Iron Scale problem in MEG regeneration system

Asked by Normandy 6 years, 2 months ago | 1 Answers

In MEG regeneration section of the plant has deposition of iron scales. Could some one help identify the issues?


1 Answer

1
odadmin 6 years, 2 months ago

Generally, scale deposition can takes place due to dissolved iron from corrosion. This will reduce heat exchangers performance, plug valves, etc. Scale type will vary with type of contaminants present in the Gas.

CO2 - CO2 dominated corrosion will have iron carbonate scales. These scales typically deposit on hot surfaces (heat exchangers) and on packing in contactor towers.

H2S - If H2S if present with CO2, iron sulfide films deposit instead of iron carbonate. Similar scaling issues are found.

Follwing are the typical Mitigation Methods:

  • pH modification
  • Internal coating
  • Corrosion resistant alloys
  • Corrosion Iinhibition

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