基于PLC的油田污水处理系统的设计与研究

发布时间：2018-06-04 03:44

本文选题：油田污水处理 + 自动控制　；参考：《东北石油大学》2016年硕士论文

【摘要】：目前大庆油田污水处理自动控制系统核心部件种类多,应用数量繁杂,运行程序由于开发者的开发习惯导致编制不规范,给后期的维护带来了极大的麻烦。为此,本文通过对油田污水处理工艺的研究,结合PLC控制器,采用规范的运行程序及标准的软件编制体系,开发了一套高效的含油污水自动控制系统。本文通过对油田污水站现场情况的调研,分析了油田污水站的处理工艺及监控点配置情况,针对污水处理过程中存在的问题,确定了系统的总体设计方案。根据污水站的实际工作情况对过滤罐的反冲洗参数进行优化研究,结合PID控制和模糊控制的优点,提出采用模糊PID算法实现对反冲洗强度的精确控制,在大偏差范围内利用模糊推理的方法调整系统控制量,在小偏差范围内转化为PID控制,并以给定的偏差范围自动完成二者转换。通过现场测试证明,采用模糊PID控制能够提高系统的稳定性,减少滤料被冲走的几率,滤罐反冲洗后,处理水的效果符合检测标准。由于PLC控制器具有技术成熟、通用性好、可靠性高、扩展方便等一系列优点,本文设计的控制系统以西门子公司的S7-300做为核心控制器,建立PLC控制平台,完成污水处理过程中对液位、压力、流量等控制功能的程序设计。然后在KINGVIEW 6.53的开发平台上进行组态软件设计,使该系统在完成相应控制功能的基础上,通过通讯软件的配置,实现控制系统模型通讯开放,进一步与油田物联网连接,达到集中管理和实时监控的目的。通过分析污水处理自动控制系统的性能及现场应用情况,总结了该控制系统的完整性、高效性及可靠性,获得了较高的经济效益,具有广泛的推广应用前景。
[Abstract]:At present, there are many kinds of core components in the automatic control system for wastewater treatment in Daqing Oilfield, and the number of applications is complicated. Because of the development habits of the developers, the operating procedures are not standardized, which brings great trouble to the maintenance in the later period. Therefore, through the research of oilfield sewage treatment process, combining with PLC controller, adopting the standard operation program and standard software programming system, a set of high efficient automatic control system of oily sewage is developed in this paper. Based on the investigation and investigation of the field situation of the oilfield sewage station, this paper analyzes the treatment process of the oilfield sewage station and the configuration of the monitoring point. In view of the problems existing in the process of sewage treatment, the overall design scheme of the system is determined. According to the actual working conditions of the sewage station, the optimization of the backwash parameters of the filter tank is studied. Combined with the advantages of PID control and fuzzy control, a fuzzy PID algorithm is proposed to realize the accurate control of the backwash intensity. The fuzzy reasoning method is used to adjust the control quantity of the system in the large deviation range, and the control is transformed into PID control in the small deviation range, and the conversion between the two is completed automatically with the given deviation range. It is proved by field test that fuzzy PID control can improve the stability of the system and reduce the probability of the filter material being washed away. Because the PLC controller has a series of advantages such as mature technology, good generality, high reliability, easy expansion and so on, the control system designed in this paper takes Siemens S7-300 as the core controller, and establishes the PLC control platform. Complete the process of sewage treatment level, pressure, flow and other control functions of the program design. Then the configuration software is designed on the development platform of KINGVIEW 6.53. On the basis of the corresponding control function, the model communication of the control system is open and connected with the oil field Internet of things through the configuration of the communication software. Achieve the goal of centralized management and real-time monitoring. By analyzing the performance and field application of the automatic control system for sewage treatment, the integrity, high efficiency and reliability of the control system are summarized.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X741

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