某冶炼厂蒸汽系统调节阀选型设计与仿真研究

发布时间：2018-10-08 15:00

【摘要】：调节阀是控制系统中的关键设备之一。现代工厂的自动控制中,调节阀起着非常重要的作用。针对不同的工艺系统,对调节阀品质的要求也不同。一般来说,对调节阀的研究大多局限在对阀门机械结构的研究,但对于不同型式的调节阀,所使用的系统特性不同,阀门的内部结构不同,且比较复杂,因此不易掌握其工作特性。本文从工艺系统出发,利用仿真手段开展调节阀特性分析和研究,有重要的理论意义和实用价值。本文以某冶炼工厂蒸汽系统原理图为基础,基于流体力学等相关理论,通过推理分析,得出了调节阀和管路系统的数学模型。然后应用大型仿真平台GSE的高精度两相流建模工具JTopmeret进行仿真建模。并针对底层建模技术进行了二次开发,即采用Fortran语言进行手工建模,进一步提高了调节阀模型和管路模型的精度。本文通过对调节阀的仿真建模和试验分析,得到了调节阀工作特性曲线及其流量特性发生畸变的情况,并与理论计算进行对比分析,验证了采用GSE仿真软件进行仿真设计的可行性和可靠性。通过对调节阀流量特性畸变的研究和分析,表明在调节阀在系统中所占压差比例较小时,畸变比较明显,所以在进行调节阀选型设计时,必须要考虑到畸变对阀门流量特性的影响。最后通过对不同的选型设计方案进行的仿真试验和分析,优选出了合理的选型设计方案。
[Abstract]:The control valve is one of the key equipments in the control system. The control valve plays a very important role in the automatic control of modern factories. For different process systems, the quality of the control valve requirements are also different. Generally speaking, the research on the control valve is mostly confined to the mechanical structure of the valve, but for different types of control valve, the characteristics of the system are different, the internal structure of the valve is different, and the valve is more complex. Therefore, it is difficult to master its working characteristics. From the point of view of process system, this paper makes use of simulation method to analyze and study the characteristics of regulating valve, which has important theoretical significance and practical value. Based on the schematic diagram of steam system in a smelting plant and based on the relevant theories such as hydrodynamics, the mathematical models of regulating valve and pipeline system are obtained through reasoning and analysis. Then the high precision two-phase flow modeling tool, JTopmeret, is used to simulate and model the large scale simulation platform GSE. The secondary development of the bottom modeling technology, that is, manual modeling with Fortran language, further improves the accuracy of the regulating valve model and the pipeline model. Through the simulation modeling and experimental analysis of the control valve, the distortion of the operating characteristic curve and the flow characteristic of the regulating valve are obtained, and compared with the theoretical calculation. The feasibility and reliability of GSE simulation software are verified. Through the study and analysis of the flow characteristic distortion of the regulating valve, it is shown that the pressure difference proportion of the regulating valve in the system is small and the distortion is obvious, so in the design of the control valve type selection, The effect of distortion on valve flow characteristics must be considered. Finally, through the simulation test and analysis of different selection design schemes, a reasonable selection design scheme is selected.
【学位授予单位】：中国舰船研究院
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH134

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