Gas and solid flow patterns in a loop-seal operated as solid re-injection device between the downcomer and the riser of a lab-scale cold CFB apparatus were characterized under a broad range of operating conditions by a combination of methods, including measurement of pressure time series along the CFB loop, solid mass flux along the riser and solids and gas tracing into the loop-seal. Analysis of results from solids and gas tracing tests highlights the role of both solid downflow in the supply chamber and gas cross-flow between the loop-seal chambers on the fluidization patterns. An approximate criterion is given for the onset of gas "leakage" between the two loop-seal sections, relevant to loop-seal applications in dual interconnected fluidized beds (DIFB). (C) 2014 Elsevier B.V. All rights reserved.

Gas and solid flow patterns in the loop-seal of a circulating fluidized bed

Solimene Roberto;Chirone Riccardo;
2014

Abstract

Gas and solid flow patterns in a loop-seal operated as solid re-injection device between the downcomer and the riser of a lab-scale cold CFB apparatus were characterized under a broad range of operating conditions by a combination of methods, including measurement of pressure time series along the CFB loop, solid mass flux along the riser and solids and gas tracing into the loop-seal. Analysis of results from solids and gas tracing tests highlights the role of both solid downflow in the supply chamber and gas cross-flow between the loop-seal chambers on the fluidization patterns. An approximate criterion is given for the onset of gas "leakage" between the two loop-seal sections, relevant to loop-seal applications in dual interconnected fluidized beds (DIFB). (C) 2014 Elsevier B.V. All rights reserved.
2014
Istituto di Ricerche sulla Combustione - IRC - Sede Napoli
Istituto di Scienze e Tecnologie per l'Energia e la Mobilità Sostenibili - STEMS
Circulating fluidized bed
Loop seal
Non-mechanical valve
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/260638
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