Numerical Simulation Of Cyclone Separator With Sleeve-type Heat Exchanger

In this paper,we design a kind of cyclone separator with Sleeve-type heat exchanger.By using the method of numerical simulation,we study the internal flow regularity and heat transfer mechanism.Add surface protuberance on heat exchange surface to enhance heat transfer rate.And compare with cyclone separator with heat pipe exchanger.The main conclusions are as follows:For cyclone separator with heat pipe exchanger,we simulate the heat transfer effect in 20 ?,40 ?,60 ?,80 ?conditions.The results show that with the decrease of the evaporation temperature,the temperature difference on two sides of heat exchange surface increasing,heat transfer effect enhancing,the maximum temperature drop is 60 K.With the increasing of heat transfer area,the overall heat transfer rate increasing,but the heat transfer rate of unit area reducing.For cyclone separator with Sleeve-type heat exchanger with no protuberance,we define the flue gas inlet velocity of 20 m / s,the water inlet velocity was 0.1m / s,0.5m / s,1m / s,1.5m / s,the results show that cyclone separator with Sleeve exchanger having a good heat transfer performance,in the above four operational conditions,the maximum temperature drop is up to 36 K.And with the increasing of the water inlet velocity.heat transfer effect gradually increase,but the rate of change with the flow speed increases gradually decrease.For cyclone separator with Sleeve-type heat exchanger with protuberance,we define 16,32,64,80 protuberance respectively for the study,the protuberance in the form of spherical protuberance.The results show that protuberance for enhancing heat transfer has a positive effect,the maximum flue gas temperature drop is up to 100 K.However,the number of protuberance should be moderate,excessive amount of protuberance does not further increase the heat transfer effect.