Burning of blended waste-derived supplemental fuel for improved manufacture of cement
AssigneesCadence Environmental Energy, Inc., Ash Grove Cement Company
InventorsTheodore J. Reese, Eric R. Hansen, Michel R. Benoit
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Abstract
A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homogenate, packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
Claims19
A method for achieving environmentally sound disposal of solid waste having volatile and non-volatile components in an operating rotary kiln comprising a heated, rotating cylinder containing in-process mineral material, said method comprising the steps of blending the waste to form a waste blend, processing the waste blend to retard the rate of release of volatile components and charging the processed waste blend into the kiln to contact the mineral material at a point along the length of the kiln cylinder wherein the kiln gas temperature is sufficient to decompose volatile components Of the waste blend.
An improved method for recovery of energy values from solid wastes in an operating rotary kiln comprising a heated, rotating cylinder containing mineral material, said method comprising the steps of blending the waste to form a waste blend, processing the waste blend to retard the rate of release of volatiles and charging the waste blend into the kiln to contact the mineral material at a point along the length of the kiln cylinder where the kiln gas temperature is sufficient to decompose volatile components of the solid waste.
Dependencies are inferred from the claim text.