燃煤电厂脱硫供浆控制系统研究  

Design and Test of Desulfurization Control Unit of Slurry for Coal-Fired Power Plant:An Experimental Study

作　　者：贺心燕[1] 李国庆 He Xinyan;Li Guoqing(College of Coal Engineering ,Shanxi Datong University,Datong 037003,China;Guodian Datong Power Generation Co. ,Ltd,Datong 037043,China)

机构地区：[1]山西大同大学煤炭工程学院,大同037003 [2]国电电力大同发电有限责任公司,大同037043

出　　处：《真空科学与技术学报》2019年第8期732-735,共4页Chinese Journal of Vacuum Science and Technology

基　　金：大同市科技发展计划项目(2018017)

摘　　要：为了稳定降低SO2的排放浓度来满足超低排放要求,设计了一套新的脱硫供浆系统控制方案。首先DCS依据理论公式和CEMS实时数据计算实时理论供浆量,采用串级PID调节供浆流量和出口SO2浓度。其次,增加超前预控系数对PID调节量进行增减干预。再次,以机组负荷和入口SO2浓度两个重要指标作为前馈信号,实时调整供浆流量。该厂实际运行结果表明:脱硫系统长期稳定运行,运行人员劳动强度降低,满足了节能减排要求,保障了企业经济效益。可得结论:此控制方案更好地满足了超低排放的要求,也非常适用于燃用高硫煤的脱硫系统。A novel desulfurization control unit of coal slurry was developed for power plant to meet the environmental requirements on SO2 emission.First,the control scheme was designed,based on the calculation in theory of distributed control system(DSC) and on data acquired in algorithm of continuous emission monitoring system(CEMD),and the cascade PID controllers regulated the flow-rate of slurry and SO2 emission;second,the pre-control coefficient was increased to intervene PID regulation;and finally,the unit-load and SO2 concentration served as the feed forward control signals to precisely adjust the coal-slurry flow-rate in real time.The newly-developed desulfurization control unit,installed in the coal-fired plant,has been continuously working pretty well since July,2018.The results show that the novel control unit does an excellent job.We suggest that the new desulfurization control scheme be of some technological interest in burning of high sulfur coal.

关 键 词：超低排放 脱硫供浆 SO2浓度 PID 控制方案 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]