Waste plastic density separation

• Main Authors: NELSON JAMES STEWART, COLLINS KYLE LYNN, DEBRUYNE BRUCE ROGER
• Format: Patent
• Language: Chinese; English
• Published: 13.09.2022
• Subjects: DISPOSAL OF SOLID WASTE; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECLAMATION OF CONTAMINED SOIL SOIL; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Methods and systems for separating mixed plastic waste are provided herein. The methods generally include separating the mixed plastic waste into a PET-enriched stream and one or more PET-depleted streams. The separation may be done using a combination of two or more density separation stages. An exemplary density separation stage includes a float-sink separator and a centrifugal separator. The PET-enriched stream and the PET-depleted stream may be recovered and/or directed to a downstream chemical recovery process. 本文提供了用于分离混合塑料废物的方法和系统。该方法通常包括将混合塑料废物分离成PET富集流和一种或多种PET贫化流。该分离可以使用两个或更多个密度分离阶段的组合来完成。示例性的密度分离阶段包括浮沉分离器和离心力分离器。可以回收PET富集流和PET贫化流和/或将其引导至下游化学回收过程。