基于PLC的自来水厂净水处理控制系统设计
摘要：水资源是人们生活中的一项重要资源，随着社会经济的迅速发展和生活水平的提高，人们更加注重身体的健康，对水的质量也变高了。因此，拥有一套简单又效率的水净化处理系统就显得非常重要。本课题是通过对国内和国外已经建设的自来水厂的了解，国内的自来水厂净水处理技术比较落后，而国外的净水处理技术越来越自动化。根据我国的落后水净化处理设备，本文设计是由三菱PLC作为控制器，实现自动化的水净化处理系统，本系统的每个环节都是由三菱PLC进行监控。该系统不仅统降低消耗，提高了生产效率，可以准确的投放药量，大大提高了水的质量和节约了人力成本。对于我国水厂供水工艺的发展起到推动的作用，缩短与先进技术水平的距离。通过实际的生产的状况，本系统经济实用、简单方便。
关键词：中小型PLC；自动控制系统；上位机监控系统；自来水净化
Design of water purification process control system based on PLC
Abstract:Water resource is an important resource in people's life. With the rapid development of social economy and the improvement of living standard, people pay more attention to the health of the body, and the quality of the water becomes higher. Therefore, it is very important to have a simple and efficient water purification treatment system. This topic is through the domestic and foreign water plant has been built to understand, the domestic water plant water treatment technology is relatively backward, and foreign water purification treatment technology is more and more automated. According to the water purification equipment backward in our country, this paper was designed by MITSUBISHI PLC as the controller, automatic water purification system, each part of the system is monitored by MITSUBISHI PLC. This system not only reduce the consumption, improve production efficiency, can accurate delivery charge, greatly improving the water quality and save manpower cost. To promote the role for the development of China's water supply process, shorten the distance with advanced technical level. Through the actual production situation, this system is economical and practical, simple and convenient.
Keywords: small and medium PLC; automatic control system; upper computer monitoring system;water purification
目录
第一章 引言.............................................................1
1.1 课题来源及背景......................................................1
1.2 本课题的现状和作用..................................................1
1.3 本课题的主要研究内容的总体介绍......................................1
第二章 系统各控制环节的具体操作.........................................3
2.1 取水泵的选择和控制..................................................3
2.2 絮凝剂的投放控制....................................................3
2.2.1 药箱加药的手动控制............................................3
2.2.2 药箱加药的自动控制............................................3
2.3 沉淀过滤淤泥的清理控制..............................................4
2.3.1 反应沉淀后的淤泥处理方法......................................4
2.3.2 过滤后的杂质处理方法..........................................4
2.4 活性炭的投放控制....................................................4
2.4.1 技术原理......................................................4
2.4.2 工艺流程......................................................5
2.5 加氯消毒控制........................................................6
2.5.1 系统结构......................................................6
2.5.2 控制特点......................................................6
第三章 系统硬件设计.....................................................8
3.1 系统所需仪器设备....................................................8
3.2 电气控制系统........................................................8
3.3 净水处理系统的工作原理..............................................8
3.3.1 控制系统总体框图...............................................8
3.3.2 工作过程.......................................................9
3.3.3 净水处理系统主电路设计........................................10
3.4 PLC选型............................................................11
3.5 PLC的I/O分配......................................................11
3.5.1 输入点的分配.................................................11
3.5.2 输出点的分配.................................................12
第四章 系统软件设计....................................................14
4.1 总体流程设计.......................................................14
4.2 手动模式...........................................................14
4.3 自动模式...........................................................15
4.4 PID控制............................................................20
第五章 系统调试和运行结果..............................................23
5.1 硬件系统的调试.....................................................23
5.2 软件系统的调试.....................................................23
5.3 运行结果...........................................................28第六章 总结............................................................30
6.1 本系统设计的总结...................................................30 参考文献...............................................................31
附录：
附录一.................................................................32
附录二.................................................................39
附录三.................................................................40
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