Demystifying: the reason why ultrapure water machine silicon exceeds the standard

     Ultrapure water machine is a necessary equipment for many chemical and biological experiments. As an important tool for source water treatment, it can remove sediment, colloid, rust, algae, heavy metal ions, suspended solids, etc. in water. To remove all of these, pretreatment systems, reverse osmosis membranes, ultra-purification packages, etc. are required. It uses pretreatment, membrane separation technology, ultra-purification solution and its follow-up solution to basically completely remove the conductive medium in the water, and remove the non-dissociated colloidal solution chemicals, vapors and organic compounds in the water. Water purification equipment to very low levels. Ultra-pure water machines can be divided into food, clothing, housing, and food-type water purifiers (household water purifiers), laboratory water purifiers (also called ultra-pure water machines), industrial production water purifiers and large and medium-sized industrial production water purifiers. , microorganisms, pharmaceutical industry and other industries are widely used.

For a good ultrapure water machine, silicon is qualified during the life of consumables. At the end of the use of consumables, there will be a short time when the resistance is qualified but the silicon exceeds the standard. Why is this, let's analyze it carefully.

The secret is that when the ion exchange tree finger is nearly exhausted, the silicon ion is the first ion to pass through the resin column. In the case of the standard configuration of the purification column, both silicon and boron can be detected in the product water before the resistivity drops significantly (indicating that the purification column is depleted). At a later point when the purification column will be exhausted, a large amount of silicon will dissolve into the product water in a short time. In this case, although the purified water contained a very high concentration of silicon, the electrical resistivity—a proxy for water quality—showed acceptable water quality. The dissolution of this silicon is because the mixed bed ion exchange tree means that the efficiency is very low, and the dissolution of silicon from the resin indicates that it is time to replace the ion exchange resin.

The above is the reason why the silicon of the ultrapure water machine exceeds the standard. The user has a certain understanding of some details of the equipment to better use the equipment.