We have experience and advanced machinery of making soybean. The crude oil extracted from oil press or solvent process, which should be refined for better edible oil. The capacity is from 1t to 300t per day. Normally capacity is less than 10t and directly pressing is better. The oil pressing is as follows:
In a first way, oil pressing plant is composed of seeds cleaning & crushing unit, steaming and drying units, pressing unit, conveyor, electrical cabinet box, etc. The oil pressing unit as the main stage makes the flakes in a hardened cage to squeeze oil content out. It’s a complete set of oil press, which is automatically operated to save more labor and cost, including the following machinery and parts: electrical apparatus control, materials feeder, screening machine, steaming & frying machine, huller machine, medium boiler, etc. The by-products from the oil press are cakes and soap residue. The cake could be used as animal food with our pellet machinery, or source material for the other way of extraction. Soap residue is the source material for laundry soap with soap making machinery and washing detergent. In fact, the soybean could directly be extruded, then go to sol-venting, so it could save more investing cost. We suggest the clients use this process better.
The second way to extract oil for using a chemical solvent to dissolve oil content contained in cake or direct oilseeds, only for lower oilseeds like soybean. Then oil is separated from the solvent by vaporizing solvent out. In configuring the solvent extraction plant, pre-pressing may be involved in which case seeds are lightly pressed, and which leaves about 14% to 18% oil in the pressed cake. Solvent extraction will further process these cakes and leave less than 1% oil in the final cake. This method results in higher yields, more oil; Lower power consumption, lower wear & tear/maintenance and high extract efficiency. Thus it could be used as complement equipment to extract the oil remained in the cake, which yields are extra profits. Certainly, if the capacity is less than 50 tons, or it is a high rate of output oil, this process could be saved.
The crude vegetable oil from above mentioned two ways of extracting, oil pressing and/or solvent extraction, will be pumped into oil refinery units to produce cooking oil at various grades. The main equipment of oil refinery is various kinds of vessels and tanks carrying on different tasks with additives. These tasks may include sedimentation/filtering, neutralization (removing free fatty acid), degumming, decolorization (bleaching), deodorization, dewaxing etc. Different combination of steps and the treating degree of each step result in different grade cooking oil and salad oil.
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