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2023-07-04 0 Views

How ion exchange columns work

The ion exchange column is the equimolar molarity reaction between the ions in the water and the ions on the resin in the ion exchange column. A traditional displacement water treatment process. FRbTextile Testing Instruments, Testing Equipment Manufacturer


The ion exchange column is mainly a method of purifying the water (liquid) by exchanging the ions in the ion exchange resin with some ions in the raw water (liquid) to remove them. FRbTextile Testing Instruments, Testing Equipment Manufacturer


It is widely used in chemical, electronic, pharmaceutical, textile and electroplating industries for making pure water, softening hard water, decolorizing and extracting medicines and foods as well used for the recovery of important chemical raw materials and waste water treatment, etc. FRbTextile Testing Instruments, Testing Equipment Manufacturer


The principle of ion exchange columnFRbTextile Testing Instruments, Testing Equipment Manufacturer


With the ion exchange method, cations and anions in the ionic state in the water can be removed and be removed Sodium chloride (NaCl) provides arepresent inorganic salts in water, and the basic reaction of water desalination can be expressed by the following equation:FRbTextile Testing Instruments, Testing Equipment Manufacturer


1. Cation exchange resin: R—H+Na+→ R-Na+H+FRbTextile Testing Instruments, Testing Equipment Manufacturer


2. Anion exchange resin: R-OH+CL-→R-CL+OH+

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The general reaction formula of cation and anion exchange resin can be written as: FRbTextile Testing Instruments, Testing Equipment Manufacturer


RH+ROH+NaCL – RNa+RCL+H2OFRbTextile Testing Instruments, Testing Equipment Manufacturer


It can be seen that the Nacl in the water was absorbed by H+ and OH-, respectively, and the reaction product is only H2O, so that the effect of removing salt in the water is achieved. FRbTextile Testing Instruments, Testing Equipment Manufacturer


3. Mixed ion exchange column (mixed bed): FRbTextile Testing Instruments, Testing Equipment Manufacturer


The mixed bed is filled with positive and negative resins in a certain ratio (generally 1):2 , so that the cathodic and cathodic resins can reach the end point of exchange at the same time and regenerate at the same time) are loaded into the mixing column, in fact, it combines H+ and OH- into waterhe to instantaneously generate water molecules (H2O) with a low degree of ionization;FRbTextile Testing Instruments, Testing Equipment Manufacturer


During the exchange of the cation bed or yin bed, there is almost no reverse exchange phenomenon, so the exchange reaction can be carried out very thoroughly can. Therefore, the sewage quality of the mixed bed is better than that of the double bed, which consists of yang and yin beds in series. Due to the achievable water quality, highly pure final water can be generated. FRbTextile Testing Instruments, Testing Equipment Manufacturer

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