Heating – Processes of heating or heater operation – Including melting – vaporizing – sintering – expanding...
Patent
1990-10-12
1993-02-09
Yuen, Henry C.
Heating
Processes of heating or heater operation
Including melting, vaporizing, sintering, expanding...
432 59, 432205, 110246, F27B 1400
Patent
active
051849500
ABSTRACT:
A process for the decontamination of a solid product polluted by a contaminant which can be vaporized by heating under vacuum, and devices for carrying out such a process, wherein the product is introduced into a heating and evacuating enclosure (3, 37, 72), said product is heated, substantially in bulk, within a given temperature range, a vacuum being created in said enclosure which is sufficient to reduce the pressure of the enclosure below the vaporization threshold of the contaminant within said temperature range, said temperature and reduced pressure conditions in the enclosure are maintained for a sufficient time to vaporize substantially all the contaminant contained in said product, the vaporized contaminant is extracted by sucking the atmosphere out of the enclosure, and said contaminant which has been sucked out is condensed.
REFERENCES:
patent: 3025044 (1962-03-01), Giler
patent: 4086050 (1978-04-01), Luiten et al.
patent: 4430055 (1984-02-01), Sugiyama
patent: 4490111 (1984-12-01), Yakura
patent: 4715965 (1987-12-01), Sigerson et al.
patent: 4938689 (1990-07-01), Macocco et al.
Fraysse Guy
Thauront Jacques
PEC Engineering
Yuen Henry C.
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