Chemical cleaning of a boiler - CTP environnement group

An oil refiner recognised the need for chemical cleaning of a water side steam generation boiler as part of its maintenance programme.

After analysing the residues, CTP environnement suggested the following successive treatments for this chemical cleaning operation:

Decoppering to remove all the copper oxides originating from air cooled condenser tubes
Chemical cleaning to remove the layer of iron oxide (magnetite) accumulated over time
Pre-passivation and passivation to re-create a necessary new passive layer of iron oxide (maghemite).

Clogging of the boiler proved to be uniform in terms of chemical composition but was unevenly distributed in various areas.

Whilst control of the chemistry is important in chemical cleaning, some consideration should be given to the engineering aspects of the procedure to ensure the correct exposure of residues to solutions, above all for equipment not designed to be cleaned by circulation using an external pumping unit.

CTP environment’s chemical and hydraulic expertise enabled this operation to be completed successfully, to the client’s entire satisfaction on both a technical and organisational level.

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In our American subsidiary based in Houston, Neyl stood out brilliantly by winning first place at the V.I.E Grand Prix Americas 2025, an award that recognized 4 winners out of 97 candidates. His original and impactful video—highlighting France as THE go-to destination for innovation and investment—made all the difference.