Design of feeding and discharging methods for continuously stirred tank reactors
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Hello, everyone! I need to design a simple CSTR recently, but I’m not sure which feeding and discharging method to use, or if there is a better approach: (1) Three feeding pipes extend to the bottom of the reactor, with an opening created at the level at which the liquid level in the reactor is controlled; when the liquid level rises to that position, the material automatically overflows from this opening in order to maintain a constant total volume of liquid inside the reactor ； (2) Three feeding pipes are installed on the top cover of the tank, with their lower ends located above the liquid surface ； A discharge pipe extends below the liquid level at the bottom of the tank, with a peristaltic pump added to make dynamic adjustments based on the total feed volume ； Which solution is most commonly used in industry? The reaction I need to carry out is in a solid-liquid suspension aqueous system at 80 degrees Celsius, thank you!
Actually, either one will do, but if it were me, I would definitely choose the first option – it’s more convenient and cost-effective, as it eliminates the need for a peristaltic pump
The CSTR process is used to treat feed materials with high suspended solid contents, ensuring a uniform distribution of the material within the reactor, preventing stratification, and increasing the opportunities for contact between the different phases. This allows the suspended solids on the liquid surface to circulate to the lower part of the reactor, where they undergo complete reaction gradually, keeping the reactant concentration at a relatively low level and preventing the formation of a \"cover\" on the surface of the reactor liquid. I think the second option is better, whether considering the discharge or from a reaction perspective.
So how is the discharge port designed for CSTRs used in industry? Which expert can provide a public CSTR design diagram? Thank you!