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Rotary Dryer

Rotary Dryer

The rotary dryer is widely used for bentonite, titanium concentrate, coal, manganese ore, pyrite, limestone, peat drying. Both Electric engine and Diesel engine are optional. Capacity : from 1.9 t/h to 76 t/h flexible.

Advantages

Through improvement, the rotary dryer can greatly improve machine-hour output and reduce energy consumption. However, the improved effect in some manufacturing companies is not ideal, and such problems may happen as the abrasion of the internal lining boards of the cylinder is fast, the discharging cylinder and the head of the dryer machine are easy to be burnt down and the bag-type dust catcher has short service life, which causes high maintenance cost and influences the normal production.

 The problems are not caused by technical improvement, but caused by that some manufacturers mainly focus on the part improvement of the drying equipment and do not take into consideration of the comprehensive balance issue of the whole drying system.

Rotary Dryer

Application Range

On the basis of traditional monocular rotary drum dryers, the structure of Fote rotary dryer has great breakthrough and innovation. Seen from the drying principle, the exchange of the materials and the hot air is more sufficient, scientific and reasonable, and all the thermal technical indexes take advanced level. Fote rotary dryers are suitable for drying all kinds of raw materials such as clay, gypsum, coal, slag, gangue, mixture, dry-mixed mortar, yellow ground and iron powder as well as for drying all kinds of raw materials in the production of phosphatic fertilizer, compound fertilizer and bulk materials in such industries as metallurgy and chemistry.

Main Features

(1) Rotary drying machines have high heat efficiency and obvious energy-saving effect. The test shows that the heat efficiency of Fote rotary dryers is much higher than the level of 50% of traditional monocular dryer machine. After this drying equipment is put into production and use, its coal saving effect is evident.


(2) The drying mechanism of rotary dryer is scientific, reasonable, highly efficient and energy saving. Materials carry out heat exchange with hot airflow inside the internal cylinder with the means of radiation, convection and conduction and inside the outside cylinder with the means of conduction and convection.

(3) The length of the machine is shortened, which is conducive to technical arrangement. The length of the whole machine is shortened by about 40% than that of monocular dryer machine, thus reducing the construction area of the plant, saving project investment and facilitating the technical arrangement for the reform of used plants.

(4) This drying machine adopts downstream drying technology, making the application range wider. Fote rotary dryers are suitable for drying all kinds of raw materials such as clay, gypsum, coal, slag, gangue, mixture, dry-mixed mortar, yellow ground and iron powder as well as for drying all kinds of bulk materials in such industries as metallurgy and chemistry.

(5) This machine has compact structure. Rotary dryer adopts horizontal installation and riding wheel for support, and it replaces rack wheel gear and pinion driving with riding wheel driving, making the installation more convenient, operation simpler, running condition more reliable and running ratio higher.

(6) The automatic temperature surveillance system makes the operation of the machine more convenient.

(7) Various designs of lifting boards and the perfect combination of dihedral lifting board and character lifting board makes the exchange of materials with the hot smoke more sufficient and reduces the production ratio of wind tunnel inside the dryer machine.

(8) Rotary dryer adopts frequency control of motor speed to adjust the rotating speed of the cylinder of the drying equipment. According to the water content of the materials and output requirement, the machine can adopt proper rotating speed to ensure the need of the next procedure.

(9) The external superficial area of this machine is reduced by over 30% than that of monocular rotary dryer, and the external cylinder has the function of heat insulation. The surface temperature of the external cylinder is low and the heat loss is low, so that it can greatly improve the labor environment and labor condition while ensuring high efficiency and energy conservancy.

Model Specifications

Spec./m
(Dia.×Length)
Shell Cubage
(m³)
Capacity
(t/h)
Installation
Obliquity
(%)
Highest Inlet
Air Temperature
(℃)
Main Motor
(kw)
Weight
(t)
Φ1.2×8.0
9.0
1.9~2.4
3~5
700~800
7.5
9
Φ1.2×10
11.3
2.4~3.0
3~5
700~800
7.5
11
Φ1.5×12
21.2
4.5~5.7
3~5
700~800
15
18.5
Φ1.5×14
24.7
5.3~6.6
3~5
700~800
15
19.7
Φ1.5×15
26.5
5.7~7.1
3~5
700~800
15
20.5
Φ1.8×12
30.5
6.5~8.1
3~5
700~800
18.5
21.5
Φ1.8×14
35.6
7.6~9.5
3~5
700~800
18.5
23
Φ2.2×12
45.6
9.7~12.2
3~5
700~800
22
33.5
Φ2.2×14
53.2
11.4~14.2
3~5
700~800
22
36
Φ2.2×16
60.8
13.0~16.2
3~5
700~800
22
38
Φ2.4×14
63.3
13.5~16.9
3~5
 
700~800
37
45
Φ2.4×18
81.4
17.4~21.7
3~5
700~800
37
49
Φ2.4×20
90.4
19.3~24.1
3~5
700~800
45
54
Φ2.4×22
99.5
21.2~26.5
3~5
700~800
45
58
Φ2.6×24
127.4
27.2~34.0
3~5
700~800
55
73
Φ3.0×20
141.3
30.1~37.7
3~5
700~800
75
85
Φ3.0×25
176.6
37.7~47.1
3~5
700~800
75
95
Φ3.2×25
201
42.9~53.6
3~5
700~800
90
110
Φ3.6×28
285
60.8~76.0
3~5
700~800
160
135

Technical parameters of indirect heat dryer:

  Shell 
diameter
×shell 
Length  
Items
Inside 
diameter 
of outer 
shell
(mm)
Inside 
diameter 
of inner 
shell
(mm)
Shell
 Length
(m)
Shell
 cubage
(m³)
Shell 
obliquity
Lifting 
blade
 form
Highest 
inlet air
 temperature
(℃)
Dimensions
(m)
Φ1.5×15m 1500 500 15 20.27 3-5% Lifting form 850 16.2×2.7×2.7
Φ1.5×17m 17 22.97 18.2×2.7×2.7
Φ1.5×19m 19 25.68 20.0×2.9×2.9
Φ1.8×21m 1800 650 21 35.91 3-5% Lifting form 850 22.5×2.7×2.7
Φ1.8×23m 23 39.33 24.5×2.9×2.9
Φ1.8×25m 25 42.75 26.5×2.9×2.9
Φ2.2×21m 2200 800 21 58.10 3-5% Lifting form 850 ----
Φ2.2×23m 23 63.61
Φ2.2×25m 25 69.15

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