Abstract
This work investigated the effectiveness and limitation of twisted slices applied in thermal cracking process. Stiff cracking kinetics was first integrated into a 3D simulation of specially configured cracking tube with twisted slices, through a comprehensive rigorous computational fluid dynamics (CFD) approach. The CFD analysis indicates that reasonable placement of twisted slices could efficiently make changes at the micro scale and flow behaviors within a certain tube length. This leads directly to thinner boundary layer, and further increasing the capacity of cracking furnace, inhibiting coke formation, extending the operating cycle but slightly postponing reaction start-up. Simulation results can be used as scientific guide for further technical retrofit and operation improvement.
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