Apparatus for recovering heat in a spent liquor recovery boiler
AssigneeAhlstrom Machinery Inc.
InventorKeijo Raak
Life of this patent
Estimating the term…
Abstract
An apparatus for use in the pulp industry for recovering heat in the spent liquor recovery boiler, whereby the boiler walls are formed of water-cooled tubes connected to the water/steam circulation system of the boiler. Supply of air into the lower section of the furnace is effected symmetrically through air ports which are disposed at equal distances from the center of the furnace. The lower section of the furnace is preferably cylindrical and connected to a separate cooling medium circulation system.
Claims19
Apparatus for use in the pulp industry for recovering heat in a spent liquor recovery boiler comprising:
- a recovery boiler having a furnace and a water steam circulation system, and having boiler walls that are formed of water-cooled tubes connected to said water/steam circulation system;
- a lower section of said boiler furnace in the shape of a vertical cylinder, which is a polygon in cross-section;
- and air ports disposed in said boiler walls of said polygon cross-section lower section, said air ports spaced substantially equal distances from a center point of said furnace lower section;
- and an upper section of said furnace which is a polygon in cross-section.
Apparatus for use in the pulp industry for recovering heat in a spent liquor recovery boiler comprising:
- a recovery boiler having a furnace, and a water steam/circulation system, and having boiler walls that are formed of water cooled tubes connected to said water/steam circulation system;
- a lower section of said boiler furnace in the shape of a vertical cylinder;
- air ports disposed in said boiler walls of said lower section spaced substantially equal distances from a center point of said furnace;
- and
- wherein said lower section of said boiler comprises bottom end walls that are formed as a separate structure, and which is connected to a cooling medium circulation system distinct from said boiler/steam circulation system.
Dependencies are inferred from the claim text.