Abstract: In this paper, the computational fluid dynamics software ANSYS fluent is used to conduct numerical simulation research on a hydrogenation feed heating furnace. The surface thermal intensity of the radiation furnace tube, fuel combustion degree, radiation section furnace temperature, radiation section heat load, and NO_x generation under five conditions of excess air coefficient were compared and analyzed. Then the influence of excess air coefficient on the performance of the radiation section of the hydrogenation feed heating furnace was obtained. This can provide reference for the engineering design and operation of subsequent hydrogenation reaction feed heating furnaces.

Key words: excess air coefficient, hydrogenation feed heating furnace, numerical simulation