(19)
(11) EP 2 325 561 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.09.2012 Bulletin 2012/39

(43) Date of publication A2:
25.05.2011 Bulletin 2011/21

(21) Application number: 10251981.6

(22) Date of filing: 22.11.2010
(51) International Patent Classification (IPC): 
F23N 5/00(2006.01)
 F23G 7/08(2006.01)
(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: 23.11.2009 GB 0920457

(71) Applicant: Hamworthy Combustion Engineering Limited
Poole, Dorset BH17 0LA (GB)

(72) Inventors:
  • Cioria, Giuseppe Eriberto
    20040 Burago H. (MB) (IT)
  • Salani, Cesar Augusto
    Campinas City Sao Paulo State (BR)
  • Webley, Nigel Peter
    Ferndown BH22 8DS (GB)

(74) Representative: Harkness, Katherine Joy et al
Atkinson Wheller Ltd St Brandon's House 27-29 Great George Street
Bristol BS1 5QT
Bristol BS1 5QT (GB)

   


(54) Monitoring flare stack pilot burners


(57) A flare stack comprises an upwardly extending gas discharge duct 10 and a pilot burner 16 operative at an burner location near the open top end of the duct 10 to ignite gas discharged by way of the duct. Atmospheric samples from the burner location are delivered to a monitoring station 20 remote from the duct 10 and at ground level 12. A sensor at the monitoring station 20 is responsive to a parameter of the sample indicative of combustion at the burner location such as increased CO2 or NOx or decreased O2. An igniter is operatively associated with the sensor and arranged to light the pilot burner 16 automatically if the sensor does not detect said parameter in the sample.







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