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在成品油零售计量中,一般采用体积流量与密度测试的方法,冉经过计算求得质量。由于体积与密度测试受多种因素的影响,误差很大。若采用质量流量计则不受这些因素的影响,并可提高计量精度。介绍了石家庄炼油厂引进德国生产的E+H质量流量计的使用情况,从流量计安装、使用、量程和工作环境等方面分析了使用中出现的问题。测量传感器的最佳安装方式应为垂直式,若为水平安装,其出口段必须有1～2m的直管段,且维持20kPa的表压。通过流量计的油品如果发生汽化,将引起较大的计量误差,为此要提高流量计的背压、减少油品汽化以及减少流量计振动。
Retail oil metering, the general method of using volume flow and density testing, calculated by the quality of Ran. Due to the volume and density test by a variety of factors, the error is large. If the use of mass flow meter is not affected by these factors, and can improve the measurement accuracy. The introduction of the use of E + H mass flow meter produced in Germany by Shijiazhuang refinery was introduced. The problems in use were analyzed from aspects of flow meter installation, use, measuring range and working environment. The best installation of the measuring sensor should be vertical, if the level of installation, the outlet section must have 1 ~ 2m of straight pipe, and maintain 20kPa gauge pressure. If the oil through the flow meter vaporization, will cause a large measurement error, to increase the back pressure of the flow meter to reduce oil vaporization and reduce flow meter vibration.