减阻装置对预热器旋风筒工作性能的优化  

Optimization of working performance of preheater cyclone by drag reduction device

作　　者：刘文欢[1] 刘宇[1] 万永峰 雷繁 徐品晶[1] LIU Wenhuan;LIU Yu;WAN Yongfeng;LEI Fan;XU Pinjing(College of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055

出　　处：《中国粉体技术》2023年第4期71-79,共9页China Powder Science and Technology

基　　金：国家重点研发计划项目,编号:2021YFB3802003、2021YFB3802000。

摘　　要：预热器旋风筒的高分离效率伴随着较大的压力损失,随着国家节能减排、超净排放政策的实施,如何保证较大幅度减小预热器旋风筒压力损失的同时不降低或者小幅降低其分离效率,达到节能降耗的目的,是目前行业研究的重点。为了实现预热器旋风筒的低压力损失及高分离效率,设计开发2种降低压力损失的装置;在不改变预热器旋风筒结构参数的前提下,研究不同类型降阻装置在不同入口风速、不同固气比下对压力损失和分离效率的影响,确定减阻器适用的工况。结果表明:对于相同结构参数的预热器旋风筒,内筒减阻器对压力损失的最大减阻率为21.34%,平均降低率为13.91%,对分离效率降低率为5%左右,适用于较低的入口风速或者高风速下较低固气比时的工况;引流减阻器在实验范围内具有良好的减阻效果,对压力损失的最大减阻率为54.40%,平均降低率达到35.23%,对分离效率降低率为7%,适用于对分离效率要求不太高,需要压力损失降低幅度较大的工况。The high separation efficiency of preheater cyclone is accompanied by large large pressure loss.With the implomenta-tion of the national policy of energy saving,emission reduction and ultra-clean emission,how to ensure that the pressure loss of preheater cyclone is greatly reduced without reducing or slightl reducing its separation efficiency,so as to achieve the purpose of energy saving and consumption reduction,is the focus of current industry research.In order to achieve the performance index of low resistance loss and high separation efficiency of preheater cyclone,two pressure loss reduction devices were designed and developed.Without changing the structural parameters of the preheater cyclone,this paper studied the effects of different types of drag reduction devices on pressure loss and separation efficiency under dfferent inlet air velocities and different solid-gas ratios,determined the applicable working conditions of drag reduction devices.The results show that for the preheater cyclone with the same structural parameters,the maximum reduction rate of pressure loss by inner cylinder reduction device is 21.34%,the aver-age reduction rate is 13.91%,and the reduction rate of separation efficiency is about 5%,which is applicable to the working conditions at lower inlet air speed or lower solid to gas ratio at high air speed.The diversion reduction device has good reduction effect within the test range,the maximum reduction rate of pressure loss reaches 21.34%,the average reduction rate of pressure loss reaches 35.23%,but the reduction rate of separation efficiency is 7%,which is suitable for the working conditions where the requirement of separation efficiency is not too high,but the pressure loss needs to be reduced significantly.

关 键 词：预热器旋风筒 减阻器 压力损失 减阻率 分离效率 

分 类 号：TQ172[化学工程—水泥工业] TB4[化学工程—硅酸盐工业]