FLY AND BOTTOM ASH

 

 

 

         The ECOBIK® influence of the resulting products of combustion was evident in all applications tested.

         In all cases, the quantities of fly and bottom ash with ECOBIK® were lower than before ECOBIK®, and parameters that changed were: pH being always changed towards a value closer to neutral pH and the quantity of carbon in ash was always reduced.

         The quantities of certain elements resulting from the combustion were lowered in the following way:

 

         For combustion of heavy liquid fuels (removed deposits were analyzed):

            - total sulfur by 60%;

            - dioxide of silica by 25%;

            - calcium oxide by 90%;

            - magnesium oxide by 90%;

            - sodium oxide by 75%;

            - potassium oxide by 50%;

            - vanadium oxide by 85%;

 

         For coal combustion, interesting findings of the fly and bottom ash were obtained, especially changes in the amounts of some heavy metals within fly and bottom ash, for example:

 

Metal Fly Ash % Bed Ash % Explanation
Aluminium [Al](ppm) -25,00 -20,00 Less acid attack on masonry & mortars
Chromium [Cr](ppm) -17,00 1222,00 Drove to Bed Ash
Copper [Cu](ppm) -31,00 1117,00 Drove to Bed Ash
Iron [Fe](ppm) -11,00 0,03 Less corrosion / erosion
Lead [Pb](ppm) 0,70 1371,00 Drove to Bed Ash
Manganese [Mn](ppm) -30,00 700,00 Drove to Bed Ash
Nickel [Ni](ppm) -28,00 894,00 Tubes protection / drove to bed ash
Potassium [K](ppm) -64,00 -65,00 Used in ECOBIK® Process
Zinc [Zn](ppm) -24,00 1100,00 Tubes protection / drove to bed ash
Calcium [Ca](ppm) 64,00 22,00 N.A.
Magnesium [Mg](ppm) 11,10 953,00 Drove to Bed Ash
Arsenic [As](ppb) -87,80 -84,00 Probabely alied with Pb
Mercury [Hg](ppb) -26,35 3,00 Drove to Bed Ash
Selenium [Se](ppb) -64,00 -65,00 Probabely alied with Pb, Zn

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Particulate & heavy metals effects = BONUS

 

 

 

 

 

       

 

 

 

 

 

 

The results are from the combustion of waste bituminous coal, with high levels of sulfur (3% to 5%), initial ash about 50% in fluidized bed combustion.