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Rapeseed pre-press process

Rapeseed pre-press process:
(A) rapeseed clean dry: rapeseed oil refinery will inevitably enter a folder with some impurities. Before entering the press if you do not remove entrained dirt sesame fruit, stems and leaves and other debris, they will not only affect the quality of oil and meal, and will absorb part of the oil, reducing the oil yield. If the sesame fruit in the folder gravel, metal, rope and other debris, it will cause engine wear, etc., to induce the production of an accident, the impact of process effect. Therefore, in order to ensure smooth production, must try to remove impurities, high water content of rapeseed individual fruit, in order to facilitate the shelling, drying process is also very necessary. Many ways to clean up, specifically using different methods depending on the circumstances of impurities. If impurities contained light, such as grass, stems, etc., can be used winnowing approach, with air blown off impurities. If the impurity particles is small, you can choose to remove impurities. For after some size, relative density and rapeseed similar impurities, if they are dirt blocks can crush friction in the mud machine, then screening removed. If the case of the impurities of iron, a permanent magnet or electromagnet may be used rows separated. Impurity content should be below the cleanup.

(2) heat (steam fried): Heat treatment is rapeseed pre-press process, one of the most important processes. And wet heat treatment involves heating the green body in the production of fried called blank or preform was evaporated, the blank is called after the steam cooked fried blanks. Where the green pressed after heat treatment called hot pressing, without heat treatment are known as cold pressing. The main hot-pressed rapeseed. The quality level of the effect of heat treatment and the quality of the smooth process of the oil and the oil yield of oil, meal has a direct impact.
(3) press: Spiral rapeseed rapeseed oil press is very extensive pre-press process using a small press, simple structure, high pressure, continuous processing of materials, low labor intensity, you can squeeze more than kind of oil. Because of its circular cage bars jagged curves and cone, the volume of material being squeezed when driven by the pressing screw and squeeze and squeeze cage so pressing Lo changing the inner wall space in the rear of the cage due to pressing cage bars are arranged in a circle, the inner wall pressing the cage serrated where the preform by alternately squeezing and relaxing the structure of the preform continues to be adjusted to obtain a uniform change, causes not squeeze the oil or oil-less squeeze the preform has a greater chance of being fully squeezed. So it's squeezing effect is better.

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