优化串级控制系统在水钢2＃焦炉的研究与应用-控制理论与控制工程专业论文.docx

武汉科技大学硕士学位论文第1页摘要焦炉是冶金行业中最复杂的炉窑，它的加热燃烧过程是单个燃烧室间歇、全炉连续、 受多种因素干扰的热工过程，是典型的大时滞、大惯性、时变快的复杂系统。如何优化焦 炉加热过程控制，降低炼焦能耗，确保焦炭均匀稳定成熟，同时延长焦炉使用寿命等，仍 然是炼焦界最大难题之一。在以降低成本，加快生产自动化控制过程，提高企业核心竞争力的总体思路下，针对 水钢焦化厂的人工超作模式，本系统将优化串级控制技术具体应用到实际生产中，以实现 对焦化生产的重要参数监控和有效控制，最终实现焦化厂的全自动控制，为企业提供可靠科学的决策依据。 课题主要内容包括： 1．本项目的来源和目标。2系统的总体结构—介绍了焦炉燃烧过程生产工艺以及控制要求和控制方案的实施。3．系统的配置和S7．300软件的编制。4．系统上位机监控画面的设计。5．结论和展望。本系统采用西门子S7．300型PLC为现场控制器，工控组态软件WINCC作为上位机 的监控平台，实现了焦炉火道温度的良好控制，运行结果表明，焦炉优化串级控制系统 (OCC系统，Optimizing Cascaded Contr01)在实际的应用中整体控制效果良好，有效的降低 了炉温波动，保证了加热煤气的充分合理燃烧，同时大大减轻了工人的劳动强度，实现了 焦炉燃烧过程温度的优化控制。关键词：串级控制；前馈；反馈；模糊控制第1I页武汉科技大学硕士学位论文AbstractThe coke oven is the most complicated stove kiln in mc泣allurgry．The heating course of the coke oven is intermittence of single combustion chamber but all combustion chamber are successive．111e progress of calefaction is interfered with different kinds of factors．ne coke OVen is a typical great intefia,nonlinear and quick—vary complicated system．So there are graveness problems in coking plant industry all OVer the world．how to optimize the control of heating course，reduce the engrgy consumption of coking,guarantee the coke is even and steady and ripe，lengthen service life of coke oven,etc，remains one of the great difficult problems ofcoking industry．Under the overall mentality ofreducing the cost，speeding up he Production autonlalion control advancement,enhancing the core competitive power， in view ofmanual control pattern of coking plant，this paper elaborates that computercontr01 technology applied in the actual production realizes the surveillance of important influencing factors and the control of accuracyand more efficiency in coking production．Eventually,it realizes automatic control in cokingproduction and provides more effective、accurate、safer control model for the coking plant．Italso provides the enterprise wiⅡl reliable and Scientific policy-making basis．T11is topic mainly includes：1．the SOUrce and targets of this project．2．System’S overall structure-introduci