Importance

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Abstract

A cracking furnace system for converting a hydrocarbon feedstock into cracked gas includes a convection section, a radiant section and a cooling section. The convection section includes a plurality of convection banks configured to receive only a hydrocarbon feedstock and a diluent. The radiant section includes a firebox comprising at least oxygen or oxygen enriched air burners and several radiant coils configured to heat up the feedstock to a temperature allowing a pyrolysis reaction. The cooling section includes at least two transfer line exchangers (TLE), a primary transfer line exchanger (PTLE) and a secondary transfer line exchanger (STLE). The system includes a mixing device for mixing the preheated hydrocarbon feedstock and the preheated diluent. The system is configured such that the hydrocarbon feedstock and diluent mixture is preheated in the secondary transfer line exchanger before entry into the radiant section. The primary transfer line exchanger is configured to generate saturated steam. The system includes a steam drum which is connected to the primary transfer line exchanger.

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First Claim