| 摘要 |
<p>PURPOSE:To contrive low-NOx combustion which is based on far effective use of a burner, by a method wherein operating terms of each burner step are made to differ from each other, the low-NOx combustion is performed respectively in each of the burners and operation of the burners at the low-NOx combustion is performed as a whole also. CONSTITUTION:Low-Nox combustion such as two step combustion is made to perform further by making use of a burner constituted as a whole like this along with contrivance of a reduction of NOx at a unit body of the burner by forming a high-temperature reduction flame in a burner part. In other words, supply quantities of secondary air 20 and tertiary air 30 can correspond with a matter that an operating speed of each of fans 302, 303 is made to vary other than application of dampers 321, 331. In this instance, especially, as for adjustment of an injection speed of the tertiary air 30 (mixed gas), it can be done freely by mixing exhaust gas 50 with the tertiary air 30 by making use of a damper 312 and keeping a supply quantity of oxygen in the mixed gas at a predetermined value.</p> |
