| US 7,587,994 B2 | ||
| Arrangement in recovery boiler | ||
| Antti Raukola, Kangasala (Finland); Kari Haaga, Tampere (Finland); and Aki Hakulinen, Tampere (Finland) | ||
| Assigned to Kvaerner Power Oy, Tampere (Finland) | ||
| Filed on May 23, 2006, as Appl. No. 11/439,383. | ||
| Claims priority of application No. 2055279 (FI), filed on Jun. 02, 2005. | ||
| Prior Publication US 2006/0288963 A1, Dec. 28, 2006 | ||
| Int. Cl. F22B 1/18 (2006.01) | ||
| U.S. Cl. 122—7R [122/470] | 8 Claims |
| 1. 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.
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