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The Combustion Characteristics of Spouted Beds by H.A. Arbib; R.F. Sawyer; F.J. Weinberg is a Engineering article available to read on EtoBox.

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The behaviour of spouted beds as combustors was studied to determine the interaction between bed fluid mechanics and the combustion process. A cylindrical geometry, particles in the 0.5-2 mm range, and methane/air reactants were employed. Combustion reduces the entrance jet velocity at which a spout can be maintained, and increases particle circulation rate, pressure drop and spout height in comparison with operation at identical conditions without combustion. It is shown that events in the spout determine flame stability. Measurement of bed temperatures reveal that the particle temperature remains nearly uniform and an approximate theoretical analysis of heat transfer in the bed suggests that particle-gas contact times are inadequate to allow these two phases to attain thermal equilibrium. This restricts lean stability limits, in the present system, to approximately 2/3 of the normal flammability limit, as compared with the 1/2 which would be the minimum possible if the particle temperature were to reach the exit gas temperature. Various methods of improving particle-gas heat transfer are considered and the thermal disequilibrium in the spout is shown to be greatly decreased. Lean

Who reads The Combustion Characteristics of Spouted Beds?

Author

H.A. Arbib; R.F. Sawyer; F.J. Weinberg

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd; Elsevier BV (ISSN 1540-7489)

Published

1981

Language

EN

Field

Engineering (Physical Sciences)