Monitoring solid flow in a circulating fluidised bed with external heat exchanger by electrical capacitance tomography

Author

Wang, H.G. ; Qiu, G.Z. ; Zhao, G.R. ; Mou, X.Z. ; Lu, Q.G. ; Yang, W.Q.

Author_Institution

Inst. of Eng. Thermophys., Beijing, China

fYear

2012

fDate

16-17 July 2012

Firstpage

78

Lastpage

82

Abstract

Two circular electrical capacitance tomography (ECT) sensors have been designed and used to monitor the solids flow in a cold circulating fluidised bed (CFB) with an external heat exchanger (EHE). The ECT sensors have eight electrodes and were mounted in the side tube and return tube above the EHE via pneumatically controlled loop seal respectively. Dynamics test with different process conditions are given. Image reconstruction results in the cross-sectional of the two tubes are compared and averaged measured signals are given. The results indicate that the solid flow can be controlled in the EHE based on ECT measurement.

Keywords

capacitive sensors; electrodes; fluidised beds; heat exchangers; image reconstruction; ECT sensors; averaged measured signals; circular electrical capacitance tomography; cold circulating fluidised bed; dynamics test; electrodes; external heat exchanger; image reconstruction; pneumatically controlled loop seal; solid flow; Electron tubes; Fluidization; Seals; Sensors; Solids; Switches; Valves; CFB; ECT; External heat exchanger; Solid flow;

fLanguage

English

Publisher

ieee

Conference_Titel

Imaging Systems and Techniques (IST), 2012 IEEE International Conference on

Conference_Location

Manchester

Print_ISBN

978-1-4577-1776-5

Type

conf

DOI

10.1109/IST.2012.6295490

Filename

6295490