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US 4,378,745 AGranted
Method and furnace for incineration of solid and liquid waste
AssigneeNorsk Hydro a.s.
InventorTorkjell Flatland
Life of this patent
Estimating the term…
Abstract
An incinerator includes primary and secondary combustion zones, the two zones being connected via an intermediate section having an interior in the form of a restricted annular space. The inner surface of the annular space is perforated, and secondary combustion air is introduced into the annular space through these perforations, whereby combustion gases and air under violent rotation expand into an enlarged secondary combustion zone.
Claims8
A method for the incineration of solid and liquid waste, said method comprising:
- providing a primary combustion zone, a secondary combustion zone, and a restricted annular space extending from said primary combustion zone to said secondary combustion zone, with the area of said annular space being less than the areas of said primary and secondary combustion zones, and with said annular space having an inner surface defined by a substantially cylindrical central member having a height greater than its diameter;
- conducting primary combustion of waste in said primary combustion zone, thereby generating products of combustion including unburned combustibles and incombustible particles;
- passing said products of combustion from said primary combustion zone, smoothly through said annular space, toward said secondary combustion zone;
- introducing secondary combustion air, in a quantity sufficient to achieve complete combustion of said unburned combustibles, into said annular space in the form of high velocity air jets from a plurality of openings in said central member;
- introducing said secondary combustion air and said products of combustion into said secondary combustion zone under conditions of violent rotation and expansion, and thereby achieving mixing of said secondary combustion air and said unburned combustibles in said secondary combustion zone, and causing said incombustible particles to be thrown outwardly through an outlet and discharged from said secondary combustion zone;
- conducting secondary combustion of said unburned combustibles in said secondary combustion zone;
- and
- collecting said discharged incombustible particles in an ash pit separate from said combustion zones.
5 more elements
An incinerator for the incineration of solid and liquid waste, said incinerator comprising:
- a primary combustion zone for the primary combustion therein of waste and for the generation of products of combustion including unburned combustibles and incombustible particles;
- a secondary combustion zone for the secondary combustion therein of said unburned combustibles;
- a restricted annular space within an intermediate zone extending from said primary combustion zone to said secondary combustion zone for passing said products of combustion from said primary combustion zone to said secondary combustion zone, said annular space having an inner surface defined by a substantially cylindrical central member having a height greater than its diameter, the area of said annular space being less than the areas of said primary and secondary combustion zones;
- a plurality of opening means in said central member for introducing into said annular space secondary combustion air, in a quantity sufficient to achieve combustion of said unburned combustibles, in the form of high velocity air jets, thereby for causing said secondary combustion air and said products of combustion to be introduced into said secondary combustion zone under conditions of violent rotation and expansion, and thus for achieving mixing of said secondary combustion air and said unburned combustibles in said secondary combustion zone and causing said incombustible particles to be thrown outwardly;
- and
- outlet means in said secondary combustion zone for receiving said outwardly thrown incombustible particles and for discharging said incombustible particles outwardly from said secondary combustion zone.
3 more elements
Dependencies are inferred from the claim text.