Primary air duct cleaning apparatus for recovery boilers
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United States of America Patent
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Sep 3, 1985
Grant Date -
N/A
app pub date -
Dec 3, 1984
filing date -
Dec 3, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A primary air duct for a chemical recovery furnace is rectangular in cross section. Smelt accumulates on the walls of the air duct at the furnace end. A scraper structure is comprised of a pair of C-channels hinged together at one end. A mechanism moves the hinged scraper forward so it can be guided into scraping contact with the duct walls. The edges of the C-channels are guided by pin and groove engagement between the channels and the duct walls. The scraper is reciprocated from an inoperative position to a scraping mode by a rod to which force is applied.
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