HZG Rotary Drum Dryer

WORKING PRINCIPLE

Rotary Drum Drier is a kind of dryer with rotating cylinder body which is a little bit incline. The wet material is loaded from one end from the screw material adding device continuously, and is stirred by the bafflers that are uniformly distributed in the barrel.

The material is uniformly distributed and dispersed in the dryer and fully contacts the hot air of counter flow. When the material passing through the cylinder inside surface, it will contact with the hot air circling inside and being dried .Most of the dried product will be discharged from the other end of the dryer. Small part of the fine granule goes into the cyclone separator with the exhaust air. The powder will be separated and collected, and the exhausted air will be ejected to the atmosphere. During the drying course, the material will slowly move to the lower end from the higher part recur to the slowness rotating of the cylinder.

FEATURES

(1) Large throughput capacity and continuous operation
(2) Simple configuration and easy to operate
(3) Good adaptability of materials
(4) Low energy consumption
(5) Low maintenance cost

APPLICATION

This dryer widely used in the following industries:
-Drying large particles and heavy material for chemical, mining, metallurgy and other industries, such as mining, blast furnace slag, coal, metal powder, fertilizer, ammonium sulfate.
-Drying powder or granular materials which have special requirements, such as HP vesicant, lees residue, precipitated calcium carbonate, activated clay, magnetic powder, graphite, dregs.
-Drying the material which required low-temperature and continuous drying process.

Technical Parameter

Model	direct heating clockwise way	direct heating clockwise way	direct heating counterclockwise way	direct heating counterclockwise way	compound heating	compound heating
kinds of raw material	Ore	HP Vesicant	Blast furnace slag	Ammonium sulfate	Phosphate	Coal
Amount to treated (kg/h)	1000	466	15000	20000	12000	5000
Primary moisture (%)	30	13	6	1.5	5	6.5
Final moisture (%)	15	0.3	1	0.1	0.1	0.1
Average diameter (mm)	6.5	0.05	4.7	0.5-1.7	0.5	5
Bulk density of raw material (kg/m3)	770	800	1890	1100	1500	750
Amount of hot air (kg/h)	3900	5400	10750	9800	6500	16000
Temperature of air at inlet (oC)	600	165	500	180	650	570
Temperature of raw material at outlet(oC)		42	100	70	80	75
Way of heating	Gas	Steam,electric heating	Heavy oil	Coal fuel hot air furnace	Heavy oil	Heavy oil
Filling coefficient		6.3	7	7.5	7.8	18
Revolution (rpm)	4	4	3.5	3	4	2
gradient	0.04	0.005	0.03	0.05	0.05	0.043
Quantity of stirring-up rake	12	24	12	22	Outer of inner cylinder 8 Inner of Outer cylinder 16	6 12
Diameter of drier (m)	2.0	1.5	2	2.3	Outer cylinder 2 Inner cylinder 0.84	Outer cylinder 2.4 Inner cylinder0.95
Lenght of drier (m)	20	12	17	15	10	16
Driving power (kw)	22	7.5	15	11	11	15