PROCESS AND APPARATUS FOR VAPOUR-PHASE CRACKING OF HYDROCARBONS

摘要

A process and device for the vapour-phase cracking of hydrocarbons in a furnace (10) with rectilinear monopass tubes (12) which are connected to each other at their outlet end by a collector (18). In said collector a limited pre-quenching of the vapour-phase cracking effluent is realised by injecting a colder gaseous medium, said effluent being then fed to quenching means (22). In partiular, the invention makes it possible to increase the output of apparatus used for vapour-phase cracking of hydrocarbons.