Drying of biological materials in a spout-fluid bed with a draft tube

Abstract

The possibility of applying a spout-fluid bed with a draft tube and conical bottom was investigated for drying fluid media with a certain content of suspended material was investigated. The major goal who to study the drying of biological materials and products of food the industry. Experimental results concerning the fluidmechanical characteristics of a spout-fluid bed with a centrally situated draft tube and the drying characteristics were obtained on a pilot scale unit, 0.250 m in diameter, with a toed consisting of polyethylene particles 3.6 mm mean diameter and 940 kg/m3 density. Within the regime of the fluid mechanical stability, the system could be used for drying biological suspensions with satisfactory results.

Predmet ovog rada je ispitivanje mogućnosti primene fontansko-fluidizovanog sloja sa centralnom cevi u cilju sušenja suspenzija različitog sadržaja suspendovanih materija. Osnovni cilj je bio ispitivanje mogućnosti sušenja bioloških materijala i proizvoda prehrambene industrije. Eksperimentalni rezul-tati su dobijeni ispitivanjem fluidno-mehaničkih karakteristika i procesa sušenja u poluindustrijskoj jedinici prečnika 250 mm, sa centralnom cevi i slojem inertnih čestica polietilena, prečnika 3.6 mm i gustine 940 kg/m3. Uz poštovanje uslova fluidnomehaničke stabilnosti, ispitivani sistem se može sa uspehom koristiti za sušenje bioloških suspenzija.