SPRAY NOZZLE, BURNER EQUIPPED WITH SPRAY NOZZLE, AND COMBUSTION DEVICE EQUIPPED WITH BURNER HAVING SPRAY NOZZLE

摘要

A spray nozzle is equipped with a spray fluid flow path and a spray medium flow path, and is provided with first branch flow paths branching from the spray fluid flow path and second branch flow paths branching from the spray medium flow path. The first branch flow paths and the second branch flow paths are connected so as to cause mixed fluids (formed by mixing the spray fluid and the spray medium) to flow downstream. Multiple pairs of opposing-flow paths are provided, which cause the mixed fluids to oppose one another near the tip of the spray nozzle and to flow downstream and collide with one another, with these opposing-flow paths being connected to multiple outlet holes, thereby spraying the mixed fluids to the outside from the outlet holes. A gas-liquid separation mechanism that separates the gas and liquid in the spray fluid and the spray medium is formed in the interior of the spray medium flow path, and branch parts that separate the flow path into multiple paths are provided downstream from the gas-liquid separation mechanism, with each of these branch parts being connected to a different outlet hole. Liquid fuel at the liquid outlet holes is sprayed with a high spray pressure and an appropriate gas-liquid ratio, and after spraying the liquid fuel easily mixes with combustion gas flowing at a separate location, so it is possible to suppress the generation of soot and CO, which are easily produced when the fuel concentration is high.