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Lignite Dryer

Lignite Dryer

Power:6-45kw

Application Range:Coal plant

Production Capacity:2.5-50TPH

Processible Materials: coal dust, coking coal, powder carbon, active carbon, dust coke, powder materials, waste residue

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Overview

Lignite is a kind of mineral coal with minimum coalification degree. Because it is rich in volatile elements, it is easy to be burnt and generate smoke. 

It is mainly used as power plant fuel, chemical raw material, catalyst supports, adsorbents, sewage purification and recovery of metal, etc. The dried lignite can be made as coal bricks used for cooking and heating, which can also be used as a source of activated carbon used for water treatment, recovery of gold and iodine extraction.

dryer

Before Drying
After Drying

Lignite dryer is also called brown coal dryer and wood coal dryer, which can realize continuous, industrial and automatic operation. It can be used for drying fly ash, coke, coal as well as other granular, paste and powder materials. Lignite dryer can guarantee that the quality of coal slime and lignite is unchanged after the drying process, which can dewater the coal slime to the moisture content below 13%, so as to improve the combustion efficiency. Therefore, lignite dryer can make full use of the coal resources and reduce the emission concentration, so as to achieve energy-saving emission reduction and environmental protection objectives.

Lignite Dryer Materials

The Working Principle of Lignite Drying Machine:

Brown coal, fly ash, coke and other materials enter into the drying drum, with the turning of copy board, it is uniformly scattered to fully contact with the hot air, so as to achieve the purpose of heat and mass transfer.

dryer machine parts

Four Drying Levels of Lignite Coal Dryer:

First Level: 400 ℃, ensure the chemical composition of lignite, remove most of the moisture;
Second Level: 300 ℃, ensure that the lignite is not coking, strong wind and high yield in water removal;
Third Level: 120 ℃ -210 ℃, fair flow drying in the cylinder;
Fourth Level: 60 ℃ -80 ℃, the removal of water depends on low temperature heat.

The Drying Process of Lignite Dryer:

 The Drying Process of Lignite Dryer

Parameter

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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