How to solve the problem of mixing anion exchange resin and cation exchange resin in polishing resin?

Date of release:2019-01-12 Author: Click:

　　In the ion exchange mixing bed, the anion resin and the anion resin in the polishing resin can not be mixed together for treatment. It is very difficult to mix all the ions together. If problems occur, the water quality will be affected. Therefore, the best way to produce this phenomenon is to add a certain amount of resin to the mixing bed and mix all the resins in a proper amount. This can improve the water quality, but not unlimited mixing, we must pay special attention to their mixing amount, it should be noted that the anion resin should exist in the upper layer, the anion resin in the lower layer.

　　The mixed bed resin with charge of yin and yang can mix in a real sense, but through the experiments of some scholars and scientific researchers, this is not the case. When the resin is mixed, the charge will disappear at any time, and then the wet-true density changes, which affects the mixing of ion exchange resins. The main methods adopted are as follows:

　　I. Air scrubbing method

　　Generally speaking, if people can see a large number of impurities on the resin surface from the microscope, the water level of the exchanger will be lowered to about 300 to 400 millimeters above the resin by this method. The time should not be too long. Ten to fifteen minutes or so can be used to scrub the ion exchange resin continuously until the water is clear.

　　2. Treatment of Polishing Resin by Acid Washing

　　Some impurities, such as iron ions and calcium carbonate, which can not be cleaned by air, can be repeatedly cleaned with hydrochloric acid. However, before pickling, there are certain requirements for water level, roughly 200 to 300 in the resin layer. The cleaning solution is generally EDTA dilute solution.

　　3. Alkali washing method

　　Because the surface contains a lot of protein substances, if the polishing resin enters the surface and forms an oil film on the resin surface, it can prove that the resin has been polluted.