In most water treatment systems in China, the use of mixed bed resin can last for 2 to 10 years. The replacement of mixed bed resin depends on many factors, and often it is not just a matter of replacing the resin that becomes a problem. The influencing factors include the chemical composition of the treated flow, system process and resin type, frequency of regeneration cycles required, hydraulic load of the resin, inlet conditions, and the presence of any extreme process conditions. The mixed bed resin gradually degrades with use, making it difficult to accurately determine how long it must be replaced. For most water treatment systems, resin should only be discarded when the loss of output quality or capacity proves that the cost of re laying is reasonable, which may be important as they include the removal and treatment of old resin, as well as the purchase and installation of new resin.

This includes the amount of resin loss during the backwash cycle, ion capacity loss of 10-20% or more, and insufficient quality in the treatment flow. Nevertheless, the decision to reload should carefully consider the cost. Certain changes in system performance, such as decreased effluent quality, shorter service operation, or higher chemical dosage, can become good indicators for evaluating resins. Some companies provide analytical services to evaluate the salt decomposition ability and physical conditions of resins, and can provide you with reports to compare the performance with new mixed bed resins. Analyze more scientifically and reasonably whether a new mixed bed resin needs to be replaced.