Numerical Simulation Of The Evaporative Cooler In The Converter Dry Dedusting System

For good economic benefits and environmental benefits the converter dry dedusting technology draws the iron and steel enterprise’s attention. But with the features of complex production process and intermittent operation, there are some problems like operation difficult, devices scaling and electrostatic precipitator explosion. So how to make the dedusting system operating safely and smoothly becomes the emphasis to study.Theoretical analysis, numerical simulation and field data collection are combined together to deeply study the fume flow and heat transfer process in the vaporization cooling flue and evaporative cooler. The results show that The vaporization cooling flue is the main cooler place and the temperature is 800℃ in exit of the flue. The velocity, temperature and pressure profiles are uneven, and there is pressure concentration at the flue corner. The velocity is uneven too in the exit of flue and the mean velocity is about 10m/s. The fume velocity is large in the center of the evaporative cooler while the fume velocity is small near the wall. The velocity profile is uneven in the exit of the evaporative cooler, and the velocity is low near the body of the evaporative cooler, while the other side velocity is high, and the mean velocity is about 11 m/s. The atomized water evaporate in 2 second completely, making the fume temperature decrease to 350℃ sharply. After the nozzles region the temperature decrease slowly, and the fume temperature is about 190℃ in the exit of the evaporative cooler. The dust particle with large diameter is collected at the bottom of the evaporative cooler while partly little dust particle return the top with fume backflow easily causing the scaling phenomenon, and the fume flow field became more complicated after scaling phenomenon.Numerical simulations of the vaporization cooling flue and evaporative cooler establish an effective method to know about the fume flow and the heat transfer process in the dedusting system, and provide the reference for making the dedusting system work safely and smoothly and optimizing the dedusting system.