[1]付飞飞,许传龙,王式民,等.基于阵列式静电传感器的密相气力输送煤粉颗粒运动特性分析[J].东南大学学报(自然科学版),2013,43(3):536-541.[doi:10.3969/j.issn.1001-0505.2013.03.017]
 Fu Feifei,Xu Chuanlong,Wang Shimin,et al.Flow characteristics of dense-phase pneumatically conveyed coal powders by electrostatic sensor arrays[J].Journal of Southeast University (Natural Science Edition),2013,43(3):536-541.[doi:10.3969/j.issn.1001-0505.2013.03.017]
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基于阵列式静电传感器的密相气力输送煤粉颗粒运动特性分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第3期
页码:
536-541
栏目:
电气工程
出版日期:
2013-05-20

文章信息/Info

Title:
Flow characteristics of dense-phase pneumatically conveyed coal powders by electrostatic sensor arrays
作者:
付飞飞1许传龙1王式民1闫勇2
1东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096; 2华北电力大学控制与计算机工程学院, 北京 102206
Author(s):
Fu Feifei1 Xu Chuanlong1 Wang Shimin1 Yan Yong2
1Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China
2School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China
关键词:
阵列式静电传感器 电容层析成像(ECT) 密相气力输送 频谱 近似熵
Keywords:
electrostatic sensor array electrical capacitance tomography(ECT) dense-phase pneumatic conveying frequency spectrum approximate entropy
分类号:
TM9
DOI:
10.3969/j.issn.1001-0505.2013.03.017
摘要:
首先运用有限元法系统分析了阵列式静电传感器灵敏度的分布特性.然后在密相气力输送实验装置上,利用阵列式静电传感器和电容层析成像(ECT)技术获得了不同表观气速(5.7, 6.9, 8.1 m/s)下的静电输出信号和管道截面的煤粉分布图像.结合ECT成像结果,利用FFT变换和近似熵方法分别得到阵列传感器输出静电信号的频谱特性和近似熵值.结果表明:随表观气速增大,输送管道内颗粒速度增大,并且稀相区颗粒径向速度波动明显;浓相区的近似熵值一直大于稀相区的近似熵值,并且随两者之差的减小,ECT成像图表明此过程煤粉分布更均匀,输送悬浮性越好.
Abstract:
The sensitivity of electrostatic sensor array is investigated by the finite element method. The experiments are performed in a dense-phase pneumatic conveying system,and electrostatic signals and coal powder distribution over the cross section of the pipeline under three different superficial gas velocities(5.7, 6.9, 8.1 m/s)are obtained, respectively, by electrostatic sensor array and electrical capacitance tomography(ECT). Combined with ECT imaging, the frequency spectrum and approximate entropy(ApEn)value of output signals of the array are analyzed by the fast Fourier transformation(FFT)method and approximate entropy method, respectively. Results show that with the increasing superficial gas velocity, the increase of the axial particles velocity is the main dynamic change, while in dilute phase region, the particles velocity fluctuation in the radial direction also can be observed. The value of the electrostatic signal in dense-phase region is greater than that in dilute phase region. When the ApEn value difference of the electrostatic signals is smaller, the pulverized coal particles are better suspended.

参考文献/References:

