旋转容积式流量计在天然气计量中的应用  

The application of rotational positive displacement flowmeter in natural gas metering

作　　者：商同林[1] 张树华[1] 

机构地区：[1]中国石化胜利油田分公司河口采油厂,山东东营257200

出　　处：《油气储运》2011年第1期63-66,7,共4页Oil & Gas Storage and Transportation

摘　　要：在国内的天然气贸易计量中,广泛使用旋转容积式流量计。基于测量原理,给出了在操作条件下,计量流量介于分界流量qt和最大流量qmax之间,流量计的最大允许误差,以及分界流量qt与流量计量程比的对应关系。基于相关国家标准,提出了流量计在外观、防腐、防爆、检验、配置等方面的技术要求,论述了流量计的使用环境、安装要求、相关配置、投运流程及维护和检定程序,罗列了体积流量、质量流量和能量流量的计算方法,以及各种流量和相关参数测量不确定度的估算方法。对如何提高天然气计量的准确性和可靠性进行了有益的探讨。Rotational positive displacement flowmeter is widely used in domestic natural gas trade. The authors consider that based on the measurement principle,the metered flowrate in operation condition is between the transitional flowrate qt and the maximum flowrate qmax. In this paper,the maximum allowed error in flowmeter and the corresponding relationship between the transitional flowrate and the range are analyzed. In accordance with relevant national standards,the technical requirements on flowmeter in appearance,anticorrosion,anti-explosion,checking and configuration are presented. Besides,the paper describes the operation condition,installation requirement,relevant configuration,start-up procedure and maintenance and calibration regulation,and provides the calculation methods about volume flowrate,mass flowrate and energy flowrate. Also,it explains the flowrates and the estimation method of relevant parameters’ uncertainty. The topic about how to enhance the accuracy and stability of natural gas metering is also discussed.

关 键 词：旋转容积式流量计 天然气 计量 原理 技术要求 流量 计算 不确定度 

分 类 号：TE89[石油与天然气工程—油气储运工程]