化学水处理监控系统开发及应用研究

发布时间：2018-03-24 22:25

  本文选题：火电厂　切入点：化学水　出处：《华北电力大学(北京)》2016年硕士论文

【摘要】：在火力发电机组的正常运行中,锅炉起着很重要的作用,为防止自然水中的杂质与离子引起锅炉管壁的积盐、腐蚀、结垢等,配置了化学车间对化学水进行净化处理,同时随着现在机组参数和容量的剧增,火电厂化学水处理设备发生了较大的变化,对化学水处理控制提出了更高的要求,因此良好的监控系统既可以保证锅炉补给水处理设备的正常运行,同时还能保证补给水的质量,在火力发电机组的安全运行中进行实时性的监控,避免出现不必要的经济损失。化学水处理是火电厂正常运行开展的核心基础,为了更好的提高火电厂日常安全运作,除盐进水、超滤运行、反渗透出水、阴阳床及混床的进出水等每一步过程都需要化学水处理监控系统的监管和控制,本文以河北大唐国际丰润热电有限责任公司一期工程两台国产300MW亚临界参数燃煤供热机组为例,主要将PLC控制系统应用到火电厂锅炉化学水处理系统中,该系统的设置结合了触摸屏技术,对管网压力有了更好的保护,延长了阀门的使用寿命,提高了火电厂化学水处理控制系统的优化水平,对整个火电厂安全稳定的运行也有着重大的意义。具体内容如下：首先,提出本文选题的背景和意义,通过目前我国火电厂化学水处理监控系统研究的现状分析,指出化学水处理监控系统目前的发展现状和趋势,分析出本文应用PLC监控系统的可行性。其次,提出化学水处理监控系统设计方案,这是本文研究的重点,包括PLC系统软件、硬件平台设计,PLC控制能够进行自动监控化学水的处理,从而促进化学水处理监控系统的设计与实现。然后,设计了化学水流量自动调节系统,通过先进的触摸屏设计,使控制系统更加便捷操作,在实际运行中,化学水流量自动调节系统不仅提高了设备的安全可靠运行还节约了厂用电提高了电厂运行的经济性。最后,对火电厂PLC监控系统在化学水处理系统中的应用做出总结,分析出本文研究的化学水处理PLC监控系统在实际火电厂中的应用展望,对日后化学水处理PLC监控系统的完善研究打下基础。
[Abstract]:The boiler plays an important role in the normal operation of the thermal power generating set. In order to prevent the impurities and ions in the natural water from causing salt accumulation, corrosion and scaling of the boiler tube wall, a chemical workshop is configured to purify and treat the chemical water. At the same time, with the rapid increase of unit parameters and capacity, the chemical water treatment equipment of thermal power plant has undergone great changes, which puts forward higher requirements for chemical water treatment control. Therefore, a good monitoring system can not only guarantee the normal operation of boiler recharge water treatment equipment, but also guarantee the quality of recharge water. To avoid unnecessary economic losses, chemical water treatment is the core foundation for the normal operation of thermal power plants. In order to better improve the daily safe operation of thermal power plants, desalination influent, ultrafiltration operation and reverse osmosis effluent, The supervision and control of chemical water treatment monitoring system are needed in every step of the process of yin-yang bed and mixed bed. This paper takes two domestic 300MW subcritical parameter coal-fired heating units in the first phase project of Hebei Datang International Fengrun Thermal Power Co., Ltd as an example. The PLC control system is mainly applied to the chemical water treatment system of boiler in thermal power plant. The installation of the system combines the touch screen technology, which has better protection to the pipe network pressure and prolongs the service life of the valve. The optimization level of chemical water treatment control system in thermal power plant is improved, which is of great significance to the safe and stable operation of the whole thermal power plant. The specific contents are as follows: firstly, the background and significance of this paper are put forward. Based on the analysis of the current situation of chemical water treatment monitoring system in thermal power plants in China, this paper points out the current development and trend of chemical water treatment monitoring system, and analyzes the feasibility of applying PLC monitoring system in this paper. The design scheme of chemical water treatment monitoring system is put forward, which is the focus of this paper, including the design of PLC system software and hardware platform, which can automatically monitor the treatment of chemical water. So as to promote the design and realization of chemical water treatment monitoring system. Then, the automatic regulation system of chemical water flow is designed. Through the advanced touch screen design, the control system can be operated more conveniently and in actual operation. The automatic regulation system of chemical water flow not only improves the safe and reliable operation of the equipment, but also saves the power consumption and improves the economy of the power plant. Finally, the application of the PLC monitoring system in the chemical water treatment system of the thermal power plant is summarized. The application prospect of chemical water treatment PLC monitoring system studied in this paper in actual thermal power plant is analyzed, which will lay a foundation for the improvement of chemical water treatment PLC monitoring system in the future.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM621.8;TP277

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