Abstract: Tube furnace is one of the key equipment in petrochemical plants and the flow medium inside the tube is mostly flammable and explosive hydrocarbon fluids. The furnace tubes withstand high temperature, high pressure and corrosion, so the selection of materialis usually of higher grade with a relatively large investment proportion. Therefore, how to improve the utilization rate of furnace tubes and achieve more economical and efficient design has always been a key direction in furnace design. Adopting case comparative analysis method, this paper explores the optimization design of convection section structure of tube furnace. It verifies the effectiveness of improving the utilization rate of convection coils and provides specific improvement design plans for the convection section. This provides reference for reducing the investment in tube furnace and improving industrial furnace design.

Key words: furnace, convection coil, optimization design