Combustion – Process of combustion or burner operation – Decarbonizing – cleaning or purging
Patent
1974-12-06
1976-03-09
Sprague, Kenneth W.
Combustion
Process of combustion or burner operation
Decarbonizing, cleaning or purging
23230PC, 23253PC, 23277C, F23D 1138, G01N 3112
Patent
active
039429385
ABSTRACT:
A combustion system for combusting materials containing radioactive nuclides to permit recovery of the radioactive nuclides. The system comprises a primary combustion zone in which the sample material is initially combusted and from which the combustion products are continuously exhausted. The exhaust products from this primary combustion zone are passed through a secondary combustion zone in which uncombusted materials in the exhaust products are combusted. In the secondary combustion zone, the exhaust products from the primary zone are directed in a helical path so that centrifugal forces drive the gases and any particulate matter entrained therein toward the walls of the secondary zone while intimately mixing the materials with each other to achieve rapid and complete combustion. The secondary combustion zone preferably comprises a helical tube which is heated by passing an electric current through the walls thereof. The helical path preferably has a radius of curvature of less than about 1.5 inches and is preferably heated to a temperature of at least 900.degree.C. to achieve the desired condition.
REFERENCES:
patent: 3485565 (1969-12-01), Kaartinen
patent: 3542121 (1970-11-01), Kaartinen
patent: 3682598 (1972-08-01), Kaartinen
patent: 3830628 (1974-08-01), Kaartinen
patent: 3849069 (1974-11-01), Kaartinen
Packard Instrument Company Inc.
Sprague Kenneth W.
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