Mixer design concerns

Another mixer design concern is the presence of dead spots where quantities of the formula are stationary and not subject to mixing. Where such dead spots exist, there should be adequate procedures for recirculation or nonuse of the cream or ointment removed from the dead spots in the tank. 

Natural frequency is a dynamic characteristic of a mechanical system. Of primary concern to mixer design is the first lateral natural frequency, which is the lowest frequency at which a shaft will vibrate as a function of length and mass. The first lateral natural frequency is analogous to the vibration of a tuning fork, except on a larger scale. 

Consequently, we consider that the industrial scale technological management of microwave assisted chemical reaction is no compatible with batch reactors coupled with multimode applicators. Some typical processes with a systematic decrease of the dielectric losses of the concerned reactant, such as filtration and drying of mineral or pharmaceutical powders are compatible with multimode applicators. To our knowledge, the only industrial batch microwave device is the microwave variant of the Turbosphere ( all in one solution mixer/granulator/dryer designed by Moritz... 

Investigations conducted in 1975-1985 with a view to designing basic production facilities for granulation of thermosetting plastics concern primarily with improvements relating to plate granulators, screw mixers and rolls. 

The double-pipe mixer was designed and so far only used for contacting and reacting immiscible fluids [134], The respective flow-pattern maps were derived and annular and slug flows as well as complete spread of the inner-tube fluid were identified as distinct regimes. Since in this chapter only miscible liquids are concerned, no protocol and no results are given for the mixer below. H owever, the device is mentioned, since it could in principle be used also for mixing miscible fluids. 

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