三维上流式反应器床层流动和返混特性

doi:10.11949/j.issn.0438-1157.20171270

化工学报 ›› 2018, Vol. 69 ›› Issue (1): 381-388.DOI: 10.11949/j.issn.0438-1157.20171270

三维上流式反应器床层流动和返混特性

王威杰^1,2, 雍玉梅¹, 杨超^1,2, 于康^1,2

1 中国科学院过程工程研究所, 中国科学院绿色过程与工程重点实验室, 北京 100190;
2 中国科学院大学, 北京 100049

收稿日期:2017-09-19 修回日期:2017-11-27 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: 雍玉梅
基金资助:
国家重点研发计划重点专项（2016YFB0301701）；国家自然科学基金项目（21776283）；中国科学院前沿科学重点研究项目（QYZDJ-SSW-JSC030）。

Flow and back-mixing characteristics in three dimensional up-flow reactor

WANG Weijie^1,2, YONG Yumei¹, YANG Chao^1,2, YU Kang^1,2

1 CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2017-09-19 Revised:2017-11-27 Online:2018-01-05 Published:2018-01-05
Contact: 10.11949/j.issn.0438-1157.20171270
Supported by:
supported by the National Key Research and Development Program (2016YFB0301701), the National Natural Science Foundation of China (21776283) and the Key Research Program of Frontier Sciences, CAS(QYZDJ-SSW-JSC030).

摘要/Abstract

摘要：

采用内径为280 mm的上流式反应器，以空气模拟气相、甘油和水混合溶液模拟渣油。用3种不同粒径的氧化铝球形工业催化剂颗粒为填充颗粒，考察了不同模拟物系的颗粒粒径、颗粒密度、液相黏度、不同床层的高径比和不同操作条件对上流式反应器内床层压降及其波动、床层轴向返混的影响规律。得到模拟工业运行物系和操作条件的上流式反应器床层总压降关联式，相对误差在12%以内。床层总压降均随床层高径比、颗粒密度和液相黏度增加而增大，但随颗粒粒径的增大而减小，床层压降波动随表观气速增加而增大。填充颗粒粒径越小、颗粒密度越小、高径比越大，床层内轴向返混越严重；床层内压降和轴向返混均随表观气速的增加而增大。

关键词: 上流式反应器, 流动, 返混特性, 多相流反应器, 传递过程

Abstract:

Using an up-flow reactor with inner diameter of 280 mm, the industrial gas phase with air and the residual oil with the mixture of glycerol and water are simulated. The effects of particle size, particle density, liquid viscosity and the ratio of bed height to diameter under different operating conditions on the total bed pressure drop and its fluctuation, and the axial back-mixing were investigated in an up-flow reactor packed by alumina spherical catalyst particles. A correlation of pressure drop is obtained with the relative error below 12% which is suitable for gas-liquid-solid systems simulated industrial operating system and operating conditions in an up-flow reactor. The total pressure drop decreases with the increase of particle size, the ratio of height to diameter, particle density and liquid viscosity. The pressure fluctuation becomes stronger when the superficial gas velocity increases. The axial back-mixing in the reactor packed by smaller size and smaller density particles with the larger ratio of height to diameter is more serious. Both bed pressure drop and axial back-mixing increase with the increasing superficial gas velocity.

Key words: up-flow reactor, flow, back-mixing characteristics, multiphase reactor, transport processes

中图分类号:

TQ021.4

王威杰, 雍玉梅, 杨超, 于康. 三维上流式反应器床层流动和返混特性[J]. 化工学报, 2018, 69(1): 381-388.

WANG Weijie, YONG Yumei, YANG Chao, YU Kang. Flow and back-mixing characteristics in three dimensional up-flow reactor[J]. CIESC Journal, 2018, 69(1): 381-388.

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三维上流式反应器床层流动和返混特性

Flow and back-mixing characteristics in three dimensional up-flow reactor

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