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研究内返料内分级喷浆造粒于燥机的返料流量．通过分析粉料与螺旋通道进料口的相对运动揭示粉料进入螺旋通道的机理．利用积分法建立了返料流量的计算模型．返料流量等于螺旋通道进料口在单位时间内平均穿越的料层体积与有效返料系数之积讨论了有效返料系数的控制变量及其受装载系数的影响．
Within the study of the material within the grout grading spray dryer in the back flow. By analyzing the relative movement between the powder and the inlet of the spiral channel, the mechanism that the powder enters the spiral channel is revealed. The integral method is used to establish the calculation model of return flow. The return flow rate is equal to the product of the feed volume of the spiral passage that is averaged over the unit time and the effective feed back coefficient. The control variables of the effective feed back coefficient and its influence on the loading factor are discussed.