Walnut Oil Production Line

Alkali Refining Operation

Adjust the oil temperature to about 60°C, then add 20-30Be alkali solution (1kg caustic soda + 5kg water alkali solution) within 5-10 minutes, stir at 60r/min for 5-10 minutes, and observe After the reaction, the soap particles form a separation state and begin to slowly heat up. Change to slow stirring speed and increase by about 1°C per minute. When the temperature reaches 65°C, the separation of oil and soap is obvious. Stop stirring and start to precipitate the soap stock. It usually takes 4 -The soap stock is released after 6 hours.

Washing Operation

After releasing the soap stock, the oil will further heat up to 75°C, and then add hot water greater than 5% of the oil weight for washing. Stir when adding water. The water temperature should be 5-10°C higher than the oil temperature. If the water temperature is too low, it will easily emulsify; add After finishing the water, continue stirring for 5 minutes, then let it stand for 3-4 hours, release the soapy water, and wash repeatedly 1-2 times, depending on the quality of the clear oil.

Decolorization Operation

Turn on the vacuum pump to make the vacuum ≧700mmHg; first suck the washed alkali-refined oil into the decolorization tank, start stirring and raising the temperature in the vacuum state, and continue stirring for 10 minutes after the temperature reaches 100°C to reduce the moisture in the oil to 0.1% below, then inhale a small amount of decolorizing agent (white clay or activated carbon). The amount added depends on the oil, generally 2%-4% of the oil. After stirring for 20 minutes, cool down to about 90°C, break the vacuum, and open the decolorizing pump to filter The machine separates oil and soil to obtain decolored oil.

Deodorization Operation

The decolorized oil is sucked into the deodorization tank from the vacuum. When the vacuum degree reaches 755mmHg and the temperature is above 150℃, open the bottom to directly steam to start distillation and deodorization, and start timing:

a. Deodorization time: 2-3h.

b. Deodorization temperature: 220℃-240℃.

c. Deodorization vacuum degree: above 755mmHg.

d. The entire process must be directly steam distilled.