石油学报(石油加工) ›› 2018, Vol. 34 ›› Issue (4): 733-738.doi: 10.3969/j.issn.1001-8719.2018.04.012

• 研究报告 • 上一篇    下一篇

18 m循环流化床提升管内压力信号的功率谱密度分析(流态化约稿)

裴华健,王成秀,蓝兴英,高金森,徐春明   

  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:2017-10-19 修回日期:2018-02-09 出版日期:2018-07-25 发布日期:2018-09-26
  • 通讯作者: 王成秀,女,副教授,博士,从事颗粒及流态化技术研究;E-mail:cwang1277@cup.edu.cn E-mail:jsgao@cup.edu.cn
  • 作者简介:第一作者:裴华健,男,硕士研究生,从事化学工程及技术研究
  • 基金资助:
    国家自然科学基金会重点项目(91534204);国家自然科学基金青年基金项目(21506253); 中国石油大学(北京)科研基金项目(246214YJRC018)资助

Power Spectral Density Analysis of Pressure Signal in an 18 m Circulation Fluidized Bed Riser 

PEI Huajian, WANG Chengxiu, LAN Xingying, GAO Jinsen, XU Chunming   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
  • Received:2017-10-19 Revised:2018-02-09 Online:2018-07-25 Published:2018-09-26

摘要: 本研究以高度18 m,直径为80 mm的提升管反应器为研究对象,基于装置稳定运行状态下提升管不同轴向位置的压力数据,应用功率谱密度方法分析了其内部的气固流动特征。研究结果表明,功率谱密度呈现低频高能的现象,提升管内的压力信号波动主要受气固间相互作用包括气固相互摩擦、颗粒间碰撞、聚并等行为的控制,随着颗粒循环速率的增大,提升管内颗粒行为发生频次升高,压力波动程度增强。随着提升管轴向位置的升高,压力信号波动程度逐渐减弱,其中在提升管顶部区域功率谱的低频高能现象基本消失,说明在提升管底部区域气固间的相互作用较强,引起压力波动程度较大,而充分发展区域内的气固间相互作用处于稳定状态,压力波动较弱。

关键词: 循环流化床提升管, 压力信号, 功率谱密度, 气-固相互作用

Abstract: Zirconium incorporated MCM48 mesoporous materials were synthesized by hydrothermal method. And the HZrMCM48 catalyst was prepared by ion exchanging method. The sample was characterized by various methods including Xray diffraction, transmission electron microscope, N2 adsorptiondesorption, and catalytically evaluated by nheptane isomerization. These results reveal that the synthesized ZrMCM48 and HZrMCM48 still maintain a cubic ordered mesoporous structure. The acidity and stability of the HZrMCM48 catalyst is also enhanced. HZrMCM48 exhibits excellent catalytic performance in nheptane isomerization. Under the same reaction conditions, compared with ZrMCM48, the conversion and the selectivity in HZrMCM48 system are 446% and 945%, respectively, with molar ratio of Zr to Si of 002, the reaction temperature of 260℃ and the reaction time of 130 min. The high selectivity of multibranched iheptane products indicates that the synthesized HZrMCM48 catalyst has good application potential in alkane isomerization.

Key words: circulating fluidized bed riser, pressure signal, power spectral density, gas-solids interaction

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