Furnaces – Process – Incinerating refuse
Patent
1990-12-21
1991-09-24
Bennett, Henry A.
Furnaces
Process
Incinerating refuse
110229, 110234, 110215, 48197A, 48111, F23G 700
Patent
active
050505114
ABSTRACT:
A system for the destruction of organic waste material such as halogenated organic compounds, and related matter. In one embodiment the waste material is reduced with a gaseous reducing agent such as hydrogen above about 600.degree. C., the gaseous products are condensed and cooled in the presence of an aqueous mist at about 5.degree. C., and condensed organic and aqueous material is collected and the aqueous portion recycled into the condensing and cooling steps. In another embodiment, where acid gases (for example, hydrogen halides) are produced during reduction, the gaseous products are condensed in the presence of aqueous mist at about 85.degree. C. and a major portion of the aqueous mist condenses as acidic water which is collected and neutralized. Remaining gaseous components are then cooled to about 5.degree. C. as in the previous embodiment. In further embodiments, the remaining uncondensed gaseous products are oxidized with a gaseous oxidizing agent at a temperature above about 1000.degree. C. The process thus allows destruction of organic waste, recovery of reduced products, and oxidation of unrecovered products. The system includes a reduction vessel wherein hydrogen is used directly in intimate mixing relation with pulverized waste material, and after completion of a residence time sufficient to reduce the organic compounds, the gaseous by-products pass to an adjacent acid recovery and neutralization vessel and/or reduced product recovery vessel and combustor.
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Campbell Kelvin R.
Hallett Douglas J.
655901 Ontario Inc.
Bennett Henry A.
Gromada Denise L. F.
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