Process for the continuous drying of water-surrounded granulate
AssigneeRieter Automatik GmbH
InventorStefan Dahlheimer
Life of this patent
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Abstract
The invention relates to a process for the continuous drying of water-surrounded granulate transported by a screen-type belt conveyor. In a first conveying region in the form of a chute, water is withdrawn under gravity from the plastic granulate at a temperature of >than 100° C., wherein, in a following second region on a belt conveyor, any remaining water is substantially removed by air extraction through the belt conveyor, the air extraction taking place at an air speed of >than 20 m per second and with a dwell time in the second region of <than 2 seconds, there being a following third region, as an evaporation zone, with a dwell time of more than two seconds.
Claims20
Process for the continuous drying of water-surrounded granulate transported by a screen-type belt conveyor (4, 10), characterized in that, in a first conveying region in the form of a chute, water is withdrawn under gravity from a plastic granulate at a temperature of >than 100° C., wherein, in a following second region on a belt conveyor (4), any remaining water is substantially removed by air extraction (8) through the belt conveyor (4), the air extraction taking place at an air speed of >than 20 m per second and with a dwell time in the second region of <than 2 seconds, there being a following third region (6, 9), as an evaporation zone, with a dwell time of more than 2 seconds.
Dependencies are inferred from the claim text.