Primary air duct cleaning apparatus for recovery boilers

Details Primary air duct cleaning apparatus for recovery boilers Primary air duct cleaning apparatus for recovery boilers

1984-12-03

1985-09-03

Yuen, Henry C.

Liquid heaters and vaporizers

Cleaning

Blow off

122379, 122235B, 15246, 15249, 1510418, F22B 3748, F23J 300

Patent

active

045385521

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.

REFERENCES:
patent: 111036 (1871-01-01), Brase et al.
patent: 547451 (1895-10-01), Radspinner
patent: 745642 (1903-12-01), Miller
patent: 1162393 (1915-11-01), Petrich
patent: 1191236 (1916-07-01), Rigo
patent: 1251480 (1918-01-01), Cross
patent: 2806237 (1957-09-01), Love
patent: 3875904 (1975-04-01), Astrom
patent: 4333200 (1982-06-01), Thurow
patent: 4365381 (1982-12-01), Neuman

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