A word from ODYSSEE
Treated using conventional agents, this 1.3-million-gallon closed network ended up getting clogged.
The rollout of our ODYTHERM FS510P solution, combined with an appropriate treatment and operating methodology, was able to stabilize a network with substantial deviations, eliminating all of its issues.
Contexte
Adress
Dijon
France
Equipment
District heating system with two boilers
Combined heat and power generation
Materials present
Steel, copper and stainless steel
Total volume
1.3 million gallons
Planned expansion: + 780,000 gallons
Generating capacity
> 150 MW
Make-up water
Softened public water
Approx. 208,000 gallons/year
Client challenge
Treated conventionally, with a base of phosphate/sulfites, the networks ended up heavily clogged:
- Magnetizable suspended matter + deposits
- Significant signs of corrosion (iron): > 60 ppm
- Difficulty maintaining stable parameters in the circuit (mineral conditioning with PO4/SO32, in particular)
- Contaminated with sulfate-reducing bacteria (SRB).
Given the substantial deviations reported and the criticality of the circuit, the strategy in place needed to be reassessed.
An eco-friendly final solution was necessary.
ODYSSEE’s solution
- Permanent stoppage of phosphate-based products
- Gradual application of ODYTHERM FS510P, according to a switchover protocol designed in combination with in-line ODYNET/ODYCLEAR filters
- ODYTHERM FS510P: a formula containing only organic active agents (film-forming amines)
- Installation of a protective continuous monomolecular film mediating between the circuit’s components and the circulating liquid, to prevent corrosion
- Improved heat transfers (clean surfaces)
- Passivation of matter (pH 9-10)
Results
Corrosion
Sharp drops in iron content, ending with values of < 0.05 ppm.
Suspended matter
Gradual clarification of water.
Bacterial contamination control
Disappearance of SRB – no recontamination (and no added biocide).
