Steam Turbine Fouling
Steam Turbine Fouling
(OP)
Dear Eng-Tips'er,
We have problems with our turbine in RCC unit. The steam flow to the turbine is decreasing everyday eventhough the governor has been kept in manual at maximum opening. The turbine is driven by steam produced in RCC catalyst cooler and RCC CO Boiler. Base on the lab result, the quality of steam is pretty good most of the time only one or two occasion when the steam quality is off (usually silica. the spec is < 0.02 ppm but sometime the silica in steam could reach 0.05 ppm). Last month , we cleaned the turbine and checked the deposit on the turbine blade. The deposit predominantly Phosphate, Silicate, Fe, and Al. Now, we already run the turbine but the performance is drop again. The steam quality seems pretty good. My question is
1. Does anyone know, where the Al in steam come from?
2. Does anyone have some clue where I can find literature on how deposit can be built up in steam turbine?
3. Is it true that once the deposit is built up in the turbine blade, we cannot preven the deposition eventhough the steam quality has already recovered?
4. Does anyone has experience with inline cleaning of steam turbine?
Thank you for your help
We have problems with our turbine in RCC unit. The steam flow to the turbine is decreasing everyday eventhough the governor has been kept in manual at maximum opening. The turbine is driven by steam produced in RCC catalyst cooler and RCC CO Boiler. Base on the lab result, the quality of steam is pretty good most of the time only one or two occasion when the steam quality is off (usually silica. the spec is < 0.02 ppm but sometime the silica in steam could reach 0.05 ppm). Last month , we cleaned the turbine and checked the deposit on the turbine blade. The deposit predominantly Phosphate, Silicate, Fe, and Al. Now, we already run the turbine but the performance is drop again. The steam quality seems pretty good. My question is
1. Does anyone know, where the Al in steam come from?
2. Does anyone have some clue where I can find literature on how deposit can be built up in steam turbine?
3. Is it true that once the deposit is built up in the turbine blade, we cannot preven the deposition eventhough the steam quality has already recovered?
4. Does anyone has experience with inline cleaning of steam turbine?
Thank you for your help





RE: Steam Turbine Fouling
If you try to do on line cleaning without technical support from the representative then you risk wrecking your turbine, causing a accident, or worse.
best wishes,
sshep