BBD double inlet and double outlet tube coal mill
January 7, 2019
Fan Mill
January 7, 2019

MT Tubular Coal Mill

Category:
Description

Tubular Coal Mill

The tubular coal mill is mainly used for pulverizing various hardness coal in thermal power plants, which is high adaptable, reliable operation and easy maintenance.

The tubular coal mill is driven by motor which rotate the tube through the rod-pin coupling, cylinder gear reducer and open big gear decelerating to drive. The grinding medium (steel ball) is filled in the tube of mill. When the tube is rotating the steel ball is lifted to a certain height by the centrifugal force and friction force, and then falls down by its own gravity. The coal inside tube is knocked and grinded by the falling steel ball. The coal pulverized is blown by the pneumatic equipment into the boiler for combustion or coal bunker for storage.

The static and dynamic lubrication is that the high-low pressure oil pump is also started simultaneously before the coal mill starts. In the critical situation the oil flow with high pressure enters the shaft through the hydrostatic pipeline, and float-lifts the coal mill rotation part to form the oil film on the shaft in order to improve the lubrication when the coal mill starts. When oil flow is continuously supplied by the low pressure after the coal mill starts the dynamic pressure lubrication is realized. The high pressure oil pump stop working after the mill normally rotates for 2-3 minutes, the shaft of coal mill is lubricated relay on the low pressure dynamic pressure lubricating.

The tubular coal mill is equipped with jacking device, screen unloading ball device and slow transmission device in which the screen unloading ball device is used for periodically screening and unloading steel ball, the slow transmission device is used when the tube liner is changed and overhauled. The full complete of auxiliary part supply can easily satisfy with the maintenance and overhaul for the coal mill. The auxiliary parts can be ordered separately as per the user’s requirements.

The coal mill is classified as medium storage type and direct-fired type. The direct-fired coal mill is the double inlet and double outlet tubular coal mill and the module of this kind is BBD.


Name plate instruction


The Parameter Table

Type

Diameter mm

Length mm

Rotation r/min

Ball Quantities (Max)

Feeding mouth Dimension
mm

Output
t/h

Weight t

Filling rate

MTZ 2126

2100

2600

22.81

10

0.236

Ф600 600

4

MTZ 2133

3300

13

0.242

Ф650 650

6

MTZ 2532

2500

3200

20.63

18

0.244

Ф750 750

8

MTZ 2539

3900

20.77

22

Ф800 800

10

MTZ—W 2935

2900

3500

19.34

26

0.239

Ф850 850

12

MTZ 2935

MTZ—W 2941

4100

30

0.236

14

MTZ—W 2947

4700

35

0.24

Ф950 950

16

MTZ 2947

MTZ—W 3247

3200

4700

18.42

44

0.248

Ф1050 1050

20

MTZ 3247

18.52

40

0.225

Ф1120 Ф1310
1120   1310

MTZ—W 3258

5800

18.42

55

0.213

Ф1120 1120

25

MTZ 3258

18.46

Ф1120 Ф1310
1120   1310

MTZ 3257

5700

18.54

50

0.194

MTZ 3560

3500

6000

17.57

59

0.217

Ф1300 Ф1450
1300   1450

30

MTZ 3570

7000

69

0.218

Ф1350 Ф1550
1350   1550

35

MTZ—W 3883

3800

8300

17

95

0.219

Ф1700 1700

50

MTZ 3865

6500

75

0.20

Ф1574 Ф1700
1574   1700

40

MTZ 3872

7200

85

0.205

45

MTZ 3879

7900

95

0.21

50

MTZ 3886

8690

105

0.213

55

 

The Parameter Table

Type

Main motor

Machine dimensions

Type

Rate KW

Rotation r/min

Voltage v

L (m)

W(m)

H(m)

MTZ 2126

JS128—8
JS136—8
JS137—10

155
145
155

735
709

380
3000
380

8.28

4.71
4.76

4.2

MTZ 2133

JS136—8
JS137—8

180
170

735

380
3000

9.06

4.77

MTZ 2532

JS147—8
JS1410—8

260
280

735
740

3000
6000

9.8
9.6

5.4

4.6

MTZ 2539

JS148—8
JS157—8

310
320

10.3
10.4

5.5

MTZ—W 2935

JS1410—8
JS158—8

370
380

8.6

6.8

5.1

MTZ 2935

10.9
10.7

6.2
6.3

5.3

MTZ—W 2941

JS1510—8

475

740

6000

11.5

6.3

4.8

MTZ—W 2947

JS158—8
JS1512—8

500
570

735
740

3000
6000

12.03
12.24

6.3

5.3

MTZ 2947

10.04

7

5.2

MTZ—W 3247

JS158—6
JS1510—6

680
650

985

13.8

6.8

5.2

MTZ 3247

Y450—6

630

1000

12.6

6.3

5.4

MTZ—W 3258

HS1510—6
JS1512—6

850
780

985
990

13.9

6.8

5.7

MTZ 3258

14.1

7.9

5.4

MTZ 3257

Y500—6

800

1000

13.3

6.5

5.4

MTZ 3560

Y630—1—6

1000

985

3000
6000

15.7

7.4

5.6

MTZ 3570

Y630—2—6

1120

16.7

MTZ—W 3883

Y1000—10/1430

1000×2

595

6000

19.8

9.77

5.5

MTZ 3865

Y800—1—10

1250

17.9

8.8

5.9

MTZ 3872

Y800—2—10

1400

18.6

MTZ 3879

Y800—3—10

1600

19.7

MTZ 3886

Y800—4—10

1800

20.4

 

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