安装条件对在线监测流量计测量性能的影响
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摘要
针对加油站油气回收在线监测流量计易堵塞、准确度低等问题,设计模拟试验,对现场使用较为广泛的流量计进行测试,定量研究安装方式、安装位置和真空泵类型对仪表测量精度的影响。结果表明:安装位置对流量计测量精度影响较大,泵前流量计测量值需进行压力和温度系数修正;流量计水平或竖直安装时测量误差很小,小于0.1L;真空泵产生的真空度越小,流量计的测量误差也越小。
In view of the easily-blocked and low accuracy of the online monitoring flowmeter in gas station,a simulation experiment on widely-used flowmeters was implemented and a quantitative study on their installation and installation location as well as vacuum pumps type's influence on their measurement accuracy were discussed. Results show that the installation location can influence measurement accuracy much and the measured value of the flowmeter installed before pumps has to receive the correction of pressure and temperature coefficients; and the measuring errors of horizontally or vertically-installed flowmeters are less than 0. 1L; the smaller vacuum degree of the pump can bring about a smaller measuring error in the flowmeter.
In view of the easily-blocked and low accuracy of the online monitoring flowmeter in gas station,a simulation experiment on widely-used flowmeters was implemented and a quantitative study on their installation and installation location as well as vacuum pumps type's influence on their measurement accuracy were discussed. Results show that the installation location can influence measurement accuracy much and the measured value of the flowmeter installed before pumps has to receive the correction of pressure and temperature coefficients; and the measuring errors of horizontally or vertically-installed flowmeters are less than 0. 1L; the smaller vacuum degree of the pump can bring about a smaller measuring error in the flowmeter.
引文
[1]GB 20952-2007,加油站大气污染物排放标准[S].北京:中国环境科学出版社,2007.
[2]汪颖.浅谈气体罗茨流量计与气体涡轮流量计在设计中的选型[J].上海煤气,2009,(5):12~13.
[3]郑建梅,梁永超,张伟伟,等.对气体涡轮流量计仪表系数稳定性的分析[J].城市燃气,2007,(4):9~11.
[4]刘明,刘敦利,王杰.气体罗茨流量计仪表系数的稳定性研究[J].工业计量,2015,25(1):63~65.
[5]孙晓东.气体涡轮流量计安装使用[J].自动化与仪器仪表,2009,(1):83~85.
[6]项银杰,孙志强,张宏建.涡街流量计安装方式对其测量性能的影响[J].电站系统工程,2007,23(2):57~58.
[7]王振中,金帼,吴锋棒,等.加油站油气回收在线监控系统[J].化工自动化及仪表,2014,41(10):1166~1168.
[8]孟振振,吴锋棒,张卫华.加油站油气回收在线监测系统[J].化工自动化及仪表,2012,39(11):1511~1514.
[9]陆建华.浅谈气体流量测量中的温度及压力补偿[J].化工自动化及仪表,2011,38(4):488~491.
[2]汪颖.浅谈气体罗茨流量计与气体涡轮流量计在设计中的选型[J].上海煤气,2009,(5):12~13.
[3]郑建梅,梁永超,张伟伟,等.对气体涡轮流量计仪表系数稳定性的分析[J].城市燃气,2007,(4):9~11.
[4]刘明,刘敦利,王杰.气体罗茨流量计仪表系数的稳定性研究[J].工业计量,2015,25(1):63~65.
[5]孙晓东.气体涡轮流量计安装使用[J].自动化与仪器仪表,2009,(1):83~85.
[6]项银杰,孙志强,张宏建.涡街流量计安装方式对其测量性能的影响[J].电站系统工程,2007,23(2):57~58.
[7]王振中,金帼,吴锋棒,等.加油站油气回收在线监控系统[J].化工自动化及仪表,2014,41(10):1166~1168.
[8]孟振振,吴锋棒,张卫华.加油站油气回收在线监测系统[J].化工自动化及仪表,2012,39(11):1511~1514.
[9]陆建华.浅谈气体流量测量中的温度及压力补偿[J].化工自动化及仪表,2011,38(4):488~491.