Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg

›› 2008, Vol. 16 ›› Issue (4): 635-639.

Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg

孙猛¹, 刘石², 李志宏², 雷兢¹

1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China;
2. School of Energy & Power Engineering, North China Electric Power University, Beijing 102206, China

收稿日期:2007-09-24 修回日期:2008-03-04 出版日期:2008-08-28 发布日期:2008-08-28
通讯作者: SUN Meng, E-mail: sunmeng99221@163.com
基金资助:
the National Natural Science Foundation of China(60672151,60532020)

Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg

SUN Meng¹, LIU Shi², LI Zhihong², LEI Jing¹

1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China;
2. School of Energy & Power Engineering, North China Electric Power University, Beijing 102206, China

Received:2007-09-24 Revised:2008-03-04 Online:2008-08-28 Published:2008-08-28
Supported by:
the National Natural Science Foundation of China(60672151,60532020)

摘要/Abstract

摘要： Accurate solid concentration measurement plays a key role in the process industry. Measurements analyzed offline can be used to estimate process efficiencies, to identify problems in a flow, and to validate computational models. Online measurements can be used for active control. Electrical capacitance tomography (ECT) is a unique measuring technique with great potential in multiphase flow measurement. Experimental studies are carried out on a solid concentration measurement in a cyclone separator dipleg, using ECT. In this experiment eight electrodes are selected for the ECT sensor that is placed on the straight tube of the dipleg. The fluctuating characteristics according to the screw feeder and the effect of the airflow rate from the top of the cyclone are analyzed. The feasibility and reliability of the method are verified by the experimental results.

关键词: electrical capacitance tomography, concentration measurement, cyclone separator, dipleg, gas-solid two-phase flow

Abstract: Accurate solid concentration measurement plays a key role in the process industry. Measurements analyzed offline can be used to estimate process efficiencies, to identify problems in a flow, and to validate computational models. Online measurements can be used for active control. Electrical capacitance tomography (ECT) is a unique measuring technique with great potential in multiphase flow measurement. Experimental studies are carried out on a solid concentration measurement in a cyclone separator dipleg, using ECT. In this experiment eight electrodes are selected for the ECT sensor that is placed on the straight tube of the dipleg. The fluctuating characteristics according to the screw feeder and the effect of the airflow rate from the top of the cyclone are analyzed. The feasibility and reliability of the method are verified by the experimental results.

Key words: electrical capacitance tomography, concentration measurement, cyclone separator, dipleg, gas-solid two-phase flow

孙猛, 刘石, 李志宏, 雷兢. Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg[J]. , 2008, 16(4): 635-639.

SUN Meng, LIU Shi, LI Zhihong, LEI Jing. Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg[J]. , 2008, 16(4): 635-639.

参考文献

1 Tortora, P.R., Ceccio, S.L., Trujillo, S.M., O’Hern, T.J., Shollenberger, K.A., “Capacitance measurements of solid concentration in gas-solid flows”, Powder Technol., 148, 92-101(2004).
2 Barratt, I.R., Yan, Y., Byrne, B., Bradley, M.S.A., “Mass flow measurement of pneumatically conveyed solids using radiometric sensors”, Flow Meas. Instrum., 11, 223-235 (2000).
3 Yan, C.S., Zhong, J., Liao, Y.B., Lai, S.R., Zhang, M., Gao, D.W., “Design of an applied optical fiber process tomography system”, Sensors and Actuators B, 104, 324-331 (2005).
4 Zheng, Y.N., Liu, Q., Li, Y., Gindy, N., “Investigation on concentration distribution and mass flow rate measurement for gravity chute conveyor by optical tomography system”, Measurement, 39, 643-654 (2006).
5 Ozawa, M., Umekawa, H., Furui, S., Hayashi, K., Takenaka, N., “Quantitative flow visualization of fluidized-bed heat exchanger by neutron radiography”, Applied Radiation and Isotopes, 61, 715-724 (2004).
6 Ellis, N., Briens, L.A., Grace, J.R., Bi, H.T., Lim, C.J., “Characterization of dynamic behavior in gas–solid turbulent fluidized bed using chaos and wavelet analyses”, Chem. Eng. J., 96, 105-116 (2003).
7 Warsito, W., Ohkawa, M., Kawata, N., Uchida, S., “Cross-sectional distributions of gas and solid holdups in slurry bubble column investigated by ultrasonic computed tomography”, Chem. Eng. Sci., 54,4711-4728 (1999).
8 Hosseini, S.A., Shamsai, A., Ataie-Ashtiani, B., “Synchronous measurements of the velocity and concentration in low density turbidity currents using an acoustic doppler velocimeter”, Flow Meas. Instrum., 17, 59-68 (2006).
9 Tapp, H.S., Peyton, A.J., Kemsley, E.K., Wilson, R.H., “Chemical engineering applications of electrical process tomography”, Sensors and Actuators B, 92, 17-24 (2003).
10 Tortora, P.R., Ceccio, S.L., O’Hern, T.J., Trujillo, S.M., Torczynski, J.R., “Quantitative measurement of solids distribution in gas-solid riser flows using electrical impedance tomography and gamma densitometry tomography”, Int. J. Multiphase Flow, 32, 972-995 (2006).
11 Ma, Y.X., Zheng, Z.C., Xu, L.A., Liu, X.P., Wu, Y.X., “Application of electrical resistance tomography system to monitor gas/liquid two-phase flow in a horizontal pipe”, Flow Meas. Instrum., 12,259-265 (2001).
12 Wang, M., Dorward, A., Vlaev, D., Mann, R., “Measurements of gas-liquid mixing in a stirred vessel using electrical resistance tomography (ERT)”, Chem. Eng. J., 77, 93-98 (2000).
13 Jin, H.B., Wang, M., Williams, R.A., “The effect of sparger geometry on gas bubble flow behaviors using electrical resistance tomography”, Chin. J. Chem. Eng., 14 (1), 127-131 (2006).
14 Ostrowski, K.L., Luke, S.P., Bennett, M.A., Williams, R.A., “Application of capacitance electrical tomography for on-line and off-line analysis of flow pattern in horizontal pipeline of pneumatic conveyer”, Chem. Eng. J., 77, 41-50 (2000).
15 Niu, G., Jia, Z.H., Wang, J., “Void fraction measurement in oil-gas transportation pipeline using and improved electrical capacitance tomography system”, Chin. J. Chem. Eng., 12 (4), 476-481 (2004).
16 Wang, W.W., “Voidage measurement of gas-oil two-phase flow”, Chin. J. Chem. Eng., 15 (3), 339-344 (2007).
17 Warsito, W., Fan, L.S., “Measurement of real-time flow structures in gas-liquid and gas-liquid-solid flow systems using electrical capacitance tomography (ECT)”, Chem. Eng. Sci., 56, 6455-6462 (2001).
18 Yang, W.Q., Chondronasios, A., Nattrass, S., Nguyen, V.T., Betting, M., Ismail, I., McCann, H., “Adaptive calibration of a capacitance tomography system for imaging water droplet distribution”, Flow Meas. Instrum., 15, 249-258 (2004).
19 Chaplin, G., Pugsley, T., “Application of electrical capacitance tomography to the fluidized bed drying of pharmaceutical granule”, Chem. Eng. Sci, 60, 7022-7033 (2005).
20 Jeanmeure, L.F.C., Dyakowski, T., Zimmerman, W.J., Clark, W., “Direct flow-pattern identification using electrical capacitance tomography”, Experimental Thermal and Fluid Science, 26, 763-773 (2002).
21 Yang, W.Q., Peng, L.H., “Image reconstruction algorithms for electrical capacitance tomography”, Meas. Sci. & Technol., 14 (1), R1-R13 (2003).
22 Liu, S., Fu, L., Yang, W.Q., Wang, H.G., Jiang, F., “On-line iterative reconstruction for ECT”, In: Proceedings of the 3rd World Congress on Industrial Process Tomography, Banff, Canada (2003).
23 Liu, S., Fu, L., Yang, W.Q., Wang, H.G., Jiang F., “Prior on-line iteration for image reconstruction with electrical capacitance tomography”, Proc. Sci. Meas. Technol., 151 (3), 195-200 (2004).

