Thermomechanical computation of refractory lining accounting for chemical swelling
Résumé
This paper aims to illustrate current possibility to develop fully 3D finite element simulations accounting simultaneously for thermal, mechanical and chemistry phenomena in order to give a help for the design of refractory linings. Illustration is focused on the case of SiC-based refractory lining used in Waste to Energy Plant (WTEP). A multi-physical coupled analysis is proposed to elaborate degradation roots and to build a dedicated thermo-chemo-mechanical model. This model accounts for the reactive transport of oxygen through the gases within the porosity, and for the swelling and porosity clogging up induced by SiC oxidation. Two geometries of lining tiles are modeled and a computation of one year in-service is performed. It is demonstrated that the simulations reproduce well the localization of the degradations and allow highlighting the geometry effects on the lining behavior.