I. Principle and function of the puffing process
Puffing in the leaching process stage of the soybean oil production line refers to steaming the soybeans to make their water content reach 10%~12%, and then heating and puffing them through the puffing machine to make the beans swell and burst, releasing the internal protein and oil. The surface area of the puffed soybean particles is greatly increased, which is conducive to the penetration and extraction of oils and fats, and also makes the protein in the soybean meal easier to digest and absorb, improving its nutritional value.
II. Puffing equipment and operation methods
Puffing equipment mainly includes steam boilers, puffing machines, coolers and conveyors. During the puffing process, the following operating points need to be mastered:
1. Control the steam temperature and pressure to ensure that the moisture content of the soybeans reaches 10%~12%.
2. Control the temperature and pressure of the puffing machine to ensure that the beans can be fully expanded but not broken.
3. Control the temperature and speed of the cooler to quickly cool down the puffed soybeans to prevent the influence of excessive heat treatment on the quality of the oil.
4. Keep the equipment clean and maintained to avoid the influence of impurities and contaminants.