Basing on the traditional oil refining technology, Henan Qi’E Grain
& Oil Machinery Co., Ltd has developed the latest combined
packing layer plate deodorization soft tower and the physical and
chemical mixed refining technology for crude oil of any quality.
Moreover, a series of advanced technology and equipment are used,
such as super wet deguming, bleaching earth automatic metering,
negative pressure decoloring, high vacuum steam jet deodorization,
deacidification, winterization dewaxing etc.
With advanced technology, superior equipment, full-automatic
control and excellent economic and technical parameters, our
equipment can meet customers’ different refining requirements at
home and abroad.
Main Processes Introduction:
1. Hydration Deguming & Alkali Refining Deacidification Process
2. Continuous Refining Decoloring Process
3. Continuous Refining Deodorizing Process
4. Automatic Control System
1.Hydration Deguming & Alkali Refining Deacidification Process
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, and then enters the conditioning tank 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 temperaturesuitable 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
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 flavor agent, and then cool the oil below
50℃ and store it. Such volatiles as FFA from the deodorizing system
are separated by the packing catcher, and the separated liquid is
FFA at low temperature (60-75℃).
When the liquid level in the temporary tank is too high, the oil
will be sent to the FFA storage tank.