Combustion furnace
AssigneeUdo Roos
InventorsJohann Roos, Hans F. Flender
Life of this patent
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Abstract
Industrial furnace for the combustion of solid, liquid, pasty or gaseous fuels, including at least two fluidized beds through which hot gas passes from the bottom, and which are offset in height in the transport direction of the fuel into the combustion chamber according to a reciprocal delimitation one behind the other and in step, after adjusting a mean combustion temperature between preferably 500.degree. and 800.degree. C. It is further possible to recover from household refuse, and/or industrial refuse similar to household refuse, a fraction of fuel rich in energy and low in noxious products by preparation via drum screens, hammer mills, and sliding plate and rod screens of a particulate size between 120 and 500 mm.
Claims12
An industrial furnace, having a combustion chamber, for the combustion of solid, liquid, pasty or gaseous fuel, said furnace also having a fuel inlet, and gas and ash outlet means, and comprising:
- at least two fluidized beds through which hot gas flows from below, and over which said fuel passes;
- in the direction of transport of fuel in said combustion chamber, said fluidized beds of inert material being disposed one after the other in inherently stable condition just below point of fluidation so that mixing of fuel and bed material is avoided whereby the fuel is conveyed by introduced combustion air over the fluidized beds, said fluidized beds being separated from one another, and being offset in height so as to be stepped so that an average combustion temperature is set in a range between 500.degree.-800.degree. C., said fluidized beds being filled with material having a higher specific weight than does said fuel.
Dependencies are inferred from the claim text.