Importance

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Abstract

A vertical incinerator has three or more adjacent, stationary, heat-exchange sections which communicate, via respective plenums, with a common high-temperature combustion chamber positioned above them. Inlet and outlet valving to each heat-exchange section is provided and operated so that when effluent from an industrial process is fed upwardly through one of the sections to the combustion chamber, at least one other section is operating in an exhaust mode to withdraw the products of combustion downward through it thereby recapturing some of the generating heat. In order to prevent upwardly moving effluent from substantially short-circuiting the combustion chamber, each section is provided with a cover having an aperture which produces a jet effect. Thus, the relatively low velocity effluent stream from the industrial process applied through the aperture in the cover of the first section has its velocity increased, for example, 3-5 times as it enters the combustion chamber. The effluent moves in jet form toward the top of the combustion chamber causing some turbulent gas movement in the latter and insuring a prescribed minimum residence time for the effluent in that chamber. Thus its noxious components will have been thoroughly oxidized before they are sucked out through a second section operating in the exhaust mode.

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First Claim