Low NOx retrofitting project of 29 MW gas boilers

    Takes a low NOx retrofitting project of 29 MW gas boilers in Beijing as an example, briefly presents the flue gas recirculation and SCR technologies, and elaborates the installation of flue gas recirculation system， burner reformation, selection basis of reducing agent and catalyst for SCR system. Based on the environmental monitoring flue gas emission data, points out that low nitrogen burner and flue gas recirculation technology can be used as the main control technology of NOx in gas boilers at present, and the application of SCR technology can meet lower NOx emission requirements at high load of boiler.