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(11)

EP 3 980 380 A1

(12)

(43) Date of publication: 13.04.2022 Bulletin 2022/15 (21) Application number: 19730393.6 (22) Date of filing: 04.06.2019

(51) International Patent Classification (IPC):  C02F 1/00(2006.01) G01C 21/20(2006.01) C02F 1/44(2006.01) B63J 4/00(2006.01) C02F 1/04(2006.01) C02F 103/00(2006.01) (52) Cooperative Patent Classification (CPC): C02F 1/008; C02F 2209/006; C02F 2103/008; B63J 4/00; G01C 21/20; C02F 1/441; C02F 1/04; Y02T 70/00 (86) International application number: PCT/FI2019/050427 (87) International publication number: WO 2020/245491 (10.12.2020 Gazette 2020/50)

(84) Designated Contracting States: 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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Wärtsilä Finland Oy 65100 Vaasa (FI)	(72) Inventors: TCHETCHINE, Konstantin 65380 Vaasa (FI) ANTILA, Jaakko 65380 Vaasa (FI) (74) Representative: Boco IP Oy Ab  C/o Innovation Home Tekniikantie 2 02150 Espoo 02150 Espoo (FI)