Column Wash (Simplified): Oper. Conds Tab

This tab appears on the interface dialog of the following operations:

Variable Definitions, Ranges and Default Values

The following table shows a brief description of the variables appearing in this tab. The table also displays their default values and their generally acceptable range:

Variable	Default Value	Range

◙ Linear Velocity (m/h) The linear velocity of the wash/regeneration solution in the bed.	3.0	Positive
◙ Absolute Flowrate (m³/h) The volumetric flowrate of the wash/regeneration solution in the bed.	0.0	Positive
◙ Relative Flowrate (BV/h) The volumetric flowrate of the wash/regeneration solution in the bed expressed as number of bed volumes per time unit.	0.0	Positive
◙ Relative Volume (per Cycle, per Unit) (BV) The volume of the wash/regeneration solution per cycle and per equipment unit, expressed as number of bed volumes.	2.0	Positive
◙ Absolute Volume (per Cycle, per Unit) (L) The volume of the wash/regeneration solution per cycle and per equipment unit.	0.0	Positive
◙ Washing Time (h) The actual duration of the operation (per cycle).	30.0	Positive
○ Wash Inlet Stream Indicates the input port that is connected to the wash inlet stream. If an input stream is already present at the selected port, then the button next to the selection is active. Click on the button to bring up the attached stream’s simulation dialog in order to provide the composition of the material being charged.	<None>	Any Input Port
○ Wash Outlet Stream Indicates the output port that is connected to the wash outlet stream. Click on the list box to bring up a list of available output ports in order to select one.	<none>	Any Output Port

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Specification Choices / Comments

The following list describes the available specification choices in this tab; for more details on how these are implemented, see Column Wash (Simplified): Modeling Calculations.

•Duration / Volume Options...

The user can choose whether process time is set or calculated. If the process time is set then the user has the option to specify either the Volume per cycle (in packed bed volumes) or the Flowrate. If the process time is calculated then the user can set both Flowrate and Volume per cycle.

•Composition of Wash Stream...

To specify the composition of eluant streams, click on the Edit Composition buttons. That brings up the dialog of that stream and allows you to specify its composition. Please note that the flowrate of that stream will be adjusted by the elution model during simulation.