A method for improved and economical wet deposition of mercury from flue gases

摘要

Disclosed is a particularly cost-effective method for improved wet deposition of mercury from flue gases, in which the optionally, a multistage furnace and / or the flue gas in any one of the furnace downstream plant component bromine and / or a bromine-containing compound and / or a mixture of different of bromine-containing compounds is supplied, wherein the temperature upon contact of the bromine compound with the flue gas at least 500°C, the combustion in the presence of a sulfur-containing compound, with the addition of sulfur and / or a sulfur-containing compound and / or a mixture of various sulfur-containing compounds, and then the flue gas in a, optionally multistage, is subjected to washing, characterized in that the washing liquid in at least one of the washing stages - an alkali or alkaline earth metal poly sulfide or a mixture of several alkali - and / or alkaline earth polysulfides is supplied to.