Miscellaneous Columnbase Designs

A large number of column-base designs have appeared in the literature,10 and it is our understanding that there are various proprietary designs that have never been publicized. Many of these include baffle arrangements intended to make the column base and reboiler function as an efficient stage of separation. An occasionally encountered design for this purpose is illustrated in Figure 4.16. As can be seen, the thermosyphon reboiler suction is taken from behind the outiet weir for the last downcomer, which extends almost to the base. This means that reboiler feed is richer in low boilers than is the column-base contents.

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