论文信息 - A new image reconstruction method for tomographic investigation of fluidized beds

A new image reconstruction method for tomographic investigation of fluidized beds

It is important to investigate the behavior of circulating fluidized beds (CFB) for efficient coal combustion. Electrical capacitance tomography (ECT) was applied to the measurement of gas/solids distribution in square CFBs. An iterative method was used to achieve improved image reconstruction over the commonly used linear back-projection algorithm. The solids concentration profile, temporal variation of average solids concentration, and frequency spectra, which were obtained from the ECT data, are presented.

Wuqiang Yang | Fan Jiang | Haigang Wang | Shi Liu

[1] J. S. Halow. Chapter 21 – Capacitance imaging of fluidized beds , 1995 .

[2] Wuqiang Yang,et al. An image-reconstruction algorithm based on Landweber's iteration method for electrical-capacitance tomography , 1999 .

[3] Ø. Isaksen,et al. A review of reconstruction techniques for capacitance tomography , 1996 .

[4] Wuqiang Yang,et al. Optimization of an iterative image reconstruction algorithm for electrical capacitance tomography , 1999 .

[5] O. Molerus,et al. The local structure of gas fluidized beds —I. A statistically based measuring system , 1973 .

[6] Tomasz Dyakowski,et al. On-line monitoring of dense phase flow using real time dielectric imaging 1 The authors are members , 1999 .

[7] L. Landweber. An iteration formula for Fredholm integral equations of the first kind , 1951 .

[8] Tomasz Dyakowski,et al. Application of capacitance tomography to gas-solid flows , 1997 .

[9] Filip Johnsson,et al. Bottom bed regimes in a circulating fluidized bed boiler , 1996 .

[10] Dieter Mewes,et al. Investigation of the two-phase flow in trickle-bed reactors using capacitance tomography , 1997 .

[11] Jan-Erik Nordtvedt,et al. A new reconstruction algorithm for process tomography , 1993 .

[12] Wuqiang Yang,et al. Electrical capacitance tomography with square sensor , 1999 .

[13] O. Molerus,et al. The local structure of gas fluidized beds —II. The spatial distribution of bubbles , 1973 .