October 2021

Heat Transfer

CCR heater convection section bottom tubesheet design improvements

Continuous catalytic reforming (CCR) is a general reforming process used in the petroleum refining industry.

Kulkarni, M., BASF; Subrahmanyam, M., Technip Energies

Continuous catalytic reforming (CCR) is a general reforming process used in the petroleum refining industry. The process fired heater plays an important role in this process. Fired heaters consist of heat transfer, convection and radiation coils. The radiant section is typically used for process heating, while the convection section is typically used for heat recovery and steam generation. Convection coils have horizontal tubes that are supported on refractory-lined end tubesheets (plated construction) and cast intermediate tubesheets.  In the typical installation of a CCR heater convection bottom section, multiple cast intermediate tubesheets are used to support coil banks. The bottom tube

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