Simultaneous SOx/NOx/Particulate Removal in a High Temperature Baghouse

The SOx-NOx-Rox Box tm (SNRB) process is a Babcock & Wilcox (B&W) patented advanced air pollution control system that provides for significantly reduced SOx, NOx, and particulate emissions from coal-frred boilers. The process utilizes a high-temperature catalytic baghouse for the integration of SOx reduction through the injection of an alkali sorbent such as hydrated lime or sodium bicarbonate. NOx removal through ammonia injection and selective catalytic reduction. and particulate collection. The advantages of the process include: compact integration of the emission control technologies into a single component. dry sorbent and by-product handling. and improved SCR catalyst life due to lowered SOx and particulate levels. Emission control performance of the SNRB concept has been successfully demonstrated in an integrated. 1500 ft3/minute capacity pilot baghouse at B&W's Alliance Research Center. The test results have been used to develop design. performance. and operating specifications for a 5 MWe demonstration facility currently under construction at a commercial utility site. The facility will be used to generate information needed for commercialization of the SNRB technology.