It is desired to form an emulsion by mixing two liquids, such as oil and water...

 

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It is desired to form an emulsion by mixing two liquids, such as oil and water using a Rushton turbine. For this example, assume that the emulsion is successfully formed if the average size of oil droplets is less than 100 microns. Assume furthermore that the dimension of the tank is 2,500 m, that the maximum diameter of the impeller is 2.5 m, and the maximum rotation speed is 800 rpm. 1) (10%) Provide a description of a Rushton turbine as supplied by a manufacturer (i.e., use the internet and/or call a manufacturer). Provide schematics, figures, tables, etc.. 2) (50%) The power supplied by a Rushton turbine to the surrounding water body is given by the formula: P = Krn d p where KT is an "impeller constant" varying between 0.32 and 1.6 in general. Use the values 0.3 and 1.2 herein. n-rotational speed, revolution/second. d-Impeller diameter (m) p= density of fluid (kg/m) Design a Rushton turbine that provides the minimum requirement for emulsion formation. Namely, find the combinations' values of d and n that achieve emulsion. Also compute the velocity gradient G= uv Plot and discuss all results. 1/2 for these combinations, where V is the volume of the tank. It is desired to form an emulsion by mixing two liquids, such as oil and water using a Rushton turbine. For this example, assume that the emulsion is successfully formed if the average size of oil droplets is less than 100 microns. Assume furthermore that the dimension of the tank is 2,500 m, that the maximum diameter of the impeller is 2.5 m, and the maximum rotation speed is 800 rpm. 1) (10%) Provide a description of a Rushton turbine as supplied by a manufacturer (i.e., use the internet and/or call a manufacturer). Provide schematics, figures, tables, etc.. 2) (50%) The power supplied by a Rushton turbine to the surrounding water body is given by the formula: P = Krn d p where KT is an "impeller constant" varying between 0.32 and 1.6 in general. Use the values 0.3 and 1.2 herein. n-rotational speed, revolution/second. d-Impeller diameter (m) p= density of fluid (kg/m) Design a Rushton turbine that provides the minimum requirement for emulsion formation. Namely, find the combinations' values of d and n that achieve emulsion. Also compute the velocity gradient G= uv Plot and discuss all results. 1/2 for these combinations, where V is the volume of the tank.