The role of pressure drop and flow redistribution on modeling mercury control using sorbent injection in baghouse filters.
A mathematical model based on simple cake filtration theory was coupled to a previously developed two-stage mathematical model for mercury (Hg) removal using powdered activated carbon injection upstream of a baghouse filter. Values of the average permeability of the filter cake and the filter resistance extracted from the model were 4.4 x 10(-13) m2 and 2.5 x 10(-4) m(-1), respectively. The flow is redistributed during partial cleaning of the filter, with flows higher across the newly cleaned filter section. The calculated average Hg removal efficiency from the baghouse is lower because of the high mass flux of Hg exiting the filter in the newly cleaned section. The model shows that calculated average Hg removal is affected by permeability, filter resistance, fraction of the baghouse cleaned, and cleaning interval.
Department of Civil and Environmental Engineering, University of South Carolina, Columbia, SC, USA.
Joseph R V
JR
Flora
Richard A
RA
Hargis
William J
WJ
O'Dowd
Andrew
A
Karash
Henry W
HW
Pennline
Radisav D
RD
Vidic
D000327:Adsorption; D000392:Air Movements; D000393:Air Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D002244:Carbon / Q000737:chemistry; D003031:Coal; D005374:Filtration; D008628:Mercury / Q000737:chemistry / Q000302:isolation & purification*; D008962:Models, Theoretical; D010539:Permeability; D010865:Pilot Projects; D011210:Power Plants; D011312:Pressure
D000393:Air Pollutants; D003031:Coal; D002244:Carbon; D008628:Mercury