摘要
聚酯生产装置共有5台58 600MJ的燃煤锅炉,为了使锅炉烟气中的NOx达标排放,在烟气排放前增加了脱硝装置,脱硝工艺采用选择性非催化还原法,以S7-300 PLC作为其控制核心,采用WinCC设计操作站的监控和数据采集系统,重点给出了模拟量的输入与转换、PID控制回路和氨水流量累积过程的组态和程序代码。
The polyester plant has five coal-fired boilers( 58600MJ). In order to cut down NOxin the exhaust fumes up to the standard,installing a denitration device before the fuel gas emission was proposed and the selective non-catalytic reduction( SNCR) method was applied to the denitration process,in which,S7-300 PLC answers for the control and taking WinCC as SCADA software. The attentions were directed at the analog input and conversion,configuration and program code of PID control loop and the ammonia flow accumulation process.
出处
《化工自动化及仪表》
CAS
2014年第7期823-828,共6页
Control and Instruments in Chemical Industry
