Separations under Control Barry Perlmutter explains developments in containment for eliminating worker exposure during solid-liquid separation operations

摘要

IN the 1970s,chemical operations that I have been exposed to used acetone and benzene for the main slurry solid-liquid separation process,as well as for cleaning.In the 1980s,there was a push to minimise solvent use,and research was looking more towards using water as the process liquid,but you still had open filter presses,and rotary drum filters where the entire plant was white from titanium dioxide or pharma stearates.Fast forward to the present and we all know that processes remain open with filter presses,vacuum filters and centrifuges.Our job these days is to find solid-liquid separation process solutions that can be contained for high solids slurries(greater than 10% solids)during filtration,cake washing and dewatering/drying.The discussion below looks at batch and continuous operations.