To make it possible to perform extremely low NOx emission by improving a premixing burner, to densely mix combustion air and fuel in an extremely short section by incorporating a simple geometrical shape and effective motion behavior in a burner, to perform the uniform speed distribution in a mixing area, and to effectively prevent the back fire of a flame without using a mechanical flame stabilizer.
To burn gaseous and/or liquid-like fuel, the premixing burner comprises a vortex generator 9 for generating vortex for allowing residual vortex to retain in fuel/air mixed flow after the air and fuel are completely mixed, an annular main fluid passage 20 formed of a passage wall with a constant height and having a length of a range of 5 to 20 times as large as the height at the downstream side of the generator 9 and fuel injection means and enlarged by the closure of the inner cylinder wall 21a to form a circular main fluid passage.
ADONAN EROGURU
PIITAA SHINIA
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