ABSTRACT
The examples of flame spray drying (FSD) process application for dewatering of thermally resistant (ceramic material) and thermally sensitive (maltodextrin and coffee) materials are presented in this chapter. The results of extensive experimental measurements of dried powder properties including bulk and apparent densities, particle morphology, moisture and fuel content, color index, and hydroxymethylfurfural content are shown and discussed. The effects of FSD parameters such as solid and fuel content in the feed, feed rate, atomization pressure, air flow rate in the tower, and feed temperature on particle size distribution and product quality were determined. In FSD process, dried product properties such as particle arithmetic mean diameters (AMD), powder morphology, bulk and apparent density, and thermal degradation of dried product might be controlled by selection of atomization parameters and feed composition. Lower feed rate and atomization pressure, higher solid content, and lower content of ethanol in the feed result in a substantial growth of AMDs, decrease of particles bulk and apparent density, higher color index, and higher content of caramelized products.
