ca09 - solid - liquid phase separation.pptcesonoma.ucdavis.edu/files/27769.pdf · solid - liquid...
TRANSCRIPT
2
Extraction efficiency
Very good efficiency: >90.0%
Benchmark efficiency: >85.0%
Unacceptable: <70 0%Unacceptable: <70.0%
Extraction efficiency
E.E.=1-(Oil pomace*(100-Oil fruit))/(Oil fruit*(100-Oil pomace)
Or
< 8.0% oil/dry matter in the pomace
With 50% moisture fruit = 3.0% oil/fresh in pomace
With 60% moisture fruit = 2.0% oil/fresh in pomace
3
Extraction efficiency
Marino Uceda – Australia 2005
Fruit and moisture levels
Fruit moisture vs. extraction efficiency - Plant A
50.00%
60.00%
70.00%
80.00%
90.00%
100.00%
it m
oist
ure
& ex
trac
tion
effic
ienc
y (%
)
40.00%0 5 10 15 20 25
Samples
Fru
Moist Eff iciency Linear (Eff iciency) Linear (Moist)
4
Fruit and soil moisture
Fruit moisture vs. extraction efficiency - Plant BFruit moisture vs. extraction efficiency Plant B
50 00%
60.00%70.00%80.00%90.00%
100.00%110.00%
ruit
moi
stur
e an
d ef
ficie
ncy
(%)
40.00%50.00%
0 10 20 30 40 50
Samples
Fr
Fruit moisture Efficiency Poly. (Eff iciency) Linear (Fruit moisture)
ProcessingEvolution of processing efficiency at Boort
60.00
70.00
80.00
90.00
100.00
Frui
t Moi
stur
e (%
)
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
Proc
essi
ng E
ffici
ency
(%)
Rain
40.00
50.00
4/17/2
007
4/19/2
007
4/21/2
007
4/23/2
007
4/25/2
007
4/27/2
007
4/29/2
007
5/1/20
07
5/3/20
07
5/5/20
07
5/7/20
07
5/9/20
07
5/11/2
007
5/13/2
007
5/15/2
007
5/17/2
007
5/19/2
007
5/21/2
007
5/23/2
007
5/25/2
007
5/27/2
007
5/29/2
007
5/31/2
007
6/2/20
07
Date
0.0%
10.0%
20.0%
Fruit Moisture %
OperatingEfficiency
7
Capacity of the Decanter
• Viscosity (Temperature).• Length.• Diameter.• Differential between screw and bowl.• Particle size (Crushing)• Particle size (Crushing).
Capacity of the Decanter
8
Efficiency of the Decanter
• Density difference between phases (Talc – Water - Crushing).• Speed of rotation.• Size of phases (Decanter plates).• Separation time (Pumping speed).
Capacity vs. Equipment
11
Pumping speed
13Speed 1 (65% TC) Speed 2 (80% TC)
9
10
11
12 p
om
ace
(%)
5
6
7
8
1 2 3Samples
Oil
in
Processing
Oil losses Pump speedFruit moisture
12
Pumping speed
• How do I know if I am pumping too fast?p p g
• Oil losses above limit.• Oil comes out dirty (Not always).
• How do I know if I am pumping to slow?
• No problems apart from increased costs.• Do not go under 40% NC of the Decanter.
Pumping speed
15
Decanter platesPlate 99 Plate 100 Plate 101
8
9
10
11
5
6
7
Without water 6% WaterMarino Uceda – Australia 2005
Decanter plates
• How do I know when to change the plate?g p
• Once you have tried everything else and the oil still comes out very dirty and with very low Decanter capacity. Put an smaller plate.
• Or if there is too much oil in the decanter. Stop the feeding pump into decanter, flush it with water and the amount of oil that is obtained should not exceed
f f1.5 % of the TC of the decanter. E.g.: 5 tn/hr should not produce more than 50-75 litres. Put a larger plate.