摘要
为了提高旋风分离器分离效率,采用实验和CFD模拟相结合的方法,研究稳涡器的轴向位置对旋风分离器气固两相流动特性和分离性能的影响,探讨稳涡器抑制颗粒返混逃逸机制的形成。结果表明:稳涡器的设置降低轴线附近气流的轴向速度,加深气流的滞流程度,抑制颗粒的返混和逃逸,强化返混颗粒的二次分离作用,提高颗粒的分离效率;稳涡器轴向位置较高时,排尘口截面的通流面积小,下行气流阻力大,运行压降大;当稳涡器顶部与排尘口等高时,轴线附近的轴向速度降幅最大,返混逃逸颗粒数量减少25%~50%,分离效率最高。
In order to improve the separation efficiency of cyclone separator,the influence of axial position of vortex stabilizer on the gas-solid two-phase flow characteristics and separation performance of cyclone separator was studied by experiments and CFD numerical simulation.The formation of the mechanism of vortex stabilizer to inhibit the backmixing and escape of particles was discussed.The results show that the setting of vortex stabilizer reduces the axial velocity of airflow near axis,deepens the stagnation degree of airflow,restrains the backmixing and escape of particles,strengthens the secondary separation effect of backmixing particles and improves the separation efficiency of particles.When the axial position of the vortex stabilizer is high,the flow area of the dust outlet section is small,the downward flow resistance is large and the operating pressure drop is large.When the top of vortex stabilizer is equal to the height of dust outlet,the axial velocity near the axis decreases the most,the number of backmixing escaping particles decreases by 25%~50%and the separation efficiency is the highest.
作者
王佳音
徐国
赵泽华
张荣华
杨景轩
郝晓刚
WANG Jiayin;XU Guo;ZHAO Zehua;ZHANG Ronghua;YANG Jingxuan;HAO Xiaogang(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Yingkou Qingying Petroleum Chemical Equipment Co.,Ltd.,Yingkou 115004,China)
出处
《中国粉体技术》
CAS
CSCD
2021年第4期104-112,共9页
China Powder Science and Technology
基金
国家自然科学基金项目,编号:U1710101,21506139。
关键词
旋风分离器
稳涡器
轴向位置
滞流程度
分离效率
cyclone separator
vortex stabilizer
axial position
degree of stagnant flow
separation efficiency
