EP 4054985 A4 20231108 - DRYING METHOD AND DEVICE FOR SLUDGE
Title (en)
DRYING METHOD AND DEVICE FOR SLUDGE
Title (de)
TROCKNUNGSVERFAHREN UND -VORRICHTUNG FÜR SCHLAMM
Title (fr)
PROCÉDÉ ET DISPOSITIF DE DÉSHYDRATATION DE BOUES
Publication
Application
Priority
- FI 20195958 A 20191108
- FI 2020050736 W 20201106
Abstract (en)
[origin: WO2021089924A1] The application relates to a sludge drying method (100) according to one embodiment. The method comprises treating (116) sludge chemically in a chemical conditioning tank (248) for producing sludge floes in the sludge, separating (120), in an electric dryer by means of an electric field, water present in the sludge from its solid material, and compressing (120), in the electric dryer, water mechanically out of the sludge. The method further comprises pretreating (112) the to-be-dried sludge with ultrasound for at least weakening the cell structure of the sludge, thereby enabling the internal water stored in sludge cells to be removed in the electric dryer.
IPC 8 full level
C02F 11/15 (2019.01); B01D 61/56 (2006.01); C02F 9/00 (2023.01); C02F 11/121 (2019.01); C02F 11/131 (2019.01); C02F 11/143 (2019.01); C02F 11/147 (2019.01); F26B 1/00 (2006.01); F26B 3/347 (2006.01); F26B 5/02 (2006.01); F26B 5/14 (2006.01); G01N 21/3563 (2014.01); C02F 11/123 (2019.01)
CPC (source: EP FI)
B01D 61/56 (2013.01 - FI); C02F 9/00 (2013.01 - EP); C02F 11/006 (2013.01 - FI); C02F 11/121 (2013.01 - FI); C02F 11/131 (2018.12 - FI); C02F 11/143 (2018.12 - FI); C02F 11/147 (2018.12 - FI); C02F 11/15 (2018.12 - FI); F26B 1/00 (2013.01 - EP FI); F26B 3/347 (2013.01 - EP FI); F26B 5/02 (2013.01 - EP FI); F26B 5/14 (2013.01 - EP FI); G01N 21/3563 (2013.01 - FI); C02F 11/121 (2013.01 - EP); C02F 11/123 (2013.01 - EP); C02F 11/131 (2018.12 - EP); C02F 11/143 (2018.12 - EP); C02F 11/147 (2018.12 - EP); C02F 11/15 (2018.12 - EP); F26B 2200/02 (2013.01 - EP); F26B 2200/18 (2013.01 - EP)
Citation (search report)
- [A] EP 3539932 A1 20190918 - KUBINGER ULRICH [AT]
- [A] US 2004084380 A1 20040506 - KICINSKI ANDREW J [US]
- [A] CN 108911472 A 20181130 - UNIV HOHAI
- [A] QIAN XU ET AL: "Characterization of the structure and interaction of sludge biosolids during the conditioning-electro-dewatering pro", COLLOIDS AND SURFACES A : PHYSIOCHEMICAL AND ENGINEERINGS ASPECTS, ELSEVIER, AMSTERDAM, NL, vol. 484, 31 July 2015 (2015-07-31), pages 108 - 117, XP029271965, ISSN: 0927-7757, DOI: 10.1016/J.COLSURFA.2015.07.056
- See references of WO 2021089924A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2021089924 A1 20210514; EP 4054985 A1 20220914; EP 4054985 A4 20231108; FI 20195958 A1 20210509
DOCDB simple family (application)
FI 2020050736 W 20201106; EP 20884881 A 20201106; FI 20195958 A 20191108