The Challenge A Recovery Boiler was first commissioned with a firing capacity of 3.6 million lbs/day Black Liquor Dry Solid (BLDS). The boiler was later upgraded to meet higher black liquor firing demand of 5.16 million lb/day BLDS. With the upgrade, the boiler produces 658,000 lbs/hr high-pressure steam at a pressure of 1,500 psig and a temperature of 829 Fahrenheit. Unfortunately, this higher firing capacity also meant faster deposit buildup and tougher deposit removal. To prevent massive deposit accumulation and costly unscheduled shutdown due to the plugging of the gas passes, the old conventional sootblower system had to be operated beyond its normal parameters of operation. The sootblowers consumed 33,500 lbs/hr on average of valuable high- pressure steam. With the cost o

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