Efficient cracking furnace system with reduced emission of co2
AssigneeTechnip Energies France
InventorsYong Wang, Fanxu Meng, Joel Guillaume
Life of this patent
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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).
Claims12
1-8. (canceled)
A method for cracking hydrocarbon feedstock in a cracking furnace system, the method comprising:
- preheating a feedstock in a convection section at a temperature between 50° C. and 180° C.;
- mixing the hydrocarbon feedstock after preheating with a diluent to form a mixed feedstock-diluent;
- preheating the mixed feedstock-diluent in a secondary transfer line exchanger at a temperature between 250° C. and 700° C.;
- cracking the mixed feedstock-diluent after preheating in the radiant section by oxygen or oxygen enriched air combustion to produce cracked gas;
- cooling the cracked gas in a primary transfer line exchanger;
- cooling the cracked gas exiting the primary transfer line exchanger further in the secondary transfer line exchanger;
- and
- producing a saturated super high-pressure steam in the primary transfer line exchanger.
Dependencies are inferred from the claim text.