对武汉石化厂蒸汽流量测量准确度问题的分析

Analysis on Accuracy of Vapor Flowrate Metering at Wuhan Petrochemical Factory

针对蒸汽流量测量不准确的问题,结合武汉石化厂已有的蒸汽流量测量手段和蒸汽密度计算方法,分析了影响蒸汽流量测量的主要因素及原因,提出了提高蒸汽流量测量准确度的改进措施,包括:节流元件改用标准喷嘴,节流装置整套加工,采用正确的公式计算蒸汽密度,合理选用量程。武汉石化厂蒸汽流量仪表改造后,蒸汽计量误差显著减小,效果比较理想。

Combined with vapor flowrate metering means available at Wuhan Petrochemical Factory and the vapor density calculation method used, the main factors and reasons affecting vapor flowrate metering are analyzed. The improvement measures to raise the metering accuracy are put forward including substituting standard nozzle for throttle component, fabricating throttle equipment in a complete set, using correct formulas to calculate vapor density and choosing reasonable measuring range. The vapor flowrate apparatus at Wuhan Petrochemical Factory has been reformed and the metering error has been reduced significantly.