Furnaces – With fuel treatment means – Preliminary refuse treatment means
Patent
1974-10-16
1976-02-03
Sprague, Kenneth W.
Furnaces
With fuel treatment means
Preliminary refuse treatment means
110 8A, 110 49R, F23G 512
Patent
active
039358240
ABSTRACT:
Disclosed is a method of combusting hydrocarbon containing materials and equipment suitable for practicing the method in which the materials are burned in a closed chamber at a temperature significantly above the autogenous ignition temperature of the hydrocarbons and the resulting gases exhausted to a separation and classification chamber where additional oxygen is admitted to the high temperature gases to create a secondary combustion zone in the classification chamber. The light hydrocarbon and particulate free gases are allowed to escape from this chamber by thermal convection through a barometrically dampered exhaust stack. All other gases are mechanically induced to return or recycle to the combustion chamber and to enter it at a temperature at least as high as the autogenous ignition temperature of the hydrocarbons. The entire system is operated at a negative pressure and air is admitted to the system only as a result of the pressure differential maintained between the system and the external atmosphere.
The port through which the gases exhaust from the combustion chamber to the classification chamber is a venturi and the zone between this venturi and the separation and classification chamber is a zone of reduced pressure. Pressure is further reduced in this zone by withdrawing some of the gases therein through a by-pass to a fan unit which injects them into the gases recycling to the combustion chamber.
REFERENCES:
patent: 1679909 (1928-08-01), Michael et al.
patent: 3485191 (1969-12-01), Christman
patent: 3538865 (1970-11-01), Lausmann
patent: 3749031 (1973-07-01), Burden, Jr.
patent: 3777679 (1973-12-01), Przewalski
patent: 3815523 (1974-06-01), Gibeault
patent: R24844 (1960-07-01), Bouchard
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