Rice bran oil is mostly extracted by extraction equipment. The commonly used extractors in my country’s oil and fat industry are: tank group extractors, flat rotary extractors, drag chain extractors, crawler extractors and ring drag chain extractors. Except for the tank group extractors which are intermittent immersion extractors and the drag chain extractors which are continuous immersion extractors, the rest are continuous percolation extractors.
The selection of rice bran oil extractors should follow the following principles:
- Continuous production, stable and reliable indicators
- High extraction efficiency and few extraction stages, clear stages, no mixed flow,
- Strong adaptability, large operating flexibility, and power saving
- Simple structure, reasonable tightness, and convenient operation and maintenance.
According to the principle of continuous production, the continuous extraction method of extractors includes: flat rotary extractors, drag chain extractors, crawler extractors, and ring drag chain extractors.
According to the principle of high efficiency, flat rotary extractors and ring drag chain extractors should be selected. Both extractors have the characteristics of high extraction efficiency such as few extraction stages, distinct stages, and no mixed flow. However, the drag chain extractor has unclear extraction stages and serious mixed flow. And the belt type.
According to the principle of adaptability, the loop extractor should be selected.
The material layer of the flat rotary extractor is 4-5 times higher than that of the ring extractor. For rice bran meal with small particles and large powder degree, it is bound to cause pipe burst, bridging and non-seepage during the soaking process, thereby affecting production and causing various indicators to exceed the standard, which is also proved by practice.
In summary, the loop extractor is currently the most suitable equipment for rice bran extraction. The advantages of using an annular extractor to extract rice bran are as follows:
- The material layer of the loop extractor is thin, and the material layer will have a large flip during the extraction process. During the flipping process, the material layer will be evacuated. On the other hand, a diversion of the penetration direction is achieved on the cross section, so that the material blanks that have been freed of solvents before and after are exposed to the solvent first. Therefore, the loop extractor can better adapt to the defects of poor permeability and high adhesion of rice meal due to large powder size and small particles.
- The loop extractor has a fixed self-cleaning V-shaped shelf, which ensures reliable liquid filtration and drying, so the wet meal contains less solvent.
- The loop extractor can be mass-produced in professional factories according to components, transported in sections, and assembled on site, which improves the accuracy and speed of manufacturing and reduces costs.
Henan Huatai Cereals and Oils Machinery Co., Ltd. has been committed to the production and research and development of grain and oil machinery for 36 years and has a deep understanding of oil and fat equipment. The factory covers an area of 170 acres, with standardized production workshops and mature equipment manufacturing technology, providing customers with high-quality and cost-effective refined oil equipment. We have served more than 1,000 oil mills in the past 39 years, and our products have been sold to more than a dozen countries, and have been well received by customers all over the world!
Website: https://ricebranoilpress.com
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