Drying

Buss-SMS-Canzler offer optimised solutions to drying problems based on the longstanding experience of the former Luwa Process Technology with Thin Film and Segmented Disc Dryers and the drying Know-How of Buss AG with Paddle Dryers and Pneumatic Convection Dryers.

The adjacent table (Fig. 1) provides an overview of the operating range of Buss-SMS-Canzler dryers.

: Fig. 1: Operating window Buss-SMS-Canzler drying

The following tables indicate the operating principle (Fig. 2) and some selection criteria for our dryers based on product properties and drying behaviour. (Fig. 3 - 7).

Operating principle of Buss-SMS-Canzler Dryers
Type of Dryer	Principle	Mode
		Batch	Conti
Vertical Thin Film Dryer	thin film		+
Horizontal Thin Film Dryer	thin film		+
Rovactor^®	"in-mass"dryers	+	+
Reactotherm^®	"in-mass"dryers	+	+

Suitability

good = +

rare = 0

not = -

Selection based on desired form of dry product
Type of Dryer	powder	fine- crystals	coarse- crystals	granular	paste	liquid or slurry
Vertical Thin Film Dryer	+	+	0	-	+	+
Horizontal Thin Film Dryer	+	+	0	0	+	+
Rovactor^®	+	+	+	0	-	-
Reactotherm^®	+	+	0	0	+	+

Selection acc. to type of moisture in feed
Type of Dryer	Water	Solvent, low boiling point	Solvent, high boiling point
Vertical Thin Film Dryer	+	+	+
Horizontal Thin Film Dryer	+	+	+
Rovactor^®	+	+	+
Reactotherm^®	+	+	+

Selection based on form of feed
Type of Dryer	solution, suspen- sion	slurry	thin paste, pumpable	compact paste	filter cake	crumbly to free flowing	granular (mm-range)	very coarse (cm-range)	fibrous
Vertical Thin Film Dryer	+	+	0	-	-	-	-	-	-
Horizontal Thin Film Dryer	-	0	+	+	+	+	0	-	0
Rovactor^®	-	-	-	0	+	+	+	0	0
Reactotherm^®	+	+	+	+	+	+	0	-	0

Selection based on product properties
Type of Dryer	temperature sensitive	softening at low temperature	low melting- point	combustible	dust explosion risk	toxic	abrasive
Vertical Thin Film Dryer	+	-	-	+	+	+	0
Horizontal Thin Film Dryer	+	-	-	+	+	+	0
Rovactor^®	0	-	-	+	+	+	+
Reactotherm^®	0	-	-	+	+	+	0