摘要
针对干气、驰放气、火炬气等类型的气体组分变化快的特性,易引起标准状态下密度不稳定的问题,无法像稳定的气体那样,采用温度压力补偿的方法完成质量流量的测量。采用涡街流量传感器测量该种气体工况条件下的体积流量,再用旋涡发生体前后的压差,计算工况条件下的流体密度,并在正压法空气流量标准装置上进行全量程范围内质量流量校准,达到±0.5%MV准确度。现场运行证明:该方法简单可靠,成本比科氏力质量流量计方法低很多。
Aiming at the characteristic of fast variation of component in dry gas,purge gas and flare gas,and the problem of easily causing gas density unstable under standard status,temperature-pressure compensation method for stable gas can＇t be adopted to realize the mass flow-rate measurement.Vortex flow-rate sensor is applied to measure variable component gas volume flow under operation condition,gas density is calculated with applying differential pressure of front and rear vortex occurrence body.The mass flow is calibrated in the full range in a positive pressure method gas flow standard device.The accuracy achieves ±0.5% MV.Field application proves the technology is simple and reliable.The cost is much lower than that for Coriolis mass flowmeter.
作者
宋文其
叶明
余厚林
马瑞民
纪波峰
纪纲
Song Wenqi;Ye Ming;Yu Houlin;Ma Ruimin;Ji Bofeng;Ji Gang(Yangzi Petrochemical Co.Ltd.,Nanjing,210048,China;China Petroleum Offshore Engineering Co.Ltd.,Tianjin,300270,China;Shanghai Tontion Automation Instrumentation Co.Ltd.,Shanghai,200070,China)
出处
《石油化工自动化》
CAS
2018年第4期64-67,共4页
Automation in Petro-chemical Industry
关键词
变组分气体
质量流量
CMF方法
涡街-差压方法
准确度验证
密度
variable component gas
mass flow
CMF method
vortex differential pressure method
accuracy verification
density
