Dry bottom ash handling system

F - Mech Eng,Light,Heat,Weapons – 23 – J

Patent

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Details

F23J 1/02 (2006.01) F23J 3/06 (2006.01)

Patent

CA 2206352

A dry bottom ash handling system contemplates a plurality of hoppers disposed beneath a solid fuel-fired steam boiler. Each hopper includes angled walls converging at a generally rectangular opening controlled by a grate door. Air inlets are provided at intersections between adjacent angled walls to (1) facilitate combustion of unburned fuel in the storage hopper, and (2) facilitate flow of ash through the hopper opening. Ash flowing through the hopper opening enters a crusher and is then conveyed via a vacuum line to a point of disposal including a mobile tank truck that receives heavier ash particles and allows bypassing of lighter particles to a silo.

Système de manutention à sec des cendres évacuées par le fond d'une chaudière desservie par une pluralité de trémies d'évacuation. Chaque trémie comporte des parois inclinées qui convergent vers une ouverture de forme rectangulaire commandée par une grille. Des orifices d'admission d'air sont aménagés aux intersections des parois inclinées en vue (1) de favoriser la combustion des combustibles imbrûlés dans la trémie de stockage et (2) de faciliter l'écoulement des cendres à travers les trémies. Les cendres qui pénètrent dans les trémies sont acheminées vers un broyeur avant d'être aspirées vers un point d'évacuation où les particules plus lourdes sont recueillies dans une citerne mobile tandis que les particules plus légères sont dirigées vers un silo.

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