Mixer design/protocol

Effects of Mixer Design, Mixing Protocol, Catalyst Concentration, and Timescales 27... 

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. 

Lack of flexibility. The continuous mixer is designed for a particular application and it cannot easily be tailored to mix a number of different ingredients unless the necessary facilities are built into the system at the ontset. The effective turndown for batch mixer is quite high, and it is easier to vary the production rate. Continuous mixers generally have feeders that are precisely controlled, and it is not easy to change these narrow limits around the feed rate. If a new ingredient is introduced, this calls for a change in the protocol, and the feeders have to be calibrated to suit the application in hand. 

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