华能伊敏电厂4#送风控制系统组态

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沈阳工程学院自动化学院《计算机控制系统》课程设计设计题目:华能伊敏电厂4#送风控制系统组态系别:自动化系班级:自动化B131学生姓名:黄刚学号:2013334119指导教师:、职称:讲师、副教授课程设计进行地点:F526,图书馆,F615任务下达时间:2015年1月5日起止日期:2015年1月5日起——至2015年1月16日止系部主任2015年1月5日批准2《计算机控制系统》课程设计任务书以下内容根据各专业特点自行确定(如条件、资料、内容、任务、进度安排及要求等):1.设计主要内容及要求;a.熟悉送风控制系统的原理和控制方式,以及控制逻辑。b.掌握常用功能块的用途。会分析出送风控制系统功能块组态图。2.对设计说明书、论文撰写内容、格式、字数的要求;(1).课程设计说明书(论文)是体现和总结课程设计成果的载体,一般不应少于3000字。(2).学生应撰写的内容为:中文摘要和关键词、目录、正文、参考文献等。课程设计说明书(论文)的结构及各部分内容要求可参照《沈阳工程学院毕业设计(论文)撰写规范》执行。应做到文理通顺,内容正确完整,书写工整,装订整齐。(3).说明书(论文)手写或打印均可。手写要用学校统一的课程设计用纸,用黑或蓝黑墨水工整书写;打印时按《沈阳工程学院毕业设计(论文)撰写规范》的要求进行打印。(4).课程设计说明书(论文)装订顺序为:封面、任务书、成绩评审意见表、中文摘要和关键词、目录、正文、参考文献。33.时间进度安排;顺序阶段日期计划完成内容备注1第一周周一查资料2周二熟悉送风控制系统的原理,方式及控制逻辑3周三熟悉送风控制系统的原理,方式及控制逻辑4周四查找功能块5周五设计功能块组态图6第二周周一上机画图,修改7周二上机画图,修改8周三分析组态9周四总结,写报告10周五总结,写报告4、参考资料:(1)热工控制系统教材(2)分散控制系统教材(3)infi90功能码手册(4)华能伊敏电厂4#机组控制系统组态资料4沈阳工程学院自动化学院《计算机控制系统》课程设计成绩评定表系(部):自动化班级:自动化B131学生姓名:黄刚指导教师评审意见评价内容具体要求权重评分加权分调研论证能独立查阅文献,收集资料;能制定课程设计方案和日程安排。0.15432工作能力态度工作态度认真,遵守纪律,出勤情况是否良好,能够独立完成设计工作,0.25432工作量按期圆满完成规定的设计任务,工作量饱满,难度适宜。0.25432说明书的质量说明书立论正确,论述充分,结论严谨合理,文字通顺,技术用语准确,符号统一,编号齐全,图表完备,书写工整规范。0.55432指导教师评审成绩(加权分合计乘以12)分加权分合计指导教师签名:年月日评阅教师评审意见评价内容具体要求权重评分加权分查阅文献查阅文献有一定广泛性;有综合归纳资料的能力0.25432工作量工作量饱满,难度适中。0.55432说明书的质量说明书立论正确,论述充分,结论严谨合理,文字通顺,技术用语准确,符号统一,编号齐全,图表完备,书写工整规范。0.35432评阅教师评审成绩(加权分合计乘以8)分加权分合计评阅教师签名:年月日课程设计总评成绩分华能伊敏电厂4#送风控制系统组态I摘要风量是锅炉运行质量的重要指标之一,风量过高或过低都会影响电厂的安全性、经济性,必须通过自动化手段加以控制。风量控制的任务是:送风量是当机组负荷变化时要保证燃烧过程中有合适的燃料与风量的比例关系,确保燃烧的经济性和稳定性。引风量是保持炉膛压力稳定在给定值,确保燃烧的安全性。风量调节方法采用开大或关小风机动叶或挡板的调节方法。送风控制系统在平衡状态下,协调来的送风指令与修正后的风量信号相等,调节器的偏差为零,输出不变,送风机动叶保持在某一位置,烟气含氧量为最佳值。当增加负荷时,送风指令增加,调节器输入有正偏差,积分作用使送风挡板开大,增加送风量直至与送风指令相等,调节器输出不变。上述过程是比较快的,可以看作是粗调。在送风内回路控制过程结束后,烟气含氧量也开始变化。当烟气含氧量大于最佳值时,说明送风量过大,此时调节器输出增加,即送风修正系数增大,总风量信号增大,使调节器输入偏差为负,去关小送风机挡板开度以减少送风量。同理,当含氧量小于最佳值时,控制系统动作去开大送风机挡板以增加送风量。本文正文共分六部分,第一部分是引言,主要对课题背景、选题意义进行简单介绍。第二部分从本设计系统出发,阐述送风自动控制系统,介绍了关于送风系统的调节、投运及在火电厂中的应用等内容。第三部分为设计思想,主要讨论本系统应采用什么样的控制方案。第五部分为实例分析,对SAMA图的分析,对逻辑图的分析,便于工作人员更好的理解。第五部分为结论,对本文的高度概括。关键字:SAMA图,引风量,挡板调节沈阳工程学院课程设计II目录摘要·································································································I1引言····························································································11.1课题背景············································································11.2选题意义············································································22送风自动控制系统·········································································32.1送风量控制系统···································································