The core technology of Purolat ion exchange resin in industrial water treatment applications is divided into cationic resin and anionic resin. The cationic resin is further subdivided into sodium type and hydrogen type. The sodium type resin exchanges calcium and magnesium ions in the water. Form sodium ions, making the water soft. Hydrogen resin exchanges calcium and magnesium ions in the water into hydrogen ions to soften the water. The anionic resin contains replaceable hydroxide ions, which can replace acid ions in the water. Using anionic resin and hydrogen-type cationic resin at the same time can turn water into pure water.
Standard working principle of the mixed bed ion exchange resin
The mixed bed ion exchange method is to place the anion and cation exchange resins in the same exchanger and mix them, so it can be seen It is a multi-stage compound bed composed of numerous yin and yang exchange resins staggered. When the salts contained in the water pass through the exchanger, they are exchanged with the resin to obtain high-purity water.
In the mixed bed, since the anion and cation resins are uniform with each other, the exchange reactions of the anions and cations proceed almost simultaneously. In other words, the cation exchange and anion exchange of water are staggered multiple times. Neither H nor OH produced by H-type exchange can accumulate, which basically eliminates the influence of counter ions, and the exchange proceeds more thoroughly. The mixed bed uses an in vivo regeneration method. During regeneration, the different specific gravity of the two bleached mixed bed resins is used. Backwashing is used to completely separate the anion and cation exchange resins. The cation resin is deposited below and the anion resin floats on top. Then the cation resin is regenerated with hydrochloric acid and the anion resin is regenerated with caustic soda.