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Modelling and simulation of the sulphur retention in circulating fluidized bed combustors

✍ Scribed by J. Adanez; P. Gayan; L.F. de Diego

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 427 KB
Volume: 51
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(96)00200-x

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✦ Synopsis

To optimise the circulating fluidized bed coal combustion (CFBC) with sorbent addition and make predictions about the eombustor behaviour in a broad range of operating conditions it is necessary to make a mathematical model of the process. This model was developed integrating hydrodynamic and sulphation kinetic submodels. A simulation, from the point of view of sulphur retention, was made. The variables most affecting the sulphur retention were the pressure drop, the gas velocity, the Ca/S molar ratio, the efficiency of solids recovery by the cyclone and specially the sorbent reactivity and its particle size distribution through the amount of small particle sizes fed in the combustor.

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