燃煤电厂烟气元素汞检测技术的研究进展

Research on detection of elemental mercury in flue gas of coal-fired power plants

燃煤电厂烟气治理引发了社会各界关注,汞由于其剧毒性和生命体易富集性一直以来是烟气检测中最重要的元素之一。EPA、MESA、HEST和OHM等传统取样检测技术采样困难和抗干扰能力弱限制了其应用。近年来,基于光谱法和化学传感器技术建立的在线检测技术发展显著。光谱法精度高,应用广泛,但操作复杂且仪器昂贵。化学传感器检测技术具有高选择性、操作简单和价格低廉等优点受到广泛关注。本文以检测汞为目的,介绍了目前主要的取样检测技术和在线检测技术,并对未来的汞检测技术的发展方向进行了展望。

The treatment of flue gas from coal-fired power plants has attracted the attention of all circles of society.Mercury has always been one of the most important elements in flue gas because of its acute toxicity and the enrichment of living organisms.Traditional sampling detection techniques have been limited by sampling difficulties and weak anti-interference ability,such as EPA,MESA,HEST and OHM.In recent years,the on-line detection techniques based on spectrometry and chemical sensor techniques have been developed significantly.Spectrometry has high precision and wide application,which is complicated and expensive.Because of its high selectivity,simple operation and low price,chemical sensor detection techniques have been widely concerned.This paper has summarized the major sampling techniques and online detection techniques in detection of mercury,and prospects in this field are also presented.