| 摘要 |
<p>A burner nozzle and a coal gasifier. The burner nozzle comprises a nozzle housing (10). A fuel channel (20), a combustion-supporting gas channel (30), and a cooling channel (40) are disposed in the nozzle housing (10). A cooling cavity (50) is provided at a front end of the nozzle housing (10). A spiral pipeline (60) in communication with the cooling channel (40) is embedded in the cooling cavity (50), so as to form a spiral cooling flow passage. The spiral pipeline (60) embedded in the cooling cavity (50) forms the spiral cooling flow passage used as an independent pipeline, and therefore no angular connection with a wall surface of the nozzle housing (10) is required, so as to prevent cracking of the cooling cavity caused by a great temperature difference, uneven stress, and thermal fatigue at the connection corner, thereby improving the service life and reliability of the burner nozzle.</p> |
