期刊文献+

气固流化床分布板死区的声发射检测 被引量:7

Detection of Dead Zone on the Distributor of Gas-Solid Fluidized Bed Based on Acoustic Emission Measurement
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摘要 在φ250 mm 的流化床中,采用空气-聚乙烯颗粒体系和3种不同结构的气体分布板进行流化实验,通过声发射检测装置采集气体分布板下方不同位置的声信号,分别考察了3种小同结构的气体分布板上流化死区的存在情况与位置分布。实验结果表明,分布板局部的声信号平均能量可以反映对应位置的颗粒活跃程度,定义了颗粒活跃程度指数 R_i,并提出以 R_i=0.6作为流化死区存在的判据。声发射技术能有效地检测流化床分布板上的流化死区,对分布板的设计以及工业生产的故障监控都具有积极的意义。 The fluidization experiments were put forth in air-polyethylene system within a 250 mm diameter fluidized bed, using three distributors with different structures. By analyzing acoustic emission (AE) signals received beneath the distributor, the existence and location of dead zone on the distributor were investigated. It was found that the local mean energy of AE signal can represent the particle activity at the related region. The idea of particle activity index (Ri ) and the criterion to identify the dead zone are proposed. When R; 〈 0. 6, the corresponding region can be looked upon as dead zone. The experimental results indicated that AE measurement can detect dead zone on the distributor effectively, which would strongly support both the design of distributor and monitoring of industrial process.
出处 《石油化工》 EI CAS CSCD 北大核心 2008年第9期910-914,共5页 Petrochemical Technology
基金 国家自然科学基金重大项目(20490205) 国家高技术研究发展计划资助项目(2007AA04Z182)
关键词 声发射 气固流化床 分布板 死区 聚乙烯颗粒 acoustic emission gas-solid fluidized bed distributor dead zone polyethylene particle
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参考文献15

  • 1Chiba T, Terashima K, Kobayashi H. Behaviour of Bubbles in Gas-Solids Fluidized Beds : Initial Formation of Bubbles. Chem Eng Sci, 1972, 27(5) : 965 -972
  • 2Leung L S. Design of Gas Distributors and Prediction of Bubble Size in Large Gas-Solids Fluidized Beds. Powder Technol, 1972, 6 (4) : 189 - 193
  • 3Johnsson H, Johnsson F. Measurements of Local Solids Volume- Fraction in Fluidized Bed Boilers. Powder Technol, 2001, 115 (1): 13-26
  • 4Johnston P M, Zhu J, de Lasa H I, et al. Effect of Distributor Designs on the Development in Downer Reactor. AIChE J, 1999, 45(7) : 1 587 - 1 592
  • 5Zhu J X, Li G Z, Qin S Z, et al. Direct Measurements of Particle Velocities in Gas-Solids Suspension Flow Using a Novel Five-Fiber Optical Probe. Powder Technol, 2001, 115(2) : 184 - 192
  • 6Patrose B, Caram H S. Optical Fiber Probe Transit Anemometer for Particle Velocity Measurements in Fluidized Beds. AIChE J, 1982, 2,8(4) : 604 -609
  • 7王一平,刘俊杰,吴晨曦,朱丽.气液固循环流化床换热器中预分布器结构的优化[J].化工学报,2006,57(1):31-35. 被引量:8
  • 8Guymer I, Harry A. Use of Laser Induced Fluorescence and Video Imaging Techniques in an Investigation of Mixing Across the Dead Zone/Flow Zone Boundary. In : IMechE Conference Transaction. International Seminar on Optical Methods and Data Processing in Heat and Fluid Flows, London : IMechE Press, 1996. 121-127
  • 9Wu Bangyou, Yu Guang, Bellehumeur C. Dynamic Flow Behavior Measurements in Gas-Solid Fluidized Beds Using Different Non- Intrusive Techniques and Polyethylene Powder. Flow Meas Instrum, 2007, 18(5 -6) : 197-203
  • 10Rees A C, Davidson J F, Dennis J S, et al. The Nature of the Flow Just Above the Perforated Plate Distributor of a Gas-Fluidized Bed, as Imaged Using Magnetic Resonance. Chem Eng Sci,2006, 61(18):6002-6015

二级参考文献22

  • 1阳永荣,侯琳熙,王靖岱,胡晓萍.声波的多尺度分解与颗粒粒径分布的实验研究[J].自然科学进展,2005,15(3):380-384. 被引量:25
  • 2侯琳熙,王靖岱,阳永荣,胡晓萍.气固流化床中声发生机理及在工业装置中的应用[J].化工学报,2005,56(8):1474-1478. 被引量:27
  • 3王靖岱,蒋斌波,阳永荣,舒伟杰.声波的多尺度解析与气固流化床故障检测[J].化工学报,2006,57(7):1560-1564. 被引量:21
  • 4Dick G.Klaren improvements and new developments in self-cleaning heat transfer leading to new applications//2003 ECI Conference on Heat Exchanger Fouling and Cleaning Fundamentals and Applications.Berkeley:The Berkeley Electronic Press,2005:287-293.
  • 5Klaren.Apparatus for carrying out a physical and/or chemical process,such as a heat exchanger:US,5676201.1997.
  • 6YeShiren(叶施仁) YuTianlan(俞天兰) YuXiumin(俞秀民).The application and geometry optimization of liquid—solid fluidized bed exchanger[J].化工机械,1998,25(1):31-32.
  • 7JiangFeng(姜峰) JiaLiyun(贾丽云) LiuMingyan(刘明言) LiXiulun(李修伦).Distributions of particle in solid—liquid circulating bed[J].化学工程,2004,32(1):18-23.
  • 8WangYiping(王一平) ZhangJinli(张金利) LiuJunjie(刘俊杰).[P].CN,200410093926.6..
  • 9AklonisJJ MacknightWJ.聚合物粘弹性引论[M].Beijing:Science Press,1986.44.
  • 10金涌 祝京旭 汪展文 俞芷青.流化床工程原理[M].Beijing: Tsinghua University Press,2001.36.

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