| 摘要 |
PURPOSE:To make it possible to improve heating performance in the initial stage of temperature rising and conduct temperature regulation in a furnace exactly and easily by maintaining in the initial stage of temprature rising the amount of fuel supply to a burner at substantially a constant amount suitable for a set temperature and thereafter increasing the fuel supply gradually and also gradually decreasing the amount of gas supply which contains oxygen for burner combustion. CONSTITUTION:In the initial stage (t0-t1) of temperature rising the amount of fuel supply is maintained at a first set amount (Q1) suitable for the condition in which the temperature in a furnace becomes a second set temperature (T2). The amount of gas supply which contains oxygen for combustion is decreased from a first set amount (Q2) to a third set amount (Q3) and a high temperature gas, with its temperature being raised as the temperature in the furnace rises, is generated as much as possible to suppress increase in heat loss by a high temperature in the exhaust gas for the temperature in the furnace, and an object to be heated is convection-heated with ample strirring of the inside of the furnace with high temperature combustion gas. As a result of this, in the time from starting combustion to the temperature rising in the furnace to a first set temperature it is always possible to reduce waste of the fuel and increase total heat efficiency satsifactorily. |
