US 6,257,156 B1Granted

Wind box for a chemical recovery furnace

AssigneeOsmo Kaulamo Engineering Oy

InventorOsmo Kaulamo

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Abstract

The present document describes a wind box used in the air supply of a chemical recovery furnace, the wind box comprising a frame (1) having at least one air inlet opening (2) and at least one air supply opening (3) through which air is led from an air channel via the wind box to the recovery furnace. The wind box further comprises at least one combined actuator (25) for regulating the air flow through the wind box and for cleaning each air supply opening (3) as well as means (19, 21) for moving each actuator (25). The invention is based on using a cleaning head (15) smaller than the air supply opening (3) when cleaning the air supply opening (3), whereby its path instead of a longitudinal motion is determined to be curved such that one to and from motion of the cleaning head will rub of all deposit from both the upper and the lower edge of the air supply opening (3) and also from the area between these.

Claims11

Dependent claims

A wind box intended for the air supply of a chemical recovery furnace, comprising

a frame (1) having at least one air inlet opening (2) and at least one air supply opening (3) for taking air through the frame (1) to the recovery furnace,
at least one at least partly curved guide way (14) which is connected to the frame,
at least one actuator (25) which is arranged to be movably supported against the guide way (14) for regulating the air flow through the frame (1) and for cleaning each air supply opening (3), and
means (19, 21) connected to the actuator (25) for moving the actuator (25) along the guide way (14),
characterized in that
each guide way (14) comprises both a section curved in a first direction and a section curved in a second direction, and
the actuator (25) is arranged to be supported against each guide way (14) at least two points deviating in the direction of the guide way (14),
whereby the direction of the actuator (25) follows the direction of the guide way (14) when the actuator (25) is moved along the guide way (14).

5 more elements

Dependencies are inferred from the claim text.