After the water will become hydrogen ions and hydroxyl ions. If the water is used in combination ion by separation, can form the acid and alkali. In the ED and EDI, if current over mobile dissolved salt energy, water will ionization. In the process of ED in the anion exchange membrane lower current occurs when the water, yet find ionization. In the current system of ED too will cause water ionization. Hydrogen ions in dc field under the effect of ion exchange resin, and entered in that with bicarbonate reacts CO2. It reduces the water's pH value. Hydroxyl ions into the anion exchange membrane and bicarbonate carbonate ions reaction. Ca2 +, if water existing Ca2 + will be part of condensed from entering anion exchange membrane. Anion exchange membrane and cannot be 100% blocking cationic. This makes the internal CaCO3. If the water without calcium carbonate, or hydrogen diffusion hydrogen ion will pass through the circulation and concentrated cation exchange membrane and enter the room. But OH - through anion exchange membrane into the enrichment. Both in the room with concentrated in water. (figure 3)
In EDI pool current of ion exchange is through the beads. So in ion exchange bead touch each other place and exchange and membrane touch, if have large current, water will ionization. In the current strong, ion exchange resin by acid or alkali regeneration. Together with the salt solution concentration in the room into H + ions and OH - for water. EDI water applicable technology, medicine, medical ultra-pure water, medicine ultra-pure water engineering, pure water, medicine, pharmaceutical ultra-pure water equipment, also can choose pure water machine mixed bed, mixed bed equipment, PET.