Causes to Low PH in Glycol Systems
Causes to Low PH in Glycol Systems
(OP)
I have encountered a EG glycol system on a refrig plant that has a low pH approximately 5. What are some of the potential causes of this low pH and perhaps some solutions to keep it in a more normal range.
Thanks
Thanks





RE: Causes to Low PH in Glycol Systems
ck1999
RE: Causes to Low PH in Glycol Systems
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: Causes to Low PH in Glycol Systems
RE: Causes to Low PH in Glycol Systems
For the first two you can only use pH control chemicals for the second you should make sure that any spent TEG is not returned to the system and that the surge tank and reboiler are adequately purged. Usually there is a fuel gas pressure blanket on the flash drum and the stripping gas to reboiler along with steam keeps the reboiler oxygen free, but if your design doesnt incorporate this or you have extended shutdown periods you may get problems.
RE: Causes to Low PH in Glycol Systems