Method and apparatus for sootblowing recovery boiler
AssigneeMetso Automation Oy
InventorsJukka Koskinen, Mikko Leskinen, Jaakko Hanhinen
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Abstract
A method and apparatus for sootblowing a recovery boiler. Sootblowers of the recovery boiler are divided into sootblowing groups, and a sootblowing interval is determined for the sootblowers. A fouling index is produced for each sootblowing group of the recovery boiler, and relative frequency values are calculated.
Claims12
A method for sootblowing a recovery boiler, comprising
- dividing sootblowers of the recovery boiler into sootblowing groups, producing a fouling index for each sootblowing group of the recovery boiler,
- determining sootblower-specific sootblowing intervals,
- calculating relative frequency values of the sootblowing groups,
- selecting, for sootblowing, the sootblowing group and the sootblower such that the sootblowing takes place substantially according to the relative frequency values and the sootblower-specific sootblowing intervals.
A sootblowing apparatus for a recovery boiler, the apparatus comprising sootblowers arranged in sootblowing groups in the recovery boiler, each sootblowing group having a fouling index, and a control apparatus, wherein the control apparatus comprises:
- means for determining sootblower-specific sootblowing intervals,
- means for calculating relative frequency values for the sootblowing groups, and
- means for selecting, for sootblowing, the sootblowing group and the sootblower such that the sootblowing takes place substantially according to the relative frequency values and the sootblower-specific sootblowing intervals.
Dependencies are inferred from the claim text.