DRUM DRYER BOŠKA

DRUM DRYER BOŠKA


The revolv­ing drum dryer has been designed for drying of loose or lump mate­ri­als, such as sand, ceramic frits or crushed cullet, with mixture of flue gases with air. The drying process is con­tin­u­ous. The wet mate­r­ial is fed in the drum dryer via a chute in the dryer inlet section. A uniform dis­tri­b­u­tion of the mate­r­ial in the dryer is guar­an­teed by the inside paddles, arranged con­ve­niently in a zig-zag pattern.


The pushing auger paddles move the mate­ri­als inside the drum from the feeding to the dis­charge section. The flow rate of the mate­r­ial can be con­trolled by varying the slope and rev­o­lu­tions of the drum. Dry mate­r­ial leaves the revolv­ing drum through the outlet chute. The flue gases are mixed with air in a com­bus­tion chamber of the auto­matic gas burner, pro­vid­ing thus suf­fi­cient quan­tity of the heat carrier. The required tem­per­a­ture of the heat carrier can be con­trolled by adjust­ing both the amount of air passing through and output of the burner. The used heat carrier mixed with dust frac­tions of the dried mate­r­ial is exhausted in the air-exhaust system mounted to the upper opening of the dryer. The drum rotates on two pairs of sup­port­ing rollers. The driving rollers are arranged in a common axis on that side of the drum that is more loaded, and each of them is driven with a worm gear unit and the elec­tric motor. The drum rev­o­lu­tions can be set con­tin­u­ously with a fre­quency con­verter that con­trols the rev­o­lu­tions of the motors in the gear units. The drum and all the dryer sec­tions coming in contact with the dried mate­r­ial are made of alloyed stain­less steel.

TECHNICAL DATA
TYPE
1
3
15
 
Length of the machine
5500
8000
15000
mm
Width of the machine
1200
1400
2100
mm
Height of the machine
1800
2300
2900
mm
Weight of the machine
1400
2500
7300
kg
Drying power
1
3
15
t/h
Input humid­ity
max.10
max.10
max.10
%
Output humid­ity
0,2 — 0,5
0,2 — 0,5
0,2 — 0,5
%
Max. power of the burner
180
400
2200
kW
Driving power
1,5
2 x 0,2
2 x 5,5
W
Drum rev­o­lu­tions
10
8
5
rpm
Exhaust power
0,6
1,5
6
m3/s