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Dwell time

2019-06-11View Original

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There is a concept of internal residence time for the materials inside reactors, reaction vessels, and storage tanks. So how is the residence time defined for equipment equipped with agitators? Is there any material that provides a detailed classification and explanation of this dwell time?
Reply #22019-06-11
Find a book on reaction engineering that covers mixing equipment in detail; I learned about it a long time ago and can barely remember anything anymore.
Reply #32019-06-12
Retention time has nothing to do with whether there is stirring or not; under any circumstances, retention time is determined solely by the volume of the container
Reply #42019-06-12
Is that residence time only related to the volumetric flow rate and the volume of the equipment?
Reply #52019-06-12
Dwell time and equipment volume are related to the material density
Reply #62019-06-23
My understanding of residence time is the time difference between when the material enters and when it exits!
Reply #72019-07-09
Regarding the residence time of the reaction, theoretically it can be divided into plug flow and complete mixing flow. These are the two scenarios under ideal conditions. The residence time in a tubular reactor is based on **plug flow. As for the residence time in the mixing tank, if mixing is excellent, it can be approximated as complete mixing. For details, refer to reaction engineering.
Reply #82019-08-15
The original poster can check out the chemical process design manual; there are detailed examples related to reactors in it

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