초록 ▼

To provide a combustion apparatus and a controlling method therefor which are capable of preventing the flame-out and backfire of the flame of a premix burner and the increase of the NOx concentration attributable to the change of the calorific value of the fuel, the amount of air supplied to the pr

To provide a combustion apparatus and a controlling method therefor which are capable of preventing the flame-out and backfire of the flame of a premix burner and the increase of the NOx concentration attributable to the change of the calorific value of the fuel, the amount of air supplied to the premix burner is so controlled as to achieve a low NOx within the range in which the premix burner effects a stable combustion in accordance with the calorie of the fuel supplied to the combustion apparatus, and a change of the output of the combustion apparatus attributable to this control of the amount of air is compensated by the control of the amount of the fuel supplied to the diffusion burner.

대표청구항 ▼

A method for controlling, in a steady-state operating condition, a combustion apparatus which has a premix burner and a diffusion burner, both burners being supplied with fuel from a common fuel supply, the method comprising the steps of: measuring a calorific value of fuel supplied to said combusti

A method for controlling, in a steady-state operating condition, a combustion apparatus which has a premix burner and a diffusion burner, both burners being supplied with fuel from a common fuel supply, the method comprising the steps of: measuring a calorific value of fuel supplied to said combustion apparatus; increasing, when the measured calorific value is greater than a reference value, an amount of air supplied to the premix burner so as to achieve a low NOx within a range of stable combustion thereof; and decreasing an amount of fuel supplied to the diffusion burner to supplement a change of total power of said combustion apparatus attributable to an increase in the calorific value of the fuel. A combustion apparatus including a premix burner and a diffusion burner with the premix burner and diffusion burner being supplied with fuel from a common fuel supply, said apparatus comprising: a calorific value measuring device for measuring a calorific value of fuel to be supplied to the combustion apparatus; a control device for controlling one of an increase or decrease of an amount of air supplied to the premix burner in accordance with one of an upward or downward change of a detection value of the calorific value of the measuring device so as to allow the premix burner to effect a low NOx combustion within a range of stable combustion; and another control device for controlling one of a decrease or increase in an amount of fuel supplied to the diffusion burner so as to supplement a change of the power or the combustion apparatus attributable to the upward or downward change of said calorific value of the fuel.