Richard W. Jocsak - Easton PA
Fuller Company - Bethlehem PA
A method and apparatus for conditioning fly ash discharged from a silo to prevent the material from excessively dusting during discharge and transit to a storage or dump site. Apparatus includes a level box flow connected to the outlet of the silo with a modulating valve positioned between the outlet of the silo and the inlet of the level box for controlling the flow rate of material into the level box. The level box is a gas permeable bottom with air under pressure being passed upwardly through the material therein to aerate the material and improve flow characteristics of the material into an ash conditioner which is flow connected to the outlet of the level box. The ash conditioner is a conventional type including a rotating drum with an internal spray system for spraying water onto the ash to wet the ash. Wetted fly ash is relatively dust free when discharged from the conditioner. A bubble tube level sensor in the ash conditioner is used to control the valve controlling feed rate of material from the silo into the level box to maintain a substantially constant level of material in the level box and thus to the ash conditioner.