Authors

Abstract

Based on the material characteristics of buckwheat, the cyclone separation and cleaning test bench were designed. The cleaning rate and loss rate of the buckwheat separation and cleaning by the influencing factors of the investigation were studied through single factor and orthogonal tests. The single-factor test results show that the cyclone separation and cleaning performance is better when the speed range of the suction fan is 800~1200 r/min, the speed range of the feeding fan is 600~1200 r/min, and the length range of the suction pipe is 100~250 mm. The regression equation model of the cleaning rate and loss rate was constructed, and the response surface analysis of the test influencing factors and their interaction was carried out. The results show that the speed of the suction fan has the most significant influence on the cleaning rate and loss rate, followed by the speed of the feeding fan and the length of the suction pipe in the separation cylinder has the least effect. By optimizing and solving multi-objective parameters of the regression equation model, reasonable experimental parameters are obtained. The appropriate speed of the suction fan is 1055 r/min, the appropriate speed of the feeding fan is 600 r/min, and the proper length of the suction pipe in the separation cylinder is 175 mm. The cleaning rate and the loss rate of the cyclone separation and cleaning system were 94.78% and 1.67%, respectively.

Abstract in Chinese

本文基于荞麦的物料特性，对荞麦旋风分离清选试验台进行了设计；通过单因素和正交试验研究了试验影响因素对荞麦分离清选的清洁率和损失率的影响规律。单因素试验结果表明：吸杂风机转速范围为800～1200 r/min，喂入风机转速范围为600~1200 r/min，吸杂管长度范围为100 ~250 mm。采用三因素三水平的正交试验，构建了试验影响因素与荞麦分离清选的清洁率和损失率间的回归方程模型，并对试验影响因素及其交互作用进行了响应面分析，结果表明：吸杂风机转速对荞麦分离清选的清洁率和损失率影响最大，喂入风机转速影响次之，分离筒内吸杂管长度影响最小；通过对回归方程模型的多目标参数优化求解，得到了合理的试验影响因素参数：吸杂风机转速为1055 r/min，喂入风机转速为600 r/min，分离筒内吸杂管长度为175 mm；在此工况条件下，荞麦分离清选的损失率为1.67%，分离清选的清洁率为94.78%。