Heating – With cleaning means for apparatus
Patent
1988-11-09
1989-10-10
Yuen, Henry C.
Heating
With cleaning means for apparatus
432 2, 151041C, F27D 2300
Patent
active
048728349
ABSTRACT:
A recovery boiler port cleaner for a chemical recovery furnace, such as a sulfur-reducing recovery boiler, used in pulp and paper processing. The port cleaner is mounted on an exterior wall of the boiler and is comprised of a stainless steel port cleaning blade attached to a push rod which is slidable in a protective stainless steel sleeve extending into the boiler to a point adjacent a respective air port. A pneumatic cylinder for actuating the push rod is located on a stand-off support structure attached to a flat plate included on a mounting bracket welded to the boiler wall. The support structure acts to protect the air cylinder from the heat of the boiler and reduces the failure rate thereof. Also, a cover is provided on the outside of the stand-off support structure to protect personnel from movement of the push rod when activated. A solenoid valve for energizing the air cylinder is located remotely from the boiler and the mechanical assembly attached to the boiler wall.
REFERENCES:
patent: 3918375 (1975-11-01), Hayakawa et al.
patent: 3990836 (1976-11-01), Bricmont
patent: 3990949 (1976-11-01), Ovsyannikov
patent: 4102001 (1978-07-01), Baba et al.
patent: 4790750 (1988-12-01), Bourel
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