Methods for heat integration of a hydrocarbon upgrading system including an electrified furnace

A method of upgrading a feed stream, comprising:

• introducing dilution steam to the feed stream, thereby forming a feed mixture;
• preheating the feed mixture;
• upgrading the feed mixture in an electrified hydrocarbon upgrading furnace to form a cracked gas effluent, wherein the electrified hydrocarbon upgrading furnace comprises one or more electrical heating elements for upgrading the feed mixture;
• at least one of:
• introducing the feed stream to a second heat exchanger prior to introducing the dilution steam to the feed stream, wherein a steam drum is fluidly connected to the second heat exchanger for transferring steam to the second heat exchanger and steam condensate back to the steam drum, or
• introducing the feed mixture to a third heat exchanger, thereby preheating the feed mixture, wherein the steam drum is fluidly connected to the third heat exchanger for transferring the steam to the third heat exchanger and the steam condensate back to the steam drum;
• and
• introducing the cracked gas effluent to a first heat exchanger, thereby cooling the cracked gas effluent to a temperature in the range of 500° C. to 700° C., wherein:
• the steam drum is also fluidly connected to the first heat exchanger for transferring the steam condensate to the first heat exchanger and saturated steam back to the steam drum, thereby forming a closed heat exchange loop along with the second heat exchanger, the third heat exchanger, or both, and
• the steam condensate transferred to the first heat exchanger is at a pressure in the range of 1 bar to 50 bar.