Heating of at least two cold oxygen streams, useful to preheat oxygen stream of burner for staged combustion and to preheat primary and secondary oxygen stream, comprises heating the cold oxygen stream by exchanging heat with hot flow

摘要

Process for heating of at least two cold oxygen streams, comprises heating the cold oxygen stream by exchanging heat with a hot flow, where the heat exchange being obtained by circulation of the cold oxygen flow in heat exchanger tubes, and the tubes traversing a zone where the hot fluid is present, the cold oxygen stream are heated by the same heat exchanger comprising at least two separate tube bundles, the first cold oxygen stream is circulating in the first tube bundle and the second cold oxygen is circulating in the second tube bundle.