选煤厂煤泥压滤自动控制系统

发布时间：2018-03-04 16:04

本文选题：压滤机　切入点：PLC　出处：《中国矿业大学》2015年硕士论文　论文类型：学位论文

【摘要】：选煤厂煤泥压滤系统是将煤矿洗选煤工艺中衍生出的煤泥料浆进行过滤压榨,生产出可利用的煤泥资源和可循环的洗选煤水资源的工艺设备组。煤泥压滤系统可靠持续运行是实现煤矿高效生产、资源高效利用的重要保障。煤炭资源的匮乏以及环境的保护亟需对洗选煤产生的煤泥料浆进行压榨,实现煤泥的有效利用和过滤水的循环使用。本文针对目前诸多煤泥压滤系统控制方式复杂、设备不稳定、自动化程度不够完善等问题,在变频控制和智能控制理念上,完成了对压滤自动控制系统的改进和设计。本系统设计针对铁法能源晓南矿选煤厂KM350/2000型快开式隔膜压滤机的控制,将PLC控制技术、变频技术和模糊PID控制策略以及电气控制技术融合到系统中,实现对压滤系统的全功能智能化控制。1、对自动控制系统构架进行了设计;完成了压滤自动控制系统中PLC硬件系统的设计与选型、变频器和传感设备选择等;完成了设备电气控制部分的设计、变频控制的设计;系统以西门子S7-300系列PLC为控制核心,通过PROFIBUS-DP通信技术、以太网通讯技术构建了控制系统的网络通讯。2、采用PID控制策略和变频技术,实现了对入料环节的恒压控制,保障了入料质量和入料管路的安全可靠;采用模糊PID控制技术通过变频调速调节压榨压力的恒定,保障压榨环节设备的安全可靠以及一定的压榨效果;依据压滤环节压榨滤液排量的情况,实现系统闭环控制,实现高效、高质量压榨的目的。3、基于硬件基础,依据控制策略,利用STEP7 Basic V5.5编程软件完成了对PLC系统的硬件组态和参数设置以及程序块功能的实现;采用MCGS组态软件设计了上位机监控界面,监测并控制设备的运行,提供给工人一个可视化的操作平台。本研究对压滤自动控制系统进行了改进设计,对提高压滤系统的工作效率,提升产品质量,节约制造成本,环境保护,有一定的意义和应用价值。
[Abstract]:Coal slime filtration system in coal preparation plant is to filter and press slime slurry derived from coal washing process in coal mine. The process equipment set for producing available slime resources and recyclable water resources for coal washing. The reliable and continuous operation of the slime pressure filtration system is to realize the efficient production of coal mines. The shortage of coal resources and the protection of environment need to press the slurry produced by coal washing. In order to realize the effective utilization of coal slime and recycle of filtered water, this paper aims at the problems of complex control mode, unstable equipment, imperfect automation and so on, in frequency conversion control and intelligent control. The improvement and design of the automatic pressure filter control system have been completed. This system is designed for the control of KM350/2000 type fast open diaphragm filter machine in Xiaonan Coal preparation Plant of Tiefa Coal Mine, and the PLC control technology is used. The frequency conversion technology, fuzzy PID control strategy and electric control technology are integrated into the system to realize the full function intelligent control of the pressure filter system. The automatic control system framework is designed. The design and selection of PLC hardware system in the automatic pressure filter control system, the selection of frequency converter and sensor equipment, the design of the electrical control part of the equipment and the design of frequency conversion control are completed. The control core of the system is Siemens S7-300 series PLC. Through PROFIBUS-DP communication technology and Ethernet communication technology, the network communication of the control system is constructed. By using PID control strategy and frequency conversion technology, the constant pressure control of the feed link is realized, and the quality of the feed and the safety and reliability of the feed pipeline are guaranteed. The fuzzy PID control technology is used to adjust the constant pressure of press by frequency conversion speed regulation, to ensure the safety and reliability of the press link equipment and certain press effect, and to realize the closed loop control of the system according to the discharge of the press filtrate in the filtration link. The purpose of high efficiency and high quality press is realized. Based on hardware and control strategy, the hardware configuration and parameter setting of PLC system and the function of program block are realized by using STEP7 Basic V5.5 programming software. MCGS configuration software is used to design the upper computer monitor interface, monitor and control the operation of the equipment, and provide a visual operating platform for the workers. In this study, the pressure filter automatic control system has been improved and designed. It has certain significance and application value for improving the working efficiency of the pressure filtration system, improving the product quality, saving the manufacturing cost and protecting the environment.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD94;TP273

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