Cottonseed Oil Refinery Plant Equipment for Edible Oil Production

Cottonseed oil after solvent extraction still have a certain content of residual solvent and other impurity, thus the further process of cottonseed oil refinery plant is quite important part to help users make the most efficient oil refining from crude cottonseed oil.

cottonseed oil refinery plant

Cottonseed oil refining process, there are two main methods: alkali refining and physical refining method. Alkali lye is added to the refining process of crude oil containing a weak acid for the neutralization reaction. The impurities in the crude oil (free fatty acids, phospholipids, gum, wax, pigment, oil-soluble impurities and the cake crumbs, Sediment etc.) to the oil adsorption of the foot, thus getting the purpose of ultimately cottonseed oil refinery; physical refining and bleaching method of acid value greater than when the 2 mgKOH / g, the only need to be physically refined.
Physical cottonseed oil refinery plant containing gossypol must consider the particularity to ensure the physical refining process gossypol no obvious oxidation or polymerization reaction, for which requires physical refining temperature no higher than 200 ℃, operating residual pressure of not more than 267 Pa use packing style deacidification tower, appropriate to shorten the delay time, deacidification time should be controlled within 10 min. After physical deacidification, acid oil is about 2 mgKOH / g. At the end of the physical cottonseed oil refining and then be treated with an alkali deacidification refining method. Cottonseed oil can be fully refined. The base is used in the production of refined cottonseed oil refining method, this method low investment, low consumption refining, good alkali refining quality, less waste, lower operation and maintenance costs, technology less demanding, is a simple and practical alkali refining process, in particular suitable for small and medium sized oil refinery applications.

Acid-base neutralization reaction

cottonseed oil solvent extraction plant

From pre-pressing workshop and cottonseed oil extraction plant delivery over the hair oil contains many impurities, such as free fatty acids, phospholipids, gum, wax, pigments and other oil-soluble impurities and cake crumbs, sediment and other solid impurities. In addition, cottonseed also contains 0.63% ~ 2.63% of gossypol in feed embryo steaming and roasting process, some combination of gossypol and protein production of gossypol, gossypol is another part of the process crude cottonseed oil into edible oil. Adding alkali content in oil of 0.2% to 0.5% of the amount over the base neutralization, alkali refining temperature is generally divided into low concentration of alkali (initial temperature 20 ~ 30 ℃, alkali concentration 20 ~ 25 °,and high temperature light soda (initial temperature of 75 ℃, the concentration of 1.0 ~ 16 ° . The former more common application, which is mainly applied to the lowest of acid impurities and less light color hair oil. Alkali concentration is generally 12 ~ 20Be range depending on the temperature of the alkali refining, oil color, acid value may be. A base crude oil and mixed in the reaction at an appropriate temperature, and the flocculation reaction tank, while the crude oil in a creamy, gossypol and other components are adsorbed dye in the soap feet.
Centrifugation

Separation temperature controlled at 70 ~ 80 ℃, used in the production of the soap off the centrifuge is a centrifugal machine, in order to achieve a better separation effect, when the temperature is not too high off the soap, causes the evaporation of the solvent is too high, the impact of the centrifuge normal separation, the solvent contained in the normal soap (1% to 3%). At the same time resulted in illiquid soap bubble, resulting soap is difficult to transport pump. Cottonseed oil storage tanks will also be transported to cool down.