Working principle:
¡öAfter be fed into the drier from one end, wet materials will be handled evenly by flights in the inner cylinder. Materials are all evenly distributed in the drier and contact with the parallel-flow (counter flow) hot air fully to speed up the drying heat transfer and the mass transfer driving force. During the drying, materials is effected by the slanting flights and the hot-air and final-products will be discharged by the star discharge valve at the other end of drier.
Features:
1. Rotary drum drier has the high degree of mechanization and heavy production capacity.
2. Little resistance when the fluid passes through the drum; low energy consumption.
3. Good suitability of material properties.
4. Stable operation; low cost; good drying uniformity.
Application:
1. It is suitable for drying large granules, large specific gravity materials in the industries such as chemical industry, mines, metallurgy, etc.
2. It can be used to dry the powder, granular materials which has the special requirements. Such as: HP foaming agents, less slag, light calcium carbonate, floridin, magnetic powder, graphite, herb residue. It requires low-temperature dry and continous drying materials in quantities.
Technical Parameters£º
|
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 |
Slag of blast |
Ammonium sulphate |
Phosphorus fertilizer |
Coal |
|
Amount to be treated (kg/h) |
1000 |
466 |
furnace |
20000 |
12000 |
5000 |
|
Primary moisture (%) |
30 |
13 |
15000 |
1.5 |
5 |
6.5 |
|
Final moisture (%) |
15 |
0.3 |
6 |
0.1 |
0.1 |
0.1 |
|
Average diameter (mm) |
6.5 |
0.05 |
1 |
0.5-1.7 |
0.5 |
5 |
|
Bulk density of raw material(kg/m3) |
770 |
800 |
4.7 |
1100 |
1500 |
750 |
|
Amount of hot air (kg/h) |
39000 |
5400 |
1890 |
9800 |
6500 |
16000 |
|
Temperature of air at inlet (¡æ) |
600 |
165 |
10750 |
180 |
650 |
570 |
|
Temperature of raw meterial at outlet (¡æ) |
|
42 |
500 |
70 |
80 |
75 |
|
Way of hearing |
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 cylinder8
Lnner of outer cylinder16 |
6 12 |
|
Diameter of drier (m) |
2.0 |
1.5 |
2 |
2.3 |
Outer cylinder2
Inner cylinder 0.84 |
Outer cylinder2.4
Inner cylinder 0.95 |
|
Length of drier (m) |
20 |
12 |
17 |
15 |
10 |
16 |
|
Driving power (kw) |
22 |
7.5 |
15 |
11 |
11 |
15 | |
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