This operation can handle any number of sequential material transformations (reactions) that happen continuously in a stirred tank and for which kinetic expressions are unknown or unimportant.
● Continuous Stoichiometric Reaction Procedure in a CSTR
See Stoichiometric Reaction Operations: Modeling Calculations.
In Design Mode of calculation, the user specifies the residence time (tR) and the working to vessel volume ratio. The working (liquid) volume (Vw) and the vessel volume (V) are calculated using the following equation
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where F is the feed volumetric flowrate, along with eq. (A.5).
If the calculated vessel volume exceeds its maximum possible value (specified through the Equipment tab), the program assumes multiple, identical units operating in parallel with a total vessel volume equal to the calculated.
In Rating Mode, the user specifies the vessel volume, the number of units, and either the residence time or the working to vessel volume ratio. When the residence time is specified, the program calculates the working to vessel volume ratio and checks to make sure that the calculated value is between the minimum and maximum working to vessel volume ratio limits. When the working to vessel volume ratio is specified, the program calculates the residence time using the equations above.
If this unit operates in a batch plant, the feed flowrate F is calculated by dividing the volume of material that needs to be processed per cycle by the process time.
See Vacuum Pump Auxiliary Equipment Calculations.
The interface of this operation has the following tabs:
● Oper. Cond’s, see Continuous Reaction Operations: Oper. Conds Tab
● Volumes, see Continuous Vessel Operations (Design Mode): Volumes Tab and Continuous Vessel Operations (Rating Mode): Volumes Tab
● Reactions, see Stoichiometric Reaction/Fermentation Operation: Reactions Tab
● Split, see Continuous Reaction / Storage Operations: Split Tab
● Vent/Emissions, see Reaction Operations: Vent/Emissions Tab
● Labor, etc, see Operations Dialog: Labor etc. Tab
● Description, see Operations Dialog: Description Tab
● Batch Sheet, see Operations Dialog: Batch Sheet Tab
● Scheduling, see Operations Dialog: Scheduling Tab