Method for removing mercury from flue gases of incineration plants

A process for removing mercury from flue gas from a combustion plant, comprising:

• a) providing an adsorbent selected from a group consisting of activated carbon, activated coke, molecular sieves, carbon molecular sieves and mixtures of the abovementioned adsorbents;
• b) producing an aqueous suspension comprising the adsorbent;
• c) introducing the suspension into a flue gas stream of the combustion plant of the flue gas and loading the adsorbent with mercury over a predetermined reaction path;
• d) keeping the adsorbent loaded with mercury out of the flue gas stream by one or more removal methods selected from a group consisting of a dry offgas purification and a wet offgas purification;
• and
• e) land filling or regenerating the adsorbent loaded with mercury,
• wherein the process comprises a wet flue gas desulfurization, wherein a carbon-enriched adsorbent which is based on brown coal and has been activated in an absence of oxygen is used as the adsorbent according to process step a), in that the introduction of the suspension as per process step c) into a dry, water vapor-undersaturated gas phase of the flue gas is effected upstream, in a flow direction of the flue gas, of the flue gas desulfurization, at a temperature of the flue gas in a range from 100° C. to 220° C.