Chamber and process for thermal treatment comprising a cooling p

Details Chamber and process for thermal treatment comprising a cooling p Chamber and process for thermal treatment comprising a cooling p

1990-04-12

1992-03-24

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

Spraying of cryogen

62434, F25D 1702

Patent

active

RE0338524

ABSTRACT:
A treatment chamber for a charge comprises at least oen door, internal walls delimiting a treatment space, passages for the recirculation of gas, and apparatus for circulating gases in the treatment space and the passages. The circulating apparatus extracts the gases from the treatment space (4) and sends them through the passages (9,9'). The chamber is provided with injectors (12) for cryogenic fluid and an outlet (16) for evacuation of gas. The injectors are at least one nozzle (12) to spray liquid nitrogen or carbon dioxide and are disposed adjacent the circulating apparatus, which is in the form of a fan (8), the injectors (12) being directed toward the inlet of this fan. In the corresponding treatment process, a cryogenic gas is circulated through the charge, a cryogenic fluid e.g. liquid carbon dioxide or liquid nitrogen is injected into the gas flow leaving the charge, and the cooled gas is recirculated so as to cause it to pass again through the charge in the same direction. All contact between the gas and the charge is prevented during its recirculation.

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patent: 4481782 (1984-11-01), Mukerjee
patent: 4485641 (1984-12-01), Angelier et al.
patent: 4580409 (1986-04-01), Angelier et al.
patent: 4644754 (1987-02-01), Gibot

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