PSC型导叶式旋风管内颗粒返混夹带实验研究

摘要

采用五孔球探针测量仪与等动采样法,对PSC型导叶式旋风管内气固两相流场、浓度场分布进行测试,并对不同排尘结构进行比较,据此研究了PSC型导叶式旋风管内的颗粒返混夹带现象.结果表明,排尘段返混存在两个区域,返混夹带主要以10μm以下小颗粒为主,开缝后的排尘锥具有很强的抗返混能力.%The distribution of gas-solid two-phase flow in the PSC-type guide vane cyclone tube was measured with five-orifice pitot tube and by means of isokinetic sampling method. The characters of flow field and concentration field were investigated under different dust discharge structures of the cyclone tube. The back-mixing of particles in the PSC-type guide vane cyclone tube was investigated on these grounds. The results showed that the back-mixing of particles in the dust discharge section existed in two areas, the samll particles under 10 μm were the main part in the back-mixing of particles. The dust discharge cone had strong ability to resist the back-mixing of particles, and openning slots can strengthen this ability.