关键词: 水煤浆锅炉, 烟气脱硝, 选择性催化还原法

Abstract: According to the characteristics of 220 t/h coal water mixture-boiler flue gas and the demand of denitrification，Beijing Yanshan Branch Company of SINOPEC has chosen the selected catalytic reduction (SCR) technology for denitrification. The authors determined the process and design parameters by comparing different denitrification methods. The operating temperature of SCR reactor should be controlled in the range of 320—370 ℃，the volume ratio of ammonia and air should be about 5∶95，SO2 conversion ratio should be less than 1% and pressure drop should be less than 1000 Pa in the SCR reaction zone. At the same time，the concentration of NH3 in treated flue gas should be less than 3%. After construction，commissioning and testing，the denitrification effect of this project has achieved the standards prescribed by the local environmental department in Beijing. This project also has very important significance for combining foreign technology and domestic flue gas denitrification of large CWM-boiler.

Key words: coal water mixture-boiler, flue gas denitrification, selective catalytic reduction