Glycol injection for hydrate prevention
Glycol injection for hydrate prevention
(OP)
I use MEG injection as a hydrate inhibitor when my gas pipeline pressures/temps get inside the hydrate formation envelope.
Does anyone have any ideas on injection rates ?
I'm basically just guessing and probably way over injecting and wasting glycol.
A calculation or table based on gas composition/temp/press/flow would be much appreciated.
Does anyone have any ideas on injection rates ?
I'm basically just guessing and probably way over injecting and wasting glycol.
A calculation or table based on gas composition/temp/press/flow would be much appreciated.





RE: Glycol injection for hydrate prevention
The calc should allow for initial glycol concentration, glycol lost to the vapour phase and glycol lost to the condensate phase.
RE: Glycol injection for hydrate prevention
RE: Glycol injection for hydrate prevention
Inside this book, you will find method to estimate MEG requirement.
You calculate the minimum inhibitor concentration required in your water phase based on Hammerschmidt's equation, then you size your dosing rate based on your production rate.
RE: Glycol injection for hydrate prevention
I know of Hammerschmidts equation but I really don't have much idea of how wet my gas is. All I can go by is comparing what is knocked out in the separator against total volume flow
RE: Glycol injection for hydrate prevention
The water flow would be based on the liquid flows into the separator. Assume that the gas is fully saturated with water.
RE: Glycol injection for hydrate prevention
RE: Glycol injection for hydrate prevention
RE: Glycol injection for hydrate prevention
Best regards
Morten
RE: Glycol injection for hydrate prevention
For 100 MMSCFD at 1200 psia and 100 F with a hydrate temperature of 65 F and an ultimate temperature of 40F, you'll need 4350 pounds per day of 80% by weight EG.
Get the book and see the details, but this should give you a clue of where you should be.
RE: Glycol injection for hydrate prevention
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