天然气流量计量标准装置的工艺流程优化
发布时间：2018-08-31 17:45
【摘要】：天然气计量标准工艺流程管件设备种类繁多、影响因素复杂,对计量标准装置计量性能的影响往往会在投产运行之后才逐渐显现,整改难度极大。因此,在建设初期科学优化流量计量标准装置的工艺流程,可有效提升其准确度。为此,提出了通过流体力学三维模拟仿真技术(FLUENT)优化高压大流量天然气计量标准装置工艺流程的方法。采用该方法可为天然气计量标准装置工作提供流态稳定的天然气介质,消除管道震动和噪音对计量标准装置计量性能的影响,进而提高天然气流量计量的准确度。同时,以管道弯头、整流器等典型工艺管件为例,通过建模和模拟计算,对不同工况条件下管道内流场进行分析,得出了流场分布规律。研究结果表明:①在检定工艺流程的标准支路与检定支路上游增加汇管,可减轻上游弯管对下游流态的影响;②在被检流量计及核查超声流量计上游10d处安装整流器,能够减小流态对计量结果的影响、提高计量标准装置的准确度。结论认为,该方法在国家石油天然气大流量计量站武汉分站工作级标准装置建设和工艺流程优化中得到了应用,经考核,工作级标准装置测量不确定度为0.29%(k=2),达到国内先进水平。
[Abstract]:There are many kinds of pipe fittings for natural gas metering standard process flow and complex influencing factors. The influence on metering performance of the metering standard device will appear gradually after it is put into operation, so it is very difficult to rectify and reform. Therefore, in the initial stage of construction, scientific optimization of the flow measurement standard device process, can effectively improve its accuracy. In this paper, a method of optimizing the process flow of high pressure and large flow natural gas metering standard device by (FLUENT) is put forward. This method can provide stable medium for natural gas metering standard device, eliminate the influence of pipeline vibration and noise on metering performance, and improve the accuracy of natural gas Flowmeter. At the same time, taking typical pipe fittings such as pipe elbows and rectifiers as examples, through modeling and simulating calculation, the flow field in pipeline under different working conditions is analyzed, and the distribution law of flow field is obtained. The results show that the addition of sink tube to the standard branch and upstream of the verification branch of the verification process can reduce the influence of the upstream elbow on the downstream flow state. The rectifier can be installed at the upstream of the detected Flowmeter and the verified ultrasonic Flowmeter for 10 days. It can reduce the influence of the flow state on the measurement results and improve the accuracy of the metering standard device. The conclusion is that this method has been applied in the construction of the working grade standard device and the optimization of the technological process of the Wuhan branch station of the national oil and natural gas large flow measurement station. The uncertainty of the working grade standard device is 0.29% (km2), which reaches the advanced level in China.
【作者单位】： 西南石油大学;中国石化天然气分公司;
【分类号】：TE863.1
本文编号：2215708
[Abstract]:There are many kinds of pipe fittings for natural gas metering standard process flow and complex influencing factors. The influence on metering performance of the metering standard device will appear gradually after it is put into operation, so it is very difficult to rectify and reform. Therefore, in the initial stage of construction, scientific optimization of the flow measurement standard device process, can effectively improve its accuracy. In this paper, a method of optimizing the process flow of high pressure and large flow natural gas metering standard device by (FLUENT) is put forward. This method can provide stable medium for natural gas metering standard device, eliminate the influence of pipeline vibration and noise on metering performance, and improve the accuracy of natural gas Flowmeter. At the same time, taking typical pipe fittings such as pipe elbows and rectifiers as examples, through modeling and simulating calculation, the flow field in pipeline under different working conditions is analyzed, and the distribution law of flow field is obtained. The results show that the addition of sink tube to the standard branch and upstream of the verification branch of the verification process can reduce the influence of the upstream elbow on the downstream flow state. The rectifier can be installed at the upstream of the detected Flowmeter and the verified ultrasonic Flowmeter for 10 days. It can reduce the influence of the flow state on the measurement results and improve the accuracy of the metering standard device. The conclusion is that this method has been applied in the construction of the working grade standard device and the optimization of the technological process of the Wuhan branch station of the national oil and natural gas large flow measurement station. The uncertainty of the working grade standard device is 0.29% (km2), which reaches the advanced level in China.
【作者单位】： 西南石油大学;中国石化天然气分公司;
【分类号】：TE863.1
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相关硕士学位论文 前1条
1 田艳辉;武汉分站移动式天然气计量标准装置建设项目风险管理研究[D];山东大学;2016年
，本文编号：2215708
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