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.

Abstract: A method for treating heterogeneous waste, particularly household garbage and general industrial refuse, e.g. paper, glass or bulk objects such as furniture. The composition of waste supplied to the treating site depends on its source, i.e. household bin or industrial skip, and waste from different sources is supplied through different channels, i.e. by different salvage vehicles. At the site the waste is sorted and treated to obtain selected products e.g. for re-cycling.To facilitate obtaining the products and to cope with the range of waste suppied to the site, a number of separate bunkers are provided, each for waste from a particular source. The bunkers are arranged in an arc, although they could be in block formation and are accessible to salvage vehicles. The jib or boom of a crane or another mechanical device can sweep over the bunkers and transfer seleced waste to one of a number of manual sorting or distributing belts, preferably three, via optional hoppers.