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Application of Electrical Capacitance Tomography in the Gas and Solid Two-phase Flow Measurement of Power Plants

Author: YuZhiKun
Tutor: TianPei
School: North China Electric Power University
Course: Detection Technology and Automation
Keywords: Two-phase flow Capacitance Tomography Improved semi- iterative algorithm Wavelet Transform Image Fusion
CLC: TM621
Type: Master's thesis
Year: 2011
Downloads: 64
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Abstract


In order to meet the needs of the production process of the thermal power plant , to achieve security , economic , reasonable burning power plants lose powder pipeline gas-solid flow detection has become an important research topic . Capacitance tomography technology, with its non-intrusive , simple structure , low cost , good security , easy to implement , studied a wide range of two-phase flow detection technology ; However , in practical applications due to the system 's own \\In order to improve the the ECT system 's accuracy real-time , in recent years there have been many image reconstruction algorithm , but are not at the same time real-time to ensure the accuracy of the imaging system . To solve the above problem , the 12 electrode capacitance tomography system as the research object of detailed study and simulation from two directions : ( 1 ) proposed a new image reconstruction algorithm that improved semi- iteration algorithm . The simulation results show that the algorithm not only retains the the Landweber iteration Law imaging high precision , while to overcome the shortcomings of the system due to the slow convergence and semi- convergence result in poor real-time . Comparative analysis with traditional LBP algorithm and the same period of the LT composite algorithm , improved semi- iterative algorithm to some extent , while improving the accuracy of the electrical capacitance tomography system with real-time , with the actual value . (2) reference to electrical capacitance tomography system based on wavelet transform image fusion technology . The results show that : the image fusion technology is applied to the ECT system so that the system is similar iterative method reconstructed image in a single step by image reconstruction of the faster imaging LBP algorithm pre - iterative algorithm fusion accuracy , provides a new way for the study of electrical capacitance tomography system .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Power plant > Thermal power plants, thermal power stations
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