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Study on flow characteristics and phase holdup in a slurry bubble column coupled with mild agitation Author links open overlay panel

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Particuology 2024年第8期91卷 226-234页

作者： Qingyuan An Jiantao Li Lei Zhang Nailiang Wang Pengfei Zhang Zhenghong Luo Chunxi Lu State Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering Ningxia UniversityYinchuan750021China State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of Petroleum BeijingBeijing102249China Department of Chemical&Biological Engineering Monash UniversityVictoria3800Australia

A pilot-scale experimental setup was constructed to investigate the effect of mild agitation on the bubble characteristics and phase holdup in a slurry bubble *** agitation positively impacts the axial uniform distribution of solid holdup,though it shows insignificant influence on the radial *** homogenous regime,mild agitation promotes the coalescence of bubbles,and the effect becomes stronger with increasing agitator *** mild agitation contributes to a decrease in bubble size in heterogeneous flow *** agitation presents a significant effect on the gas holdup by adjusting the bubble size and bubble motion *** modification was introduced to predict the gas holdup considering the effects of mild agitation,a necessary consideration for applications requiring mild *** adapted model predicts gas holdup with a maximum error of 12.9%.

关键词： Slurry bubble column Mild agitation phase holdup Bubble characteristics

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Some hydrodynamic aspects of 3-phase inverse fluidized bed

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China Particuology 2007年第5期5卷 351-356页

作者： Krishna S.V.S.R. Bandaru D.V.S. Murthy K. Krishnaiah Department of Chemical Engineering Indian Institute of Technology Madras

Hydrodynamics of 3-phase inverse fluidized bed is studied experimentally using low density particles for different liquid and gas velocities. The hydrodynamic characteristics studied include pressure drop, minimum liquid and gas fluidization velocities and phase holdups. The minimum liquid fluidization velocity determined using the bed pressure gradient, decreases with increase in gas velocity. The axial profiles of phase holdups shows that the liquid holdup increases along the bed height, whereas the solid holdup decreases down the bed. However, the gas holdup is almost uniform in the bed.

关键词： Inverse fluidization Inverse fluidized bed Hydrodynamics phase holdup Axial holdup

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New measurements on hydrodynamics in a gas-liquid-solid expanded bed

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Particuology 2021年第5期19卷 276-284页

作者： Xiuhong Zhou Yongli Ma Mingyan Liu Yixian Zhu Jiaming Zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China State Key Laboratory of Chemical Engineering Tianjin UniversityTianjin 300350China China Energy Longyuan Environmental Protection Co. Ltd.Beijing 100039China

The solid holdup,in a 150 mm-ID×2460 mm-height gas-liquid-solid expanded bed with air,water and glass beads(the diameter of particles is 0.6-0.8 mm)was firstly investigated based on the immersion-type online multiphase measuring instrument,and bubble behavior was studied via the BVW-2 double electrical conductivity *** effect of the superficial gas velocity and liquid velocity on the expanded ratio,the transition ratio,the bubble rising velocity,the gas holdup and the solid holdup was *** is discovered that compared with the gas velocity,the liquid velocity has stronger impact on the expanded ratio,but it is opposite for the transition *** average gas holdup and solid holdup increase linearly as the superficial gas velocity goes *** it,the gas holdup increases greater in the center,while the solid holdup increases greater near the *** with it,when the superficial liquid velocity rises,the average gas holdup hardly changes,but the average solid holdup keeps decreasing,especially the solid holdup distributes flatter with the increase of the superficial liquid velocity.

关键词： phase holdup Gas-liquid-solid expanded bed Immersion-type online multiphase measuring instrument BVW-2 double electrical conductivity probe

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A method and device for online magnetic resonance multiphase flow detection

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Petroleum Exploration and Development 2020年第4期47卷 855-866页

作者： DENG Feng XIONG Chunming CHEN Shiwen CHEN Guanhong WANG Mengying LIU Huabing ZHANG Jianjun LEI Qun CAO Gang XU Dongping TAO Ye XIAO Lizhi PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China Beijing Limecho Technology Co. LtdBeijing 100089China China University of Petroleum Beijing 102249China Institute of Computing Technology China Academy of Railway Sciences Corporation LimitedBeijing 100081China

Most multiphase flow separation detection methods used commonly in oilfields are low in efficiency and accuracy,and have data *** online multiphase flow detection method is proposed based on magnetic resonance technology,and its supporting device has been made and tested in lab and *** detection technology works in two parts:measure phase holdup in static state and measure flow rate in flowing ***-water ratio is first measured and then gas *** device is composed of a segmented magnet structure and a dual antenna structure for measuring flowing fluid.A highly compact magnetic resonance spectrometer system and intelligent software are *** experiments and field application show that the online detection system has the following merits:it can measure flow rate and phase holdup only based on magnetic resonance technology;it can detect in-place transient fluid production at high frequency and thus monitor transient fluid production in real time;it can detect oil,gas and water in a full range at high precision,the detection isn’t affected by salinity and *** is a green,safe and energy-saving system.

关键词： multiphase flow magnetic resonance(MR) flow rate phase holdup detection method detection device

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