CASE STUDY DRY AIR PROTECTION FOR A SCHEDULED OUTAGE BACKGROUND Equipment installed at this plant is a Foster-Wheeler design with a capacity of 500 MW and a drum-type, natural-circu- lation coal-fired boiler. The unit was brought on line in the early 1970s. In 1993, the unit was taken off line for a nine-month scheduled outage. The main purpose of the outage was to increase the size of the precipitator, which improves particulate removal and co

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