Effects of foaming and antifoaming agents on the performance of a wet flue gas desulfurization pilot plant | Zendy

Qin Siqiang | Zendy; Hansen Brian B. | Zendy; Kiil Søren | Zendy

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Effects of foaming and antifoaming agents on the performance of a wet flue gas desulfurization pilot plant

Author(s) -

Qin Siqiang,

Hansen Brian B.,

Kiil Søren

Publication year - 2014

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.14428

Subject(s) - slurry , flue gas desulfurization , foaming agent , chemistry , defoamer , flue gas , pilot plant , waste management , chemical engineering , pulp and paper industry , environmental engineering , environmental science , dispersant , porosity , organic chemistry , engineering , dispersion (optics) , physics , optics

Foaming is a common phenomenon in industrial processes, including wet flue gas desulfurization (FGD) plants. A systemic investigation of the influence of two foaming agents, sodium dodecyl sulphate (SDS) and egg white albumin (protein), and two commercial antifoams on a wet FGD pilot plant operation has been carried out. Foaming caused by 0.03 g SDS/(L slurry) reduced the desulfurization degree from 84 to 74% and the solids and limestone concentrations of the slurry from 58 to 48 g/(L slurry) and from 1.4 to 1.0 g/(L slurry), respectively. These effects were attributed to the foaming transferring small particles to the foam layer present on top of the slurry in the holding tank. The addition of 0.03 g antifoams/(L slurry) to SDS foam eliminated the foam, but the desulfurization degree remained low. Potential mechanisms for the observed behavior are analyzed. © 2014 American Institute of Chemical Engineers AIChE J , 60: 2382–2388, 2014

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