Centrifugal pellet dryer for small applications
AssigneeGala Industries, Inc.
InventorsDavid E. Bryan, Carl M. Dudding
Life of this patent
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Abstract
A dryer for removing surface moisture from a pelletized product and more specifically a dryer which is constructed with dimensions enabling it to effectively centrifugally remove surface moisture from pellets of resin material received from an underwater pelletizer. The dryer is capable of operating at very low rates and easily cleaned with its overall size enabling it to be effectively used for small operations, especially laboratory applications.
Claims47
A dryer for removing surface moisture from pelletized product in the form of a slurry of pellets and water comprising a housing, a slurry inlet at a lower end portion of said housing, a dried pellet outlet at an upper end portion of said housing, a cylindrical screen mounted within said housing, said screen including a peripheral perforated wall in spaced relation to the housing, a rotor positioned within said screen, axially inclined radial lifting blades on said rotor moving in a path concentric with and adjacent said screen, and a motor drivingly connected to said rotor, said slurry inlet communicating with the interior of said screen, said dried pellet outlet communicating with the interior of said screen, said housing including separable upper and lower sections, said motor being mounted on said upper end of said housing section driving said rotor through a bearing structure in said upper section with a lower end of said rotor guidingly received in an alignment assembly in said lower section thereby eliminating a sealed bearing structure for the lower end of said rotor.
A dryer for removing surface moisture from pelletized plastic product comprising a housing, a water and pellet slurry inlet at a lower end portion of said housing, a dried pellet outlet at an upper end portion of said housing, a screen mounted within said housing, said screen including a peripheral perforated wall in spaced relation to the housing, a rotor positioned within said screen for lifting said pellets upwardly within said screen, a motor drivingly connected to said rotor, said slurry inlet communicating with the interior of said screen, said pellet outlet communicating with the interior of said screen, said housing including a separable base section having a water discharge, said base section supporting an upper section, of said housing and a lift device connected with said housing above said base section for elevating said housing upper section above said base section when the upper section is separated from said base section.
A centrifugal pellet dryer comprising a housing, a screen and an elevation rotor oriented in concentric relation with the rotor being driven from an upper end and the screen including a pellet slurry inlet at a lower portion and a dried pellet outlet at an upper portion, said housing supported from a top wall of a tank and in communication with the tank for discharge of water from said screen and housing directly into the tank, said tank including a screen bottomed drawer receiving water from said housing to separate solid particles entrained in said water, said drawer being slidable mounted in a top area of said tank to enable removal of solid particles from the drawer.
A dryer for removing surface moisture from pelletized product in the form of a slurry of pellets and water comprising a housing including separable upper and lower sections, a screen mounted within said housing, an elevating rotor positioned within said screen, a motor drivingly connected to said rotor, a slurry inlet communicating with a lower interior portion of said screen, a dried pellet outlet communicating with an upper interior portion of said screen, said motor being mounted on said upper section of said housing and driving said rotor through a bearing structure in said upper section of the housing with a lower end of said rotor guidingly received in an alignment assembly in said lower section of the housing.
A dryer for removing surface moisture from plastic pellets produced in an underwater pelletizer which comprises a housing, a screen mounted within said housing, an elevating rotor positioned within said screen, a motor drivingly connected to said rotor, a water and pellet slurry inlet communicating with the interior of said screen adjacent a lower end thereof, a dried pellet outlet communicating with the interior of said screen adjacent an upper end thereof, said housing including a separable base section having a water discharge and an upper section supported on said base section, and a lift device for elevating said upper section of said housing above said base section when the upper section is separated from said base section.
A dryer for removing surface moisture from pelletized product comprising a housing having an upper section and a base section, a screen mounted within said housing, an elevating rotor positioned within said screen, a motor drivingly connected to said rotor, a water and pellet slurry inlet communicating with the interior of said screen, a dried pellet outlet communicating with the interior of said screen, said base section of the housing being separable from the upper section and having a water discharge, and a lift device to lift said upper section of the housing, rotor and screen generally vertically away from and out of said base section, said lift device also being rotatable to rotate said upper section of the housing, rotor and screen away from vertical alignment with said base section.
A dryer for removing surface moisture from plastic pellets produced in an underwater pelletizer which comprises a housing having a top plate section, an upper cylindrical section and a base section, a tubular screen mounted within said housing, an elevating rotor positioned within said screen and supported from said top section, a motor mounted on said top plate section and drivingly connected to said rotor, a water and pellet slurry inlet and a dried pellet outlet each communicating with the interior of said screen, said base section of the housing being separable from the upper section and having a water discharge, said housing upper section being separable from said housing top plate section, and a lift device to lift said top plate section and upper section of the housing, said rotor and said screen generally vertically away from and out of said base section, said rotor being exposed upon removal of said upper section and said screen.
Dependencies are inferred from the claim text.