[1]	Ronghua Zhang, Jingxuan Yang, Shaoxing Han, Xiaogang Hao, Guoqing Guan. Improving advantages and reducing risks in increasing cyclone height via an apex cone to grasp vortex end[J]. 中国化学工程学报, 2023, 54(2): 136-143.
[2]	Pan Zhang, Guanghui Chen, Weiwen Wang, Guodong Zhang, Huaming Wang. Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator[J]. 中国化学工程学报, 2022, 46(6): 1-10.
[3]	Xianchao Liang, Limin He, Xiaoming Luo, Qingping Li, Yuanpeng You, Yiqiu Xu. Experimental study on sand particles accumulation, migration and separation efficiency in slug catcher[J]. 中国化学工程学报, 2021, 32(4): 134-143.
[4]	Marek Wasilewski, Stanis?aw Anweiler, Maciej Masiukiewicz. Characterization of multiphase gas-solid flow and accuracy of turbulence models for lower stage cyclones used in suspension preheaters[J]. 中国化学工程学报, 2019, 27(7): 1618-1629.
[5]	Chongkun Xia, Chengli Su, Jiangtao Cao, Ping Li. Reconstruction of electrical capacitance tomography images based on fast linearized alternating direction method of multipliers for two-phase flow system[J]. Chinese Journal of Chemical Engineering, 2016, 24(5): 597-605.
[6]	王泽璞, 陈琪, 王雪瑶, 李志宏, 韩振兴. Dynamic Visualization Approach of the Multiphase Flow Using Electrical Capacitance Tomography[J]. , 2012, 20(2): 380-388.
[7]	陈夏, 胡红利, 张娟, 周屈兰. An ECT System Based on Improved RBF Network and Adaptive Wavelet Image Enhancement for Solid/Gas Two-phase Flow[J]. , 2012, 20(2): 359-367.
[8]	Krzysztof Grudzien, Zbigniew Chaniecki, Andrzej Romanowski, Maciej Niedostatkiewicz, Dominik Sankowski. ECT Image Analysis Methods for Shear Zone Measurements during Silo Discharging Process[J]. , 2012, 20(2): 337-345.
[9]	陈琪, 刘石. Flame Imaging in Meso-scale Porous Media Burner Using Electrical Capacitance Tomography[J]. , 2012, 20(2): 329-336.
[10]	吴小林, 时铭显. 旋风分离器内旋进涡核的PIV显示[J]. , 2003, 11(6): 633-637.
[11]	尚智, 杨瑞昌, FUKUDA Kenji, 钟勇, 巨泽建. 用扩散流动模型分析悬浮床内的气固两相向上流动[J]. , 2003, 11(5): 497-503.
[12]	K.Smolders, D.Geldart, J.Baeyens. 流化床中旋风下料管的物理模型[J]. , 2001, 9(4): 337-347.
[13]	周理, 刘广春, 徐越平. STUDY ON THE SCALE-UP EFFECT OF CYCLONES[J]. , 1992, 7(1): 67-74.

Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg

Application of Electrical Capacitance Tomography to the Concentration Measurement in a Cyclone Dipleg

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 13

编辑推荐

Metrics

本文评价