32.2风机的喘振·········································································52.3送风自动调节系统分析·························································52.4送风调节系统的自动投运······················································72.5送风控制系统在火电厂中的应用·············································83设计思想······················································································93.1送风控制系统的设计·······························································93.2送风控制··············································································103.2.1控制目的·······································································103.2.2功能说明·······································································103.2.3强制输出·······································································103.2.4强制手动·······································································104控制系统SAMA图及逻辑图分析·······················································114.1SAMA图符号与逻辑图功能码说明·········································114.2图纸分析···········································································124.2.1测量回路·································································124.2.3送风机动叶控制回路··················································124.2.4送风、引风控制系统逻辑图分析···································14结论·······························································································18参考文献·························································································19致谢·······························································································20附录·······························································································21华能伊敏电厂4#送风控制系统组态11引言1.1课题背景火力发电厂在我国电力工业中占有主要地位,是我国重点能源工业之一,大型火力发电机组在国内外发展很快,是我国现以300MW机组为骨干机组,并逐步发展600MW以上机组。目前,国外已建成单机容量1000MW以上的单元机组。单元发电机组是由锅炉、汽轮发电机和辅助设备组成的庞大的设备群。由于其工艺流程复杂,设备众多,管道纵横交错,有上千个参数需要监视,操作或控制,而且电能生产还要求有高度的安全可靠性和经济性,因此,大型机组的自动化水平受到特别的重视。锅炉风量就是其中一项需要监视的重要参数。锅炉风量包括送风量和引风量。本次设计题目是:600MW火力发电单元机组送、引风控制系统。本次设计是以华能发电厂为课题背景,提供的原始资料及依据如下:型式:亚临界一次中间再热自然循环汽包锅炉;型号:HZ-1021/18.2-YMX;最大连续蒸发量:1021t/h;过热蒸汽压力:18.2Mpa;汽轮机型号:N300-16.7/537/537;过热蒸汽温度:537℃;再热蒸汽出口温度:537℃。华能电厂本期改造工程为#4机600MW燃煤凝汽式机组。机组主机设备(锅炉、汽机和发电机)为哈尔滨三大主机厂生产。锅炉为亚临界,自然循环,中间再热汽包炉,制粉系统采用5台正压直吹式中速磨系统,一次风送粉;燃烧为单炉膛四角切圆燃烧,燃烧器布置有五层煤粉,两层油。点火方式采用蒸汽雾化二级点火(点火器点轻柴油,轻柴油点燃煤粉)汽机为单轴,双缸双排汽,中间再热凝汽式。发电机为水氢氢冷却方式。主蒸气和给水系统为单元制热力系统。设有2×50%B-MCR容量的汽动给水泵和1×50%B-MCR容量电动调速给水泵作为启动备用泵,旁路系统设有35%B-MCR容量的高,低压串级旁路。回热抽汽系统由3台高加,1台除氧器,4台低加组成。沈阳工程学院课程设计21.2选题意义锅炉送风量、引风量是影响锅炉生产过程经济性和安全性的重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