raising the capacity moreover some of the cooling medium can be fed in together with the combustible waste whereby if the liquids are not miscible they can be advantageously fed into the furnace in the form of an emulsion in addition to the capacity increase for the incineration of liquid or gaseous waste material the invention also encompasses an increase in the capacity for the incineration of solid waste material the latter is generally done in rotary tube furnaces in such a case the stream of drops of cooling medium generated in the atomizer nozzles mixed with the oxygen rich gas is blown onto the burning material in the area where the waste enters into the furnace as shown in the drawing an incineration installation 10 includes an incineration chamber 12 a burner flame is directed into the incineration chamber through a burner 14 oxygen rich gas is directed into nozzles 16 16 and mixed with a cooling medium 18 18 so that the mixture is injected into the burner flame as illustrated there is at least one pneumatic atomizer nozzle 16 which could be a solid cone nozzle or a flat spray nozzle that generates a stream of drops the oxygen rich gas is employed as the atomizer gas in the nozzles 16 16 and is conveyed into the stream of drops part of the cooling medium may be mixed with the waste gas the inflow tubes of the atomizer 16 16 are at an angle.