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Title:
METHOD FOR COMPRESSION OF AQUEOUS SLURRY CONTAINING SOLID FOREIGN MATTER AND PAPER DUST, AND TREATMENT METHOD OF WASTE GYPSUM BOARD
Document Type and Number:
WIPO Patent Application WO/2022/014115
Kind Code:
A1
Abstract:
By compressing an aqueous slurry containing solid foreign matter and paper dust by means of a screw press having a mesh with 1.5-3 mm openings, the aqueous slurry is separated into a liquid component that has passed through the mesh, and the paper dust and solid foreign matter. Subsequently, the paper dust and solid foreign matter are separated by sifting the liquid component by means of a sieve that has 1 mm or smaller openings.

Inventors:
HIRANAKA SHINGO (JP)
MATSUO KENTAROU (JP)
Application Number:
PCT/JP2021/015913
Publication Date:
January 20, 2022
Filing Date:
April 19, 2021
Export Citation:
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Assignee:
TOKUYAMA CORP (JP)
International Classes:
B01D36/02; B01D29/17; B01D29/25; B01D29/37; B03B5/00; B07B1/00; B09B5/00
Foreign References:
JP2020065975A2020-04-30
JPH05317900A1993-12-03
JP2012024690A2012-02-09
JP2020065975A2020-04-30
Attorney, Agent or Firm:
SHIOIRI Akira et al. (JP)
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