内返料内分级喷浆造粒干燥机的返料分级机理研究Ⅶ．悬浮式螺旋进料口的内分级效率分析

Revert classification mechanism study of internal re-vert and classification spray granulation dryers. Part Ⅶ: In-ternal classification efficiency analysis at suspensory screwfeed entrance

本文建立了内返料内分级喷浆造粒干燥机悬浮式螺旋进料口的内分级效率的计算模型，认为转筒半径、粉料容积分布函数对内分级效率没有影响，推荐返料螺旋进料口相似放大宜采用的４个参量。

A calculating model of internal classification efficiencyat suspensory screw feed entrance of internal revert andelassification spray granulation dryers was established. Itwas considered that radius of drum ,and distribution func-tion of powder volume had no effect on internal classifica-tion efficiency, and four parameters were introduced forscaling-up screw entrance.