Sesame oil production line including: Cleaning—-pressing—-refining
1. Cleaning(pre-treatment) processing for the sesame oil production
As for the cleaning processing for the sesame production line, It
is including the cleaning, magnetic separation, flake, cook, soften
and so on, all the steps are prepared for the oil pressing plant.
2. Pressing processing for sesame oil production line
After the cleaning(pre-treatment), the sesame will go to the
pressing processing. As for the sesame, there are 2 kinds of oil
press machine for it, screw oil press machine and hydraulic oil
press machine, we can design the pressing plant according to the
3. Refining processing for sesame oil production line
After pressing, we will got the crude sesame oil, and then the oil
will go to refining plant.
The flowchart of refining processing is Crude sesame oilDegumming
and DeacidificationDecolorizathinDeodorization—Refined cooking oil.
Introduction of sesame oil refining machine
Neutralization: the crude oil is output by the oil feed pump from
the oil tank, and next enters the crude oil heat exchanger to
recover part of heat after metering and then is heated to the
required temperature by the heater. After that, the oil is mixed
with the metered phosphoric acid or citric acid from phosphate tank
in the gas mixture (M401), and then enters the conditioning tank
(R401) to make the non-hydratable phospholipids in oil change into
the hydratable phospholipids.
Add the alkali for neutralization, and the alkali quantity and
alkali solution concentration depend on the quality of the crude
oil. Through the heater, the neutralized oil is heated to the
temperature (90℃) suitable for centrifugal separation to remove the
phospholipids, FFA and other impurities in the crude oil.
Then the oil goes to the washing process.
Washing: there is still about 500ppm soap in the neutralized oil
from the separator. To remove the remaining soap, add into the oil
about 5~8% hot water, with water temperature 3~5higher than the oil
generally. To achieve more stable washing effect, add phosphoric
acid or citric acid when washing. The re-mixed oil and water in the
mixer is heated to 90-95℃ by the heater, and then enters the wash
separator to separate the remaining soap and most water.
The water with soap and oil enters into oil separator to separate
out oil in the water. Further catch the oil outside, and the waste
water is discharged to the sewage treatment station.
Vacuum drying stage: there is still moisture in the oil from the
wash separator, and the moisture will affect the stability of the
oil. So the oil at 90℃ should be sent to vacuum drier to remove the
moisture, and then the dehydrated oil goes to the decoloring
process. Finally, pump out the dry oil by canned pump.
Continuous Refining Decoloring Process
The main function of decoloring process is to remove oil pigment,
residual soap grain and metal ions. Under negative pressure, the
mechanical mixing method combined with steam mixing will improve
the decoloring effect.
The degummed oil firstly enters into the heater to be heated to the
appropriate temperature (110℃), and then goes to the bleaching
earth mixing tank. The bleaching earth is delivered from the low
bleaching box to the temporary tank by wind. The bleaching earth is
added by automatic metering and is interlockingly controlled with
The oil mixed with the bleaching earth overflows into the
continuous decolorizer, which is stirred by non-powered steam. The
decolored oil enters into the two alternate leaf filters to be
filtered. Then the filtered oil enters the decolored oil storage
tank through the security filter. The decolored oil storage tank is
designed as the vacuum tank with the nozzle inside, so as to
prevent the decolored oil contacting with the air and influencing
its peroxide value and color reversion.
Continuous Refining Deodorizing Process
The qualified decolored oil enters into the spiral plate heat
exchanger to recover most of the heat, and next goes to high
pressure steam heat exchanger to be heated to the process
temperature (240-260℃) and then enters the deodorization tower. The
upper layer of combined deodorization tower is the packing
structure which is mainly used to remove the odor producing
components such as free fatty acid (FFA); the bottom layer is the
plate tower which is mainly for achieving the hot decoloring effect
and reducing the peroxide value of the oil to zero.
Oil from the deodorization tower enters into the heat exchanger to
recover most of the heat and makes further heat exchange with crude
oil, and then is cooled to 80-85℃ through the cooler. Add the
required antioxidant and f