November 2002

Heat Transfer

Understand FCCU heat integration

New configuration minimizes capital cost in some applications

Chen, E., Foster Wheeler

During recent residue fluidized catalytic cracking (RFCC) projects, a new heat recovery configuration was developed to minimize capital investment cost (Fig. 1). A separate CO incinerator replaces the CO boiler combustion chamber in the traditional scheme. The CO-free flue gas from the incinerator then joins with R2 flue gas to the box-type flue gas cooler. Actually, it is a heat recovery boiler that consists of a superheater, evaporator and economizer. Cold flue gas leaves the economizer and goes to the stack via an electrostatic precipitator (ESP) as in a conventional design. A DeSOx unit may be added to remove sulfur ox

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