Abrégé

A waste treatment system is disclosed having: (1) a pyrolyzer comprising an inner and outer chamber, wherein the inner chamber further comprises a syngas outlet; (2) a thermal oxidizer comprising an elongated combustion chamber; (3) an exhaust gas transfer duct fluidly coupled to the combustion chamber of the thermal oxidizer and the outer chamber of the pyrolyzer; and (4) a particulate separator for removing particulates from the syngas. In preferred embodiments the pyrolyzer and the thermal oxidizer are aligned in piggybacked configuration, such that the hot exhaust gases from the thermal oxidizer are shunted back to the outer chamber of the pyrolyzer. Preferred thermal oxidizer and the exhaust gas transfer duct are configured to allow a three second residence time of the syngas, such that the system operates at an efficiency of at least 15 therms (thm) per ton of municipal waste.

Classes IPC  ?

• F23G 5/00 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres

Abrégé

A burner cone has protrusions that facilitate turbulence of combustion gases. Such cones can advantageously be utilized in thermal oxidizers that receive syn gases from pyrolyzing municipal or other wastes. Preferred cones have a frustoconical shape and numerous protrusions and associated openings. Use of such cones in thermal oxidizers can significantly increase the efficiency of oxidizing syn gases produced by pyrolyzing municipal and other wastes.

Classes IPC  ?

• F23G 5/12 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres comportant un chauffage supplémentaire utilisant un combustible gazeux ou liquide

Abrégé

A pyrolyzer has a heated inner housing that includes first and second conveyors. Preferred conveyors have independent or at least potentially independent flows of material to be pyrolyzed. All suitable conveyors are contemplated, including especially screw conveyors, or combination of screw and paddle conveyors. Both first and second conveyors can be disposed within a common lumen, with a partial divider between them. An alternative divider is also contemplated that more or less divides the inner housing into two lumens. Thus, the lumens can be entirely distinct, or can have cross-flow of gasses and/or material being pyrolyzed. Heat transfer fins can be advantageously attached, extend from, or be otherwise coupled to the inner housing to assist in transfer of heat into the lumen(s) of the inner housing.

Classes IPC  ?

• F23G 5/00 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres
• F23G 7/00 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets particuliers ou de combustibles pauvres, p. ex. des produits chimiques

Abrégé

A pyrolysis waste treatment system having a pyrolyzer and a thermal oxidizer that are aligned in a partially or completely piggybacked fashion, and heat from the exhaust gas of the thermal oxidizer is shunted back to the pyrolyzer to help sustain pyrolysis. Such conduits can have any suitable configuration, including for example where the conduit extends from sides (as opposed to the ends) of each of the pyrolyzer and the thermal oxidizer. Contemplated pyrolyzers and the thermal oxidizers can have any suitable dimensions, but are preferably at least 5 meters long, and have a cross sectional area of at least 10 m2. In most contemplated embodiments, the thermal oxidizer has a length within 20% of the length of the pyrolyzer.

Classes IPC  ?

• F23G 5/12 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres comportant un chauffage supplémentaire utilisant un combustible gazeux ou liquide

Abrégé

A pyrolysis device has a pyrolyzer (retort) and a thermal oxidizer, each with its own burner, but coupled so that the burner of the pyrolyzer can be down-regulated as heat from the thermal oxidizer is used to hear the pyrolyzer. One or more automatic controllers preferably adjust a burn rate of the extrinsic gas by the first burner as a function of a rate at which heat is transferred from the thermal oxidizer to the pyrolyzer. In preferred embodiments, the burn rate of the extrinsic gas can be adjusted to ≤ 50%, ≤ 30% or even lower relative to a base rate that would be required to pyrolyze the waste without the heat thermal oxidizer.

Classes IPC  ?

• F23G 5/12 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres comportant un chauffage supplémentaire utilisant un combustible gazeux ou liquide