神华胜利发电厂磨煤机选型及其控制系统研究

发布时间：2019-03-14 16:29

【摘要】：我国是煤炭大国,随着自动化技术和电力技术的发展,资源的高效利用和设备选型成为发电厂科研工作者需要攻克的重要课题。磨煤机又是制粉系统中的最核心辅机,而各种磨煤机的结构、出力、煤种适应性等均不同,故对其选型进行研究是十分必要的。因此本文以神华胜利发电厂磨煤机选型及其控制系统研究对象,通过理论方法和仿真实验得出温度改进和出力改进的方法。为了解决磨煤机选型和验证所选系统的稳定性问题、本文通过对比HP和MPS类型磨煤机工作原理、规格参数、运动特性、性能参数计算和结构特性,并结合对出口、入口的温度和煤量仿真验证最安全和最稳定的磨煤机,并给出了提升性能的建议和方法。通过对煤和煤粉系统特性的分析确定了磨煤机的选型及其外部设备的选择。使用数据资源对比法解决了针对当地煤种的高效利用问题。本文确定了制粉系统和磨煤机的选择之后,从理论上提出了一套基于PLC的系统控制方案,确定了MPS-HP-II型磨煤机控制系统的PLC硬件和软件系统设计,在此基础上对基于工程参数整定的磨煤机PID控制参数整定进行了讨论,达到良好的控制效果。
[Abstract]:China is a big coal country. With the development of automation technology and electric power technology, the efficient utilization of resources and equipment selection have become an important issue for scientific researchers in power plants. The coal mill is also the core auxiliary in the pulverizing system, and the structure, output and adaptability of various coal mills are different, so it is very necessary to study the selection of the coal pulverizer. In this paper, the selection of coal mill and its control system of Shenhua Shengli Power Plant are studied, and the methods of temperature improvement and output improvement are obtained by theoretical method and simulation experiment. In order to solve the problem of selecting type of coal mill and verifying the stability of the selected system, this paper compares the working principle, specification parameter, motion characteristic, performance parameter calculation and structure characteristic of HP and MPS type coal mill, and combines with the outlet. The inlet temperature and coal quantity are simulated to verify the safest and most stable coal mill, and the suggestions and methods to improve the performance are given. By analyzing the characteristics of coal and pulverized coal system, the type selection of coal mill and the selection of external equipment are determined. The method of data resource comparison is used to solve the problem of efficient utilization of local coal species. After the selection of pulverizing system and coal mill is determined in this paper, a set of system control scheme based on PLC is put forward theoretically, and the design of PLC hardware and software system of MPS-HP- type II coal mill control system is determined. On the basis of this, the PID control parameter setting of coal mill based on engineering parameter setting is discussed, and good control effect is achieved.
【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】：2017
【分类号】：TP273;TM621

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