Process for the continuous drying of water-surrounded granulate

Details Process for the continuous drying of water-surrounded granulate Process for the continuous drying of water-surrounded granulate

2005-09-29

2008-08-19

Lu, Jiping (Department: 3749)

Drying and gas or vapor contact with solids

Process

Gas or vapor contact with treated material

C034S487000, C034S493000, C034S500000

Reexamination Certificate

active

07412782

ABSTRACT:
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 In a first conveying region in the form of a chute, water is withdrawn under gravity from the plastic granulate at a temperature of 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.

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