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Product details
1、 Overview
It is the abbreviation for mixed ion exchange column, which is a device designed for ion exchange technology. The so-called mixed bed refers to the mixing and filling of a certain proportion of cation and anion exchange resins in the same exchange device to exchange and remove ions from the fluid. Due to the higher specific gravity of the cation resin compared to the anion resin, the anion resin is on top and the cation resin is on the bottom in the mixed bed. The general ratio of positive and negative resin filling is1：2There are also loading ratios1：1.5You can consider choosing according to different resins. Mixed beds are also divided into in vivo synchronous regeneration mixed beds and in vitro regeneration mixed beds. The synchronous regeneration mixed bed operates and the entire regeneration process is carried out inside the mixed bed. During regeneration, the resin does not move out of the equipment, and the cation and anion resins are regenerated simultaneously. Therefore, fewer auxiliary equipment are required and the operation is simple
2、 Product advantages
1. Excellent effluent quality, effluentpHThe value is close to neutral.
2.The water quality is stable, and short-term changes in operating conditions (such as inlet water quality or composition, operating flow rate, etc.) have little impact on the effluent water quality of the mixed bed.
3.Intermittent operation has little impact on the effluent quality, and the time required to restore the water quality to before shutdown is relatively short
3、 Mixed bed backwashing process
1. After the failure of the mixed bed operation, it is necessary to find a way to separate the anion and cation resins for regeneration. This is a key operational step. In actual production, most hydraulic screening methods are used, which utilize the difference in relative density between anion and cation resins to suspend the resin under backwashing hydraulic pressure. After reaching a certain expansion rate, the resin is allowed to settle down, with the cation resin having a higher relative density settling below and the anion resin having a lower relative density floating above, so that the two resins can be clearly separated. When backwashing and layering, the initial flow rate should be small, gradually increasing the flow rate to
2. Layered mixed bed resin2Secondly, even3The sorting was done later, sometimes by backwashing with compressed air or adding10%Concentrated saline solution and alkaline solution to enhance the layering effect.
3. Layered first, then,Add alkali(3-5%)Regenerated anion resin,Discharge from the bottom,Add acid after rinsing(3-5%),Entering from the bottom,Control the flow rate to discharge from it.
4. After washing,Just mix the water with a larger flow rate.
5. If you need information, you can consult with resin manufacturers or water treatment companies.
6. Ultra pure water equipment uses pre-treatment, reverse osmosis technology, ultra purification treatment, and post-treatment methods to almost completely remove conductive media from water, as well as to remove colloidal substances, gases, and organic matter that do not dissociate from water to a very low level
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