Process for heating a stream for a hydrocarbon conversion process

A reforming process, comprising:

• a) operating a reforming unit comprising:
• i) at least one heater comprising at least one burner for producing heat, a radiant section having at least one radiant section tube, and a convection section having at least one convection section tube in fluid communication with the at least one radiant section tube, and
• ii) a reforming reactor comprising a reaction zone;
• and
• b) without first passing through the at least one convection section tube and before exiting the at least one heater, passing a process fluid stream comprising hydrocarbons through the at least one radiant section tube before the process fluid stream enters and passes through the at least one convection section tube, to an inlet of the reaction zone, wherein
• i) the temperature of the process fluid stream entering the at least one convection section tube is substantially similar to the temperature of the process fluid stream exiting the at least one radiant section tube, and
• ii) the at least one convection section tube receives from about 10% to about 45% of the heat produced by the at least one burner.

A facility consisting of at least one of a refinery and a petrochemical production facility, comprising:

• a) a reforming unit comprising:
• i) a heater comprising a burner for producing heat, a radiant section comprising a first tube, having an inlet and an outlet for receiving and discharging, respectively, a hydrocarbon stream entering the heater, and a convection section comprising a second tube in fluid communication with the first tube of the radiant section, the second tube having an inlet for receiving the hydrocarbon stream at a temperature substantially similar to the temperature of the hydrocarbon stream exiting the first tube of the radiant section, and an outlet for discharging the hydrocarbon stream, the second tube of the convection section receiving from about 10% to about 45% of the heat produced by the burner;
• ii) wherein, without first passing through the second tube of the convection section and before exiting the heater, the hydrocarbon stream passes through the first tube of the radiant section tube before the hydrocarbon stream passes through the second tube of the convection section to an inlet of the reaction zone,
• iii) a reforming reactor comprising a reaction zone wherein the inlet of the reaction zone receives the hydrocarbon stream from the outlet of the second tube of the convection section.