Sarnia, ON   Toledo, OH Edmonton, AB U.S. Gulf Coast
Phone: (519) 344 - 7132

(419) 931 - 6689

(780) 485 - 2655 (888) 724 - 1798
Fax: (519) 336 - 8340

(419) 754 - 2487

(780) 669 - 5855 (281) 966 - 6983
 

Toll Free    U.S.A. &  Canada (888) 724 - 1798   Email:  info@towerscan.com

 
Home ] Case Examples ] Gamma Scanning ] Request Estimate - Info ] Customers ] Level Measurement ] Pipe Scanning ] Careers ] Safety ] Francais ] Use Existing Scans ] Links ] Online Reports ] Help Others ]

 

 

[Gamma Scanning] Trayed Towers ] [ Packed Towers ] [Case Examples]

Gamma Scanning Columns with Packed Beds

TowerScan wants to help you solve your packed bed troubleshooting challenges.  Our “TowerScan” gamma scanning service provides you with the best method of finding out what is happening inside your column while it is still in operation – saving time and money. 

When a packed bed column is scanned, the two most common scenarios are where a single scan is performed, or scans on a 2 x 2 grid as shown in Figure 1. 

A single “TowerScan” on a packed bed column will determine:

whether all the packed beds are present in the column

 

if the beds have experienced any damage or settling of the packing

 

the liquid level on chimney and collector trays

 

if any of the beds have experienced flooding or fouling

 

whether the demister pads and distributors are at their proper elevations

 

By performing and analyzing a full 2 x 2 grid scan, our engineers evaluate:

the extent and location of liquid maldistributions within the packed beds

 

if tower internals such as demister pads, distributors, trays, and the top of beds are level  

 

In addition to using gamma scans as a troubleshooting tool, some companies make excellent use of the information to schedule shutdowns.  In processes where they know the packing gradually becomes fouled, periodic scans monitor the progress of the fouling.  They can then accurately schedule their turnarounds, as opposed to having to incur sudden, unexpected, and costly shutdowns. Examples of “before” and “after” scans performed on a tower are shown in Figure 2. 

The initial scan (red) showed that the demister pad, distributor, packed bed, and chimney tray were at the proper elevations.  The bed however had experienced severe fouling, especially in the bottom two thirds of the packing.  The column was shut down and the packing replaced.

The scan taken after the turnaround (blue) exhibited a far more uniform bed density. Some higher densities were seen at the top and bottom of the bed due to the hold down plate and bed support, and part way down the bed due to external mechanical interference.

Call TowerScan today to find out how we can help you.  Our staff have been scanning columns since 1989 and have the experience you need.   Already the leader in quality and value, TowerScan will continue to be their customers first choice for column troubleshooting and process optimization.

 

Why settle for a gamma scan when you can have a TowerScan™

 

 

Toll Free    U.S.A. &  Canada (888) 724 - 1798   Email:  info@towerscan.com 

Copyright © 2000 TowerScan
Last modified: March 05, 2013

Privacy Policy

    Safety Certified by:

Contractor Prequalification, Contractor Management, Supplier Relationship Management