Sugar - Fluid Flow Velocities

5/20/2018 Sugar - Fluid Flow Velocities

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Guidelines for the acceptable ranges of flow velocity for various fluids found in a sugarfactory

Goodall

Velocity [m/s]

Water for space heating 2 4

Water for boiler feed 3 6

Saturated steam 30 50

Superheated steam 50 100

Hugot

Velocity [m/s]


Saturated steam 24 37

Exhaust (wet/oily) 31 46

Bled vapour 37 49

Vapour under vacuum 46 76

Suction

Water 1 1.25

Juice 1 1.2

Syrup 0.5 1

Molasses 0.25 0.5

Massecuites 0.1 0.2

DeliveryWater 1.25 2.5

Juice 1.2 2

Syrup 0.75 1.25

Molasses 0.5 0.75

Massecuites 0.15 0.3

SUGAR P

01 Apr 2014White

$/tonne

01 Apr 2014Raw

/lb

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Lyle

Velocity [m/s]

Water 1.22 2.44


Dry saturated steam 31 40

Wet exhaust steam 21 31Moderate vacuum water vapour 46 61

High vacuum water vapour 61 107

Babcock & Wilcox

Velocity [m/s]

High pressure steam 41 61

Low pressure steam 61 76

Water general 2.54 3.81

F r om a sou r c e on t h e i n t er n et

Maximal velocity in pipes

Water m/s ft/s

Tap water (low noise)0.5 -0.7

1.6 -8.2

Tap water1.0 -2.5

3.3 -8.2

Cooling water 1.5 -2.5 4.9 -8.2

Boiler feed water. suction0.5 -1.0

1.6 -3.3

Boiler feed water. discharge1.5 -2.5

4.9 -8.2

Condensate1.0 -2.0

3.3 -6.5

Heating circulation1.0 -3.0

3.3 -9.8

Steam m/s ft/s

Saturated Steam. high pressure 25 - 4082 -131

Saturated Steam. in special cases - 60 - 197

Saturated Steam. medium and low pressure 30-4099 -131

Saturated Steam. at peak load - 50 - 164

Sugar Bo

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Steam / Water emulsion - 25 - 82

Oil m/s ft/s

Suction lines for pumps - 0.5 -1.6

Suction lines for pump (low pressure)0.1 -0.2

0.3 -0.65

Discharge line for booster pump

1.0 -

2.0

3.3 -

6.5

Discharge line for burner pump - 1.0 - 3.3

Air m/s ft/s

Combustion air ducts 12 - 20 40 - 66

Air inlet to boiler room 1 - 33.3 -9.8

Warm air for house heating0.8 -1.0

2.6 -3.3

Vacuum cleaning pipe 8 - 15 26 - 49Compressed air pipe 20 - 30 66 - 98

Ventilation ducts (hospitals) 1.8 - 4 5.9 - 13

Ventilation ducts (office buildings)2.0 -4.5

6.5 - 15

Exhaust gas m/s ft/s

Ducts at minimum load - 4.0 - 13

Stack at minimum load - 5.0 - 16

Boiler with one-step burner (on - off) 5.0 -8.0

16 - 26

Boiler with two-step burner (high - low) 10 - 15 31 - 49

Boiler with modulating burner (3:1) 15 - 25 49 - 82

To keep the surface free from soot thevelocity should always exceed

3.0 -4.0

9.8 - 13

It is recommended that the maximum inlet velocitiesapplied to control valves should be as shown in the

tables below.

Gate Valve Size Liquid Steam or Gas

mm m/s ft/s m/s ft/s

15 - 25 9 30 120 400

40 - 50 7.5 25 90 300

65 - 100 6 20 75 250

150 - 200 6 20 70 225

250 - 400 4.5 15 55 175


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Angle Valves Size Liquid Steam or Gas

mm m/s ft/s m/s ft/s

15 - 25 13.5 45 135 450

40 - 50 12 40 105 350

65 - 100 10.5 35 90 300

150 - 200 9 30 85 275

250 - 400 7.5 25 70 225

Refer en ces

Goodall, Efficient Use of Steam, pg 192 Table 9.5

Hugot, Handbook of Cane Sugar Engineering, pg 1058 Table 47.6 and pg 1123 Table45.2

Lyle, Efficient Use of Steam, pg 132 Table XXVII

Babcock & Wilcox, Steam: Its Generation and Usage

http://www.steamesteem.com/index.html?tables


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Sugar - Fluid Flow Velocities

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