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Oilseed pretreatment cleaning equipment is a key equipment in the oil processing process. It is mainly used to remove impurities in oilseeds (such as soybeans, rapeseeds, sunflower seeds, peanuts, cotton seeds, etc.), including dust, sand, straw, metal debris, etc., to ensure the smooth progress of subsequent pressing or leaching processes. Efficient cleaning screens can improve oil purity, reduce equipment wear, and improve oil quality and oil yield.
The method of oil purification is mainly based on the differences in physical properties such as particle size, specific gravity, shape, surface state, hardness, magnetism, gas dynamics, etc. between oil seeds and impurities. Screening, magnetic separation, air separation, specific gravity separation and corresponding equipment are used to remove impurities in the oil.
Screening is to use the difference in the size of oil and impurity particles, and with the help of the relative movement between the oil-containing material and the screen surface, impurities larger or smaller than the oil are removed through the screen holes. Commonly used screening equipment in oil mills include vibrating screens, flat rotary screens, rotary screens, etc. All screening equipment has an important working part, namely the screen surface.
The method of using wind power to separate impurities from oilseeds by taking advantage of the difference in specific gravity and aerodynamic properties between oilseeds and impurities is called winnowing. Winnowing can remove light impurities and dust from oilseeds, as well as heavy impurities such as metals and stones. It can also be used to separate kernels from shells after shelling.
The specific gravity method of stone removal is based on the different specific gravities and suspension speeds of oil and stone. It uses the combined effect of an inclined screen surface with certain motion characteristics and the air flow passing through the screen surface to achieve the purpose of graded stone removal.
The machine usually adopts a double-layer screen plate design, and its key component, the screen box, is supported by a hollow rubber spring and driven by one or two vibrators. Vegetable seeds such as soybeans and sunflower seeds are fed in through the feeder on the top of the machine. With the vibration of the screen plate and the flow of air, the materials are layered on the pre-separation screen plate according to their specific gravity, with light impurities on the top and heavy impurities on the bottom. Finally, the stones in the seeds are separated by the countercurrent airflow, and the stone-free materials are discharged through the squeeze rubber valve. The best cleaning effect can be achieved by adjusting the inclination of the screen plate and the air volume.
Magnetic separation is a method of removing metal impurities from oilseeds using magnets. Although the content of metal impurities in oilseeds is not high, they are very harmful and can easily damage equipment, especially some high-speed equipment, and may even cause serious equipment accidents and safety accidents, so they must be removed. Magnetic separation equipment includes magnetic steel, permanent magnetic cylinder, permanent magnetic drum, electromagnetic drum, etc., depending on the way it obtains magnetism.
1.
Reduce the loss of oil during processing, thereby improving the efficiency of oil extraction.
2.
Optimize the quality of edible oils and their by-products to ensure that products meet high standards.
3.
Reduce the wear of mechanical equipment during operation and extend the service life of the equipment.
4.
Prevent possible accidents during the production process and ensure a safe and stable production environment.
5.
Improve the effective capacity of oilseed processing and achieve efficient production.
6.
Reduce dust concentration in workshops, improve working environment and protect employee health.
Different oilseeds require different cleaning equipment. Our engineers can help you choose the most suitable cleaning equipment according to your raw material conditions and needs. We can help you design a dedicated edible oil production line based on the raw materials you use. If you want to know more about oilseed processing plants, please feel free to contact us.
