板框式压滤机控制系统的PLC设计【毕业作品】

B I YE SHE JI

（20届）

板框式压滤机控制系统的PLC设计

所在学院

专业班级自动化

学生姓名学号

指导教师职称

完成日期年月

I

摘 要

随着全球经济的迅速发展，能源行业、环保行业也在迅猛发展，在食品、煤炭、冶金、医药制造、生物生产、生活工业污水、江河治理、化工等高品位、高纯净的生产中，过滤与分离机械工业越来越受到全球的重视，分离与过滤机械进入了高速发展的轨道，而压滤机作为一种间歇性的过滤分离装置设备，主要进行固液分离操作。同时，压滤机最大的优越性就是正压、高强压脱水，使滤饼水分低、能耗少，金属流失少，滤液更清晰透明。固液分离装置起源甚早，历史悠久，近几十年科技进步快速，固液分离装置更新换代也相当迅速。我国工业制造业也在快速发展，各种先进的压滤机影响了工业的一次次的创新。

本此设计主要介绍了板框式压滤机的结构和工作原理，对PLC 及其S7-200系列PLC 做了简单概述，就采用S7-200系列PLC 控制压滤机的设计方法进行了描述。分析了系统的工作原理，详细的说明了电气控制系统的流程图、PLC 的I/O 地址分配和程序梯形图的绘制。这种控制方法大大提高了系统的自动化程度和设备的生产效率，具有较大的推广价值。

关键词关键词：：压滤机，PLC ，工作原理，控制系统

Abstract

With the rapid development of the global economy, with the energy industry, the environmental protection industry also in rapid development in food, coal, metallurgy, medicine manufacture, biological production, life sewage, industrial management, chemical and other rivers high grade, high pure production, filtering and separating machinery industry has been more and more importance of the global, separation and filtration machinery into a high-speed development of the track, and filter press as a kind of intermittent filtration separation devices, the main solid-liquid separation operation. At the same time, pressure filter is the greatest advantage of the positive pressure, high crush dehydration, make water filter cake low, less energy consumption, metal loss less, filtrate more clear and transparent. Solid-liquid separation device very early origin, has a long history, science and technology progress rapidly in the past few decades, solid-liquid separation equipment renewal is also quite quickly. Our industrial manufacturing industry is rapidly developing, various kinds of advanced filter press affected industrial and innovation. Our industrial manufacturing industry is rapidly developing, various kinds of advanced filter press affected industrial and innovation.

This design mainly introduced the plate and frame type filter press the structure and the working principle of PLC and its series S7-200 PLC made a brief overview, use series S7-200 PLC control pressure filter design method are described. The analysis of system working principle, the details of the electrical control system, PLC flow chart of the I/O address assignment and process ladder chart drawing. This control method has greatly improved the system automation degree and equipment production efficiency, which have great applied value.

KeyWords: Filter press，PLC，Working principle，Control system

II

目录

摘 要...........................................................................................................................I ABSTRACT.................................................................................................................II 目 录.........................................................................................................................III 第一章 引 言. (1)

1.1 设计的目的及意义 (1)

1.2 压滤机的发展历程 (1)

1.3 本设计的主要内容 (5)

第二章 板框式压滤机的结构和工作原理 (6)

2.1 板框式压滤机的结构 (6)

2.2 板框式压滤机的工作原理 (8)

2.3 压滤机的工作过程 (8)

第三章PLC及S7-200系列PLC概述 (10)

3.1 PLC概述 (11)

3.1.1 PLC的产生与发展 (11)

3.1.2 PLC的特点 (12)

3.1.3 PLC的分类及应用 (14)

3.1.4 PLC的工作过程 (15)

3.1.5 PLC的组成 (15)

3.1.6 PLC的编程语言 (15)

3.2 S7-200系列PLC概述 (18)

3.2.1 S7-200系列PLC的型号 (18)

3.2.2 S7-200系列PLC系统构成 (19)

3.2.3 S7-200型PLC的软件特点 (21)

3.2.4 S7-200系列的PLC编程器 (22)

3.2.5 S7-200系列PLC的内部继电器 (22)

第四章板框式压滤机控制系统的PLC设计 (23)

4.1板框式压滤机的PLC控制系统的构成与工作原理 (23)

4.1.1 压滤机电气控制系统的构成 (23)

4.1.2 压滤机的电气系统的工作原理 (23)

4.2 压滤机PLC电气控制系统的工艺流程 (24)

4.3 板框式压滤机的主电路设计 (24)

4.4 板框式压滤机的PLC I/O连线图 (24)

4.5 CPU224及数字量扩展模块EM223外围接线图 (28)

III