Walnut oil refining equipment

The walnut oil refining unit belongs to intermittent refining and has all the functions of large and medium-sized equipment for intermittent refining. Refining unit complete set combination, self provided heat source, electrical control, light weight, low power consumption. Customers only need to connect the power and tap water (a 2-meter-high water tank is also acceptable) when they go home, and prepare a small amount of coal or firewood, caustic soda, phosphoric acid, and clay. This unit does not require a dedicated factory building or foundation, and can be used both indoors and outdoors.

Equipment Description for Walnut Oil Refining

Neutralization pot: used for acid refining, alkali refining, and water washing;

Decolorization pot: used for bleaching oil and removing pigments;

Deodorizing pot: used to remove the odor of oil and fat;

Thermal oil furnace: provides the required heat energy for production;

Vacuum pump: provides the necessary vacuum degree for decolorization and deodorization;

Air compressor: blow dry decolorized clay;

Filter press: filter clay;

Steam generator: produces steam required for deodorization distillation.

Walnuts have an oil content of up to 70-75%. Walnut oil is extracted from walnut kernels, and its fatty acid composition is mainly composed of linoleic acid 54.3%, oleic acid 20.3%, linolenic acid 16.8%, and unsaturated fatty acid content of about 87%. Linoleic acid can affect the synthesis, oxidation, and excretion of cholesterol in the body, helping to prevent skin keratinization, enhance tissue regeneration function, and immunity.

Walnut kernels are pressed to obtain crude oil. The crude oil is heated at an initial temperature of 45 ℃, with a sodium silicate content of 0.15% (based on the crude oil content), an alkaline solution concentration of 12.62%, and a precipitation time of 4 hours. The heating water content is 3% to 5% (based on the crude oil content), and the hydration time is 2 hours. The amount of active decolorizing clay (II) is 2%, the vacuum degree is 10kPa, the drying time is 1 hour, the decolorization temperature is 100 ℃, and the time is 30 minutes; Under the conditions of deodorization temperature of 200 ℃, vacuum degree of 10kPa, and deodorization time of 5h, high-quality and high-grade cooking walnut oil can be obtained through refining. Among them, the content of unsaturated fatty acids is as high as 90%, the content of linoleic acid is 75%, and it also contains various unsaturated fatty acids such as linolenic acid.

The extraction and refining process of walnut oil is as follows:

Walnut → Walnut kernel → 120 degree drying → Pure physical walnut oil press pressing → Walnut oil → Deacidification → Degumming → Drying decolorization → Deodorization → Refined walnut oil The optimal extraction and refining process for walnut oil: using petroleum ether as the extraction solution, extract for 8-10 hours at 30-40 degrees Celsius, with an initial alkali refining temperature of 40 degrees Celsius and an alkali concentration of 10.45%. The total amount of alkali added can be determined based on the crude oil acid value (the alkali added in this experiment is 0.1% of the crude oil), and the stirring speed is 60 r/min; Degumming involves adding 2% -6% water for 5-6 hours, followed by vacuum drying at a vacuum degree of 700-730mmHg, a temperature of around 110 degrees Celsius for 50 minutes. Activated carbon is then added at 0.5% -2%, followed by decolorization at 110 degrees Celsius for 10-20 minutes, followed by deodorization at a vacuum degree of 720mmHg and 190 degrees Celsius for 3-5 hours.