Wash Column Technology
The GEA Messo PT Wash Column Technology (Download techsheet)
GEA
Messo PT has patented two types of wash column technologies. Both types
use mechanical compresssion to move the crystal bed through the column and are
therefore classified as forced transport type columns. The illustration shows a
continuous "screw-type" column that uses a rotating screw for bed compression
and transport. Once the slurry feed enters the column most of the liquid is
removed through a filter. The crystals are then forced through the column where
they are washed to remove any remaining impurities.
See the following
pages for a process
description