基于NI PXI平台的天然气流量计量装置的研制

发布时间：2018-11-02 06:58

【摘要】：在天然气的储运和输送过程中,天然气流转主要是通过管道进行输送,在输送过程中,天然气的计量80%以上是通过智能孔板流量计进行计量。因此天然气智能孔板流量计检定的准确程度会对天然气最终计量产生极大的影响,天然气流量计量检定的准确程度对天然气加工生成及流转等各个环节都有着重大的作用。实现天然气孔板流量计的在线实时检定具有重大现实意义。本课题以满足油田实际生产过程中的天然气现场实时计量为背景,为油田天然气的在线实时检测为目的,研发了天然气流量计量装置。本篇论文简要介绍了所研发内容的背景和需求,及国内外对天然气计量的研究发展情况,并以大庆油田实际需求为根本,确定了该项目研究主要内容。根据相关的规程及计算方法依据具体分析产品的主要功能参数,及实现该参数的主要方法依据,提出了该装置的总体研究方向及相应的实现方法,以NI PXI为设计平台,对天然气流量计量装置进行了便携式设计研发,给出了实现的具体方法。按照实际功能需求,天然气计量装置平台实现了对标准孔板、智能变送器结合的天然气计量一次仪表的数据采集和现场工况条件下天然气的标准天然气压缩因子、体积流量的实时计算。整个计量装置由上位机界面,下位机实时RT硬件系统,数据采集卡组成。软件平台实现了手动设置现场天然气的状态参数,对天然气流量的实时记录,压缩因子和计算流量值的实时计算,完成对数据的记录,数据库的本地存储和远程Oracle数据库的远端上传。
[Abstract]:In the process of storage and transportation of natural gas, the flow of natural gas is mainly carried out through pipeline. In the course of transportation, more than 80% of the measurement of natural gas is measured by intelligent orifice Flowmeter. Therefore, the accuracy of natural gas intelligent orifice Flowmeter will have a great impact on the final measurement of natural gas, and the accuracy of natural gas flow measurement and verification plays an important role in the production and flow of natural gas. It is of great practical significance to realize on-line real-time verification of natural gas orifice Flowmeter. In order to satisfy the real time measurement of natural gas in oil field, and for the purpose of on-line real time detection of natural gas in oil field, a natural gas flow metering device is developed in this paper. This paper briefly introduces the background and demand of the research and development of natural gas measurement at home and abroad, and determines the main research content of the project based on the actual demand of Daqing Oilfield. According to the related rules and calculation methods, the main functional parameters of the product and the main method to realize the parameters are analyzed, and the overall research direction and the corresponding implementation method of the device are put forward. The design platform is NI PXI. The portable design and development of natural gas flow metering device are carried out, and the realization method is given. According to the actual function demand, the natural gas metering device platform realizes the data acquisition of the natural gas metering primary instrument combined with the standard orifice plate and the intelligent transmitter and the standard natural gas compression factor under the field working conditions. Real-time calculation of volume flow. The whole metering device consists of upper computer interface, real-time RT hardware system and data acquisition card. The software platform realizes the manual setting of the state parameters of natural gas in the field, the real-time recording of the natural gas flow, the real-time calculation of the compression factor and the calculated flow value, and the completion of the recording of the data. Local storage of the database and remote upload of the remote Oracle database.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH814

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