High purity nitrogen gas generator

Details High purity nitrogen gas generator High purity nitrogen gas generator

1996-07-24

1997-06-17

Kilner, Christopher

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62913, F25J 304

Patent

active

056386990

ABSTRACT:
A high purity nitrogen gas generator is provided which can be rapidly returned to a stable state when boil-off gas is generated in a liquid nitrogen storage tank 10. The high purity nitrogen gas generator includes a liquid nitrogen storage tank 10, a rectification column 7, a liquid nitrogen introduction pipe P15 for supplying liquid nitrogen from the liquid nitrogen storage tank to the rectification column, an inverted U-type pipe P13 whose upper end is positioned at a height in the vicinity of the top portion of said liquid nitrogen storage tank connected to the bottom portion of said liquid nitrogen storage tank 10, said liquid nitrogen storage tank 10 and said liquid nitrogen introduction pipe P15 being connected with each other by way of said inverted U-type pipe, the upper end of the inverted U-type pipe and the top portion of said liquid nitrogen storage tank are connected with each other by means of a pipe P17 and a control valve V3 provided on the way of said pipe P17.

REFERENCES:
patent: 4671813 (1987-06-01), Yoshino
patent: 4698079 (1987-10-01), Yoshino
patent: 5058387 (1991-10-01), Kamrath
patent: 5084081 (1992-01-01), Rohde
patent: 5157927 (1992-10-01), Darchis et al.
patent: 5333463 (1994-08-01), Garnier et al.
patent: 5355680 (1994-10-01), Darredeau et al.
patent: 5373699 (1994-12-01), Gastinne et al.

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