| 摘要 |
A burner includes a gas distribution loop (2), an air distribution loop (3), a plurality of gas nozzles (2d), a plurality of air nozzles (3d), an annular premixing groove (4) and a plurality of flow equalizing-choking stoppers (5). The gas distribution loop (2) which is similar to the air distribution loop (3) in structure, includes a loop body (2a), an inlet (2b) located at the maximal section of the loop body (2a) and a plurality of outlets (2c) along the circumference of the loop body (2a). Thereinto, from the first side of the loop body (2a) where the inlet (2b) located to the second side of the loop body (2a) at the largest distance from the inlet (2b), the cross-section area of the loop body (2a) is gradually reduced. The gas nozzles (2d) and the air nozzles (3d) connect to the outlets (3c, 2c) of the gas distribution loop (2) and the air distribution loop (3) respectively, and arrange alternatively, evenly and annularly. The annular premixing groove (4) communicates the gas nozzles (2d) and the air nozzles (3d). At least parts of the flow equalizing-choking stoppers (5) are over against the gas nozzles (2d) and the air nozzles (3d). |
