1. shell
2. packing (one or more sections)
3. packing support(s)
4. liquid distributor(s)
5. intermediate supports and redistributors
6. gas and liquid entrance and exit nozzles.
Many of the mechanical aspects of tower construction
and assembly have an influence on the design and interpretation
of tower performance. Every effort should
be made to increase the effectiveness of contact between
the process streams, and to reduce losses by
entrainment or wall effects whilst minimizing pressure
drop. At the same time the design must be consistent
with the economics dictated by the process and type of
construction.