Info

where: dr

is

the

diameter of the rings.

m

is

the

average slope of equilibrium curve

G''

is

the

vapour flowrate, and

L''

is

the

liquor flowrate.

In practice, the HETP concept is used to convert empirically the number of theoretical stages to packing height. As most data in the literature have been derived from small-scale operations, these do not provide a good guide to the values which will be obtained on full-scale plant. The values given in Table 11.5 may, however, be used as a guide.

Table 11.5. Values of HETP(14) for full-scale plant

Type of packing, application

25 mm diam. packing 38 mm diam. packing 50 mm diam. packing Absorption duty small diameter columns

Was this article helpful?

0 0

Post a comment