Pull-In Advanced Options Dialog

Variable Definitions, Ranges and Default Values

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

Variable	Default Value	Range

◙ Ignore Initial Vapor Contents Choose whether the initial vapor contents will be taken into account in the mass balances	True	True/ False
○ Specification Options User may choose to specify the ratio (added amount / initial amount), the final amount or the composition of the pull in stream.	Ratio	Ratio/ Final Amount or Compo-sition
○ Ratio Options User may choose to set the mass ratio or the liquid solid volume ratio.	Mass	Mass/ Liquid-Solid Volume
◙ Mass Ratio	0.0	Positive
◙ Liquid Solid Volume Ratio	0.0	Positive
○ Added Amount Options User may choose the total added amount or the added amount of a specific component	Total	Total/ Compo-nent
○ Total Initial Options User may choose the total initial amount or the initial amount of a component	Total	Total/ Compo-nent
○ Final Amount Options User may choose to set the mass final amount or the liquid-solid volume final amount.	Mass	Mass/ Liquid-Solid Volume
◙ Final Mass (kg)	0.0	Positive
◙ Final Liquid-Solid Volume (L)	0.0	Positive
◙ Maximum Number of Iterations The maximum number of iterations for converging to the specified final liquid-solid volume amount.	1000	Positive Integer
◙ Relative Error Precision of the convergence calculations	0.001	10^-7- 1.0
◙ Component for composition option	(none)	Pure Compo-nent
○ Composition Options User may choose to set the mass percentage or the concentration of the composition of the selected component	Mass	Mass / Concen-ntration
◙ Mass Percentage (%)	0.0	0.0-100.
◙ Concentration (g/L)	0.0	Positive
◙ Maximum Number of Iterations The maximum number of iterations for converging to the specified concentration.	1000	Positive Integer
◙ Relative Error Precision of the convergence calculations	0.001	10^-7- 1.0
○ Final Temperature Option User may choose to set the final temperature of the mixture contents after material has been pulled in.	Tempe-rature	Tempe-rature
◙ Final Temperature (^oC) The final temperature of the mixture	25.0	Positive
○ Output pH The pH of the mixture.	7.0
○ Initial Guess Set by User Check this box to provide an initial guess for the add-in stream flow.	No	Yes/No
◙ Initial Guess The initial guess for the add-in stream flow.	0.0	Positive

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 Pull In: Modeling Calculations.

Chose whether the initial vapor contents (i.e. inert vapors) will be taken into account in the mass balance. Select one of the following mixing specifications:

● Ratio (Added amount –to initial amount) :In this case you can specify either the mass ratio or the liquid volume ratio between the add-in stream and the initial contents. Furthermore you can ask the numerator of the ratio to be either the mass/volume of the add-in stream or just one (user-selected) component in the add-in stream. In the same spirit, the denominator used to calculate the specified ratio, may be either the total mass (or volume) of the initial contents or the mass (or volume) of a specific (user-selected) component initially present in the vessel.

● Final Amount - either the Final Mass or the Final Liquid-Solid Volume

● A reference component and either its final Concentration or its final Mass Percentage

● Final Temperature: Specify the desired final temperature of the contents of the after the material has been pulled in.

The model will set the pull-in amount of the adjustable mix-inlet stream (top stream) in order to meet the specification set by the user. If the specification cannot be met, then a warning message will be displayed during simulation.

Pull-In Advanced Options Dialog

Variable Definitions, Ranges and Default Values

Specification Choices / Comments

See Also