Preventing tube failure in boilers
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United States of America Patent
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Apr 24, 2018
Issued Date -
N/A
app pub date -
Jul 26, 2013
filing date -
Jun 6, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The erosion-prone sections of the tubes in a circulating fluidized bed boiler are provided with a locally thickened sidewall without forming discontinuities on the outer surface of the tubes. This can be accomplished, for example, by replacing the erosion prone portion of the tube with a section having a smaller inside diameter, but the same outside diameter, or by replacing the erosion prone portion of the tube with a section having a thicker sidewall, but the same inside diameter, and smoothing over the outside discontinuity with an alloy coating. A useful alloy coating is also disclosed which can be used for this and other applications.
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International Classification(s)
- C23C:COATING METALLIC MATERIAL; COATING MATERIAL WITH M....
- B05D:PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MAT....
- B23K:SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLA....
- F23M:CONSTRUCTIONAL DETAILS OF COMBUSTION CHAMBERS, NOT....
- F28F:DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATU....
- F22B:METHODS OF STEAM GENERATION; STEAM BOILERS
- F23C:METHODS OR APPARATUS FOR COMBUSTION USING FLUENT F....
- B32B:LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA....
- C22C:ALLOYS
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