How Do I Calculate the Height and Diameter of My CSTR Reactor?

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To calculate the height and diameter of a Continuous Stirred Tank Reactor (CSTR), a common guideline is to set the height at 1.5 times the diameter. For effective mixing, especially in slurry or viscous applications, a pitched-blade turbine with a diameter of half the tank diameter is recommended, positioned D/2 from the bottom. Additionally, incorporating vertical baffles at 90-degree intervals around the tank can enhance mixing efficiency. Specific mixing challenges, such as gas-liquid or liquid-liquid agitation, may require tailored approaches. Proper design is crucial for optimizing performance in processes like biodiesel production through esterification or transesterification.
princessme
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I have obtained the volume of my CSTR, how do I calculate the height and diameter of it? Is there a certain ratio to adhere to for better mixing? Tried reading up the rules of thumbs but no info on that. Tried searching other books too but to no avail.
 
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princessme said:
Is there a certain ratio to adhere to for better mixing?
Slurry? Viscosity is high? Low? Gas-liquid mixture agitation? You might get ideas from searching some specific mixing problems.
 
Bystander said:
Slurry? Viscosity is high? Low? Gas-liquid mixture agitation? You might get ideas from searching some specific mixing problems.
Liquid-liquid mixture agitation, for production of biodiesel through esterification/transesterification.
 
I'd start with tank diameter D and height 1.5D, with one center-top-entering 45o pitched-blade turbine of diameter D/2 located a distance D/2 from the bottom. Add 4 - 1.4D high, 0.1D wide vertical tank baffles at 90o around the tank periphery.
 

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