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US 7,111,565 B2Granted
Rotating grate for the combustion of slag producing fuel
OwnerFritz Schoppeinventor
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OwnerFritz Schoppeinventor
Estimating the term…
In a rotating grate having a rotational-symmetrical shape having an axis of rotation which is inclined against a horizontal plane by more than 34°, and which encloses a combustion chamber for the combustion of slag-forming fuel, which is locked on a lower end and is open at an upper end and is defined by meridionally extending carrier arms that are hollow and are connected to a compression air source and are provided with blow openings directed into the combustion chamber, the combustion chamber has a spherical shape, or in the borderline case a cylindrical shape with a radially extending lower front side, the angle of inclination of the axis of rotation against the horizontal is between 36° and 46°, the carrier arms in the combustion chamber are flush with the remaining grate surface, and the inner contour of the combustion chamber encloses an angle of 90° with the axis of rotation in the area of the closed end. Thereby, an intense circulation of the combustible on the rotating grate is caused in operation, which avoids the formation of slag adhering to the grate.
A rotating grate for the combustion of slag producing combustibles, having a rotational-symmetrical shape having an axis of rotation which is inclined by an angle of inclination of more than 34° against a horizontal plane, and which encloses a combustion chamber which is closed at a lower end and is open at an upper end and has an inner grate surface which is delimited by hollow, meridionally extending carrier arms which each have a hollow space which is connected to a common compression air source, each said carrier arm being provided with blow openings directed into the combustion chamber, wherein
A method of operating a rotating grate for the combustion of slag producing combustibles, having a rotational-symmetrical shape having an axis of rotation which is inclined by an angle of inclination of more than 34° against a horizontal plane, and which encloses a combustion chamber which is closed at a lower end and is open at an upper end and has an inner grate surface which is delimited by hollow, meridionally extending carrier arms which each have a hollow space which is connected to a common compression air source, each said carrier arm being provided with blow openings directed into the combustion chamber, and wherein the combustion chamber has one of a spherical shape and, in a borderline case, a cylindrical shape, having a radially extending lower front side, the angle of inclination of the axis of rotation against the horizontal is between 36° and 46°, the carrier arms in the combustion chamber are flush with a remaining grate surface, and the combustion chamber has an inner contour which encloses an angle of about 90° with the axis of rotation in an area of the closed lower end, said method comprising supplying 30% to 40% of combustion air required for a complete combustion of the combustible as underfire blast to the hollow spaces of the carrier arms which are covered by the combustible.
A method as claimed in 12, wherein cooled combustion gas is added to the overfire air.
A method as claimed in 13, wherein cooled combustion gas is added to the overfire air.
Dependencies are inferred from the claim text.