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过程工程学报 ›› 2015, Vol. 15 ›› Issue (5): 751-757.DOI: 10.12034/j.issn.1009-606X.215233

• 流动与传递 • 上一篇    下一篇

Reasonable Aeration Tap Setting of Burned Oil Sand Particles in Standpipe of a Fluidized Bed

王子健 曹鑫 卢春喜   

  1. 中国石油大学(北京)化工学院 中国石油大学(北京)化工学院 石油大学(北京)重质加工国家重点实验室
  • 收稿日期:2015-06-08 修回日期:2015-07-02 出版日期:2015-10-20 发布日期:2015-10-20
  • 通讯作者: 王子健

Reasonable Aeration Tap Setting of Burned Oil Sand Particles in Standpipe of a Fluidized Bed

WANG Zi-jian CAO Xin LU Chun-xi   

  1. College of Chemical Engineering, China University of Petroleum(Beijing) College of Chemical Engineering, China University of Petroleum(Beijing) State Key Laboratory of Heavy Oil, China University of Petroleum (Beijing)
  • Received:2015-06-08 Revised:2015-07-02 Online:2015-10-20 Published:2015-10-20
  • Contact: WANG Zi-jian

摘要: A large scale cold model apparatus of CFB riser reactor was established according to the method of directly fluidized coking oil sand. By changing the position of aeration orifice and amount of aeration air, the solids flux was measured and the location of sensitive aeration orifice above a butterfly valve was fixed (50 mm above the valve). At last, the amount of aeration air for allocation (1~1.5 m3/h) was known and the distance between each pair of consecutive general aeration orifices (about 3 m). And a prediction equation for estimating the relation between the amount of aeration air and the solids flux was established based on experimental data and theoretical analysis, which was Q=6.17Ws0.8529(D/Do)2(L/Lo). The prediction was in good agreement with the experimental data. By using a multi-point pressure pulsation instrument to measure the pulsation at different altitudes of the standpipe, the pressure pulsation curves at different aeration orifices under different amounts of aeration air were drawn. By Fourier transformation, it was found that there was no obvious dominant frequency when oil sand flowed through the circulation standpipe, and each frequency seemed to make equal contribution to the pressure pulsation. The periodical concentration fluctuation of the particles did not exist in the circulating standpipe, and the pulsation intensity was small.

关键词: oil sand, circulating standpipe, aeration orifice, pressure fluctuation

Abstract: A large scale cold model apparatus of CFB riser reactor was established according to the method of directly fluidized coking oil sand. By changing the position of aeration orifice and amount of aeration air, the solids flux was measured and the location of sensitive aeration orifice above a butterfly valve was fixed (50 mm above the valve). At last, the amount of aeration air for allocation (1~1.5 m3/h) was known and the distance between each pair of consecutive general aeration orifices (about 3 m). And a prediction equation for estimating the relation between the amount of aeration air and the solids flux was established based on experimental data and theoretical analysis, which was Q=6.17Ws0.8529(D/Do)2(L/Lo). The prediction was in good agreement with the experimental data. By using a multi-point pressure pulsation instrument to measure the pulsation at different altitudes of the standpipe, the pressure pulsation curves at different aeration orifices under different amounts of aeration air were drawn. By Fourier transformation, it was found that there was no obvious dominant frequency when oil sand flowed through the circulation standpipe, and each frequency seemed to make equal contribution to the pressure pulsation. The periodical concentration fluctuation of the particles did not exist in the circulating standpipe, and the pulsation intensity was small.

Key words: oil sand, circulating standpipe, aeration orifice, pressure fluctuation

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