MANUFACTURING METHOD FOR CARBON DIOXIDE ABSORBED SLUDGE FINE POWDER AND CARBON DIOXIDE ABSORBED SLUDGE FINE POWDER, AND WATER-HARDENING HARDENED BODY

Title:

MANUFACTURING METHOD FOR CARBON DIOXIDE ABSORBED SLUDGE FINE POWDER AND CARBON DIOXIDE ABSORBED SLUDGE FINE POWDER, AND WATER-HARDENING HARDENED BODY

Document Type and Number:

WIPO Patent Application WO/2023/140126

Kind Code:

A1

Abstract:

[Problem] To provide a manufacturing method for a carbon dioxide absorbed sludge fine powder that has high fluidity and serves as a binder of low carbon materials. [Solution] In the present invention, water is added to residual concrete or return concrete to obtain a slurry; sand and gravel are separated and removed to obtain sludge water; a fine sand component is separated and removed from the sludge water by a wet cyclone to obtain concentrated sludge water; and the concentrated sludge water is dewatered to obtain a sludge cake. The sludge cake is placed in a rotating drum into which heated air and high-concentration carbon dioxide are supplied, and the sludge cake is pulverized and dried while being caused to absorb the carbon dioxide to obtain a carbon dioxide absorbed sludge fine powder. Alternatively, the sludge cake is placed in the rotating drum, heated air is supplied, and the sludge cake is pulverized and dried to obtain a sludge fine powder. This sludge fine powder is exposed to high-concentration carbon dioxide to obtain a carbon dioxide absorbed sludge fine powder.

Inventors:

OHKAWA KEN (JP)
AOKI SHINICHI (JP)
MOMOSE HARUKI (JP)
TOMOE SHIRO (JP)
KANDA TETSUSHI (JP)
YODA KAZUHISA (JP)
KASAI HIROSHI (JP)
SAKATA NOBORU (JP)

Application Number:

PCT/JP2023/000207

Publication Date:

July 27, 2023

Filing Date:

January 06, 2023

Export Citation:

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Assignee:

SANWASEKISAN CORP (JP)
KAJIMA CORP (JP)

International Classes:

B09B5/00; B01D53/62; B01J20/04; C02F11/12; C04B7/24

Foreign References:

JP2011067764A	2011-04-07
JP2021138574A	2021-09-16
JPH078796A	1995-01-13

Other References:

HARUKI MOMOSE ET AL.: "Development of ready-mixed concrete using fine dried sludge powder as an admixture", KASHIMA INSTITUTE OF TECHNOLOGY ANNUAL REPORT, KAJIMA COOPERATION, TOKYO, no. 66, 1 December 2018 (2018-12-01), Tokyo, pages 75 - 84, XP009547764, ISSN: 0918-015X