Numerical Simulation on the Mixing in a Multi-Jet Gas-Gas Mixer
Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
Abstract For developing new jet-mixers, numerical simulations were performed by software Fluent according to the k-ε turbulence model, to study the effects of various geometric and process parameters on the mixing characteristics of ethylbenzene gas and steam in multi-jet mixers equipped on the ethyl benzene dehydrogenation unit, the mixing performance of fluids was characterized with the mixing index. It is found that the jet velocity, jet length, jet number and operational load affected on the mixing efficiency significantly. The mixing efficiency of gas-gas mixer was perfect and the total pressure drop was low as jet velocity was equal to 142 m/s, jet length was 40 mm and jet number was six. The results presented here are very useful for the preliminary design of multi-jet mixer for low viscosity fluids.
