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过程工程学报 ›› 2020, Vol. 20 ›› Issue (1): 35-43.DOI: 10.12034/j.issn.1009-606X.219184

• 流动与传递 • 上一篇    下一篇

气固并流式轴向移动床过滤器的压降特性

吕 涵1， 范怡平1*， 赵亚飞1， 卢春喜2   

  1. 1. 中国石油大学(北京)机械与储运工程学院，北京 102249 2. 中国石油大学(北京)化学工程与环境学院，北京 102249
  • 收稿日期:2019-04-19 修回日期:2019-05-14 出版日期:2020-01-22 发布日期:2020-01-14
  • 通讯作者: 范怡平 fanyipin@yahoo.com
  • 基金资助:
    石油化工联合基金

Pressure drop of gas-solid parallel flow in an axial moving bed filter

Han LÜ1, Yiping FAN1*, Yafei ZHAO1， Chunxi LU2   

  1. 1. College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China 2. College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
  • Received:2019-04-19 Revised:2019-05-14 Online:2020-01-22 Published:2020-01-14

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摘要： 通过冷模实验，改变移动床表观气速、颗粒循环速率、入口气体含尘浓度等操作参数，研究了轴向移动床过滤器的压降特性和合适的操作条件，结合移动床内气固两相运动特点，修正了Ergun公式，在加尘条件下分析了床内滤饼对压降稳定性的影响。结果表明，在无尘负荷条件下(“纯”移动床操作)，颗粒的循环速率由0增至2.26 kg/(m2?s)时，设备的压降减小0.03 kPa。表观气速为0.126 m/s、入口气体含尘浓度为89.10 g/m3时，移动床内滤饼形成和破损呈动态平衡，过滤500 s后，压降可稳定在0.88 kPa，此时设备具有较高的除尘性能，粉尘捕集效率可达96%以上。

关键词: 移动床, 过滤器, 操作压降, 滤饼

Abstract: The pressure drop characteristics of an axial moving bed were investigated by varying the operating parameters including the superficial activation energy gas velocity, the particle circulation rate and the dust concentration in the inlet gas. The results showed that when the circulation rate of particles increased from 0 to 2.26 kg/(m2?s), the pressure drop of the equipment decreased slightly by 0.03 kPa. Besides, the influence of press cake in bed on the stability of pressure drop was studied under the operating condition of dust load. When the dust concentration in the inlet was low, the dust deposited in the moving bed could not form a stable filter cake structure, and the pressure drop fluctuation of the equipment was considerable. When the inlet gas dust concentration increased to 89.10 g/m3, the formation of filter cake in the moving bed tended to be stable, and the pressure drop operation of the equipment gradually became stable. Under dust load condition, when the equipment was in the fixed bed operation state, the static pressure drop increased rapidly with filtration, and increased with the increase of the dust concentration in the inlet gas, and the pressure drop increased faster. In addition, the pressure drop of the equipment reached a stable state around 500 s, at which time the pressure drop increased by about 0.10?0.14 kPa, and the fluctuation amplitude of the pressure drop after 500 s gradually decreased with the increase of dust concentration. Furthermore, when the superficial activation energy gas velocity was 0.126 m/s and the dust concentration was 89.10 g/m3, the process of press cake forming and damaging present a dynamic balance. After filtering for 500 s, the pressure drop stabled at 0.88 kPa. At the same time, the equipment had a high dust removal performance, and the dust collection efficiency of the equipment was more than 96%.

Key words: Moving Bed, Filter, Pressure drop, Press cake