多种颗粒尺寸旋风除尘器的数值模拟

Numerical Investigation on Collecting Efficiency of Particles with Different Sizes by Cyclone Dust Collector

旋风除尘器具有分离效率高、设备体积小等特点,对特定尺寸的旋风除尘器进行了建模,并对去除混入到空气中的微小颗粒进行了仿真分析。结果表明:最佳的旋风除尘器运行空气及颗粒入口速度在15 m/s,此时收集效率最高为88.89%;旋风除尘器运行空气及颗粒入口速度低于15 m/s时,速度越低,颗粒收集效率越低;旋风除尘器运行空气及颗粒入口速度高于15 m/s时,更多的小颗粒悬浮在除尘器中,颗粒收集效率略有下降;旋风除尘器运行空气及颗粒入口速度越高,压力损失越大,能耗越高。

Cyclone dust collectors have the features of high collecting efficiency and compact size. The model of a cyclone dust collector with a given size is built, and the separation of the tiny particles from the air is numerically analyzed. The results indicate that the optimal inlet speed of the air and particles is 15 m/s. In this case,the collecting efficiency can be maximized to be 88.89%. When the inlet speed of the air and particles is less than 15 m/s,the collecting efficiency is decreasing with the decreasing speed. While if the inlet speed of the air and particles is more than 15 m/s,the collecting efficiency has a small drop because more particles are suspending in the collector. With the increasing of the inlet speed of air and particles, the pressure loss and the energy consumption are both increasing.