METHOD AND DEVICE FOR DRYING AND CRYSTALLIZING OF POLYMERIC GRANULATE

• Main Author: Deiß, Stefan
• Format: Patent
• Language: English; French; German
• Published: 22.08.2018
• Subjects: BLASTING; DRYING; DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM; HEATING; LIGHTING; MAKING GRANULES OR PREFORMS; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TRANSPORTING; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

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.