Patent ID: 7587994

Claim:
An arrangement in a recovery boiler into which spent liquor to be incinerated and combustion air are supplied, the arrangement including: superheaters in the upper part of the recovery boiler, a boiler bank located in a flue gas duct part known as the second pass immediately after the recovery boiler, the boiler bank being formed of a plural number of parallel elements transverse in relation to the flue gas duct in a size substantially equal to the width of the flue gas duct, and at least one economizer for recovering heat in a duct part after the second pass in the recovery boiler flue gas duct, wherein there is provided an economizer, in addition to the boiler bank, in the flue gas duct part, known as the second pass, of the flue gas duct located immediately after the recovery boiler, the boiler bank and the economizer being placed one after the other in the incoming direction of the flue gas.