Horizontal kiln for drying recovered particulate plastics - of simple design to permit economic recovery

• Format: Patent
• Language: English; French
• Published: 06.08.1976
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Recovery of powdered or granular plastics materials contaminated by damp or other materials by passing the material into a slightly inclined horizontal rotary kiln which is purged by air heated to 130-160 degrees C and passed countercurrent through a coaxial tube perforated to release the hot air uniformly along the length of the kiln. The dried materials are subsequently passed through an automatic sieve. The equipment is of simple construction and allows material to be recovered at an economic cost: the design avoids the need for close temp control and associated sophisticated equipment.