Abstract Combustion apparatus for the removal of sulfur oxides from fuels containing sulfur. A first and a second fluidized bed boiler having heat exchange surfaces, that burn the sulfur fuels are positioned adjacent each other with the second bed having less heat exchange surface than the first. Each bed has solid particulate sulfur acceptors that are circulated between the two beds. Heat exchange wall members between the beds semi-isolate them from each other such that there is little or no mixing of the gaseous combustion products from each boiler. The circulation between beds may be accomplished by ports in the exchange wall below the top of the fluidized beds. The end result is the gas emitted to the atmosphere from the beds after additional processing is depleted in sulfur oxides.
The apparatus of claim 1 wherein said second fluidized bed boiler is positioned continguous to said first fluidized bed boiler.
Claim 2
Dependent Claim
45 words
The apparatus of claim 2 wherein said means to prevent mixing of gaseous combustion products produced in the two boilers comprises a heat exchange wall member extending from a point below the top level of the fluidized beds continuously to the top of said boilers.
Claim 3
Dependent Claim
43 words
The apparatus of claim 3 wherein said means to provide circulation of particulate material making up the fluidized beds between said first and second boilers comprise ports in said heat exchange wall member at a location below the top of the fluidized beds.
Claim 4
Dependent Claim
20 words
The apparatus of claim 4, wherein said ports are at a level in the lower hAlf of the fluidized beds.