[1] 梁财.高压超浓相煤粉气力输送流动特性研究[D].南京:东南大学能源与环境学院,2007.
[2] 杨进, 文玉梅, 李平.基于相关分析和近似熵的管道泄漏声信号特征提取及辨识方法[J].仪器仪表学报,2009,30(2):272-278.
  Yang Jin, Wen Yumei, Li Ping.Feature extraction and identification of leak acoustic signal in water distribution pipelines using correlation analysis and approximate entropy[J].Chinese Journal of Scientific Instrument,2009,30(2):272-278.(in Chinese)
[3] 栗然, 陆凤怡, 徐宏锐, 等.基于局域波与近似熵的负荷分析方法[J].中国电机工程学报,2010,30(25):51-58.
  Li Ran, Lu Fengyi, Xu Hongrui, et al.Novel approach for load analysis based on local wave and approximate entropy[J].Proceedings of the CSEE,2010,30(25):51-58.(in Chinese)
[4] 林萍, 王晓萍, 陈伯川, 等.近似熵的性质及其在气固流化床复杂性研究中的应用[J].高校化学工程学报,2004,18(3):281-286.
  Lin Ping,Wang Xiaoping,Chen Bochuan,et al.Character of approximate entropy and its application in the complexity measurement of gas-solid fluidized bed[J].Journal of Chemical Engineering of Chinese Universities,2004,18(3):281-286.(in Chinese)
[5] Matsusaka S, Masuda H. Electrostatics of particles[J].Advanced Powder Technology,2003,14(2):169-179.
[6] Nifuku M, Katoh H. A study on the static electrification of powders during pneumatic transportation and the ignition of dust clouds[J].Powder Technology,2003, 135-136:234-242.
[7] Masuda H, Komatsu T, Mitsui N, et al.Electrification of gas-solid suspensions flowing in steel and insulating-coated pipes[J].Journal of Electrostatics,1977, 2(4):341-350.
[8] Qian Xiangchen, Yan Yong, Shao Jiaqing, et al. Quantitative characterization of pulverised coal and biomass-coal blends in pneumatic conveying pipelines using electrostatic sensor arrays and data fusion techniques[J]. Measurement Science and Technology, 2012, 23(8):1-8.
[9] Gajewski J B.Non-contact electrostatic flow probes for measuring the flow rate and charge in the two-phase gas-solid flows[J].Chemical Engineering Science,2006, 61(7):2262-2270.
[10] Gajewsk J B.Electrostatic nonintrusive method for measuring the electric charge, mass flow rate, and velocity of particulates in the two-phase gas-solid pipe flows—its only or as many as 50 years of historical evolution[J].IEEE Transactions on Industry Applications,2008, 44(5):1418-1430.
[11] Xu Chuanlong,Wang Shimin.HHT analysis of electrostatic fluctuation signals in dense-phase pneumatic conveying of pulverized coal at high pressure[J].Chemical Engineering Science,2010, 65(4):1334-1344.
[12] Xu Chuanlong,Li Jian,Wang Shimin.Investigations into sensing characteristics of electrostatic sensor arrays through computational modeling and practical experimentation[J].Journal of Electrostatics,2012, 70(1):60-71.
[13] 杨道业,周宾,王式民.电容层析成像在高压浓相煤粉气力输送中的应用[J].化工学报,2009,60(4):892-897.
  Yang Daoye,Zhou Bin,Wang Shimin.Application of electrical capacitance tomography in dense-phase pneumatic conveying of pulverized coal under high pressure[J].Journal of the Chemical Industry and Engineering Society of China, 2009, 60(4):892-897.(in Chinese)
[14] Cong Xingliang,Guo Xiaolei,Gong Xin,et al. Experimental research of flow patterns and pressure signals in horizontal dense phase pneumatic conveying of pulverized coal[J].Powder Technology, 2011, 208(3):600-609.
[15] Pincus S. Approximate entropy(ApEn)as a complexity measure[J].CHOAS,1995, 5(1):110-117.
[16] Sinclair J L, Jackson R. Gas-particle flow in a vertical pipe with particle-particle interactions[J]. AIChE Journal, 1989, 35(9):1473-1486.

备注/Memo

备注/Memo:
作者简介: 付飞飞(1985—),女,博士生;许传龙(联系人),男,博士,教授,博士生导师,chuanlongxu@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(50906012)、国家重点基础研究发展计划(973计划)资助项目(2010CB227002, 2012CB215203)、教育部新世纪优秀人才支持计划资助项目(NCET-12-0116)、高等学校学科创新引智计划资助项目(B12034).
引文格式: 付飞飞,许传龙, 王式民,等.基于阵列式静电传感器的密相气力输送煤粉颗粒运动特性分析[J].东南大学学报:自然科学版,2013,43(3):536-541. [doi:10.3969/j.issn.1001-0505.2013.03.017]
更新日期/Last Update: 2013-05-20