火力发电厂锅炉烟气脱硝氨逃逸在线检测术研究与应用

Research and Application of Online Detection Technology for the Escape of the Denitrification

NOx是大气环境的主要污染物之一,主要来源为火力发电机组。依靠低氮燃烧技术,远达不到排放要求。选择性催化还原法(SCR)和选择性非催化还原法(SNCR)是目前使用最为广泛的两种深度处理技术。氨的加入量及其在反应区的空间分布是降低NOx排放的主要因素。目前,国内外在线氨逃逸检测技术多采用激光法,由于现场环境影响,其微量氨测量结果的准确度受到质疑。因此,进行脱硝氨逃逸在线检测技术研究与应用,具有积极的现实意义。

NOx is one of the main pollutions in the atmospheric environment, mainly due to thermal power generating units. Rely on low nitrogen combustion technology, far less than the emission requirements. Selective catalytic reduction (SCR) and selective non catalytic reduction (SNCR) are the most widely used two kinds of deep processing techniques. The addition of ammonia and its spatial distribution in the reaction zone are the main factors to reduce the NOx emissions. At present, in the domestic and foreign online ammonia escape monitoring technology, the use of laser method, due to the environmental impact, the accuracy of the measurement results of the micro ammonia is questioned. Therefore, the study and application of the on-line detection technology for the removal of the nitrate and ammonia escape has positive practical significance.