Modeling industrial scale reaction furnace using computational fluid dynamics: A case study in Ilam gas treating plant

In this study, the industrial scale reaction furnace of Ilam gas treating plant has been modeled by using of 3D computational fluid dynamics (CFD) method and the impact of checker-wall, refractory, ceramic seals are investigated. The simulation findings showed that Oxygen and acid gas at center tend to swirling when encounter to blades of air and acid gas diffusers, respectively as passes through furnace and directed to conical wall. Finally, good mixing between air and fuel is provided for combustion. Moreover, Sulfur dioxide is formed at beginning of flame, middle stage and before of choke-ring area and continues till checker-wall. Maximum production of Sulfur dioxide is attributed to pre-choke ring area. From obtained results, it can be found that Sulfur dioxide is formed at interface of air and acid gas and reaches to its maximum rate at air swirling area. Sulfur dioxide and Oxygen have a decreasing trend after checker-wall. The results also revealed that amount of radiation and tube-sheet temperature are reduced about 10571 W/m2 and 17.63 °C, respectively, when checker-wall exists in the reaction furnace.