Currently, the commonly used processes in industrial production are pressing and extraction methods to produce cottonseed oil. The cottonseed oil pressing process extracts oil by physical extrusion, and then removes various impurities in oil through cottonseed oil refining machine to improve its quality and edibility.
The cottonseed oil extraction machine produces oil by fully soaking the solvent to extract the oil. In the cottonseed oil extraction process, not only can the oil extraction performance of the solvent be fully utilized, but also methanol can be used to separate cottonphenol to achieve the ideal effect. The mixed oil obtained by cottonseed oil extraction machine is separated from the solvent and oil by evaporation and stripping, and then condensed and recovered to obtain cottonseed crude oil. Similarly, crude cottonseed oil also needs to be removed from impurities by oil refining equipment to improve edibility and obtain finished cottonseed oil. The cottonseed meal obtained by extraction treats cottonseed under low temperature conditions to avoid protein denaturation and destruction, and ensure the nutritional value of cottonseed protein products. Cottonseed cake can be used in protein extraction or animal feed industries after dephenolization and desolventization.
The oil extraction process has a large daily processing capacity, high efficiency, and a high degree of automation. It can be used for the processing and extraction of a variety of oil materials, such as common soybeans, peanuts, rapeseed, corn and other bulk oil materials. It is suitable for edible oil processing plants with a daily processing capacity of more than 30 tons. The extraction process can save manpower and material resources, and the extraction is sufficient. After extraction, the residual oil in the cake can be controlled at about 1%, and the quality of the cake is also improved accordingly. For the oil mill, it avoids the waste of oil resources and improves the overall efficiency of the oil mill. However, there are naturally advantages and disadvantages. The oil extraction process uses solvent immersion to extract oil. There will be solvent residues in the crude oil obtained. It needs to be refined and removed by refining equipment before it can be eaten. In addition, the high degree of automation and large output of the oil extraction plant mean that the equipment investment is large, and there are also requirements for the capital budget of the oil mill.
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