FORFARANDE OCH ANLEGGNING FOR RENING AV INDUSTRIROKGASER OCH FORBRENNINGSAVGASER FRAN SPEC SVAVELDIOXID MED HJELP AV EN VATTENLOSNING AV VETEPEROXID

Improved methods and apparatus for the purification of industrial flue gases, combustion products and gaseous effluents before their rejection to the atmosphere, said gases and effluents containing as impurities especially sulfur oxide and also oxides of nitrogen, sulphuric fogs, dust and soot, said method comprising essentially the steps of: extracting the dust from the gaseous fluid to be purified; proceeding to a chemical purification phase of the gaseous fluid by establishing intimate contact between said fluid and an aqueous solution of hydrogen peroxide at a temperature lower than 80 DEG C.; and carrying out a concentration phase by effecting a direct contact between the gases and the liquid of the gaseous effluents in the hot state, and said liquid being constituted by sulphuric acid formed during said purification phase. The chemical purification phase is carried out on the gaseous effluents when these latter are saturated with water and is effected at a temperature between 55 DEG and 65 DEG C.