Method and device for heating object to be heated

A device configured to heat an object to be heated, the device comprising:

• a burner configured to combust a fuel fluid and a combustion supporting gas to heat the object to be heated, the burner comprising:
• a center supply pipe disposed along a central axis of the burner and configured to supply the fuel fluid and a primary oxygen gas, the center supply pipe comprising:
• a primary fuel supply pipe which is disposed on the central axis of the burner:
• a secondary fuel supply pipe which is disposed to surround the primary fuel supply pipe;
• and
• a primary oxygen gas supply pipe which is disposed to surround the secondary fuel supply pipe;
• and
• at least one combustion supporting gas supply pipe which is concentrically arranged around the center supply pipe and is configured to supply combustion supporting gas;
• a flow rate control unit configured to control a flow rate of the fuel fluid, a flow rate of the combustion supporting gas, and a flow rate of oxygen gas supplied to the burner;
• a temperature measuring unit installed in the object to be heated;
• and
• a calculation unit configured to perform arithmetic processing based on a temperature measured by the temperature measuring unit to generate combustion information and transmit the combustion information to the flow rate control unit,
• wherein the flow rate control unit is configured to:
• selectively increase or decrease a flow rate of the fuel fluid and the combustion supporting gas based on the combustion information input from the calculation unit, to increase a temperature of the object to be heated, and
• maintain or increase a heat transfer efficiency between the flame and the object to be heated as the temperature of the object to be heated increases by selectively increasing or decreasing the flow rate of the fuel fluid and the combustion supporting gas to increase an oxygen concentration in the combustion supporting gas supplied to the burner based on the temperature measured by the temperature measuring unit so that the oxygen concentration in the combustion supporting gas increases with an increase in the temperature of the object to be heated.