Process Engineering and Design Using Visual Basic®, Second Edition, 2nd Edition

321Chapter six: Separators

– The space between HLL (1900 mm) and the vessel top

(2591 mm) will be reduced and installation of the demister

pad will be difcult.

– The slug holdup volume will be reduced.

• The residence time check indicates that the available residence time

is much more than required. This does not necessarily mean that the

separator is overdesigned; it just shows that smaller droplets can be

separated.

• In the residence time and volume frame, the volume between NLL

and HLL for water is 8.33 m

3

and the condensate is 8.18 m

3

. These are

adequate for a slug volume of 7 m

3

.

• The residence time from the bottom to NLL is 1