By Broadfoot, R; White, ET; Fitzmaurice, AL; Steindl, RJ
The principle of scraped surface heat exchange has been investigated for the molasses cooling duty. Laboratory studies with a small scale rotary drum cooler are discussed. There determined correlations for the thickness of the molasses film which can be maintained on the rotating drum and for predicting the efficiency of heat removal. Following the favourable conclusions from this work, the principle was developed further with the conversion of a discarded rotary mud filter to a full scale scraped rotary drum molasses cooler at Mourilyan mill. This paper discusses the results of the laboratory experiments, provides details of the drum cooler installation at the factory and presents the results of the performance evaluation on the factory unit. Future application of the principle to molasses cooling is also discussed.