Powder Technology, Vol.295, 43-46, 2016
Development of a two stage batch fluid bed drying process to minimise impact of entrainment on product quality and drying endpoint determination
Control over batch fluid bed drying processes is important to assure product of uniform moisture content as the level of residual moisture can impact further processing and final product performance and stability. Entrainment during batch fluidised bed drying can potentially result in non-uniformity of the product moisture content and impact reliability of the process endpoint. A two stage inlet air flow batch drying process was defined to minimise the impact of entrainment on product uniformity. The two stage batch fluid bed drying process reduced the level of entrainment observed. This enables the implementation of a relatively straightforward differential temperature technique based on a temperature sensor only to reliably indicate drying endpoint. (C) 2016 Elsevier B.V. All rights reserved.