Nitrogen supplying method, involves sending liquid nitrogen towards separating apparatus for partially maintaining cooling of apparatus, during operating period, and conveying liquid nitrogen flow to vaporizer during another period

摘要

The method involves generating nitrogen gas by an air separating apparatus i.e. cold box (9) of a cryogenic generator, and conveying the nitrogen gas to a consumer (12) after being passed in an emergency vaporizer (5). Liquid nitrogen of a liquid nitrogen storage (1) is sent towards the separating apparatus for partially maintaining cooling of the separating apparatus, during an operating period. A liquid nitrogen flow is conveyed to the vaporizer in which it is vaporized and the vaporized liquid nitrogen is conveyed to the customer during another operating period. An independent claim is also included for an apparatus for supplying nitrogen, comprising a liquid nitrogen storage.