Ephrem Haile Tesfaye Community Member 1 Post
Re: What is a suitable mixer design for liquid detergents?23 August 2013 at 11:18amTopic: Can you help me design a mixer for liquid soap?I have a mixer tank with these dimensions: width 0.8m, height 1m. I want to use this mixer for liquid detergent industries where viscosity is between 1000-3000 cps at ambient temperature. What is the most suitable design for motor power, shaft, and impeller? Post your comment Subscribe
Dave Dickey Forum Moderator 351 Posts
Re: What is a suitable mixer design for liquid detergents?26 August 2013 at 12:46pm
Recommended for this application is a vertical, center-mounted mixer with a 0.3 meter diameter, 4-blade, pitched-blade turbine, operating at 5 revolutions per second. The impeller should be located 0.2 to 0.3 meters off the bottom. The motor needs to be 1 kW or larger.
If the soap is less viscous at a higher operating temperature, four 0.07 meter wide, vertical baffles on the walls of the tank may be necessary to prevent uncontrolled swirling and to promote vertical mixing.
The answers by this expert are based on the best available interpretation of the information provided. The consequences of the application of this information are the responsibility of the user. If clarification is needed, please submit a further question.
Detergent applications may require different levels of mixing intensity depending on how the process is done. The following two options will provide moderately intense mixing or adequate mixing depending on the processing requirements. Both options, as described, use the same impeller system.For moderately intense mixing: a 2.2 kW motor, with a shaft speed of 68 rpm, and two (2) four-blade, 45-deg, pitched-blade impellers, 0.75 m in diameter with 0.15 m wide blades.For adequate, but less intense mixing: a 1.1 kW motor, with a shaft speed of 56 rpm, and two (2) four-blade, 45-deg, pitched-blade impellers, 0.75 m in diameter with 0.15 m wide blades. Both designs assume that the mixer will be center mounted in the tank and that the tank will have baffles, four (4) baffles at 90 deg, 0.125 m wide to avoid uncontrolled swirling. Without baffles, the moderately intense mixing selection would probably splash out of the tank.
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