运用CS3000系统顺控SFC模块将储罐液位测量值换算成罐出口流量值  

Using CS 3000 System Sequence Control SFCSW Module to Achieve Flow Measure

作　　者：黄军政 石辉峰 兰师 王皓 Huang Junzheng;Shi Huifeng;Lan Shi;Wang Hao(Petrochina's Dushanzi Petrochemical Branch Corp of Ethylene Plant Instrument Workshop,Xinjiang Uygur Autonomous Region,Karamay,833600,China)

机构地区：[1]新疆石油独山子石化分公司信息网络公司乙烯仪表车间,新疆维吾尔自治区克拉玛依833600

出　　处：《仪器仪表用户》2021年第2期42-44,41,共4页Instrumentation

摘　　要：本文介绍了独山子300万吨国储罐区仪表技术人员应工艺要求,为了提高储备油品的计量精度,根据储油罐液位值换算出储罐净流入(或净流出)流量,并在DCS完成流量软表的组态和显示的全过程。详细给出了运用SFCSW顺序控制模块编程功能的步骤,介绍了实现液位换算成流量的运算机理以及编程代码。最后,从实际操作人员的视角给出了判断该流量值为净流入量还是净流出量的依据和方法。表现出SFCSW顺序控制模块在实现非常规、多视角工艺测量及控制要求方面的巨大潜力,尤其凸显出编程人员运用数组概念实现无限循环计算的创造性。展示了将仪表测量技术、计算机集散控制系统、数学概念相互结合运用后的综合效果和良好发展的应用前景,对炼油化工工艺人员和仪表人员具有一定的启示作用和推广意义。This paper introduces the process in which instrument technician of Dushanzi 3 million tons national storage tank area convert the net inflow or net outflow of the storage tank according to the liquid level of the storage tank,and complete the configuration and display of the flow soft meter in DCS according to the technical requirements,in order to improve the measuring accuracy of the reserve oil.Provides detailed steps of programming function using SFCSW sequence control module,operation mechanism and programming code of liquid level conversion to flow rate.Finally,the basis and method of determining whether the flow value is net inflow or net outflow are given from the perspective of actual operators.Demonstrates the great potential of the SFCSW sequential control module realizing unconventional and multi-view process measurement and control requirements.in particular,it highlights the creativity of the programmer to use the array concept to realize the infinite loop calculation.it shows the comprehensive effect of instrument measurement technology,computer distributed control system and mathematical concepts combined with each other and the prospect of good development and application.it has certain enlightenment function and popularization significance to refiner and chemical process personnel and instrument personnel.

关 键 词：液位 流量 顺控模块 一维数组 

分 类 号：TH865[机械工程—精密仪器及机械]