Power utilisation in appts. for regenerating plastics waste - which is improved by keeping drive motor current constant at maximum rated value

• Main Author: BECK,ERICH
• Format: Patent
• Language: English; German
• Published: 14.04.1977
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING GRANULES OR PREFORMS; MILLING GRAIN; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; PREPARATORY TREATMENT OF GRAIN FOR MILLING; 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

Appts. of parent patent is for regenerating dirty plastic waste, esp. plastic film, by washing, disintegrating, agglomerating and granulating the waste in a single vessel. At the bottom of vessel there is at least one beater tool driven by an electrical machine is rotatably mounted. In the addition, the electrical power of the drive machine can be regulated during the whole regenerating process, at a more or less constant value by changing the machine speed and/or the flow resistance between the beater tool and the material filling the vessel, as a function of the load current of the machine. The electrical power of the drive machines is pref. adjustable to the nominal power rating. By better utilisation of the motor power during the regeneration, a smaller and cheaper motor can be used for the same with load than in the normal case where the motor current is not regulated.