B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/341, 53/354
B01D 47/00 (2006.01) B01D 53/34 (2006.01) B01D 53/64 (2006.01) B01D 53/68 (2006.01)
Patent
CA 1242567
ABSTRACT OF THE DISLOSURE The present invention relates to a process for purifying flue gases developed during the combustion of waste materials and containing solids of various compositions as well as pollutant gases and heavy metals in gaseous form, wherein the primarily solid components are removed from the flue gas in a separating system and are collected as fly ashes and wherein the flue gas is washed for the purpose of binding the pollutant gases of the residual solids components, particularly in the slag formed in the combustion process. It is the object of the present invention to provide a process wherein, during flue gas purification, the gaseous heavy metal contaminants as well as the heavy metal contaminants which are present in the fly ash and in the slag in soluble form, can be removed from the flue gas purification process in the most compact form, whilst simultaneously achieving good, or even improved, initial purification of HCl, SO2. NOx. All other residues should be returnable for further use. The remainder of heavy metal com- ponents which are not bound in the slag are isolated from the slag by a subsequent weak acid treatment.
455991
Fetherstonhaugh & Co.
Kernforschungszentrum Karlsruhe G.m.b.h.
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