Furnaces – With fuel treatment means – Preliminary refuse treatment means
Patent
1974-03-18
1976-02-17
Sprague, Kenneth W.
Furnaces
With fuel treatment means
Preliminary refuse treatment means
110 8A, 110 8P, 110 10, 110 14, 110 49R, F23G 512, F23G 506
Patent
active
039384497
ABSTRACT:
Solid wastes are dumped into a receiving pit and a conveyor transfers them to a separate station where salvage operations are performed. Adjacent the salvage station a saw cuts waste wood to manageable lengths, which is conveyed with the other wastes to a shredder for reduction in size, after which the entire waste batch passes through a magnetic separator where magnetically attractable materials are removed. A waste oil burner removes combustibles adhering to the magnetic materials. The sized wood and other solid wastes may then be optionally passed through a further sizing mill as well as further dehydration and then transported to one of a plurality of silos for temporary storage. Each silo can deliver wastes to any one of several rotary kilns. The kilns are operated at their input end in low oxygen with temperature control effected by feedback flue gases. Waste oils are the ignition fuel with hot air from an economizer promoting auto-ignition. Stoichiometric combustion occurs here with the temperature held below 2200.degree.F. to prevent production of harmful nitrogen oxide gases. After passing the kiln hot gases through a steam generator, they are fed back to several different stations in the facility to preheat and dehydrate the waste materials. As a final step, the gaseous output from the kilns is sent to a scrubber and thence to evaporation ponds where solid material from the gases is deposited. Heat from the process is used to generate steam for external utilization.
REFERENCES:
patent: 3310009 (1967-03-01), Jacobs
patent: 3515078 (1969-03-01), Maitilasso
patent: 3589313 (1971-06-01), Smith et al.
patent: 3604375 (1971-11-01), Bruns et al.
patent: 3685467 (1972-08-01), Morrill
patent: 3725538 (1973-04-01), Brewer
patent: 3734036 (1973-05-01), Abos
patent: 3741890 (1973-06-01), Smith et al.
Frisz James O.
Price Harold A.
Netter George J.
Sprague Kenneth W.
Watson Industrial Properties
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