基于PCS7的湿气检定装置设计与实现

发布时间：2018-04-27 11:09

本文选题：PCS7 + 正压法　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：湿气在天然气生产过程中有很大的影响,由于油气生产过程中必然伴随着液相和气相的混合,因此需要对湿气的流量计量进行研究,分析液相的存在对于气体流量计的气体计量准确的影响。气体流量计在湿气环境下的计量标定需要一个检定试验装置,可以利用临界流音速喷嘴计量检定的方法对气体流量计进行湿气环境下的计量标定。本课题主要是研制湿气检定装置,因而重点提出了湿气检定装置的整体设计方案和具体分系统的实现方案。首先整体设计方案设计分析了系统的构成,各个分系统的实现方案和相应指标,湿气检定系统由稳压气路,音速喷嘴校准器,高压雾化混合和湿气输出组成。其次是分析了临界流音速喷嘴检定气体流量计的理论和稳压罐体的数学模型,为后期检定软件设计和稳压罐体的压力控制提供理论依据。再次详细描述了PCS7集散控制系统的软硬件实现的过程,对气体回路进行实时监控,远程监控各设备的运行状态,同时PCS7全集成系统实现湿气环境下对待检仪表的检定,记录相关数据依据各型号的仪表检定规程得出相应的检定报告。最后对进入音速喷嘴的上游的气源压力的稳压效果进行现场测试,验证了减压阀和稳压罐体联合作用的稳压效果,同时对湿气加湿量的稳态过程进行仿真,为后期湿气加湿硬件实现奠定基础。
[Abstract]:The wet gas has a great influence in the natural gas production process. Because the mixture of liquid and gas is inevitable in the process of oil and gas production, it is necessary to study the flow measurement of wet gas. The influence of liquid phase on gas measurement of gas Flowmeter is analyzed. The calibration of gas Flowmeter in wet gas environment requires a calibration test device, and it can be calibrated in wet environment by using the method of critical flow sonic nozzle measurement and calibration. The main task of this paper is to develop the wet gas verification device, so the whole design scheme of the wet gas verification device and the realization scheme of the concrete sub-system are put forward. Firstly, the whole design scheme is designed and analyzed. The system is composed of steady pressure gas path, sonic nozzle calibrator, high pressure atomization mixing and moisture output. Secondly, the theory of critical flow nozzle calibration gas Flowmeter and the mathematical model of steady pressure tank are analyzed, which provides the theoretical basis for the later verification software design and the pressure control of steady pressure tank. The software and hardware realization of PCS7 distributed control system is described in detail again. The real-time monitoring of gas loop and the remote monitoring of the running state of each equipment are carried out. At the same time, the PCS7 integrated system realizes the verification of the inspection instrument under the wet gas environment. Record relevant data according to each type of instrument verification regulation to obtain the corresponding verification report. Finally, the steady pressure effect of the upstream gas source pressure entering the sonic nozzle is tested on the spot, which verifies the stabilizing effect of the combined action of the pressure reducing valve and the steady pressure tank. At the same time, the steady state process of the wet gas humidification is simulated. Lay the foundation for the later wet air humidification hardware realization.
【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】：TE967

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