关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">生物基脱硝技术, 催化裂化装置, NOx含量, 炉膛温度, 炉膛压力, 锅炉排烟温度, COD, NH3-N

Abstract: The application of non-ammonia bio-based catalyst-free wide-temperature denitrification technology in the flue gas denitrification of the waste heat boiler in a 2.8Mt/a catalytic cracking unit of a certain enterprise is introduced. The denitrification effect of the bio-based denitrification agent was inspected by selecting the same period and similar parameters of the device in 2022 and 2023. The results show that before and after the addition of the agent, the mass concentration of NOx in the flue gas discharged from the catalytic cracking unit was reduced from 150mg/m³ to 56mg/m³, meeting the local flue gas NOx environmental emission requirements; the non-ammonia denitrification aid was sprayed in the furnace chamber of the waste heat boiler, without affecting the furnace chamber temperature (maintained at around 790℃); there was no significant change in the pressure drop and outlet temperature of the waste heat boiler flue gas; the non-ammonia denitrification aid fully reacted with NOx in the furnace chamber of the waste heat boiler, and the COD of the discharged wastewater was 8-25mg/L, and the mass concentration of NH3-N was 0.2-0.7mg/L, meeting the factory control environmental protection indicators. The application effect of bio-based denitrification technology in the flue gas denitrification of the waste heat boiler in the catalytic cracking unit is good, achieving the safe and environmental protection of the enterprise's flue gas denitrification and the stable and long-term production of the device.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">bio-based denitrification technology, FCC unit, NOx content, furnace temperature, furnace pressure, boiler exhaust temperature, COD, NH3-N