ABSTRACT

A new theoretical formula can be used to calculate superficial velocity for particle separation with a critical condition, and it is based on the size, density, terminal velocity, Reynold number of the particle, and equipment parameters. In a continuous system, a series of fractionation experiments were conducted to quantify the separation performance ranges for various operational factors, including channel spacing, solids throughput, and split fluidization rate. A great fluidization environment can be created by the 6 mm channel spacing, and the solids throughput of 10.20 t/(m²h) provides a well effective separation result in the narrow channels, and the split fluidization of 0.0058 m/s can produce a higher shear induce force in the inclined channels to prevent the low-density particles from being lost in the underflow. The theoretical superficial velocity calculated by the new formula is 0.042 m/s, which can report the particles up and down to 9-fold to the overflow, it is almost the equal to the actual superficial fluidization velocity of 0.04 m/s.

摘要

一个新的理论公式可以用来计算临界条件下颗粒分离的空塔速度，它是基于颗粒的尺寸、密度、终端速度、雷诺数和设备参数。在连续系统中，进行了一系列分馏实验，以量化各种操作因素的分离性能范围，包括通道间距、固体吞吐量和分流流化率。6 mm 通道间距和 10.20 t/(m ²h)在狭窄通道中提供了良好的分离效果，0.0058m/s的分流流化可以在倾斜通道中产生更高的剪切诱导力，以防止低密度颗粒在底流中丢失。新公式计算出的理论表观速度为0.042 m/s，可将颗粒上下9倍报溢流，与实际表观流化速度0.04 m/s几乎相等。