锅炉汽包水位控制系统设计.doc

目录前言................................................................11锅炉工艺过程简介..................................................41.1锅炉的作用和组成................................................42汽包锅炉工艺......................................................72.1汽包锅炉简介....................................................72.2汽包水位控制系统................................................72.3汽包水位的动、静态特性..........................................82.3.1汽包水位在给水流量作用下的动态特性...........................82.3.2汽包水位在蒸汽流量扰动下的动态特性...........................92.3.3燃料量扰动下汽包水位的动态特性..............................102.3.4水位对象静态特性分析........................................103单冲量水位控制系统、双冲量控制系统、三冲量系统.................123.1单冲量水位控制方案............................................123.2双冲量控制方案................................................133.3三冲量控制方案................................................153.4几种控制方案的比较............................................174控制规律的选择..................................................184.1实际应用中常用控制器的选择....................................184.1.1比例控制器..................................................184.1.2比例积分控制器..............................................184.1.3比例积分微分控制器..........................................194.2控制器的正反作用..............................................195三冲量控制系统的工程整定........................................225.1锅炉汽包水位控制最优方案确定..................................226仪表选型.........................................................256.1调节器的选型..................................................256.2电动执行机构的选型............................................276.3变送器的选型..................................................296.4显示仪表选型..................................................316.5加法器选型....................................................326.6仪表盘面端子接线图............................................32总结..............................................................34致谢..............................................................35参考文献..........................................................36