Method and device for reducing the acidic pollutant emissions of industrial installations

Abstract

The invention relates to a method for reducing the acidic pollutant emissions, in particular the sulfur trioxide emission, of industrial installations with at least one burner for the combustion of liquid fossil fuels. In particular, the invention relates to flue gas neutralization in the combustion of heavy oils. According to the invention, it is proposed that, before the combustion, an emulsion of the fuel with a solution of a magnesium-containing active ingredient or a magnesium compound is formed, and led into the burner.

1 . Method for reducing the acidic pollutant emissions, particularly the sulfur trioxide emission, of industrial installations with at least one burner for burning liquid fossil fuels, characterized in that, before the combustion, an emulsion of the fuel is formed with a solution of a magnesium-containing active ingredient or a magnesium compound, and led into the burner.  
     
     
         2 . Method for reducing the acidic pollutant emissions, in particular the sulfur trioxide emission, of industrial installations with at least one burner for burning liquid fossil fuels, characterized in that, before the combustion, an aqueous solution of a water soluble magnesium-containing active ingredient or a magnesium compound is introduced into the fuel.  
     
     
         3 . Method according to  claim 1 , characterized in that the solution is introduced into the fuel at high pressure.  
     
     
         4 . Method for reducing the acidic pollutant emissions, in particular the sulfur trioxide emission, of industrial installations with at least one burner for burning liquid fossil fuels, characterized in that, an aerosol of an aqueous solution of a water soluble magnesium compound is introduced into the combustion gases.  
     
     
         5 . Method according to  claim 4 , characterized in that the aerosol is introduced into the combustion gases at several places along the circumference of the combustion pipe, with the formation of an umbrella of the aerosol, which covers the cross section at least approximately completely.  
     
     
         6 . Method according to one of claims  1 - 5 , characterized in that the magnesium-containing active ingredient or the magnesium compound is, or contains, a salt of an organic or inorganic acid.  
     
     
         7 . Method according to one of claims  1 - 6 , characterized in that the magnesium containing active ingredient or the magnesium compound contains magnesium nitrate and/or magnesium acetate.  
     
     
         8 . Device for reducing the acidic pollutant emissions, particularly the sulfur trioxide emission, of industrial installations, with one or a multitude of burners for burning liquid fossil fuels, characterized in that at least one, and preferably each, burner is associated with a metering device ( 10 ) and a feed device ( 8 ), which opens into the fuel line ( 9 ) and which leads, into the liquid fuel, a solution of a magnesium compound from a central supply container ( 5 ) with formation of an emulsion with the fuel.  
     
     
         9 . Device according to  claim 8 , characterized in that the introduction device opens into the fuel line in the flow direction of the fuel downstream from the fuel reconduction.  
     
     
         10 . Device according to one of claims  8  or  9 , characterized in that the feed device opens into the fuel line in the flow direction of the fuel a short distance upstream from the burner nozzle.  
     
     
         11 . Device according to one of claims  8 - 10 , characterized in that the solution is led under pressure into each burner, and in that each metering device comprises an adjustment valve ( 10 ).  
     
     
         12 . Device for the reduction of the acidic pollutant emissions, in particular the sulfur trioxide emission, of industrial installations, with one or a multitude of burners for burning liquid fossil fuels, characterized in that in at least one, and preferably in each combustion pipe and/or flue gas duct and/or boiler passage, at least one nozzle ( 11 ) with pressurized air inlet ( 12 ) is arranged, which nozzles are supplied from a central delivery container ( 5 ) with a solution of a magnesium compound, which solution is introduced into the combustion gases through a nozzle with pressurized air and with the formation of an aerosol.