Velocity damper for a recovery boiler
AssigneeAndritz Inc.
InventorsJohn Phillips, David Watson
Life of this patent
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Abstract
A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace. The method may further include adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.
Claims8
A damper comprising:
- an air port damper body engaged to an air port opening of a furnace;
- and
- at least one diaphragm plate engaged to the air port damper body so that an end of the at least one diaphragm plate is proximate to a wall of the furnace at the air port opening, wherein deforming the at least one diaphragm plate reduces a cross sectional area of the air port damper body.
A method for controlling airflow into a furnace comprising:
- engaging a velocity type damper to an air port opening of a furnace, in which the velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace, wherein the velocity type damper comprises an air port damper body and at least one diaphragm plate, the air port damper body engaged to the air port opening of the furnace;
- the at least one diaphragm plate engaged to the air port damper body so that an end of the at least one diaphragm plate is proximate to a wall of the furnace at the air port opening, wherein deforming the at least one diaphragm plate reduces a cross sectional area of the air port damper body;
- 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.