| 摘要 |
<p>A burner nozzle and a coal gasifier comprising the burner nozzle. The burner nozzle comprises a nozzle housing (10). A fuel pipe (20) and a combustion-supporting gas pipe (30) are disposed in the nozzle housing (10). The combustion-supporting gas pipe (30) surrounds the fuel pipe (20). An outlet end portion of the combustion-supporting gas pipe (30) protrudes from an outlet end portion of the fuel pipe (20). A dividing pipe (40) is disposed in the combustion-supporting gas pipe (30), and divides the combustion-supporting gas pipe (30) into a first combustion-supporting gas pipe (31) and a second boundary gas pipe (32). The second boundary gas pipe (32) is formed on an external side of the first combustion-supporting gas pipe (31). The outlet end portion of the fuel pipe (20) protrudes from an end portion of the dividing pipe (40). The combustion-supporting gas in the second boundary gas pipe (32) is capable of forming a boundary film on an inner wall of the outlet end portion, so as to protect the outlet end portion of the combustion-supporting gas pipe (30) and prevent the fuel sprayed by the fuel pipe (20) from wearing the outlet end portion of the combustion-supporting gas pipe (30), thereby extending the service life of the nozzle.</p> |
