Why is the oil squeezed by the multi-function oil press black
What is the reason why the multi-function oil press squeezes out black oil? We all know that the processing technology of the multi-function oil press is the "physical squeezing method". The production process of the physical squeezing method requires the selection of raw materials, and the oil is removed and removed. After the stone is steamed, fried and squeezed, the crude oil is separated from the oil. The crude oil needs to be fried before the process of pressing the crude oil. After being pressed by a multifunctional screw press. It not only maintains the original taste of the edible oil, has a mellow fragrance, is rich in vitamin E, and has a greatly extended shelf life. It does not require any additives and does not contain any solvents. It is a purely natural product produced by a combination of modern technology and traditional technology. Green food.
Hot pressing is often first heated by oil pretreatment, such as heating the oil with a drum wok, which increases the fluidity of the oil inside the oil, increases the saturation of the oil cells, and at the same time Because the artificial frying can not completely control the heat and temperature, the skin of the oil crop is carbonized. The oil fiber and skin are scorched and enter the blast chamber of the oil press and then undergo high-pressure rotary extrusion. The blackened carbon residue and some fine impurities are mixed. The oil is discharged from the multi-function oil press bar, so that the crude oil looks black, which seriously affects the color and taste of the oil
Furthermore, the linoleic acid and linolenic acid of some oils themselves contain melanin, such as flax and rapeseed. If the low-temperature cold pressing process is used, the oil squeezed from the screw press is still dark in color, that is, the essential melanin is over. weight. To solve this problem, the decolorization can only achieve a very obvious effect unless a scouring process is used.
In the actual oil extraction process, we often encounter a lot of situations, that is, the problem of the oil extraction process itself. We cannot invest in a set of oil refining equipment just for a single color problem, so we solve the problem of oil extraction. The problem of oily black oil is that in the process of frying oil, try to use constant temperature, strictly control the heating temperature, appropriately extend the frying time, and try to use a multi-function oil press for the oil pressing equipment, because the row machinery can provide large The high pressure of the blast chamber ensures that the oil crops enter the chamber of the multi-function screw oil press to squeeze the oil cleanly and form a cake, which greatly reduces the second high temperature extrusion.
