Reverse osmosis
Reverse osmosis technology is mainly through the ultra-low pressure osmosis filtration technology, effectively removing a variety of salts and impurities in water. Reverse osmosis membrane is a semi-permeable membrane that only allows water molecules to pass through and does not allow solutes to pass through. Reverse osmosis technology in addition to the application of the principle of two-stage reverse osmosis, but also utilizes the membrane of selective adsorption and screening mechanism for 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 the solution which is in the ionic range and the molecular weight is about several hundred. 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.
EDI
EDI (Electrodeionization), also known as continuous electrodeionization technology, which scientifically integrated electrodialysis technology and ion exchange technology, through the cation and anion membrane on the cation and anion of the selective permeability of the role of the ion exchange resin on the exchange of ions in the water, in the electric field under the action of the realization of the ion in the water of the direction of migration, so as to achieve the depth of water purification. Migration, so as to achieve the depth of water purification and desalination, and through the water electrolysis of hydrogen ions and hydroxide ions on the loaded resin for continuous regeneration, so the EDI water process does not require acid, alkali chemicals regeneration can be continuous production of high-quality ultrapure water, which has the advantages of advanced technology, compact structure, easy operation, can be widely used in electric power, electronics, medicine, chemical industry, food and laboratory fields, is a green revolution in water treatment technology. It is a green revolution in water treatment technology. This new technology can replace the traditional ion exchange device to produce ultrapure water with resistivity up to 16-18MΩ-CM.
Mixed bed
Mixed bed refers to a system in which water passes sequentially through a cation bed equipped with hydrogen-type cation exchange resin and an anion bed equipped with hydroxide-type anion exchange resin. The hydrogen-type cation exchange bed is used to remove cations from the water; the hydroxide-type anion exchange bed is used to remove anions from the water. The mineral salts in the water are basically removed by the complex bed. In order to obtain better desalination effect, the cation exchange resin is loaded with strong acid in the cation exchange bed, and the anion exchange resin is generally loaded with strong alkali in the anion exchange bed. Mixed bed is also divided into in vivo synchronous regenerative mixed bed and in vitro regenerative mixed bed, mixed bed system set up tank overpressure automatic pressure relief device, to ensure maximum safety of the tank.