The Experimental Study And Thermal Numerical Simulation Of SL-ⅡPyrolyzer

Large difference in temperature of tubular reactor in ethylene pyrolyzing furnace make more quick coke formation on where the reactor has higher temperature. The following results are such as shorter run time than designed or shorter lifetime of tubes. Four SL-â…¡ethylene pyrolyzing furnaces have the same problems in Yangzi Petrochemical Company. To reduce the temperature difference on tubular reactor, the distribution of temperature in furnace must be optimized. In this paper, the flow field of the furnace is studied through experiment and numerical simulation. And than a coupling simulation between tubular reactor and furnace is studied for provide theoretical guide for commissioning work later.According to similarity modeling theory, a cold-state simulation experimental equipment of SL-â…¡ethylene pyrolyzing furnace is set up. Particle Image Velocimetry has been used to test fluid field of the furnace in five different conditions include one operating condition. By using FLUENT software, the same model has been simulated. The simulation results of velocity distribution tally with the results of flow field of the experiment.In the numerical simulation of tubular reactor and furnace, process of fluid, heat and mass transfer, combustion and radiation in furnace and pyrolyzing reaction in tubular reactor have been studied. The results include velocity, temperature and spices distribution in furnace and temperature and production distribution in tubular reactor.