摘要
根据计算模型的计算结果给出了轻质分散相旋流器中结构参数对旋流器分离性能的影响以及影响方式,其中旋流器尺寸的增加将导致分离能力的降低,具体表现为分割尺寸d50与旋流器尺寸的平方根成正比;锥段半锥角的增加也将降低旋流器的分离能力,表现为分割尺寸d50随半锥角的增加而增加,主要的原因是在其它尺寸保持不变时,半锥角的增加减少了锥段的分离空间、减少了流体在锥段的停留时间;底流口以及溢流口的尺寸是以一个组合参数的形式对旋流器的分离性能产生影响的,这两个参数的变化不仅改变分割尺寸d50,而且改变迁移率曲线的陡度,因此在分离固体颗粒时,可以通过改变底流口与溢流口的尺寸来改善水力旋流器对颗粒的分级性能。
The effects of structural parameters on the separating capacities of single-cone light dispersion hydrocyclones were theoretically predicted based on the previously developed computational model. The analysis reveals that the capacity of a hydrocyclone decreases with its dimension in the manner of d_(50) ∞[KF(]R_0[KF)] while keeping the hydrocyclone number constant. The increase in the semi cone-angle, according to the calculated results, also leads to the increase in d_(50). However, both variations in R_0 and semi cone-angle does not change the relationship of the reduced migration probability versus the dimensionless particle diameter d/d_(50). In comparison, the diameters of underflow and overflow orifices affect the separating capacity of hydrocyclones in different manners. They change the cutting size d_(50), and also the slope in the migration probability curve MP′ vs. d/d_(50). The latter can be used to improve the particle-classifying characteristics of hydrocyclones when low-density solid particles are separated from overflow streams.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2004年第5期69-73,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
北京市自然科学基金的资助(8032006)
关键词
水力旋流器
分离性能
结构参数影响
理论预测
hydrocyclone
separating characteristics
effects of structural parameters
theoretical predictions
