Publication: Magyar Közlöny
Issue: MK-2007-40 (Year: 2007, Number: 40)
Era: 2004-2010
Section: 
Paragraph Index: 261

13. In the case of particle-bound emissions of Cd, Pb and Hg, the metals can be captured by dust-cleaning devices. Typical dust concentrations after gas cleaning with selected techniques are given in table 1. Most of these measures have generally been applied across sectors. The minimum expected performance of selected techniques for capturing gaseous mercury is outlined in table 2. The application of these measures depends on the specific processes and is most relevant if concentrations of mercury in the flue gas are high. Table 1: Performance of dust-cleaning devices expressed as hourly average dust concentrations Dust con cent ra ti ons af ter cle a ning (mg/m3) Fab ric fil ters <10 Fab ric fil ters, memb ra ne type <1 Dry elect ros ta tic pre ci pi ta tors <50 Wet elect ros ta tic pre ci pi ta tors <50 High-ef fi ci en cy scrub bers <50 Note: Medium- and low-pressure scrubbers and cyclones generally show lower dust removal efficiencies. Table 2: Minimum expected performance of mercury separators expressed as hourly average mercury concentrations Mer cu ry con tent af ter cle a ning (mg/m3) Se le ni um fil ter <0.01 Se le ni um scrub ber <0.2 Car bon fil ter <0.01 Car bon in jec ti on + dust se pa ra tor <0.05 Mer cu ry con tent af ter cle a ning (mg/m3) Odda Nor zink chlo ri de pro cess <0.1 Lead sulp hi de pro cess <0.05 Bol kem (Thi o sulp ha te) pro cess <0.1

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