Influence of Heating Rate on Destruction of Coke Plate of Electrolyzer Under Cyclic Temperature Shock

In this study, a three-dimensional finite element analysis is performed to investigate the stress-strain state and failure of the anode block of a medium-temperature fluoride electrolyzer under cyclic high-intensity thermal loading, considering variations in the heating and cooling rates. It is assumed that the porosity within the coke plate is distributed in a random fashion. The modeling is conducted within the framework of a phenomenological approach in the mechanics of deformable solids. The behavior of the metallic elements of the anode block is described as an elastic-plastic medium, with the failure criterion based on the critical value of plastic strain intensity. The coke plate is modeled as an elastic-brittle medium, and its failure is described using a tensorial polynomial criterion that accounts for the differences in the coke strength values under compression and tension. The numerical simulations are performed using the EFES 2.0 proprietary software package. The influence of the heating rate of the anode block on the failure of the coke plate is investigated.