Collection and Generation of Sulfuric Acid Aerosols in a Wet Electrostatic Precipitator

被引:53
作者
Anderlohr, C. [1 ]
Brachert, L. [1 ]
Mertens, J. [2 ]
Schaber, K. [1 ]
机构
[1] Karlsruhe Inst Technol, ITTK, D-76131 Karlsruhe, Germany
[2] Laborelec, Linkebeek, Belgium
关键词
PULSED CORONA DISCHARGE; FLUE-GAS; REMOVAL; SO2; OPERATION; OXIDATION; DIOXIDE; ELPI+;
D O I
10.1080/02786826.2015.1008624
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Wet electrostatic precipitators (WESPs) are considered to be a possible technology for the control of sulfuric acid mist. The performance of a lab-scale WESP was investigated as a precipitator for sulfuric acid aerosol droplets produced under controlled conditions in a pilot plant. It was found that for higher levels of residual SO2 in the flue gas, WESP collection efficiencies were greatly reduced due to aerosol formation inside the WESP. Investigations showed a strong correlation of aerosol emission from the WESP with incoming SO2 concentration and operating voltage. It is suspected that the reactive species produced in the nonthermal plasma of the corona discharge oxidize the SO2 to SO3 which forms sulfuric acid. This causes supersaturation with subsequent homogeneous nucleation and thus aerosol formation.
引用
收藏
页码:144 / 151
页数:8
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