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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.