gen bank erosion failures bi drum boiler
gen bank erosion failures bi drum boiler
(OP)
All
we run a 35 MWe bi drum boiler that suffers from major tube leaks in the gen bank from what appears to be ash erosion , the failures occur at the base of the mud drum where the tube enters the drum
is the problem due to vortexing around the tubes of ash or is it caused when we soot blow and the ash on the drum literaly grit blasts the tubes away ?
we run a 35 MWe bi drum boiler that suffers from major tube leaks in the gen bank from what appears to be ash erosion , the failures occur at the base of the mud drum where the tube enters the drum
is the problem due to vortexing around the tubes of ash or is it caused when we soot blow and the ash on the drum literaly grit blasts the tubes away ?





RE: gen bank erosion failures bi drum boiler
"When in doubt, always ask the equipment"
RE: gen bank erosion failures bi drum boiler
rmw
RE: gen bank erosion failures bi drum boiler
If damages including thinnings happened on many tubes and they occurred along the same line and at about the same elevation as sootblowing path, then blame the sootblower. The blower lance being too close to tubes, blowing pressure too high, too frequent blowing and combined with ash erosion like you suspected could be the direct reasons. If you do not want to relocate or remove the sootblower or do other things, you can consider adding tube shields and let them face the sootblower lance.
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