毕业设计（论文）-基于PLC的锅炉出水温度控制系统的研究与设计.doc

毕业设计
锅炉出水温度控制系统的研究与设计
总计毕业设计(论文) 61页
表格 2表
插图 16幅
摘要
随着我国经济的发展,资源和环境矛盾同趋尖锐,使我国的现代化建设面临严峻挑战。作为温度控制系统重要能源转换设备的锅炉能耗巨大,占我国原煤产量的三分之一左右。然而,我不高、安全性低,工作效率和环境污染普遍低于国家标准,因此实现锅炉的计算机自动控制具有重要的意义。
随着科学技术的不断发展人们开始利用各种先进的仪器和技术组成计算机控制系统来代替人工复杂的控制操作,直接数字控制DDC系统(Direct Control),便是其中之一。直接数字控制DDC系统,它是工业生产计算机控制系统中用的最广泛的一种系统应用形式,在这类系统中的计算机,除了经过输入通道对多个工业过程参数进行巡回检测采集外,它还代替了模拟调节系统中的模拟调节气,按预定的调节规则进行调解运算,然后将运算结果通过过程输出通道输出并作用于执行机构,以实现多回路调节的目的。
本设计设计了基于PLC的锅炉温度控制系统,该系统包括下位机控制和上位机控制两部分。文中给出了通过时间和室外温度相结合的控制策略对系统温度进行调节控制。
关键字:锅炉;计算机控制; PLC
Abstract
With China’s economic development,resources and the environment has e increasingly acute contradictions,so that the modernization of our country is facing a formidable an important energy source conversion equipment,heating system of the industrial boiler consumes about one-third of China’s ,the majority of China’s current operating boiler system’s security and efficiency is generally lower than the national it's great significance to achieve automatic control for boiler puter.
Along with science technical develop continuously people start making use of every kind of advanced instrument constituting the calculator control system with the technique to the control operation that replace the plicacy, direct arithmetic figure control DDC system( Direct Control), just one of them Direct arithmetic figure control DDC system, it is an industry to produce convenient and the most extensive a kind of system in system of control of calculator application form, in addition to through importation passage to several industries process parameter proceeding cruising to return to examination to collect, it returned to replace the emulation regulates the emulation in the system regulates the spirit, at the set regulate rule proceed the intermediation carries to calculate, then will carry to calculate result pass process output passage bine function in carry out anization, to realize many the purpose tha