Causes and Control Measures of Nitrogen Oxides in FCC Flue Gas
The 1.4 Mt·a-1 two-stage regeneration process heavy oil catalytic cracking unit of Qingdao Petrochemical Co.,Ltd.was introduced,and the reasons for the increase of nitrogen oxide content in the regeneration mixed flue gas were analyzed.By optimizing the operation of the regeneration system and adding denitration agent,the mass concentration of nitrogen oxide in the mixed flue gas was reduced from 380 mg·m-3 to 150 mg·m-3.The operation severity of downstream denitration device was reduced,and the standard discharge of flue gas was realized.
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