This work presents experimental and modeling results on SO2 and combustion particles’ removal in a pilot-scale wet electrostatic scrubber (WES). The WES unit was operated either as: i) a conventional spray scrubber (WS); ii) with only electrified spraying (CDES), and iii) with electrified spraying and corona pre-charging (OPES) by using a model seawater as absorbing liquid. The experiments indicated a progressive improvement of the SO2 fractional approach to equilibrium by increasing the spray charge density in CDES configurations. Corona pre-charging further increased the SO2 absorption rate of OPES compared with CDES configuration, thanks to the parallel depletion of ionized SO2 on the scrubber walls. The fractional approach to equilibrium increased from around 87% for WS to around 97% for OPES. Similarly, the overall particle capture increased by increasing the spray charge density and the corona pre-charging potential: for WS configuration, the particles’ removal efficiency was negligible, while becoming up to 91% under OPES configuration. CDES provided intermediate performances. Experiments can be described with high accuracy for SO2 absorption in WS and CDES configurations, and for particle capture in OPES configurations. Further efforts are needed to describe the other conditions.
Wet electrostatic scrubbing for flue gas treatment / Di Natale, F.; Carotenuto, C.; Parisi, A.; Flagiello, D.; Lancia, A.. - In: FUEL. - ISSN 0016-2361. - 325:(2022), p. 124888. [10.1016/j.fuel.2022.124888]
Wet electrostatic scrubbing for flue gas treatment
Di Natale F.;Parisi A.
;Flagiello D.;Lancia A.
2022
Abstract
This work presents experimental and modeling results on SO2 and combustion particles’ removal in a pilot-scale wet electrostatic scrubber (WES). The WES unit was operated either as: i) a conventional spray scrubber (WS); ii) with only electrified spraying (CDES), and iii) with electrified spraying and corona pre-charging (OPES) by using a model seawater as absorbing liquid. The experiments indicated a progressive improvement of the SO2 fractional approach to equilibrium by increasing the spray charge density in CDES configurations. Corona pre-charging further increased the SO2 absorption rate of OPES compared with CDES configuration, thanks to the parallel depletion of ionized SO2 on the scrubber walls. The fractional approach to equilibrium increased from around 87% for WS to around 97% for OPES. Similarly, the overall particle capture increased by increasing the spray charge density and the corona pre-charging potential: for WS configuration, the particles’ removal efficiency was negligible, while becoming up to 91% under OPES configuration. CDES provided intermediate performances. Experiments can be described with high accuracy for SO2 absorption in WS and CDES configurations, and for particle capture in OPES configurations. Further efforts are needed to describe the other conditions.File | Dimensione | Formato | |
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