Authors

Abstract

In the buckwheat industry, buckwheat sizing effect has played a significant role in the subsequent hulling effect and food quality in its deep processing. In order to study the influence of inclination angle of linear vibrating screen on buckwheat sizing effect, EDEM was used for numerical simulation of sizing process with the inclination angle of the screen separately at 2°, 3°, 4°, and 5°. By observing particle distribution on the screen deck and calculating the different types of particles in various statistical areas, qualitative comparison and quantitative analysis on the conveying capability of the screen and the penetrating capability of particles at different inclination angles were made, and the results revealed that with the increase in the inclination angle of the screen, the conveying capability of the screen was enhanced, while particles became less capable of penetrating through the sieve. When the inclination angle was increased from 2° to 3°, the conveying capability of the screen was significantly improved, while the penetrating capability of particles on both screen decks was slightly reduced. By taking the penetrating capability of particles and the conveying capability of the screen into comprehensive consideration, it turned out that better sizing effect would be achieved at the inclination angle of 3o. Our research will provide a reference for optimizing the processing parameters during the vibrating separation of buckwheat.

Abstract in Chinese

荞麦产业精深加工过程中，荞麦分级效果对后续脱壳效果乃至食品品质都有重要的影响，为探究直线振动筛筛面倾角对荞麦分级效果的影响，利用EDEM软件对筛面倾角为2°、3°、4°、5°时的分级过程进行了数值模拟，通过观察筛面颗粒分布及对各统计区不同类型颗粒的统计，对不同筛面倾角下筛面输送能力、颗粒透筛能力进行定性比较和定量分析，结果表明：随着筛面倾角增大筛面输送能力增强，而颗粒透筛能力降低，当筛面倾角由2°增加到3°时，两层筛面颗粒透筛能力略有降低的情况下，筛面输送能力显著提高，综合颗粒透筛能力及筛面输送能力两项指标，筛面倾角为3°时分级效果较好。本研究可为荞麦振动分级过程中工艺参数的优化提供参考。