Open AccessInfluence of Dry Sorbent Injection System on Emission Characteristics of Condensable Particulate Matter in Coal-fired Power Plant
Author(s) -
Ziwei Zhang,
Bing Zhao,
Xi Yan,
Haigang Wang,
Baozhu Zhou,
Qingguo Zhao,
Libin Dong,
Xukai Li,
Xuliang Jin,
Ziwen Zhang,
Meng Zhang,
Lin Ma,
Shendong Li,
Jia Jia,
Chao Xu
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2186/1/012019
Subject(s) - sorbent , particulates , flue gas , coal , chemistry , ion , power station , environmental chemistry , analytical chemistry (journal) , environmental science , materials science , adsorption , organic chemistry , electrical engineering , engineering
To study the effect of dry sorbent injection (DSI) system on the emission characteristics of condensable particulate matter (CPM) in a 600MW unit of an ultra-low emission coal-fired power plant in China, the EPA Method 202A is used to sample the flue gas from its total exhaust. Through sample analysis, the CPM emission concentration and water-soluble ion composition corresponding to the two unit loads and whether the DSI is running are obtained. The results show that the use of DSI system reduces CPM emissions at 600MW and 300MW unit loads, and the CPM emission concentration is reduced by 32% and 9.7%, respectively. For the CPM reduction caused by DSI system under these two loads, SO 4 2- and Cl − together contributed 65.7% and 87.3%, respectively. The DSI system achieves the removal of CPM mainly by removing the SO 3 and HCl, which are gaseous precursors of SO 4 2- and Cl − in CPM. At the same time, water-soluble ions are the main component of CPM. The analysis of its composition shows that the masses of NH 4 + , Cl − and SO4 2- ions are relatively large, and they together account for 95.8%-96.8% of all water-soluble ions mass.