Analysis and countermeasures of excessive CO content in heating furnace of aviation kerosene hydrogenation unit
The problem of CO exceeding the stan-dard was analyzed during the operation of the heating furnace in the aviation kerosene hydrogenation unit of a petrochemical company,and improvement mea-sure was proposed.On the basis of not changing the burner body,a fuel staged low nitrogen and low CO burner was designed by online modification of the fuel gas gun.The results showed that the main rea-sons for the generation of a large amount of CO dur-ing the operation of the heating furnace were the low furnace temperature,large fluctuations in the actual heat load of the burner,and limitations in the burner structure.According to Computational Fluid Dynam-ics(CFD)simulation,the maximum combustion temperature at the center of the modified burner flame was 1 364.18℃,which was lower than the temperature(above 1 450℃)where a large amount of NOx was generated.The mass concentrations of NOx and CO emissions were 35.00 and 26.45 mg/m3,respectively.The modified burner could adjust the combustion load of two sets of fuel gas guns through fuel premixed coupling fuel staged combustion,making the flame combustion more completely.The mass concentration of CO in the total flue gas of the heating furnace had decreased from the highest 1 262 mg/m3 before the modification to the lowest 18.00 mg/m3.At the same time,pollutants such as NOx and SO2 in the flue gas were far below the emis-sion standard.
aviation kerosene hydrogenationheating furnaceburnerCO contentnitrogen ox-ideemission standard
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维普
