The right way to press rapeseed oil

Raw rapeseed is first sifted with vibrating sieve to remove large and small impurities. If it is necessary to remove the rapeseed material in the shoulder mud, can be used to horizontal dragon iron roller milling, and then use the flow sieve to remove the crushed mud ash. The final material in the impurity requirements of no more than 0.5%, and must strictly prevent the material with iron impurities into the oil press.

2, broken skin

The use of small rollers for milling, so that the rapeseed grain broken skin. Requirements for broken skin is not off, but also not crushed, "open smile" shape, broken skin rate of not less than 85%; powder degree of not more than 5%, the operation should be fed evenly, the flow is appropriate, and the spacing of the milling rollers adjusted appropriately.

3, add water

Rapeseed material into the pan, while stirring to add some hot water, the amount of water added to the material in the water content of 13% -15%.

4, frying

The oil press equipment more than a pan (can also be used cylinder frying pot, good results), frying the final material temperature of 120 ℃ -132 ℃, frying cooked material with a hand to hold the material does not show oil, flexible, loose that is scattered, even cooked not clip raw. After frying cooked material residual moisture is about 2%. At the same time to ensure that the material temperature into the oil press is 120 ℃ -125 ℃.

5, pressing

After the normal preheating of the press chamber, you can begin to formally cast the cooked material, and adjust the thickness of the cake for 1.25-2.5 mm. The effect of pressing is good or bad, can randomly determine whether the fried material is qualified. So the pressing operation should be observed, checked and adjusted diligently. In order to maximize the oil yield of the press, the press cake should be adjusted to some thin, but the requirements of the cake shall not smoke and burnt, dry cake residual oil control between 5% -6%.

6, gross oil treatment

Expressed gross oil into the oil pool, the first by precipitation to remove solid impurities, such as the requirement for further removal of impurities, you need to configure a filter, you can get clear oil.