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过程工程学报 ›› 2021, Vol. 21 ›› Issue (10): 1177-1186.DOI: 10.12034/j.issn.1009-606X.220339

• 流动与传递 • 上一篇    下一篇

入口粉尘浓度对新型旋流-颗粒床耦合分离器特性的影响

付金壮, 常明, 范怡平*, 卢春喜   

  1. 中国石油大学(北京)重质油国家重点实验室,北京 102249

  • 收稿日期:2020-10-16 修回日期:2020-12-10 出版日期:2021-10-28 发布日期:2021-10-26
  • 通讯作者: 范怡平 fanyipin@yahoo.com
  • 基金资助:
    石油化工联合基金

Influence of inlet dust concentration on characteristics of a new cyclone particle bed coupling separator

Jinzhuang FU,  Ming CHANG,  Yiping FAN*,  Chunxi LU   

  1. State Key Laboratory of Heavy oil, China University of Petroleum (Beijing), Beijing 102249, China

  • Received:2020-10-16 Revised:2020-12-10 Online:2021-10-28 Published:2021-10-26

摘要: 通过大型冷模实验,考察了入口粉尘浓度对某连续操作新型旋流-颗粒床耦合分离器压降和除尘效率的影响特性。结果表明,入口粉尘浓度越大,达到平衡时分离器的压降越大,压降增速越快,入口粉尘浓度为59.13 g/m3时,分离器平衡压降最大为1.2 kPa;入口粉尘浓度越低,分离器分离效率越高。分离器颗粒床层内捕集颗粒含尘量与再生效率有关,再生尘源浓度越小,分离器压降达到平衡越快。当再生尘源浓度由58.18%降至23.67%,装置压降由1.5 kPa降至1.2 kPa;随着再生尘源浓度降低,分离器除尘效率略微下降。入口粉尘浓度和再生尘源浓度对分离器压降影响的结果一致,对分离器效率影响的结果不同。

关键词: 入口粉尘浓度, 新型耦合分离器, 压降, 分离效率

Abstract: Nowadays, the production and combustion of fossil fuels make the emission of particulate pollutants increasing day by day. Researchers are actively developing new high efficiency dust removal separator to reduce the emission of pollutants. The studies on the separation technology of single cyclone separator and single particle bed filter are extensive but on the coupling separator of cyclone separator and particle bed are scarce. Therefore, the study of the cyclone particle bed coupling separator has broad application prospect. In order to investigate the influences of the inlet dust concentration on the pressure drop and the dust removal efficiency of a new cyclone-granular bed coupling separator, a large scale cold model experiment was carried out. The results showed that with an increase of the inlet dust concentration, the pressure drop of the separator tenders large and the speed of pressure drop increased rapidly when reaching an equilibrium state. The reason is that the inlet dust concentration increases, the dust in the built-in particle bed increases, the bed porosity decreases and the pressure drop increases. With the decrease of the inlet dust concentration, the separation efficiency of the separator increased. The dust content in the particle bed of the separator was also related to the regeneration efficiency. As the concentration of the regeneration dust source decreased, the time duration of the pressure drop reaching equilibrium became short. Furthermore, based on the experimental data, the empirical formula of separator pressure drop and regeneration dust source concentration was given. When the concentration of regeneration dust source reduced from 58.18% to 23.67%, the pressure drop reduced from 1.5 kPa to 1.2 kPa. With the decrease of the concentration of the regeneration dust source, the dust removal efficiency of the separator decreased slightly. The influence of inlet dust concentration and the regeneration dust source concentration on the pressure drop of separator coincided with each other, while the effect on the separator efficiency was different.

Key words: Inlet dust concentration, new coupling separator, pressure drop, separation efficiency