Avocado Oil Physical Refinery Line

Avocado Oil Physical Refining Line

The avocado oil extracted from the rotten avocado fruits,over ripen fruits,whole fruits with peel&skin or dried avocado fruits is relative low quality with high ffa and bad smell.All these kinds oil is called crude avocado oil. Crude avocado oil must be further processed by refining treatment for further use in the cosmetics industry or cooking function too.Because of its high acid value and low gums content, usually physical refining process by distillation is adopted to avoid high oil loss which may be caused by chemical refining process.

Drying Method Degumming Process

The avocado oil is heated to about 85°C, the edible phosphoric acid with a concentration of 85% and the amount of 0.1% of the oil weight are added by a quantitative pump, and quickly mixed with a knife mixer and mixed into the blade filter. The dephosphorized waste clay is filtered to remove residual phospholipids and metal ions and other impurities to obtain dry degummed oil. Generally, the phosphorus content of oil degummed by dry method ≤10mg/kg

Continuous Bleaching Process

70% of the dry degummed oil is heated to 100℃ and enters the decolorization tower for decolorization. After 30% of the oil enters the oil-earth mixer and mixes with the added clay,the bleaching earth is sucked into the decolorization tower by vacuum to decolorize.The decolorizing tower has a double-layer structure and is stirred by steam. The vacuum degree of the decolorization tower is -0.09Mpa, the decolorization time of the oil in the decolorization tower is 30min, and the addition amount of white clay is 2%. If the decolorization effect is not good, you can add a little activated carbon to use. 

Physical Deacidification&Deodorization Process

The decolorized oil is heated to 250-260℃ through the oil-oil heat ex-changer and final heater and then enter into the deacidification tower for deacidification.The deacidification tower is a structured packing tower.The oil flows downward on the surface of the packing from the top under the action of gravity,and fully contacts the saturated steam injected from the bottom to achieve the purpose of stripping and deacidification. The oil flow time in the tower is 5min, the direct steam consumption is 2% of the oil weight, and the vacuum absolute pressure is ≤200Pa.

Winterizing Process

Computer controls the whole operating process from pumping the RBD avocado oil into the production line to getting the final oil.The application of the reliable automatic computer control system proved by industrialization production practice ensured the crystallizer accuracy of the cooling procedure.The operation of whole factory doesn’t require human intervention embodies the advancement of computer controlling system which is practiced by prearrangement of computer software control.The whole operation is run by the central control room, including remote controllers and indicators, which guarantee all the right operation of static thermal valve, material level switch, motor and filter.