Yang Liu, Zhang Bin, Wang Kang-Hui, Ma Ding-Ren, Sheng Zhong-Yi
School of Environment Science, Nanjing Normal University, Nanjing 210023, China.
Suzhou Industrial Technology Research Institute of Zhejiang University, Suzhou 215163, China.
Huan Jing Ke Xue. 2019 Jan 8;40(1):121-125. doi: 10.13227/j.hjkx.201805260.
Monitoring of condensable particulate matter (CPM) emitted from stationary pollution sources has often been neglected. To reduce the emission of CPM, it is necessary to study its transformation rules in flue-gas cleaning devices. The results show that the wet flue gas desulfurization (WFGD) and wet electrostatic precipitator (WESP) have a good synergistic effect on the removal of CPM. The concentration of CPM in flue gas is higher than that of filterable particulate matter, but the concentration of total particulate matter (sum of the condensable particulate matter and filterable particulate matter) reaches ultra-low emission requirements. The organic mass concentration of CPM in the WFGD inlet and outlet is larger than that of inorganic components, which is equalized during the treatment of WESP. Based on measurements of the components and concentrations of water-soluble ions in the inorganic part of the CPM, PM can be joined during the CPM trapping process and an acid mist is generated during the condensable particulate matter formation. The acid mist is strengthened through the treatment of WFGD and WESP. The experiment results also show that SO is the main component of water-soluble ions in the inorganic part of CPM.
固定污染源排放的可凝结颗粒物（CPM）监测常常被忽视。为减少CPM排放，有必要研究其在烟气净化装置中的转化规律。结果表明，湿式烟气脱硫（WFGD）和湿式静电除尘器（WESP）在去除CPM方面具有良好的协同效应。烟气中CPM的浓度高于可过滤颗粒物，但总颗粒物（可凝结颗粒物与可过滤颗粒物之和）浓度达到超低排放要求。WFGD进出口CPM的有机质量浓度大于无机成分，在WESP处理过程中二者趋于平衡。基于对CPM无机部分水溶性离子成分和浓度的测量，在CPM捕集过程中PM可能会加入，并且在可凝结颗粒物形成过程中会产生酸雾。通过WFGD和WESP处理，酸雾得到强化。实验结果还表明，SO是CPM无机部分水溶性离子的主要成分。
