Abstract:This paper points out that even if a certain power plant with supercritical unit meets the requirements of NOx emission, the NOx desorption can still be a big problem, which need to be upgraded. According to coal property and power plant’s actual situation, it is suggested to transform the combustor and add selective catalytic reduction system. Mass concentration of NOx emission is below 50mg/m3 after the transformation, which not only meet the requirements of emission standard, but also lower the cost of NOx desorption.

Keywords:fire coal, NOx, selective non catalytic reduction, selective catalytic reduction, denitration, ultra low emission, supercritical unit