Title:
プラスチック片の回収方法および回収システム
Document Type and Number:
Japanese Patent JP7072780
Kind Code:
B2
Abstract:
To provide a recovery method and recovery system for plastic pieces, which can efficiently recover the plastic pieces from soil even if the plastic piece has a density higher than that of water.SOLUTION: Muddy water S obtained by loosening soil containing plastic pieces P is classified, by using a cyclone type centrifuge 2, into coarse-grained sediment Sa significantly containing coarse-grained earth and sand with relatively large particle sizes, which is discharged from an underflow outlet 2b of the centrifuge 2, and fine-grained sediment Sb significantly containing the plastic pieces P and fine-grained earth and sand with relatively small particle sizes, which is discharged from an overflow outlet 2c of the centrifuge 2. Then, the fine-grained sediment Sb is filtered through a filter 9, and the plastic pieces P are separated and recovered from the fine-grained sediment Sb.SELECTED DRAWING: Figure 1
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Inventors:
Tomohiro Morisawa
Kazunori Tamagami
Takae Asai
Inoue Tetsukyo
Kazunori Tamagami
Takae Asai
Inoue Tetsukyo
Application Number:
JP2020081534A
Publication Date:
May 23, 2022
Filing Date:
May 01, 2020
Export Citation:
Assignee:
Toa Construction Industry Co., Ltd.
National Maritime Research Institute, National Maritime Research Institute
National Maritime Research Institute, National Maritime Research Institute
International Classes:
B29B17/00; B03B5/00; B03B5/28; B03B9/06; B09C1/02
Domestic Patent References:
| JP11574A | ||||
| JP20183421A | ||||
| JP50142681A | ||||
| JP5184874A | ||||
| JP2009202089A |
Foreign References:
| WO2008004600A1 |
Attorney, Agent or Firm:
Seiryu International Patent Service Corporation
Daytime Takayoshi
Sakazawa Masao
Daytime Takayoshi
Sakazawa Masao
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