Abstract: Energy saving analysis of heaters is of great importance for petrochemical enterprises to ensure energy saving and safe operation. CFX software is adopted to carry out the numerical simulation of the three-dimensional flow field of GW5000 heaters. The k-ε turbulence model, PDF (probability density function) combustion model and Monte Carlo radiation model are applied in these calculations. The parameters of flow field, velocity field, temperature field, composition concentration field and heat flux density distribution on the tube surface are analyzed in detail. Meanwhile, tube wall distance optimization, burner online decoking, ash removal, fuel oil replacement, adding air preheater and other energy saving measures are also analyzed. These provide technical reference for researches on energy saving of heaters.

Key words: energy saving, CFX software, heater