A Pull Out operation is similar, in concept, to a Transfer Out operation but with one very important difference: the amount of material being transferred out is not directly known and therefore not set by user but computed during simulation.
This operation may result in VOC emissions if volatile compounds are involved; for more details, see Chapter 10 (Emissions).
● Batch Vessel Procedure in a Reactor
● Batch Vessel Procedure in a Seed Reactor
● Batch Vessel Procedure in a Bioreactor
● Batch Vessel Procedure in a Seed Bioreactor
● Batch Vessel Procedure in a Disposable Bioreactor
● Batch Vessel Procedure in a Disposable Seed Bioreactor
● Batch Vessel Procedure in a Fermentor
● Batch Vessel Procedure in a Seed Fermentor
● Batch Vessel Procedure in a Disposable Bioreactor
● Inoculum Preparation Procedure in a Rocking Bioreactor
● Inoculum Preparation Procedure in a Roller Bottle
● Inoculum Preparation Procedure in a T-Flask
● Inoculum Preparation Procedure in a Shake Flask
● Inoculum Preparation Procedure in a Test Tube
● Batch Distillation Procedure
● Batch Storage in a Blending Tank Procedure
● Batch Storage in a Flat Bottom Tank Procedure
● Batch Storage in a Receiver Tank Procedure
● Batch Storage in a Horizontal Tank Procedure
● Batch Storage in a Vertical-on-Legs Tank Procedure
● Batch Storage in a Drum Procedure
● Batch Storage in a Drum Procedure
● Batch Storage in a Disposable Generic Container Procedure
● Batch Storage in a Disposable Large Bag (on a Skid) Procedure
● Batch 1x1 Generic Box Procedure
● Batch 3x3 Generic Box Procedure
● Batch 5x5 Generic Box Procedure
● Batch 10x10 Generic Box Procedure
The operation removes the material of the designated pull out stream from material as found in the host vessel at the end of the previous operation (if any). The results of the operation are left as the equipment contents at the end of the charge operation.
The modeling equations of a Pull Out operation are very simple. However, this model is quite unique in the following way: While the majority of models in SuperPro Designer combine variables from input streams and/or the state of the unit procedure (before the operation is executed) with operating conditions and compute variables describing the state of the unit procedure (after the operation) and output streams, this operation operates in reverse: It consults the amount of material demanded at an output stream associated with it (the “pull-out” stream) and it modifies the content of the vessel such that the contents before and after differ by exactly that amount. Since the operation raising the demand for material that is to be satisfied by this pull-out operation is downstream, the solution engine will visit this operation before it visits the material-demanding operation. Therefore, during the first pass of the solution, the pull-out operation will not consider the correct amount demanded. However, SuperPro Designer uses a sophisticated back-propagation scheme that will correct the situation as soon as the downstream operation is reached. When that happens, and as soon as the correct demand is computed, it is propagated backwards, through the network of connectivity, until it reaches:
a) A pull-out operation in a vessel, or
b) An input stream with the ‘auto-adjust’ flag turned on.
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If the solution engine never encounters such an operation (that will trigger a backwards propagating scheme) the pull-out operation will remain inactive. In other words, the operation will send on to the output stream whatever amount happened to be from the previous run. |
For more details on back-propagating stream demand, see Back-Propagation: Sources (Initiators) & Sinks (Terminals).
See Batch Vessel Operations: Equipment Sizing.
See Vacuum Pump Auxiliary Equipment Calculations.
The interface of this operation has the following tabs:
● Oper. Cond’s, see Pull Out: Oper. Conds Tab
● Volumes, see Batch Vessel Operations: Volumes Tab
● Vent/Emissions, see Vessel 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
