In thermal cracking of hydrocarbons, especially steam cracking to light olefins, a transfer line heat exchanger unit is provided in which cracked gas flows from a furnace into heat exchange tubes, which comprises a distributor having an inlet for said gas and two or three diverging branches forming with...http://www.google.fr/patents/US4457364?utm_source=gb-gplus-shareBrevet US4457364 - Close-coupled transfer line heat exchanger unit
