Let's go into the various stages of oil production and get familiar with how cooking oil is refined, and learn more about the role of heat exchangers in the whole process of oil production.
The raw material for most of the edible oil is the familiar soybean. Soybeans need to be pre-treated before they enter the oil press.
Soybeans need to be cleaned, crushed, softened, rolled embryo, steamed and fried and other multi-step processes to produce edible oil suitable for us to eat.
The edible oil companies not only ensure the quality and oil yield of the pressed oil, but also find ways to treat the waste water and exhaust gas discharged during the production process and the use of waste heat, which requires the selection off the use of heat exchange equipment in the traditional production process or in new projects in order to achieve the purpose of energy saving and emission reduction.
Soybean pre-treatment before pressing
Impurities contained in soybeans are divided into three categories: organic impurities, inorganic impurities and oil-bearing impurities.
Most of the impurities themselves do not contain oil, in the process of processing not only out of oil, but will adsorb a certain amount of oil in the meal, containing impurities such as soil, stems and leaves, hulls and other impurities will deepen the color of oil, odor and other undesirable phenomena; containing stones, iron and other hard objects will wear equipment.
Therefore, effective cleaning and debridement should be carried out before processing to reduce grease loss, improve oil yield and extend the service life of equipment, etc. Cleaning mainly includes air separation, magnetic separation and screening.
The temperature and moisture of cleaned soybeans are adjusted by indirect steam heating and hot air convection drying, at which point a set of tempering tower equipment is required to complete this work.