How to use activated alumina and molecular sieve together

The combination of activated alumina and molecular sieve is as follows: Under normal circumstances, in situations where the drying effect is required to be high, activated alumina can be used for pre-drying first, and then molecular sieve can be used to eliminate residual moisture. This can extend the service life of the molecular sieve and enhance the drying effect. Specifically, activated alumina has the best water absorption rate when the water content is relatively high, and it has high strength and is not easy to pulverize, while the molecular sieve has the best adsorption rate when the relative humidity is low. Therefore, the combination of the two can give full play to their respective advantages and achieve the best drying effect.

In addition, during the specific operation, activated alumina balls can be first loaded at the bottom of the tank of the dryer as a protective layer, and pre-drying treatment can be carried out at the same time, and then deep adsorption drying treatment can be carried out through the molecular sieve bed. The upper layer of the molecular sieve, that is, the tank body, will also be filled with part of the activated alumina as a protective layer of the molecular sieve. This can not only protect the molecular sieve, avoid the loss caused by de-powdering, and extend the service life of the molecular sieve, but also enhance the drying effect and eliminate the residual moisture in the gas after the activated alumina adsorbs and dries.