Like what you see? Ask us for a full-length preview and pricing options for our entire course catalog
Request full preview
As part of the black liquor combustion process, recovery boilers and smelt dissolving tanks produce pollutants, including, nitric oxide, nitrogen dioxide, carbon monoxide, particulate matter, total reduced sulfur compounds, and sulfur dioxide. All of these pollutants, except particulates, can be monitored by continuous emission monitoring instrumentation. Particulates require manual stack testing. Other gasses, such as the noncondensable gasses, NCGs previously mentioned, may also be directed to and burned in recovery boilers.