The screener, a 30 in. (762 mm) diameter VIBROSCREEN® model K30-2-SS, together with a 40 in. (1016 mm) diameter Kason model K40/48-1FBD-SS dryer, removes up to 50 gallons (1891 liters) of water per minute, and dries up to 700 lbs (318 kg) of on-size particles per hour.
The screener is equipped with an imbalanced-weight gyratory motor that vibrates the screening chamber, which is suspended on springs. Oversize particles travel in controlled spiral pathways from the center of the upper screen to a spout at the screen's periphery where they are discharged for reprocessing. On-size dewatered pellets falling onto the lower screen travel in controlled spiral pathways to an extended spout at the screen's periphery that leads to the fluid bed dryer. Undersize fines and water pass through the lower screen onto an integral metal chute and through a third spout for reprocessing.
The circular fluid bed dryer is typically half the size and weight of a rectangular fluid bed dryer of equivalent capacity and allows consolidation of all primary system components. Inherent strength of the circular processor eliminates the need for heavy-gauge walls and cross braces otherwise required to withstand continuous vibration, allowing vibratory motors to be downsized.
The circular unit also requires only one air inlet and outlet and has fewer weld seams, reducing overall size and construction cost, especially when finished to 3-A, FDA, and BISSC sanitary standards. Cleaning time is cut by more than 50 percent due to the reduction in interior seams and accessibility afforded by a quick-disconnect housing.
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