DISCHARGE TYPE ELECTROSTATIC SORTER

Japanese Patent JP3226446

B

PROBLEM TO BE SOLVED: To make it possible to improve the recovery rate and purity of plastics by specifying the voltage to be impressed on a high-voltage electrode at the time of sorting plastics which are insulating pulverized refuse.
SOLUTION: The pulverized refuse 13 which is to be sorted, is fed from a vibration feeding plate 14 and is sprayed onto a metallic drum electrode 12 receives polarization and electron radiation in the discharge formed between a high-voltage electrode 11 and the metallic drum electrode 12. Namely, unipolar ions are released from the high-voltage electrode 11 and fall onto the pulverized refuse 13 to be sorted on the metallic drum electrode 12. The refuse 13 is electrified to the same pole as the pole of the ions. The conductive pulverized refuse 13A is separated and jumped from the grounded metallic drum electrode 12 and falls onto a forward first separating container 16. The insulating pulverized refuse 13B is strongly attracted by the grounded metallic electrode 12, is dropped in a backward position and is separated into a second separating container 17. The impressed voltage is, thereupon, obtd. from the equation defining the voltage impressed on the high-voltage electrode as VP and the distance between the high-voltage electrode and the metallic drum electrode as L.

Arai, Hiroshige
Maehata, Hidehiko
Kato, Takeshi
Tojo, Chiaki

JP1995000254774

August 31, 2001

October 02, 1995

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HITACHI ZOSEN CORP

B03C7/02; B03C7/06; B03C7/00; (IPC1-7): B03C7/06; B03C7/02

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