Naslov
Effect of impeller type and position in a batch cooling crystallizer on the growth of borax decahydrate crystals

Autori
Kaćunić, Antonija ; Akrap, Marija ; Kuzmanić, Nenad

Izvornik
Chemical engineering research & design (0263-8762) 91 (2013), 2; 274-285

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Mixing ; Batch cooling crystallizer ; Impeller off-bottom clearance ; Crystal growth ; CSD ; Borates

Sažetak
The effects of impeller type and position in a batch cooling crystallizer on the crystal growth kinetic as well as the shape, agglomeration and crystal size distribution of disodium tetraborate decahydrate (borax) were investigated in detail. Three types of impellers applied in this work generated completely different fluid flow patterns in the crystallizer allowing investigation of the influence of the liquid flow on the kinetic parameters as well. The ratio of impeller off- bottom clearance, C, to the liquid height, H, was varied from 0.1 to 0.5 for all impeller types used. Results indicate that the impeller type and off-bottom clearance influence the overall crystal growth rate and the crystal size distribution of the final product. It was also found that agglomeration of crystals produced was less pronounced as the radial fluid flow in the crystallizer became more dominant. In that system borax crystals tend to be smaller, but more regularly shaped.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA