| abstract |
Method and installation of steam cracking with flexible charge, this steam cracking installation comprising at least one oven, this oven comprising a radiation zone (1) and a convection zone (2), in which: - the oven is supplied with a charge containing a main charge from the group of naphtha, liquefied petroleum gases, and condensates, - this charge is partially preheated and vaporized in the convection zone, - this partially vaporized charge is separated, outside the furnace, into a current of vapor phase and a liquid phase current, - the steam phase current is steam cracked in the radiation zone, - at least part of the compounds of the liquid phase are subtracted from steam cracking, this process being characterized in that the 'a relatively small amount of a relatively heavy secondary charge current is added to the main charge upstream of the furnace to ensure the presence or increase the flow rate of said pha current gets liquid. |