METHOD AND DEVICE FOR DRYING AND CRYSTALLIZING GRANULATE

摘要

A method and device for continuously drying and crystallizing water-flushed granulate. The method comprises the steps of: feeding water-flushed granulate into a pre-dryer, pre-drying granulate in the pre-dryer, conveying pre-dried granulate into a dryer/crystallizer, and discharging crystallized granulate from the dryer/crystallizer. An air conditioning means produces temperature-controlled and humidity-conditioned air that is delivered to the dryer/crystallizer, wherein the exhaust air of the dryer/crystallizer is delivered to the pre-dryer, and wherein the exhaust air of the pre-dryer is returned to the air conditioning means forming a closed air circuit is formed by the dryer/crystallizer, pre-dryer, and air conditioning means. The device comprises a pre-dryer, a dryer/crystallizer, an air conditioning means, and optionally a control unit.

主权项

1. A method for continuously drying and crystallizing water-flushed granulate, comprising:
a. feeding water-flushed granulate into a pre-dryer; b. pre-drying the granulate in the pre-dryer; c. conveying pre-dried granulate into a dryer/crystallizer; d. discharging crystallized granulate from the dryer/crystallizer; e. producing with an air conditioning means, temperature-controlled and humidity-conditioned air that is delivered to the dryer/crystallizer; f. delivering exhaust air of the dryer/crystallizer to the pre-dryer; and g. returning exhaust air of the pre-dryer to the air conditioning means, thereby forming a closed air circuit.