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TECHNICALBULLETIN
MEG REGENERATION
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MEG REGENERATION
Mono ethylene glycol use
Mono Ethylene Glycol solution (MEG) is usedas hydrate formation inhibitor, as well as a
corrosion inhibitor with other chemicals (i.e.
Amine, etc.), in the submarine lines between
the offshore platforms and the onshore
receiving facilities or upstream of gas/gas
exchangers. Wet gas evacuation in the offshore
deepwater operations also enhances the
problems of salt contamination due to the
produced formation water.
In 2001 COMART was awarded the supply of
the MEG and TEG packages for the first Korean
National offshore project: Donghae. A study
for the installation of the glycol reclaiming has
been carried out due to the presence of highvolume of salt in the gas.
Three different needs andone common solution:
COMART
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SIMPLE, TESTED, EFFECTIVE & RELIABLE
PROCESS DESCRIPTION
The recovered Rich MEG upon entering the
Regeneration Skid, enters the 3 phase separator .
This vessel is a three phase separator where flashed
gases, liquid hydrocarbon, and Rich MEG phases are
separated.
The rich MEG from the 3 phase separator is routed
through the Charcoal and Cartridge Filters . Rich MEG
from the filters is passed through the MEG/MEG Heat
Exchanger where it is heated before entering the
Still Column . Still column is connected to the top of
the Reboiler. The vent (boiled water) from the Still
Column enters the Overhead Vapor condenser and
it is condensed. The condensed vapors enter
Condensed Vapor Accumulator . This vessel is a two
phase separator where small amount of non-
condensable gases, and condensed liquid phases are
separated.
The non-condensable gases are sent to LP Flare. The
condensed liquid is discharged through to outside
closed drain system.
Produced Water Pump (not part of Glycol Regeneration
Package). The regenerated Lean MEG from Reboiler
section enters the Surge Tank section. From Surge
Tank enters MEG Booster Pumps where pressure of
Lean MEG is increased . From MEG Booster Pump
Lean MEG passes through the MEG / MEG Heat
Exchanger before entering lean MEG storage tank or
injected directly into the hydrate preventing systems.
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The MEG catches most contaminants in the wet gas flow and they accumulate
in the systems inventory, creating plugging and troubles for the operations.
MEG will need to be reclaimed due to presence of salts and other contaminants.
The following products can be expected in the rich MEG:
- Corrosion products from pipeline (i.e. iron sulfide, carbonate, etc.)
- Scales from pipelines during initial start-up phase.
- Chemicals additive in the formation or pipeline .
- Produced salts
- Glycol degradation products , heavy boiling point hydrocarbons
For any additional information, please refer to our Technical Bulletin relating to GLYCOL RECLAIMING or ask for a
free copy of the our paper presented at OMC 2003
Headquarter: Via Zuccherificio, 1048010 Mezzano RA – ItalyTel. +39.0544.525050Fax +39.0544.525099
Web site:www.tozzisud.com/comart
E-mail:comart@tozzisud.com
World Offices:Houston USACaracas VENEZUELACairo EGYPTTripoli LYBIAAksai KAZAKHSTAN
contacts
parent company
Tozzi Sud S.p.A.