학술논문
Measurement of External-Solids Circulation Flux in a Circulating Fluidized Bed by Electrical Capacitance Tomography and Microwave Doppler Radar
Document Type
Conference
Author
Source
2018 IEEE International Conference on Imaging Systems and Techniques (IST) Imaging Systems and Techniques (IST), 2018 IEEE International Conference on. :1-5 Oct, 2018
Subject
Language
Abstract
In a gas-solids circulating fluidized bed (CFB), the external-solids circulating flux (G s ) has important effect on the mass and heat transfer inside the CFB system. To improve the process operation efficiency and reduce the emission of pollution, it is important to accurately measure G s . In this paper, the authors proposed a new approach to measuring G s using electrical capacitance tomography (ECT) and microwave Doppler radar (MDR) velocity meter based on a lab-scale CFB system with multi-cyclone separators. The ECT sensor is used to get the solids volume fraction in the cross section of the standpipe and MDR is used to measure the averaged solids velocity along the standpipes. Based on those two values, G s can be addressed. Meanwhile, computation particle fluid dynamic (CPFD) is used to investigated the gas-solids flow hydrodynamic characteristics and verified the measurement results.