| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion device capable of maintaining reliability of an Osensor high, and also capable of reducing a load of maintenance.SOLUTION: A steam boiler includes: a combustion chamber 2a in which a fuel burns; a blower 3 for supplying air to the combustion chamber 2a; a duct 4 for guiding an exhaust gas generated in the combustion chamber 2a to the outside; and an Osensor 5 for detecting oxygen concentration of the exhaust gas in the duct 4. In the steam boiler 1, when it is determined that the combustion of the fuel is stopped, it is determined whether or not the air for purge is supplied to the combustion chamber 2a from the blower 3. Then, when it is determined that the air for purge is supplied to the combustion chamber 2a from the blower 3, the Osensor 5 is calibrated. |
