Low-medium temperature application of selective catalytic reduction denitration in cement flue gas through a pilot plant

Low-medium temperature application of selective catalytic reduction (SCR) denitration in cement flue gas was established and investigated this study. The 2000 h continuous operation shows the concentration NOx at outlet can be maintained 24 mg/Nm3 on average, while due to increase SO2 gas, increased 57.5 after long time operation. sulfur deposition is main reason for catalyst deactivation, still a big obstacle low-medium SCR gas. efficiency tested as fluctuated from 73.5% 86.2%, ammonia high 22.5–60.0 excessive injection non-catalytic (SNCR), serious escape problem SNCR, potential hybrid SNCR-SCR technology. In order maintain above 85.0%, gaseous hourly space velocity (GHSV) should not exceeded 2800 h?1, electrostatic precipitators (ESP) setting 60 kV relatively appropriate, kept 200 °C. concentrations toxic equivalent quantities (TEQs) PCDD/Fs congeners raised greatly reactor, indicating concerned during SCR, especially waste co-disposal processes.