Design Modelling and the Performance Analysis of a Recycling Drum Dryer for a Salt Adsorbent

Solid desiccants play a major role as well as liquid desiccants today in the dehumidification appliances. Although salt adsorbents have a better moisture adsorbing capacity than organic adsorbents, deliquescence limits their performance. Therefore, the study was carried out to identify a suitable recycling mechanism for salt adsorbent. Damprid one of the commercially developed moisture absorber was used for the experiment. A drum dryer was designed to regenerate Damprid from its hydrate solution. For computational fluid dynamic analysis, ANSYS Fluent fluid flow systems in ANSYS Workbench was used. Simulation results were obtained to determine the temperature and velocity distribution for 3 different RPMs. Experiments were conducted by varying parameters: heat input, drum rotating RPM and liquid spray rate, to obtain the maximum recovery rate. The highest recovery rate, 433.3g/h was gained at 1.18 RPM and 22ml/min. It was identified that the recovery rate can be optimized by improving the heat utilization.