Method and apparatus for incinerating refuse

Claim 2

Method of incinerating refuse which comprises the steps of introducing refuse at one end of a furnace mounted to rotate about its longitudinal axis within the heating chamber of an incinerator, slowly advancing said refuse along said axis, heating the lateral wall of the furnace, gravitationally extracting from the end of said furnace remote from said one end the cinders formed from the refuse incinerated while simultaneously extracting the gasification gases formed by said refuse by suction means, passing said gases along the lateral wall of the furnace in a direction opposite to that in which the refuse is advanced within the furnace, so that said gases pass by the zone of the furnace wall whiCh is externally heated, extracting the burned gases from said incinerator, and cooling the walls of said heating chamber by means of air circulated therepast by a ventilator, which exhausts said air into a chimney.

Claim 3

Method of incinerating refuse which comprises the steps of introducing refuse at one end of a furnace mounted to rotate about its longitudinal axis within the heating chamber of an incinerator, slowly advancing said refuse along said axis, heating the lateral wall of the furnace, gravitationally extracting from the end of said furnace remote from said one end the cinders formed from the refuse incinerated while simultaneously extracting the gasification gases formed by said refuse by suction means, passing said gases along the lateral wall of the furnace in a direction opposite to that in which the refuse is advanced within the furnace, so that said gases pass by the zone of the furnace wall which is externally heated, said gasification gases being extracted by creating suction at the output of a nozzle positioned in the path of air which cools the heating chamber, and the burned gases being extracted from said heating chamber by the flow of said air and mixed therewith.

Claim 4

Method of incinerating refuse which comprises the steps of introducing refuse at one end of a furnace mounted to rotate about its longitudinal axis within the heating chamber of an incinerator, slowly advancing said refuse along said axis, heating the lateral wall of the furnace, gravitationally extracting from the end of said furnace remote from said one end the cinders formed from the refuse incinerated while simultaneously extracting the gasification gases formed by said refuse by suction means, passing said gases along the lateral wall of the furnace in a direction opposite to that in which the refuse is advanced within the furnace, so that said gases pass by the zone of the furnace wall which is externally heated, said gasification gases being extracted by creating suction at the output of a nozzle positioned in the path of air which cools the heating chamber, and the burned gases being extracted from said heating chamber by the flow of said air and mixed therewith.

Claim 5

Incinerator for refuse which comprises an elongated furnace mounted to rotate about an axis which is more nearly horizontal than vertical, said furnace being connected at its inlet end to means for feeding refuse to be incinerated thereinto and at its outlet end with openings in its lateral wall, together with internal means for advancing the refuse from the input to the outlet end, a heating chamber encircling said furnace and said openings, said heating chamber being equipped with at least one heating means which acts on the wall of the furnace and being in communication with the ambient air through an air inlet duct and through a duct for exhausting burnt gas, said heating chamber being substantially cylindrical and encircled by two concentric jackets, the outer jacket being provided with an air inlet and the interior of the inner jacket being in com-munication with a part of the interior of the outer jacket remote from said air inlet.

Claim 6

Incinerator for refuse which comprises an elongated furnace mounted to rotate about an axis which is more nearly horizontal than vertical, said furnace being connected at its inlet end to means for feeding refuse to be incinerated thereinto and at its outlet end with openings in its lateral wall, together with internal means for advancing the refuse from the input to the outlet end, a heating chamber encircling said furnace and said openings, said heating chamber being equipped with at least one heating means which acts on the wall of the furnace and being in communication with the ambient air through an air inlet duct and through a duct for exhausting burnt gas, said heating chamber being substantially cylindrical and encircled by two concentric jackets, the outer jacket being provided with an air inlet and the interior of the inner jacket being in com-munication with a part of the interior of the outer jacket remote from said air inlet.

Claim 7

Incinerator for refuse which comprises an elongated furnace mounted to rotate about an axis which is more nearly horizontal than vertical, said furnace being connected at its inlet end to means for feeding refuse to be incinerated thereinto and at its outlet end with openings in its lateral wall, together with internal means for advancing the refuse from the input to the outlet end, a heating chamber encircling said furnace and said openings, said heating chamber being equipped with at least one heating means which acts on the wall of the furnace and being in communication with the ambient air through an air inlet duct and through a duct for exhausting burnt gas, said heating chamber being encircled by a jacket which is subjected to suction by a ventilating fan which directs its discharge toward a gas-evacuating chimney.

Claim 8

Incinerator for refuse which comprises an elongated furnace mounted to rotate about an axis which is more nearly horizontal than vertical, said furnace being connected at its inlet end to means for feeding refuse to be incinerated thereinto and at its outlet end with openings in its lateral wall, together with internal means for advancing the refuse from the input to the outlet end, a heating chamber encircling said furnace and said openings, said heating chamber being equipped with at least one heating means which acts on the wall of the furnace and being in communication with the ambient air through an air inlet duct and through a duct for exhausting burnt gas, said heating chamber being encircled by a jacket which is subjected to suction by a ventilating fan which directs its discharge toward a gas-evacuating chimney.

Claim 9

Incinerator as claimed in claim 3 in which the interior of the inner jacket is subjected to suction by a ventilating fan which directs its discharge toward a gas-evacuating chimney.

Claim 10

Incinerator as claimed in claim 5 in which the stream of air produced by the ventilator passes around a nozzle positioned substantially axially of said stream and extending in the same direction, said nozzle being connected to the duct for evacuating burnt gases from the heating chamber.

Claim 11

Incinerator as claimed in claim 4 in which the heating means for the furnace comprises at least one burner positioned in the heating chamber, with the flame of said burner directed toward the lateral wall of the furnace.

Claim 12

Incinerator as claimed in claim 4 in which the furnace is carried at its two ends on rollers, at least one roller being rotatably driven by a suitable motor, and said rollers being positioned outside said outer jacket.

Claim 13

Incinerator as claimed in claim 4 in which the means for feeding refuse is a stationary chute connecteD to one end of the furnace.

Claim 14

Incinerator as claimed in claim 6 in which the means for feeding refuse consists of an elongated pre-dryer rotatably driven about its own axis, said pre-dryer being positioned inside a chamber traversed by the current of burnt gases and air which is driven from the incinerator in the direction of the chimney.

Claim 15

Incinerator as claimed in claim 10 in which the pre-dryer has a substantially horizontal axis and comprises an inwardly projecting helix.

Claim 16

Incinerator as claimed in claim 10 in which the chamber surrounding the pre-dryer through which the burnt gas is circulated is itself located inside a protective jacket.