MT Tubular Coal Mill
January 7, 2019
Steel Ball Coal Mill
January 7, 2019

Fan Mill

Category:
Description

Fan Coal Mill

Fan mill is the main equipment of direct-fired pulverizing system for lignite-fired boiler in thermal power plant, and it also meets the pulverizing requirements of power boiler in chemical industry and papermaking factory. The fan mill is a kind of high efficiency pulverizing equipment which can simultaneously satisfy with grinding, drying and delivering. The fan mill has been widely used in direct-fired pulverizing system of lignite-fired boilers with its feature of the simple system, low power consumption and metal consumption, easy operation and low noise.

Our company can provide N and S series of 50 specifications products. For the N series it is properly used for grinding lignite and the lignite with moisture of 40-70%, whose maximum output is 200t/h. And for the S series it is properly used for grinding bituminous coal and hard lignite with moisture of less than 40%, whose maximum output is 90t/h.

How the fan mill works? The raw coal is fed into the gas pipeline and is heated by hot gas then is delivered into the mill. When coal and gas enter the mill the coal is distributed along the inner diameter of the impact wheel, and crushed under the attack and friction of the rotating impact wheel, in which the moisture in the coal also is mostly eliminated and dried. The gas and coal pulverized are moving in the volute then they enter the coal pipeline or the separator at the outlet of the mill.

The impact wheel plays a role of grinding and ventilation. The ventilation volume of the fan mill system includes the gas extracted from the boiler combustion chamber, hot air from air preheater, steam evaporated from raw coal and air leakage. The hot air blown into the side mantles from the bear is used as a seal to prevent leaking dust from the gap of the main shaft and body shell.

The fan mill has sturdy impact wheels and reliable double-row bears which can withstand the instantaneous overload therefore it can handle impurity coal, and that cantilever structure designed for wheel is easy to disassemble and be replaced in a short time.

S Series Parameter Table

Type

Output
BM0
(t/h)

Wheel DN
D2/D1
(mm)

Wheel Height
(mm)

Rotation
n
(r/min)

Ventilation
Q0
(m3/h)

Motor Rate
(KW)

S9.100(FM159.380)

9

1590/1010

290

1000

17000

225

S12.75(FM219.380)

12

2190/1490

380

750

22000

300

S14.75(FM220.400)

14

2200/1500

400

750

25000

340

S16.75(FM220.440)

16

2200/1500

440

750

28000

380

S18.75(FM220.460)

18

2200/1500

460

750

32000

400

S20.60(FM275.480)

20

2750/2030

480

600

38000

450

S25.60(FM275.590)

25

2750/1850

590

600

46000

560

S32.60(FM275.755)

32

2750/1850

755

600

59000

700

S36.50(FM318.644)

36

3180/2270

644

500

66000

800

S40.50(FM340.760)

40

3400/2420

760

500

76000

880

S45.50(FM340.880)

45

3400/2420

880

500

88000

1000

S50.50(FM340.970)

50

3400/2420

970

500

97000

1100

S55.50(FM380.940)

55

3800/2688

940

450

106000

1200

S57.50(FM340.1060)

57

3400/2470

1060

500

106000

1250

S60.45(FM380.1030)

60

3800/2644

1030

450

116000

1300

S65.45(FM380.1150)

65

3800/2644

1150

450

130000

1425

S70.45(FM380.1200)

70

3800/2644

1200

450

135000

1550

S80.42(FM400.1310)

80

4000/2644

1310

425

154210

1750

Note: The rated output is based on the below condition i.e. coal moisture is 120%, Hardy grinding coefficient is 60, coal particle R90 is 25%

N Series Parameter Table

Type

N10.150

N15.150

N19.150

N26.150

N28.100

N35.100

N40.100

N50.100

N60.100

Rated Output t/h

3.5

5.5

7.5

11

13

16

20

25

30

Motor Rate kW

45

65

75

120

140

180

200

250

280

Rotation r/min

1500

1000

 

Type

N70.75

N80.75

N90.60

N110.60

N120.60

N130.50

N150.50

N170.50

N200.45

Rated Output t/h

35

40

45

55

60

65

75

62

100

Motor Rate kW

320

380

400

420

460

500

570

650

765

Rotation r/min

750

600

500

450

 

Type

N240.45

N270.45

N300.45

N340.42

N380.42

N400.42

Rate Output t/h

120

135

150

170

190

200

Motor Rate kW

920

1035

1200

1360

1520

1600

Rotation r/min

450

425

Note: The rated output is based on the below condition i.e. coal moisture is 60%, Hardy grinding coefficient is 60, coal particle R90 is 50%

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