NOx Control Using Quaternary Air-Mill Experience

摘要

Testing was performed at the B&W single dram recovery boiler (PR213) at International Paper in Courtland, AL to measure the influence on Nox of changing air distribution between the units' tertiary and quaternary air ports. On one day of testing, the quaternary air flow was "maximized" and showed a very distinguishable reduction in Nox from the other test conditions collected. This included a comparison to equal amounts of tertiary/quaternary and also maximum tertiary/minimum quaternary. Besides reporting the test results, a comparison is also made between the test values versus B&W prediction curves based on experimental nitrogen conversion standards for Nox from one stage and two-stage combustion at varying amounts of fuel bound nitrogen.