Bucket Elevator Design Study [PDF]

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PARAMETERS KNOWN Lifting Height Capacity (Q) Steel Shot Density (ρ)

TO FIND HOW THE BUCKETS ARE UNLOADING

VALUES 8.5 120 4.5

UNITS m Ton/hr Tonne/m3

TYPE OF UNLOADING

SPEED m/s

Gravity Unloading 1 Centrifugal Unloading * If speed of belt is less than 1 m/s, it fall under gravity unloading * If speed of belt is grater than 1 m/s, it fall under centrifugal unloading Check Table 2.1

TO FIND DIAMETER OF PULLEY BUCKET LENGTH (L) 229 BUCKET WIDTH (w) 178 BUCKET DEPTH (D) 152 BUCKET PROJECTION (H) 155 2.3 BUCKET WATER CAPACITY 0.0023 Steel Shot Density (ρ) 4500 LOAD WEIGHT IN BUCKET= Water Capacity x Density of material

TO MOVE 120 tonnes/hr PITCH/SPACING BETWEEN BUCKETS IF, 2xH IF, 3xH BELT SPEED (V) = NO.OF BUCKETS x PITCH PULLY DIAMETER (Dp) = 2 x RADIUS WHERE, R = (V^2/g)

mm mm mm mm lts m^3 kg/m^3

10.35

kg

11594.2028985507

buckets/hr

3.22

buckets/sec

2xH or 3xH 310 465 1498 1.5

mm mm mm/sec m/sec

0.457

m

457

mm

TO FIND ROTATIONAL SPEED OF PULLEY ROTATIONAL SPEED OF PULLEY (N)

62.58

TO FIND TOTAL LENGTH OF BELT LENGTH OF THE BELT (Lb) =

rpm

link

WE WILL GET THIS INFO FROM BUCKET MANUF ONCE BUCKET WATER CAPACITY IS DESIDED

LENGTH OF THE BELT (Lb) =

18445

mm

NO.OF BUCKETS = LENGTH OF THE BELT/PITCH

40

BUCKETS

BELT VELOCITY (V) =

294.80 1.50

ft/min m/sec

18.45

LINK

23.00876

PARAMETERS KNOWN Lifting Height Capacity (Q) Steel Shot Density (ρ) % Of filling

TO FIND HOW THE BUCKETS ARE UNLOADING

VALUES 8.5 120 4.5 0.67

UNITS m Ton/hr Tonne/m3

TYPE OF UNLOADING

SPEED m/s

1 Centrifugal Unloading * If speed of belt is less than 1 m/s, it fall under gravity unloading * If speed of belt is grater than 1 m/s, it fall under centrifugal unloading Check Table 2.1

TO FIND DIAMETER OF PULLEY BUCKET LENGTH (L) 170 BUCKET WIDTH (w) 130 BUCKET HEIGHT (H) 140 VOLUME OF BUCKET 3094000 % Of filling 0.67 Steel Shot Density (ρ) 4500 LOAD WEIGHT IN BUCKET= % Of filling x Bucket vol x Density of 9.32841 material

TO MOVE 120 tonnes/hr PITCH/SPACING BETWEEN BUCKETS IF, 2xH IF, 3xH BELT SPEED (V) = NO.OF BUCKETS x PITCH PULLY DIAMETER (Dp) = 2 x RADIUS WHERE, R = (V^2/g)

mm mm mm mm^3

buckets/hr

4

buckets/sec

2xH or 3xH 280 420 1501 1.5

mm mm mm/sec m/sec

0.459

m

459

mm

TO FIND TOTAL LENGTH OF BELT LENGTH OF THE BELT (Lb) =

0.0031

kg

12863.9285794685

62.45

LINK

kg/m^3

TO FIND ROTATIONAL SPEED OF PULLEY ROTATIONAL SPEED OF PULLEY (N)

link

rpm

0.459

LENGTH OF THE BELT (Lb) =

18596

mm

NO.OF BUCKETS = LENGTH OF THE BELT/PITCH

44

BUCKETS

BELT VELOCITY (V) =

295.43 1.50

ft/min m/sec

18.6

LINK

Welspun Sl No: 1

Parameters

Unit

Length Width Depth

1.2 Bucket Volume (0.5LWD)

2

2.1 2.2 2.3 2.4 2.5 2.6 2.7 3

%of bucket filling Considered Practical Filling/ bucket Density of Steel Shots (ρ) Steel Shots carried/ Bucket/pass

Unit

cm cm cm cc Lit Lit kg/lit Kg

29 12 16 2784 2.7 90% 2.43 4.5 10.935

cm cm cm cc Lit Lit kg/lit Kg

GEAR MOTOR & SPROCKET DRIVE CHAIN

Motor RPM Gear Box Ratio (i) Gear Box O/p Speed Sprocket Drive Sprocket Driven Sprocket Reduction Ratio Drive pulley RPM

rpm no-z no-z rpm

1465 19.6 74.745 16 19 1.188 62.943

rpm no-z no-z rpm

DRIVE PULLEY, BELT & BUCKETS

3.1 Diameter of Drive Pulley 3.2 Circumference 3.3 Linear Speed of belt (Circumfer.*rpm) 3.4 Bucket Pitch 3.5 No: of buckets scooped/min 3.6 Total Steel Shots handled by 371 buckets

4

Value

BUCKET

1.1 Bucket Dimension

1.3 1.4 1.5 6

ESF

Proposed Bucket Elevator Rating

cm cm cm/min m/min m nos/min kg/min kg/hr ton/hr ton/hr

53.8 cm cm 169.01 cm/min 10,638.18 106.38### m/min m 0.3 0 nos/min 354.61 kg/min 3,877.62 232,656.96 kg/hr 232.66 ton/hr 220

ton/hr

ESF

ESF

QMC (05.12.2016)

1704 (05.12.2016)

Value

Unit

Value

Unit

Value

Unit

22.9 17.8 15.2 3,097.91 3.10 90% 2.79 4.5 12.55

cm cm cm cc Lit

22.9 17.8 15.2 3,097.91 3.10 90% 2.79 4.5 12.55

cm cm cm cc Lit

25.4 12.7 12.7 2,048.38 2.05 90% 1.84 4.5 8.30

cm cm cm cc Lit

1465 19.6 74.745 16 19 1.188 62.943

Lit kg/lit Kg

rpm no-z no-z rpm

41 cm cm 128.80 cm/min 8,107.16 81.07### m/min m 0.465 0 nos/min 174.35 kg/min 2,187.46 131,247.56 kg/hr 131.25 ton/hr ton/hr

1465 19.6 74.745 16 19 1.188 62.943

45.7 143.57 #VALUE! 0.465 #VALUE! #VALUE! #VALUE! #VALUE!

Lit kg/lit Kg

rpm no-z no-z rpm

cm cm cm/min m/min m nos/min kg/min kg/hr ton/hr ton/hr

1465 19.6 74.745 16 19 1.188 55.000

51 160.22 8,811.91 88.12 0.25 352.48 2,924.13 175,447.57 175.45

Lit kg/lit Kg

rpm no-z no-z rpm

cm cm cm/min m/min m nos/min kg/min kg/hr ton/hr ton/hr

1704 (05.12.2016) Value

9 9 6.5 263.25 0.26 90% 0.24 4.5 1.07

0.29 0.12 0.16 0.005568 21.2976

2 buckets/s 1465 19.6 74.745 16 19 1.188 58

20 62.83 3,644.14 36.44 0.2 182.21 194.26 11,655.74 11.66 10

53.8

9 7 6

228.6 177.8 152.4