EP 3913283 A4 20220309 - BOILER
Title (en)
BOILER
Title (de)
KESSEL
Title (fr)
CHAUDIÈRE
Publication
Application
Priority
- JP 2019030836 A 20190222
- JP 2020000220 W 20200108
Abstract (en)
[origin: EP3913283A1] Provided is a boiler that can cool a secondary burner even if the small capacity secondary burner is not in operation when a large capacity primary burner is in operation. The boiler includes: a combustion vessel (11) forming a combustion chamber (24); a primary burner provided to the combustion vessel (11); a secondary burner (13) provided to the combustion vessel (11), provided downstream of flame formed by the primary burner, and having a smaller capacity than the primary burner; a secondary burner wind box (40) accommodating the secondary burner (13) and attached to the combustion vessel (11); a secondary burner air fan (44) configured to supply air to the secondary burner wind box (40); and a control unit configured to control the secondary burner air fan (44). When the primary burner is in operation and the secondary burner (13) is not in operation, the control unit controls the secondary burner air fan (44) such that the pressure of the secondary burner wind box (40) is higher than the pressure of the combustion vessel (11).
IPC 8 full level
F22B 31/00 (2006.01); F22B 13/06 (2006.01); F23D 14/78 (2006.01)
CPC (source: EP KR)
F22B 13/06 (2013.01 - EP); F22B 31/04 (2013.01 - EP KR); F22B 35/00 (2013.01 - EP); F23C 1/08 (2013.01 - EP); F23C 6/045 (2013.01 - EP); F23D 14/78 (2013.01 - KR); F22B 21/04 (2013.01 - EP); F22B 21/081 (2013.01 - EP); F23D 14/78 (2013.01 - EP)
Citation (search report)
No further relevant documents disclosed
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3913283 A1 20211124; EP 3913283 A4 20220309; EP 3913283 B1 20221228; CN 113439180 A 20210924; CN 113439180 B 20231201; DK 3913283 T3 20230116; JP 2020134069 A 20200831; JP 7292898 B2 20230619; KR 102551979 B1 20230705; KR 20210114501 A 20210923; WO 2020170622 A1 20200827
DOCDB simple family (application)
EP 20760113 A 20200108; CN 202080015151 A 20200108; DK 20760113 T 20200108; JP 2019030836 A 20190222; JP 2020000220 W 20200108; KR 20217026029 A 20200108