基于滤膜称重法的在线式烟尘浓度监测系统设计

摘要

鉴于诸多现有大气烟尘监测方法无法实现在线连续监测,监测流程繁琐,监测效率低等缺点,根据我国基于称重法的烟尘固体颗粒物监测的相关标准,设计了一种基于滤膜称重法的在线式烟尘浓度监测系统.该系统使用PLC和WINCC上位机对系统各部分进行实时控制,实现滤膜自动加载要求,对监测数据进行实时分析处理.使用该系统对太原二电厂现场烟尘浓度进行实时监测,监测结果表明,该系统实现了滤膜自动加载以及在线式连续监测和无人值守,对各种需要实时烟尘监测的场所极具实用意义.%The available smoke concentration monitoring methods can′t realize the on-line continuous monitoring,and has the defects of tedious monitoring process and low monitoring efficiency. On the basis of the national standards related to smoke solid particle monitoring based on weighing method,an on-line smoke concentration monitoring system based on filter membrane weighing method is put forward. The PLC and WINCC upper computer are used in the system to control each component of the system in real time,implement the automatic loading of filter membrane,and analyze and process the monitoring data in real time. This system was used to monitor the site smoke concentration of Taiyuan Second Thermal Power Plant in real time. The monitoring results show that the system can realize the automatic loading of filter membrane,on-line continuous monitoring and unattended running,and has extremely practical significance for various sites needing real-time smoke monitoring.