石油炼制与脱硫脱硝

DESULFURIZATION AND DENITRIFICATION IN PETROLEUM REFINING

石油炼制过程中产生的硫氧化物和氮氧化物来源于原油中的硫、氮转移和燃烧排放,催化裂化再生烟气和电站锅炉烟气是二氧化硫、氮氧化物主要排放源,电站烟气和催化烟气脱硫脱硝后,二氧化硫和氮氧化物排放浓度均优于排放标准,但《石油炼制工业污染物排放标准》(GB 31570—2015)大幅度收紧了二氧化硫、氮氧化物的排放限值,硫磺回收尾气和加热炉烟气必须采取有效减排措施,才能满足排放要求。

Sulfur oxides and nitrogen oxides produced in petroleum refining process come from sulfur, nitrogen transfer of crude oil and combustion emissions. Flue gas from catalytic cracking regenerator and power plant boiler are the main emission sources for sulfur dioxide and nitrogen oxides. After desulfurization and denitrification of flue gas from power plant and catalytic flue gas,the emission concentration of sulfur dioxide and nitrogen oxides excels the emission standards. With the formal implementation of Emission standard of pollutants for petroleum refining industry,the emission limits for sulfur dioxide and nitrogen oxides are tightened greatly. Thus,effective emission reduction measures must be taken to deal with the tail gas from sulfur recovery and flue gas from heating furnace so as to meet the emission requirements.