Coldfinger technology applications 2

[roaling]

I am a professional for the first time involved in problems with Teg gas dehydration systems. Has anyone had experiences with Coldfinger technology in applications with high Teg concentration, 99% and more ? Any information would be very appreciated.

 

[25362]

Suggets you google around. Some sites I found:

http://www.gasprocessors.com/Globaldocuments/E00Sept_02.PDF

http://www.gpaeurope.com/InBrief?Feb2001.pdf

http://www.tozzisud.com/pdf/Comart.pdf

Good luck.

 

[RRE]

roaling
The use of Cold Finger for TEG concentration has been done for several years. The original patent was drafted in 1975 by Laurence Reid in a paper presented at the Gas Conditioning Conference in Norman Oklahoma (now refered to as the Laurence Reid Conference). The process involves concentrating the glycol by installing a trough that helps concentrate the glycol (by removing the water) further shifting the equilibrium. The theorical result would be to concentrate the glycol, hence, you might achieve a lower dewpoint.

True life (reality) has been mixed. In my operations, these have not worked when installed. We will, however, install a Stahl column that can have varying purge gas rates. This design is better and proven.

 

[MortenA]

I dont work much with TEG gas drying and only from engineering point of view - but i have heard the same as RRE - it should be better but dosnt work that well.

Best regards

Morten

 

[kchokkarapu]

We have a Cold finger unit installed in our dehydration package. Plant is built in 1988 to dehydrate CO2 rich gas.
Right from the start we had several operating problems like Pressure and Temperature swings. Unit condensed excess glycol along with the water and created a pressure swing the system. Condensed liquids were again routed back to the still column which again created high fuel gas usage.

On the whole i would recomend staying away from these units and investigate into Stripping gas or Sthal columns. Stripping gas technique is waht i am implimenting now to produce 99.96 wt% glycol. Foe an existing dehy unit addition of stripping gas column is more economical than DRIZO or Mole Seive units.

Good luck