Introduction of Deacidification System of Crude Oil Refinery Plant

Deacidification system of crude oil refinery plant is for removing free fatty acids(FFA) from pressed or extracted crude oil. Since FFA would produce irritating odor and accelerate the hydrolysis rancidity rate of neutral oil, deacidification is necessary and it has long been used as the greatest economic benefits for crude oil refining process, and the removal of FFA from crude oil is also the most difficult process in the crude oil refinery plant. If the process is mature enough, deacidification could achieve the effects of removing irritating odor, inhibiting oxidative rancidity, enhancing the physical and chemical stability of oil and determining the quality of final oil product.

deacidification system of crude oil refinery plant
Common industrial deacidification methods are alkali refining (chemical deacidification method), steam distillation (physical deacidification method) and solvent extraction (mixed deacidification method), the most widely used methods are alkali refining system and steam distillation method.

Alkali Refining Process

Alkali deacidification processesAlkali refining for removing acid is the most critical step in the entire refining process, and it creates conditions for decolorizing, deodorizing, hydrogenating and deep processing of oil. After alkali refining, oil quality is improved, oil stability is increased and its storage time is prolonged. Alkali refining method is using alkali to neutralize FFA in the oil to generate soap and the generated soap can adsorb impurities. Soap and impurities are then subsided and separated from the oil by gravitational sedimentation separation method or by centrifuge. Alkali refining is divided into intermittent type and continuous type, and the intermittent type is suitable for concentrated alkali refining at low temperature with steps like pre-treatment→lye neutralization→separation of soap stock→washing separation→dehydration(desolution)→filtration→soap stock processing→packing.

Features of Oil Deacidification System of Crude Oil Refinery Plant

  • The machine capacity is customized according to your requirement.
  • Oil deacidification machine can be flexibly worked with the entire oil refining line or can be used alone.
  • The machine is made of food-grade stainless steel with polishing treatment, the materials are not stained or damaged.
  • The deacidification tank is controlled by electrical box, simple and safe operation. The customer can operate the machine well after video training.
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