ABSTRACT: Increases in recovery boiler firing capacity can often be achieved through upgrade of the air and liquor delivery systems to achieve improved combustion. These increases can be achieved without pressure part modification of the convective sections of the boiler. Other benefits, such as reduced water wash frequency, reduced TRS emissions, and improved reduction efficiency, are also possible through combustion improvements. Means of accomplishing improved combustion in recovery boilers has been an area of intense interest over the past few years as recovery boiler capacity has limited mill expansion efforts.
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