Cocurrent oxidation method in a multiple hearth furnace

Details Cocurrent oxidation method in a multiple hearth furnace Cocurrent oxidation method in a multiple hearth furnace

1990-10-29

1992-01-14

Yuen, Henry C.

Furnaces

Refuse incinerator

Rotary grate movable about a vertical axis

432139, 110346, F23G 500

Patent

active

050800256

ABSTRACT:
A method of oxidizing feed materials using a multiple hearth furnace comprises the steps of introducing the feed materials to be oxidized on at least the uppermost hearth, introducing fuel/air mixtures in the uppermost hearth to dry and ignite the feed materials, introducing air on at least one hearth to support combustion of the feed materials, allowing the feed materials to move downwardly from hearth to hearth and thereafter to exit the bottom of the furnace, and causing the combustion products formed by oxidation of the fuel and feed materials to be drawn down through the furnace and exhausted from a lower hearth.

REFERENCES:
patent: 1549379 (1925-08-01), Pike
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patent: 2505363 (1950-04-01), Nichols
patent: 3680503 (1972-08-01), Danielsson et al.
patent: 3962128 (1976-06-01), Nelson et al.
patent: 4046086 (1977-09-01), Von Dreusche, Jr.
patent: 4248164 (1981-02-01), Isheim
patent: 4391208 (1983-07-01), Lewis

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