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US 11,719,433 B2Granted
Velocity damper for a recovery boiler
AssigneeAndritz Inc.
InventorsJohn Phillips, David Watson
Life of this patent
Estimating the term…
Abstract
A damper for a furnace, the damper including an air port damper body engaged to an air port opening of a furnace; and at least one velocity plate in hinged engagement to the air port damper body so that an air controlling end surface of the at least one velocity plate is substantially aligned to a wall of the furnace at the air port opening when the at least one velocity plate is in a fully opened position.
Claims14
A damper for a furnace, the damper comprising:
- an air port damper body engaged to an air port opening of the furnace, the air port opening disposed at an air inlet of the furnace;
- and
- two velocity plates in hinged engagement to the air port damper body and configured to move symmetrically to control air flow into the furnace such that air controlling end surfaces of the two velocity plates are substantially aligned to a wall of the furnace at the air port opening such that the air controlling end surfaces are positioned at the wall of the furnace when the two velocity is plates are in a fully opened position.
A method for controlling airflow into a furnace comprising:
- engaging a velocity type damper to an air port opening disposed at an air inlet of a furnace, in which the velocity type damper includes two air controlling surfaces that are engaged to an air port damper body and configured to move symmetrically to control airflow into the furnace such that the air controlling end surfaces of the velocity type damper are positioned at a wall of the furnace at the air port opening when the two air controlling surfaces are in a fully opened position so that air velocity exiting the two air controlling surfaces is substantially equal to the air velocity entering the air port opening to the furnace;
- and
- adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.
Dependencies are inferred from the claim text.