METHOD FOR SIMULTANEOUSLY REMOVING BY WASHING SO2, NOx AND OPTIONALLY OTHER NOXIOUS SUBSTANCES CONTAINED IN FLUE GASES IN HEATING INSTALLATIONS SUPPLIED WITH FOSSILE FUELS

摘要

The method disclosed utilizes a washing liquid containing, in addition to alkaline and/or alkaline earth ions and ferrous complex compounds, another substance intended to prevent the oxidation of ferrous complex compounds into ferric complex compounds, preferably a monobasic and/or polybasic carboxylic acid and/or an upper alcohol, preferably ethylene glycol, as well as optionally a reduction agent, preferably sodium dithionite, to reduce the iron (III) into iron (II).