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喷嘴进料对催化裂化提升管流动行为的影响

孙国刚; 时铭显   

  1. Department of Chemical Engineering, University of Petroleum, Beijing,102249, China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2003-12-28 发布日期:2003-12-28
  • 通讯作者: 孙国刚

Influence of Feed Injection on Hydrodynamic Behavior in FCC Riser

SUN Guogang; SHI Mingxian   

  1. Department of Chemical Engineering, University of Petroleum, Beijing,102249, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-12-28 Published:2003-12-28
  • Contact: SUN Guogang

摘要: This paper studies the influence of feed injection on the hydrodynamic behavior of fluid
catalytic cracking riser reactors. Experiments were conducted in a cold model of 186 mm ID
with two oppositely inclined secondary air feed nozzles. The flow structure was determined
by means of the axial static pressure measurements and local radial optic fiber probe
measurements on different levels with emphasis on the sections downstream of the secondary
injection. The measurements reveal that the secondary injection plays a crucial role on
riser hydrodynamics. Just above the secondary injection, the flow and mixing are strongly
affected, while below the secondary injection the effect is weak. The radial profile just
downstream of secondary injection demonstrates wavy features. The effective region of
secondary injection could be estimated by the axial pressure gradient profiles and/or the
radial profiles of local solids velocity and density.

关键词: fluid catalytic cracking;riser reactor;feed injection region;flow structure

Abstract: This paper studies the influence of feed injection on the hydrodynamic behavior of fluid
catalytic cracking riser reactors. Experiments were conducted in a cold model of 186 mm ID
with two oppositely inclined secondary air feed nozzles. The flow structure was determined
by means of the axial static pressure measurements and local radial optic fiber probe
measurements on different levels with emphasis on the sections downstream of the secondary
injection. The measurements reveal that the secondary injection plays a crucial role on
riser hydrodynamics. Just above the secondary injection, the flow and mixing are strongly
affected, while below the secondary injection the effect is weak. The radial profile just
downstream of secondary injection demonstrates wavy features. The effective region of
secondary injection could be estimated by the axial pressure gradient profiles and/or the
radial profiles of local solids velocity and density.

Key words: fluid catalytic cracking, riser reactor, feed injection region, flow structure