|
Solvent Extraction
| Product Specifications: |
|
Specific gravity at 15oC ASTM
– D1298
|
0.689 maximum |
Distillation at 760 mm ASTM – D1078
Initial boiling point
Dry end point
|
65 oC
70 oC |
| Reid Vapour Pressure at 100 oF
ASTM – D-323 |
6.0 psi maximum |
| Non-Volatile Matter ASTM – D-1353 |
0.001 gms per ,100 ml maximum |
| Sulphur content ASTM – D-1266 |
10 ppm maximum |
Composition (wt.)
Normal
Hexane
Methyl Pentanes
Methyl Cyclo Pentanes |
58 to 62%
25 to 30%
10 to 15% |
| Benzene content |
1,000 ppm maximum or in accordance with
governing agency regulations. |
PROCESS DESCRIPTION
Preperation Section
In order to extract oil from oilseeds particularly Soybean,
the preparation of oil seeds plays a very crucial role. It
not only effects efficiency of extraction but also the quality
of oil extracted.
The seed preparation plant consists of seed cleaner, seed
destoner, seed cracker, cooker-conditioner, flaker and cooler.
The SOYBEAN seed is received at inlet of EL-1 and feed to
vibrating screen Seed cleaner SC-1, where in minor impurities
like straws, strings etc are removed. The cleaned seed is
stored in bin B-1. It then passes through a rotary magnet
RM to remove metal/ferrous impurities. and fed to Destoner
DS-1 to remove stones, impurities etc.,
The cleaned and destoned SOYBEAN is transferred via a Screw
conveyor item SC-1 to elevator EL-2.
A surge bin B-2 acts as a buffer between elevator EL-2 and
Seed Cracker item CR-1. The SOYBEAN is cut into 4 to 6 pieces
in the cracker and cracked seeds are elevated by elevator,
item EL-3 to feed cooker-conditioner item CK-1. Here the cracked
seed is heated by indirect steam for about half an hour and
conditioned to a given percentage of moisture through open
steam. This process give each seed required plasticity. The
cracked seed is fed via screw Conveyor item SC-2, elevator
item EL-4 and Radler conveyor item RL-1 to flakers items Fl-1/Fl-2.
The purpose of flakers is to rupture the cells of the conditioned
seeds by friction between the rolls that turn at slight differential
speed. The flake thickness can be adjusted with the help of
thickness control mechanism.
The SOYBEAN flakes can be conveyed via Radler conveyor RC-2
either directly to extraction plant incoming conveyor, item
EX-1A, or via cooler item FC.
In case of mustard seed, cooked seed is fed to expeller presses
EP1 to EP4 via Radler conveyor RC-2 and expelled cake is discharged
into conveyor Ex 1A
LIST OF EQUIPMENT
| 1. |
Elevator |
| 2. |
Vibrating Screen Seed Cleaner |
| 3. |
Seed Cleaner Cyclone |
| 4. |
Seed Cleaner Cyclone Rotary Valve |
| 5. |
Seed Cleaner Air Fan |
| 6. |
Buffer Bin |
| 7. |
Rotary Magnet |
| 8. |
Destoner |
| 9. |
Elevator |
| 10. |
Aspiration Fan |
| 11. |
Cyclone For Dust Collection |
| 12. |
Screw Conveyor |
| 13. |
Cracking Roller Mills |
| 14. |
Cooker Conditioner |
| 15. |
Radler Conveyor |
| 16. |
Flaking Roller Mills |
| 17. |
Buffer Hopper |
| 18. |
Expeller Press |
| 19. |
Radler Conveyor |
Production Capacity : 200 TPD (Capacity can be increased
as required by customer)
| a) Raw Material |
|
Soybean |
|
b) Utilities
|
Steam
Water
Compressed Air
Electricity
|
Preparation
Solvent Extraction
Clean water, non scaling and non chemically aggressive,
based on a temperature at the inlet of 32 oC;
throughput of the water in circulation 200 M3/Hr.
Compressed instrumentation air at 6 barg- dried and deoiled
– for instrumentation and controlled valves : 5
Nm3 /h for instrumentation, in each building
Installed power
Preparation
Solvent Extraction
Expeller section |
80 Kg/ton of SOYBEAN seeds
270 Kg/ton of SOYBEAN flakes
about 230 KW
about 190 KW
about 480 KW |
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