High thermal-stress nozzle has inlet opening that is provided for supplying coolant at nozzle shaft, and outlet opening that is formed for removing coolant from nozzle shaft and nozzle orifice

摘要

The nozzle has an outer pipe (1) for a cooling function. An inner pipe (2) is set in outer pipe to supply reactant through nozzle orifice (4) on face surface (5) into a reaction chamber (6). A cooling passage (7) is provided for supplying coolant (8) at contact surface (9) between outer pipe and inner pipe. A groove is formed in cooling passage and inlet opening (10) is set for supplying coolant at nozzle shaft. An outlet opening (12) is formed for removing coolant from nozzle shaft and nozzle orifice.