孔板流量计清洗期间流量补偿必要性分析  

Necessity Experiment of Flow Compensation for Orifice Flowmeter during Cleaning

作　　者：冉莉 胡守博 苏思睿 蒋文斌 周建禄 Ran Li;Hu Shoubo;Su Sirui;Jiang Wenbin;Zhou Jianlu(Chongqing Division of Petrochina Southwest Oil&Gas Field Company,Chongqing 401331;School of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing 401331;PetroChina Southwest Oil and Gas Field Company Chongqing Kaiyuan Oil and Gas Co.,Ltd.,Chongqing 401331,China)

机构地区：[1]中国石油西南油气田公司重庆气矿,重庆401331 [2]重庆科技学院石油与天然气工程学院,重庆401331 [3]中国石油西南油气田公司重庆凯源石油天然气有限责任公司,重庆401331

出　　处：《广东化工》2023年第6期100-103,107,共5页Guangdong Chemical Industry

摘　　要：现场使用的孔板流量计在孔板清洗时无法计量天然气流量,计量的公平、公正性无法得到保证。实际生产中常通过经验方法进行估算,未引入进行补偿,国家相关标准也未说明是否需要进行流量补偿以及补偿的方法。通过对孔板流量计的工作原理及清洗维护时天然气流态的分析,在现场采用孔板流量计并联和孔板流量计与超声波流量计串联两种方式,对孔板清洗期间的天然气流量进行比对。结果表明全年清洗48次,则估算流量与实际流量相差约3.4×10^(6)m^(3)。结论如下:(1)管道内孔板的存在与否,对管道内天然气流动有较大影响;(2)孔板清洗期间实际流量和经验估算量有较大差值;(3)孔板流量计清洗期间进行流量补偿是必要的。The orifice flowmeter used in the field cannot measure natural gas flow when the orifice is cleaned,and the fairness and impartiality of measurement cannot be guaranteed.In actual production,empirical methods are often used to estimate,and no compensation is introduced.The relevant national standards do not specify whether the flow compensation and compensation methods are needed.Through the analysis of the working principle of the orifice flowmeter and the natural gas flow pattern during the cleaning and maintenance,the natural gas flow during the cleaning of the orifice is compared by using the orifice flowmeter in parallel and the orifice flowmeter and the ultrasonic flowmeter in series.The results show that the difference between estimated flow and actual flow is about 3.4×10^(6) m^(3) after 48 cleanings.The conclusions are as follows.(1)The existence of the orifice plate in the pipeline has a great influence on the natural gas flow in the pipeline.(2)There is a large difference between the actual flow rate and the empirical estimation during the hole plate cleaning.(3)It is necessary to carry out flow compensation during the cleaning of orifice flowmeter.

关 键 词：孔板流量计 清洗期间 天然气 流量补偿 

分 类 号：TQ[化学工程]