Some clients inquiry how to do regeneration of activated alumina.
How to do regeneration of activated alumina?
In the drying of activated alumina, regeneration of activated alumina is necessary. Generally, it uses hot nitrogen for purging desiccant regeneration. This is because of the strong interaction between water and activated alumina, it is difficult to completely desorb the adsorbed water in other ways. The heating and desorption processes include heating, rinsing and cooling in three steps. The higher the heating temperature, the more complete the desorption regeneration. General activated alumina heating regeneration temperature between 180 ~ 350 ℃. The temperature of the activated alumina tower is generally raised to 280 ° C for 4 hours. Heating rate of about 50 ℃ per hour. Since the high concentration of water vapor at high temperatures can severely damage the structure of the activated alumina, it is necessary to rinse the active alumina bed with nitrogen, air, product gas or other suitable gas while heating. Flushing gas should not contain water, because the amount of water in the flushing gas directly affects the regeneration effect. After the regeneration of the active alumina bed must be cooled before the adsorption operation, with the cooling gas to wash the bed, the gas should also be used to try not to contain water, cold gas flow and adsorption cycle of the same direction. When activated alumina is used for liquids such as propylene drying, it is necessary to first drive the liquid of the activated alumina bed at the time of regeneration, without any dead ends. Otherwise the residual liquid will react or carbonize upon heating, which will seriously affect the efficiency and operating life of the adsorption cycle.
If the activated alumina is good quality, it will improve the life of activated alumina. Certainly, whatever bad or good, you should use desiccant regeneration for future application. But Good quality activated alumina performance could improve the life and drying situation.
If you have any questions on activated alumina regeneration, you could find Zibo Xiangrun Environment Engineering Co.,Ltd.