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首页> 外文期刊>Chemical Engineering and Processing >Enhancement of tapioca starch separation with a hydrocyclone: effects of apex diameter, feed concentration, and pressure drop on tapioca starch separation with a hydrocyclone
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Enhancement of tapioca starch separation with a hydrocyclone: effects of apex diameter, feed concentration, and pressure drop on tapioca starch separation with a hydrocyclone

机译：水力旋流器增强木薯淀粉分离效果：顶点直径，进料浓度和压降对水力旋流器分离木薯淀粉的影响

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This research aims to develop a new approach replacing a centrifugal separator with a hydrocyclone in a tapioca starch production process. The studied hydrocyclone was designed on the basis of Bradley's geometry, which is suitable for starch-water separation according to a small density difference and small diameters of starch particles. Three factors, i.e., pressure drop across the hydrocyclone (ΔP), feed con-centration [C], and apex diameter (D_u), were varied into three levels at 2, 4 and 6kg/cm~2; 3,7, and 11% weight by volume; and 1.5, 2.1, and 4.0mm, respectively. The hydrocyclone's perforrnan indices (i.e., % solid recovery (%R), % split (%R_v), reduced efficiency (E')) and cut size diameter (d_(50)) were determined. The experimental results were used to construct empirical models predicting hydrocyclone efficiencies from the pressure drop, feed concentration, and apex diameter. The models for three indices were: %R= 70.71 (ΔP)~(0.15) · [C]~(-0.09) · D_u~(0.17), %R_v = 30.69(ΔP)~(-0.09) · [C]~0 · D_u~(0.47), and E' = 54.95(ΔP)~(0.31)·[C]~(-0.17)·D_u~(0.19).
机译：这项研究旨在开发一种在木薯淀粉生产过程中用旋液分离器代替离心分离机的新方法。研究的水力旋流器是根据Bradley的几何形状设计的，由于其密度差小和淀粉颗粒直径小，适合于淀粉-水的分离。水力旋流器上的压降（ΔP），进料浓度[C]和顶点直径（D_u）这三个因素分别以2、4和6kg / cm〜2的水平变化为三个水平; 3,7和11％（体积）重量;和1.5、2.1和4.0mm。确定了水力旋流器的穿孔素指数（即固体回收率（％R），分流率（％R_v），效率降低（E'））和切粒直径（d_（50））。实验结果被用于构建经验模型，该模型从压降，进料浓度和顶点直径预测水力旋流器效率。三个指标的模型为：％R = 70.71（ΔP）〜（0.15）·[C]〜（-0.09）·D_u〜（0.17），％R_v = 30.69（ΔP）〜（-0.09）·[C] 〜0·D_u〜（0.47），E'= 54.95（ΔP）〜（0.31）·[C]〜（-0.17）·D_u〜（0.19）。

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