Economizer system

F - Mech Eng,Light,Heat,Weapons – 22 – D

Patent

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Details

F22D 1/06 (2006.01) D21C 11/12 (2006.01) F22B 1/18 (2006.01) F22B 31/04 (2006.01) F22D 1/02 (2006.01) F28F 9/22 (2006.01)

Patent

CA 2177881

An otherwise conventional recovery boiler for burning black liquor requires less capital investment and takes up less space by constructing the economizers in a particular manner. At least first and second economizers are provided for preheating feed water utilizing flue gas from combustion of the black liquor. The economizers are positioned substantially side-by-side, in the width dimension of the recovery boiler furnace, and connected in such a way that flue gas leaving the first economizer passes in a transverse horizontal direction and then through an intra-economizer flow channel into the second economizer. A boiler bank may be connected between the superheater section of the recovery boiler and the first economizer, and any number of economizers can be utilized.

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