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  1. STI666

    Atmospheric Distillation column

    It would be interesting to hear if you had an upset or pressure surge to damage the trays. Gamma Scanning the tower will let you know the status of the trays (if they are in place, missing or damaged) as well as any fluid operating characteristics of the tower if the trays are in place (liquid...
  2. STI666

    [b] The liquid methanol blow out from stripper [/b]

    If you are having problems with the operation of the tower as described you may want to conduct a Gamma Scan of the tower to confirm or reject possibilities. From your initial question, yes it did appear that the trays were fouling off, after you mentioned the damaged downcomers and the upsets...
  3. STI666

    Distillation columns gamma scanning

    Gents, Jason5000 makes some good points on Gamma Scanning. The scanning crew should be a good reference to suggest the best procedure, with your consultation, to obtain good results. In the first example, the tower was most likely scanned in an unflooded operating condition to verify that the...
  4. STI666

    Naphtha stabilizer operation

    Jan, If you are now thinking that the trays may be fouled or damaged, a Gamma Scan of the tower may help to resolve this issue. Scanning Technologies works in several countries around the world. Visit their website at www.scanningtech.com for more information on this service.
  5. STI666

    CBL interpretation

    Try anything by James Smolen. I took a course from him once on cased hole and PL evaluation. He was very knowledgeable and entertaining.
  6. STI666

    Gamma Scanning

    Scanning Technologies provides Gamma Scanning services as well as Tracerco/TruTec. I would suggest Gamma Scans be performed across all of the active areas of the trays as one section may be giving you problems and the other side not. To evaluate antifoam use, Gamma Scanning can be performed...
  7. STI666

    Column Scan to identify operational Problems

    I formerly worked for Tracerco and they definitely have the technology to tag the feeds, one at a time, and perform a distribution study through your vessel to provide the required information. They use short lived radioisotopes and will perform all of the necessary calculations to ensure the...
  8. STI666

    oil refinery turnaround preparation

    You may also want to consider using some Gamma Scanning to inspect the operation of the columns before you shut down. This may reduce the number of columns you actually need to enter for inspection/repair or can indicate the extent of the repairs that will be required so you can plan time...
  9. STI666

    Decanter rag layer detection

    You may want to look into Neutron Backscatter technologies. They are based on the hydrogen content of the process fluids and can determine interfaces such as oil/water/vapour as well as emulsion layers. The one drawback is the depth of investigation is limited to about 4 inches from the...
  10. STI666

    Re-tray project advice - typical plant owner inspection ? advice

    Everyone has noted excellent comments about post installation inspections. At the end of it all the responsibility is yours to ensure that all has been installed correctly. If something goes wrong as epoisses mentions, it can cost a lot of money and possibly another shutdown or two to fix...
  11. STI666

    Looking for any advice for a new MWD hand...

    I've worked as a wireline hand and MWD over the past 10 years for a few different companies in Canada and abroad. My advice to any MWD new people is to become an avid reader or take up something constructive on the computer (courses, programming, etc.) this will help to pass the time. The work...
  12. STI666

    Tray Damage Detection

    imans, Gamma Scanning will indeed tell you if there is tray damage and also problems in packed beds. Check out our website at www.scanningtech.com for more information on the service and to request information. We offer the same services as Tracerco and TruTec at more cost effective...
  13. STI666

    Distillation - Downcomer Flood % Calculation

    This does not involve the calculations but to actually see the extent of flooding on the trays or liquid in the downcomers you could use a service called a Gamma Scan. It is non-invasive and is done while on-line. It can tell you the height of liquid on trays, flooding, foaming, entrainment...

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