Page 181 - Design of Simple and Robust Process Plants

166 Chapter 5 Process Simplification and Intensification Techniques

CW CW
VENT
OUT IN
VENT
C W
OUT
CW
LIQUID COLLECTING IN
TRAY

Fig. 5.21. Overhead system with reflux condenser, drum and
pumps versus an integrated design.

VENT
CW CW
CW CW VENT
OUT IN OUT IN
CW
IN
CW
OUT

Separate vent Condenser Integrated vent Condenser

Fig. 5.22. Integration of vent condenser and reflux drum within
the overall condenser.

Other applications include the following:

. Demister in knock-out drums and liquid phase separation in the same vessel
(three-phase separator).
. Coalescer and settler in one vessel.
. De-aerator stripper on top of a boiler feed water drum.
. Combinations of heat exchanger in one support, as for air coolers, where
more coolers are installed in a bank.
. Multiple heat exchangers in one compact system.
. Settler included in the extraction tower.
. Mixer settler in one vessel (see Figure 5.15).
. Flare drum incorporated in the stack (Figure 5.23).