Fired heater

Details Fired heater Fired heater

2006-11-01

2009-02-03

Wilson, Gregory A (Department: 3749)

Liquid heaters and vaporizers

Fire tube

C122S075000, C122S121000, C122S235130

Reexamination Certificate

active

07484478

ABSTRACT:
Two improvements for heaters are disclosed which can be implemented as either apparatus or method. First is a novel flue gas injection system. Second is a novel burner configuration. The improvements can be used alone or together. In the flue gas injection system, flue gas is injected between the burners and the tubes to reduce heat flux on the tubes and shift part of the heat duty from the radiant to the convective section. These approaches work toward increasing the capacity of heaters where we can increase the firing rate in the heater and still keep the tube metal temperature and radiant fluxes within acceptable limits.

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