Furnaces – Process – Treating fuel constituent or combustion product
Reexamination Certificate
2006-10-12
2010-12-07
Rinehart, Kenneth B (Department: 3743)
Furnaces
Process
Treating fuel constituent or combustion product
C431S003000, C432S002000
Reexamination Certificate
active
07845292
ABSTRACT:
A slag and corrosion control process is described. The process entails: identifying the location of at least one slagging problem area in a boiler; introducing a slag control chemical comprising magnesium oxide or hydroxide into combustion gases in a location identified as having a slagging problem; identifying the location of at least one corrosion problem area in a boiler; and introducing a corrosion control chemical comprising a sulfate salt, bisulfite salt, sulfuric acid, or sulfur into combustion gases in a location identified as having a corrosion problem. In operation, these slag deposits will be sufficiently friable to be removed by relatively moderate application of physical energy, thus saving time and reducing any damage to the tubes by the cleaning process. The slag deposits are less voluminous and less in weight and are removed quickly. It is an advantage of the invention that slag can be removed with little or no shut down of a boiler.
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Bohlen Scott K.
Brewer Glenn
Martin J. David
Schulz Kent W.
Smyrniotis Christopher R.
Carvis Thaddius J.
Fuel Tech Inc.
Laux David J
Rinehart Kenneth B
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