Investigation of the gas-solid flows in a circulating fludisied bed with multi-cyclone separators by electrical capacitance tomography

Author

Haigang Wang ; Guizhi Qiu ; Wuqiang Yang

Author_Institution

Inst. of Eng. Thermophys., Beijing, China

fYear

2013

fDate

22-23 Oct. 2013

Firstpage

306

Lastpage

310

Abstract

To investigate the gas-solid flows in a circulating fluidised bed with multi-cyclone separators, a circular ECT sensor and rectangular ECT sensor are designed and used to measure the solids distribution in a cross-section in the inlet and standpipe of cyclone separator respectively. The rectangular ECT sensor has 12 electrodes with two in each shorter side and four in each longer side. The circular ECT sensor has 8 electrodes. For image reconstruction, sensitivity maps have been calculated using a simulation package, Maxwell from Ansoft. Dynamics test of CFB processes with different fluidisation velocity are given both in the inlet and downwards standpipe of the cyclone. ECT test results are given and analyzed and compared with pressure measurement results.

Keywords

cyclone separators; electric sensing devices; fluidised beds; image reconstruction; mechanical engineering computing; pipes; two-phase flow; Ansoft; CFB processes; Maxwell simulation package; circular ECT sensor; circulating fluidised beds; downward standpipe; electrical capacitance tomography; fluidisation velocity; gas-solid flow; image reconstruction; inlet standpipe; multicyclone separators; pressure measurement; rectangular ECT sensor; solid distribution; Boilers; Cyclones; Electrodes; Fluidization; Image reconstruction; Particle separators; Solids; CFB; Cyclone separators; ECT; Rectangular sensor;

fLanguage

English

Publisher

ieee

Conference_Titel

Imaging Systems and Techniques (IST), 2013 IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4673-5790-6

Type

conf

DOI

10.1109/IST.2013.6729711

Filename

6729711