Column Random Packing Rating

Details for an existing random packing in a column section are entered in this window. See Random Packing Calculations for more information.

Usage

From the Column Tray and Packing Hydraulics Window, define a column section in the table, select Random Packing as the Internals and select the Rating option in the Calculation Type drop-down list box.

Push the corresponding Enter Data button to enter information for the selected column section.

Manufacturer

Currently, only KOCH-GLITSCH packings are supported. Koch-Glitsch, LP now owns the packings formerly supplied by the Norton Company. For many column algorithms, pre-configured data for the original Norton packings still is available by selecting Norton as the packing manufacturer.

For the RATEFRAC algorithm, only KOCH-GLITSCH packings are supported. (Packings listed under the manufacturer Norton are not available in RATEFRAC).

Packing Characteristics

The Packing Factor must be supplied. This can be either entered by the program for a predefined Type or specified directly. See Random Packing Characteristics for more details.

Packing Height

The HETP may calculated by the FRANK method (default) or the Norton method. The Packing Size is required to calculate HETP. Alternatively, you may specify the HETP or Height directly. The relationship is:

HETP = Height / Number Of Packed Stages

Approach Calculations

By default, the Approach to Flooding will be calculated for each stage. If IMTP packing is selected, you may specify that the Approach to Efficient Velocity should be calculated instead.

Pressure Drop Method

You may change the default Norton method to the Tsai method.

When using the RATEFRAC algorithm with KOCH-GLITSCH packings, the KOCH-GLITSCH method is the only available method.

Column Diameter

You must specify the diameter of the packed section of the column that is to be rated.

Maximum Velocity

You may specify the Maximum Velocity for the approach calculations. If not supplied, a value will be calculated.

Perform Tray Random Packing Rating Calculations

Select the desired Tray Random Packing Rating Calculation option by clicking on the appropriate radio button. Normally, packing rating calculations are performed to update the column pressure profile to the calculated tray pressure drops and re-calculate the column with the new profile. See Packing Rating/Sizing at Output or Calculation Time for description of the options.

Click RATEFRAC options... to pop up the Column - RATEFRAC Packing Options dialog box.

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