(19)

(11)

EP 2 997 307 A1

(12)

(43) Date of publication: 23.03.2016 Bulletin 2016/12 (21) Application number: 14728236.2 (22) Date of filing: 13.05.2014

(51) International Patent Classification (IPC):  F23C 10/00(2006.01) F23G 5/30(2006.01) (86) International application number: PCT/FI2014/050356 (87) International publication number: WO 2014/184437 (20.11.2014 Gazette 2014/47)

(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 (30) Priority: 14.05.2013 FI 20135507 (71) Applicant: Valmet Technologies Oy 02150 Espoo (FI)	(72) Inventor: ETELÄAHO, Risto FI-33101 Tampere (FI) (74) Representative: Kolster Oy Ab  Iso Roobertinkatu 23 PO Box 148 00121 Helsinki 00121 Helsinki (FI)