Experimental Study On The Selective Non-catalytic Reduction

China’s energy resources characteristic is rich in coal, lean oil, natural gas. Because of China’s coal reserves, and coal in China’s primary energy consumption occupies the absolute proportion is as high as70%, much higher than the global average of28%coal consumption. In the future for a long period of time, coal is still the main source of energy.But coal will produce large amounts of nitrogen oxides, nitrogen oxides can cause harms to human body and the environment. SNCR technology is using the reducing agent in high temperature of900～1100℃, redox reaction with the NOx, to achieve the purpose of removing NOx.I use the different normalized stoichiometric ratios NSR, temperatures and oxygen concentrations sa the basis of experimental study of SNCR. I use Themal DeNOx system and NOxOUT system experimental to study SNCR, NSR, temperature and oxygen concentration on NH3escaping, HNCO escaping, concentration of N2O, N2conversion rate.I also study in various oxidation additives on SNCR. It mainly studies CH3OH, H2O2, HCOOH, CH3COCH3as additives on the impact of urea-SNCR process.They can decrease the temperature of SNCR and decrease the denitration rate.From studying the hybrid SNCR/SCR denitration experimental, I know SNCR/SCR combined denitration can greatly improve low temperature SNCR process denitration efficiency, and can reduce the escape of NH3, HNCO in the catalyst under the effect of solution NH3and CO2; greatly improves the low temperature urea reductant utilization. I also study in various oxidation additives on hybrid SNCR/SCR. I mainly studies CH3OH, H2O2, HCOOH, CH3COCH3as additives on the impact of hybrid SNCR/SCR process. They can decrease the temperature of SNCR and decrease the denitration rate, NO2is also decreased.