DESIGN GUIDELINES FOR NH3 INJECTION GRIDS OPTIMIZE SCR NOX REMOVAL

Kenneth J. Fewel, John H. Conroy Peerless Mfg. Co. Dallas Proper ammonia injection grid (AIG) design reduces original equipment costs and operating expenses of selective catalytic reduction (SCR) NOx-removal systems. AIG design is, however, largely neglected in the engineering design stage. Good AIG design reduces costs in several ways: Ammonia- Less will be used in the reduction process. Catalyst-Both original purchase (less catalyst is required with good ammonia Distribution) and

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