Case Study: FDG Coatings In Coal Fired Power Plant
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Michigan
Coal Fired Power Plant |
Project Description: The two wet scrubbers were designed and built 30-40 years ago. The FGD system is a 65 MW coal-fired power plant. It is equipped with an electrostatic precipitator and a wet flue gas desulfurization (FGD) system for emission controls. The plant consumes approximately 550 tons of coal per day. The alloy construction of reheat tubes was being attacked by the flue gas after wet scrubbing. The apparent problem is that the coal being burned is high in chlorides- 0.03% by weight resulting in a huge spike (10X) in slurry chlorides around 12000 ppm. The 316 L outlet reheater tubing is showing pitting from chlorides in the flue gas. Internal water temp is 200F in the tubes with external flue gas at 180 F. Steam at 600 F is sparged into the scrubber column below the reheater tubes at scheduled intervals These conditions are similar to conditions experienced in the Jet Bubble Reactors, scrubbers and ductwork made of alloy that are being attacked by high chloride coal burning.
The client was satisfied that the stainless tubes were lined within budget and will extend the life expectancy of the tubes. No significant heat transfer loss has been detected and the scrubber is working at peak performance. ChemLINE
from APC has proved that under the most challenging environments
of heat, corrosion and wear, the ChemLINE polymer will provide long
term solutions to coal burning with chloride contamination of the
flue gas. We welcome discussions from other clients that find that
their alloy construction has had similar corrosive conditions.
For more information please contact: Paul
Turner Email: info@chemicalcontainment.com |
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