Liquid phase mixing in a jet mixed gas-liquid system

In the present work, some affected parameters on the liquid phase mixing in the proposed jet mixed gas- liquid system were studied experimentally. In this two-phase mixing system, instead the impeller in convectional stirred tanks the jet fluid has been used as a mixer. In the mixing vessel the jet flow and gas flow are countercurrent. The studied parameters included aeration rate, jet flow rate and nozzle diameter. The created flow pattern extracted for each condition and results often analyzed on the basis of them. It is obtained, on the basis of jet Reynolds number and the amount of jet travelling in the vessel, increasing of aeration rate have different effects on the performance of mixing. Generally four different trends for variation of mixing time with increasing of aeration rate are observed. Decreasing of nozzle diameter at constant jet flow rate or increasing of jet flow at constant nozzle diameter continuously decreases the mixing time. Too, comparison of the jet mixed system results with the results of similar mechanically stirred system shows the improving of liquid phase mixing in the jet mixed system.

کلیدواژه ها:

mixing time ، jet flow ، aeration ، flow pattern ، jet Reynolds number