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1、毕业设计说明书（论文）中文摘要随着我国工业的快速发展，SO2 污染已成为目前亟待解决的环境问题，各工业现场纷纷采用各种脱硫工艺来实现对 SO2 排放的控制。为了更好地对烟气进行脱硫，本文在分析石灰石/石膏法烟气脱硫工艺的基础上，基于 SIEMENS PLC 与HMI 提出了烟气脱硫监控系统设计方案。系统由石灰石浆液制备系统、烟气系统、吸收系统和石膏脱水系统四部分组成，通过 SIEMENS PLC 内置的 PID 控制算法，实现了吸收系统浆液 pH 值、浓度控制，制浆系统液位、浓度控制，烟气系统增压风机导通角控制以及石膏脱
2、水系统转速控制，最终实现对烟气脱硫系统的整体控制，达到控制 SO2 排放的目的。调试结果表明，系统运行可靠，实现了烟气脱硫控制系统的控制，达到了预期的效果。关键词烟气脱硫监控系统，PLC，HMI，PIDTitle毕业设计说明书（论文）外文摘要Design of Monitoring System for FGD Process------PLC SubsystemAbstractWith the rapid development of China's industry,SO2 pollution has became
3、 the currentenvironmental problem to be solved,each industrial field have adopted variousdesulfurization process to achieve the emission control of SO2.To desulfurizating fluegas more better,based on the analysis of the limestone / gypsum flue gas desulfurization
4、process and the SIEMENS PLC with HMI tools,this paper proposes a subject of FGDcontrol system,which consists of four parts:slurry preparation system,flue gassystems,absorption systems and gypsum dewatering system.Through the built-in PIDcontrol algorithm of SIEME
5、NS PLC,this program realizes the control of pH value andconcentration of the absorption system,the slurry level and concentration of pulpingsystem,the conduction angle of boosters of flue gas system,the speed of gypsumdewatering system,and ultimately realize the
6、overall control of the FGD system,achievethe purpose of limiting the SO2 emission.The debugging results show that this systemwas in reliable motion and realized the control of FGD,the expected result wasachieved.KeywordsFGD,PLC,HMI,PID目录第 Ⅰ 页共 Ⅰ 页1 绪论..........
7、.................................................................................................................................11.1 烟气脱硫背景........................................................................................................................11.
8、2 国内外烟气脱硫技术现状...................................................................................................11.3 烟气脱硫的意义...................................
