燃煤电厂超低排放背景下颗粒物在线测量方法研究

Research on on-line monitoring technology for particulate matters based on ultra-low emission requirements in coal-fired power plants

燃煤电厂进行机组超低排放改造后,机组颗粒物排放量大幅度降低。针对现有颗粒物测试方法测量原理及在超低排放背景下应用的局限,提出一种新的集采样与测量于一身的测量方法。该方法通过鼓泡方式将颗粒分成2部分,通过激光散射法进行测量,通过参比实验验证方法的可行性,参比误差随着待测颗粒物浓度增加而趋于稳定。该方法为准确测量超低排放条件下颗粒物浓度、制定燃煤电厂低浓度排放颗粒物测试标准提供依据。

The content of particulate matters discharged from the power generator units has declined greatly since the units in a coal-fired power plant is renovated to meet requirements of ultra-low emission.In view of the detection principle of the existing measurement methods for particulate matter and their application limitations to meet the requirement of ultra-low emission,a new method integrating sampling and detection is proposed.This method divides particles into two parts through bubbling.These two parts are respectively measured by laser scattering method.The feasibility of the method is verified by reference experiments.The reference error tends to be stable as the concentration of the particles increases.This method provides a basis for accurately measuring the concentration of particulate matters under ultra-low emission requirements and formulating test standards for low-concentration emission particulate matter in coal-fired power plants.