A METHOD AND APPARATUS FOR SUPPLYING A CRYOGENIC STREAM WITH A CONTROLLED TEMPERATURE FROM A BACK-UP SYSTEM

摘要

In a method for temperature-controlled delivery of the gaseous product at temperatures at or below ambient in the event of an air separation unit failure, a first portion of a stored cryogenic liquid product is sent to the back-up vaporizer and heated to ambient conditions, and a second portion (24) of stored cryogenic liquid product, which is at the cryogenic storage temperature, bypasses the back-up vaporizer using a bypass line controlled by a bypass valve (30) and is mixed with the vaporized gas. This mixed stream will then preferably go through a static mixer (40) in order to get to a homogenous temperature that is below the ambient temperature.