Smelt spout enclosure for chemical recovery boilers

Cleaning and liquid contact with solids – Apparatus – Having self cleaning means

Reexamination Certificate

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Details

C162S030100, C162S030110

Reexamination Certificate

active

07806127

ABSTRACT:
An enclosure for a smelt spout of a chemical recovery boiler comprises a skirt having a central region through which smelt flowing from the smelt spout falls into a dissolving tank. The central region is defined by a wall and has a trough disposed around its perimeter. The trough is supplied with a fluid that overflows the trough and flows downward across the wall toward the dissolving tank to clean and cool the skirt. The trough may have a depth substantially equal to the height of the skirt, and the fluid may include at least one of: water, weak wash, and green liquor. Water may be periodically supplied to the trough in lieu of the fluid to clean the trough. A nozzle system is configures to direct at least one shatter jet onto the smelt flowing from the smelt spout to break it up into smaller particles.

REFERENCES:
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patent: 1681512 (2006-07-01), None
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patent: WO 03/093747 (2003-11-01), None
PCT International Search Report and The Written Opinion of the International Searching Authority dated Apr. 6, 2008—(PCT/US2007/077816).

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