equipment sizing_raw sugar manufacture

7/29/2019 Equipment Sizing_raw sugar manufacture

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EQUIPMENT SIZING

MILLS

A = crushing rate of mills, TCH

c = factor dependent on the cane preparation equipment

n = mill speed, rev/min

N = number of rollers in the tandem

L = length of the rollers, m

D = mean diameter of the rollers, m

f = fiber%cane

Solving for the crushing rate of mills

Solving for number of rollers

Values for fiber%cane, mill speed, diameter of rollers, and factor for preparatory

plant

(assumption) (from Hugot, 1986) (assumption)


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Solving for the volume of limed juice

(from BUSCO)

Solving for the volume required of the clarifier tank

( )

Solving for the area of the clarifier

Solving for the diameter of the clarifier

Solving for the height of the clarifier


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ROTARY VACUUM FILTER

Solving for the filtering area (from Hugot, 1986)

Solving for the length

(assumption)

EVAPORATOR

Assuming the following:

Effect Brix of Entering Juice Brix of Exiting Juice

1st

14 27

2n 27 45

3r

45 X

4t X 65

Total Amount of Water Evaporated:

CJ = 364.7575 tons


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Amount of Water Evaporated at 1

steffect:

Amount of Juice Entering the 2

ndeffect:

Amount of Water Evaporated at 2nd effect:

Amount of Juice Entering the 3rd

effect:

From Hugot (1986), Table 3.4


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Vapor per unit steam Evaporation Coefficient

Steam Supplied 1 --

1st

effect 0.923 37

2n effect 0.972 35

3r effect 1.047 30 (ave)

4t

effect 1.162 30 (ave)

Let

Calculating P1 and P2,

Solving for x,


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Thus,

Calculating for the Heating Surfaces,

Calculating for Evaporator Dimensions,

From Hugot (1986),


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With this, we can get the Optimal Dimensions in each effect.

ParameterOptimal Dimensions

1st vessel 2nd vessel 3rd vessel 4th vesselTube Length (m) 4 3.5 3 2.5

Tube Diameter (mm) 35 38 44.43 50

Tube cross area (m2) 0.000962 0.001134 0.00155 0.001963

Surface Area (m2) 0.4398 0.4178 0.4187 0.3927

Number of tubes 415.0791 135.0147 117.8809 125.6987

Vessel Length (m) 12 10.5 9 7.5

pitch (m) 0.04725 0.0513 0.05998 0.0675

total tube cross area (m2) 0.3994 0.1531 0.1828 0.2468

collective diameter (m) 0.7131 0.4415 0.4824 0.5606

diameter of center well 0.2139 0.1325 0.1447 0.1682

diameter of vessel (m) 0.8557 0.5299 0.5789 0.6727

**Where:


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Assume that Center Well Diameter is 30 % that of the Collective Tube Diameter

According to Hugot (1986), the Center Well Diameter is equal to

of the VesselDiameter

VACUUM PANS

Vacuum pans (Batch Pan A)

Solving for mass of vacuum pan A inlet

Solving for volume of vacuum pan A inlet

(from BUSCO)

Solving for volume required of vacuum pan A


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( )

Solving for heating surface area

(for tube length 1000mm)

Solving for level of syrup in the pan (from Hugot)

Solving for the diameter of vacuum pan A

Solving for the height


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Vacuum pans (Batch Pan B)

Solving for mass of vacuum pan B inlet

Solving for volume of vacuum pan B inlet

(from BUSCO)

Solving for volume required of vacuum pan B

( )



Solving for level of syrup in the pan (from Hugot, 1986)


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Solving for the diameter of vacuum pan B


Vacuum pans (Batch Pan C)

Solving for mass of vacuum pan C inlet

Solving for volume of vacuum pan C inlet

(from BUSCO)


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Solving for volume required of vacuum pan C

(

)



Solving for level of syrup in the pan (from Hugot, 1986)

Solving for the diameter of vacuum pan C



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CENTRIFUGAL

Centrifugal A

Solving for the volume of A-massecuite

Solving for average centrifugal A capacity

Solving for number of units in the centrifugal

Centrifugal B

Solving for the volume of B-massecuite


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Solving for average centrifugal B capacity

Solving for number of units in the centrifugal

STORAGE TANK

Mixed Juice Tank

Solving for the volume of the mixed juice

(from BUSCO)

Solving for the required volume of the tank


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(from BUSCO manual) ( )

Solving for the height of the juice

(assumption)

Solving for the height of the tank

Assume that 80% of the height of the mixed juice tank is the height of the juice

Milk of Lime Tank

Solving for the volume of the milk of lime

(from BUSCO)


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Solving for the volume required of the tank

(from BUSCO)

( )

Solving for the height of the milk of lime

(assumption)

Solving for the height of the tankAssume that 80% of the height of the milk of lime tank is the height of the milk of lime

Limed Juice Tank

Solving for the weight of the limed juice


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Solving for the volume of the limed juice (from BUSCO)

Solving for the volume required of the tank (from BUSCO)

( )

Solving for the height of the limed juice (assumption)

Solving for the height of the tankAssume that 80% of the height of the tank is the height of the limed juice


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Clarified Juice Tank

Solving for the volume of the clarified juice

(from BUSCO)


(from BUSCO) ( )

Solving for the height of the clarified juice (assumption)

Solving for the height of the tankAssume that 80% of the height of the tank is the height of the clarified juice


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Syrup Tank

Solving for the volume of the syrup

(from BUSCO)


(

)

Solving for the height of the syrup (assumption)



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Assume that 80% of the height of the tank is the height of the syrup

Magma Tank

Solving for the volume of magma

(from BUSCO)


(from BUSCO) ()

Solving for the height of magma

(assumption)


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Solving for the height of the tankAssume that 80% of the height of the tank is the height of the magma

B-Molasses Tank

Solving for the volume of the B-molasses

(from BUSCO)


Solving for the height of B-molasses

(assumption)


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Assume that 80% of the height of the tank is the height of B-molasses

A-molasses Tank

Solving for the volume of A-molasses (from BUSCO)


Solving for the height of A-molasses (assumption)


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Assume that 80% of the height of the tank is the height of A-molasses

Final Molasses Tank

Solving for the volume of final molasses (from BUSCO)

Solving for the volume required of the tank (2 tanks)

(from BUSCO) ( )

Solving for the height of the final molasses

(assumption)


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Assume that 80% of the height of the tank is the height of the molasses

equipment sizing_raw sugar manufacture

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