(19)

(11)

EP 2 550 082 A1

(12)

(43) Date of publication: 30.01.2013 Bulletin 2013/05 (21) Application number: 11758877.2 (22) Date of filing: 22.03.2011

(51) International Patent Classification (IPC):  B01D 29/13(2006.01) B01D 46/00(2006.01) B01D 29/11(2006.01) (86) International application number: PCT/FI2011/050240 (87) International publication number: WO 2011/117467 (29.09.2011 Gazette 2011/39)

(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 (30) Priority: 22.03.2010 FI 20105282 (71) Applicant: Metso Power OY 33101 Tampere (FI)	(72) Inventors: AIRIKKALA, Heikki FI-33580 Tampere (FI) VALTONEN, Hanne-Mari FI-96900 Saarenkylä (FI) (74) Representative: Rahkonen, Erkki Juhani et al Tampereen Patenttitoimisto Oy Hermiankatu 1 B 33720 Tampere 33720 Tampere (FI)