Objective The aim is to reduce the pressure drop of the process gas system of the sulfur recovery unit and maintain the long-term operation of the unit.Methods Combined with the process characteristics and calibration conditions of the 100 kt/a sulfur recovery unit with Claus and tail gas purification process,the influencing factors of the system pressure drop of the process gas were found out through the research,calculation and data comparison of the typical equipment and pipeline pressure drop of the unit.Besides,according to the actual production,the influencing factors of the system pressure drop of the process gas were comprehensively analyzed,and the methods and measures to reduce the system pressure drop were proposed.Results The specific pressure drop values of the main equipment and pipeline of the unit were obtained by means of drawing and calculation:(1)The pressure drop of the burner of the reaction furnace was 1.5 kPa.(2)The pressure drop of each heat exchange equipment was about 1.0 kPa,and the total pressure drop of the heat exchange equipment of the process gas system was 6.0 kPa.(3)The calculated pressure drop of the reactor bed was only 74 Pa,which had good low pressure drop performance.(4)The pressure drop of the wet tower of the quench tower packing was 760 Pa,and the pressure drop of the absorption tower packing was 2.3 kPa.(5)The pressure drop of a single wire mesh demister was 164 Pa,and the total pressure drop of the wire mesh demister in the system was 1.1 kPa.(6)The system pressure drop of the process gas pipeline was 3.0 kPa,and the system pressure drop would increase by 15 Pa for each additional 1 m pipeline.The system pressure drop of the process gas was affected by the total flow of process gas,the burner of the reaction furnace,the heat exchange equipment,the reactor,the tower equipment,the wire mesh demister and the system pipeline.Conclusions By improving the raw material properties of the sulfur recovery unit,accurately controlling the air distribution of the sulfur furnace,protecting the catalyst performance of the reactor,and stabilizing the operating conditions of the towers,the system pressure drop of the process gas in the sulfur recovery unit can be maintained at a low level,which can create conditions for the long-term operation of the device.
sulfur recoveryClaustail gas hydrogenationprocess gassystem pressure drop
万方数据
维普
