摘要 |
<p>An apparatus for use in the pulp industry for recovering heat in the spent liquor recovery boiler, whereby the boiler walls (12, 14) are formed of water-cooled tubes connected to the water/steam circulation system of the boiler. Supply of air into the lower section (22) of the furnace is effected symmetrically through air ports (44, 45), which are disposed at equal distances from the center (47) of the furnace. The lower section (22) of the furnace is preferably cylindrical and connected to a separate cooling medium circulation system (23).</p> |