F - Mech Eng,Light,Heat,Weapons – 23 – L
Patent
F - Mech Eng,Light,Heat,Weapons
23
L
9/37, 110/45
F23L 5/00 (2006.01) F23G 7/04 (2006.01) F23J 3/00 (2006.01) F23L 9/00 (2006.01) F23L 13/00 (2006.01)
Patent
CA 1292149
Abstract Removable apparatus for regulating air flow through an air port in a chemical recovery furnace. A plenum having an adjustable damper is mounted inside a wind box associated with the furnace adja- cent to the an air port and supplies and regulates the flow of air from the wind box to the furnace through the air port. A metal cleaning head having a cage-like configuration is pivotally mounted in a retracted, at-rest position inside the plenum above and adjacent to the air port so as not to interfere with movement of the adjustable damper. The cleaning head is adapted for rotatable insertion into the air port for cleaning excrescent material from the peripheral edges of the air port without blocking air flow through the port. Prior to move- ment of the cleaning head or concurrently with the initial movement thereof, the damper is moved to a retracted position inside the plenum so as not to interfere with the moving cleaning head. The plenum is attached to a mounting plate affixed to the outer wall of the wind box. The mounting plate pivotally carries an actuating cylinder exteriorly of the plenum, which cylinder is coupled to the cleaning head by an actuating rod and to the damper by a translation mechanism which moves the damper. The actuating cylinder moves the actuating rod in a reciprocating cycle, first toward and then away from the cleaning head, causing the damper to retract out of the path of the cleaning head, and the cleaning head to swing into the air port and clean char buildup along the edges thereof, and subsequently to withdraw from the air port. As the cleaning head moves out of the air port and retracts to its at-rest position, the damper is returned to the same position it occupied prior to the beginning of the cleaning cycle. The rod and cylinder pivot freely by means of a mounting assembly attached to the mounting plate, as the damper retracts and the cleaning head swings into and out of the air port. The cleaning head incor- porates a hook-like configuration which extends inside the furnace above the upper edge of the air port where buildup of excrescent char is excessive. In an alternative embodiment of the invention, the cleaning head and damper are each provided with a separate actuating cylinder and rod, which are operated in synchronism to retract the damper out of the path of the cleaning head as a cleaning cycle begins, and to return the damper to its previous position as the cleaning head is retracted from the air port to its at-rest position.
600712
Clyde Blowers Inc.
Goodspeed Byron L.
Oyen Wiggs Green & Mutala Llp
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