Factor shorter drying time

However, in the case of the moving rims, kinetic factors must be considered such as time-dependent critical number of nodes and competition between the dewetting velocity and the growth rate of the fluctuation. The critical node number increases with the initial diameter of the dry patch (Figure 10). Consequently, the wave number of the fluctuation that grows most rapidly will increase with time. When a deformation mode can develop to be observable, the time required for the growth of the fluctuation mode has to be much shorter than the time scale of expansion of the diy patch. 

Product accumulation on the walls of the equipment is one of the most common occurrences when developing or during scale-up of a spray drying process. Product may accumulate on the walls of the drying chamber, cyclones, conveying ducts, or at the nozzle tip. Wall deposits are more commonly observed in the small scales since radial distances from the atomizer and residence time are shorter. Product buildup can be caused by several factors ... 

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