Apparatus and method for oxygen lancing in a multiple hearth fur

Details Apparatus and method for oxygen lancing in a multiple hearth fur Apparatus and method for oxygen lancing in a multiple hearth fur

1996-10-25

1998-05-19

Ferensic, Denise L.

Furnaces

Process

Incinerating refuse

110211, 110225, 110251, F23G 704

Patent

active

057524521

ABSTRACT:
An improved apparatus and method for efficiently processing material, e.g. incinerating waste material, particularly dewatered waste water sludge, in a multiple hearth furnace by injecting high velocity jets of oxygen into the heating or drying zone of the furnace to augment turbulent gas-phase mixing, to aid in the burnout of carbon monoxide and hydrocarbons in the gas phase to achieve lower emissions, to increase convection over the drying sludge to increase its drying rate, and to ignite the drying sludge to further increase its drying rate. The apparatus and method provides an increase in sludge throughput and a reduction in carbon monoxide, nitrogen oxides and hydrocarbon emissions.

REFERENCES:
patent: 4481890 (1984-11-01), Lewis
patent: 4630555 (1986-12-01), Guillaume et al.
patent: 4957050 (1990-09-01), Ho
patent: 5000102 (1991-03-01), Ho
patent: 5176086 (1993-01-01), Clark et al.

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