摘要
为了提高旋风分离器的防磨减阻性能,运用计算流体动力学方法研究了常规和防磨减阻旋风分离器的防磨减阻机理。结果表明:常规旋风分离器容易发生严重的局部冲蚀,而防磨减阻旋风分离器冲蚀磨损区域较为均匀。在同一粒径下,防磨减阻旋风分离器的壁面冲蚀磨损远小于常规旋风分离器。两者的壁面冲蚀磨损速率随粒径增大而逐渐增大,当粒径大于15μm时,冲蚀磨损速率变化不大。两者的压降损失随着入口速度的增加而增大,当入口速度为15 m/s时,防磨减阻旋风分离器的压降为297 Pa远小于常规旋风分离器的821 Pa。防磨减阻板不会改变旋风分离器的流场特性,分离小粒径颗粒效率略小于常规旋风分离器,但粒径大于5μm时,防磨减阻旋风分离器具有很高的分离效率。
In order to improve the performance of the cyclone wear drag, computational fluid dynamics method was used to study the wear and drag reduction mechanism of the normal cyclone and the wear resistance reduction one. The results show that conventional cyclone prones to severe local erosion, and wear drag cyclone area is more evenly. Under the same particle size, the erosion of wear drag cyclone is far less than that of the conventional one. The wall erosion rate of both increases with particle size and goes up gradually, and when the particle size is greater than 15 μm, erosion rate changes little; the pressure drop loss of both increases with the increase of inlet velocity, when the inlet velocity of 15 m/s, the pressure drop of wear drag cyclone is 297 Pa ,which is far less than 821 Pa of the conventional one. Wear drag board does not change the flow characteristics of the cyclone, the separation efficiency of small particle size is slightly smaller than that of the conventional cyclone, but when the particle size is greater than 5 μm, wear drag cyclone separator is with high efficiency.
出处
《化学工程》
CAS
CSCD
北大核心
2015年第9期30-35,62,共7页
Chemical Engineering(China)
基金
石油天然气装备教育部重点实验室开放基金资助项目(OGE201403-28)
西南石油大学机电工程学院2014年研究生创新基金资助项目(CX2014SY23)
关键词
旋风分离器
气固二相流
冲蚀磨损
减阻
数值模拟
cyclone separator
gas-solid two-phase flow
erosion wear
drag reduction
numerical simulation
