| 摘要 |
PURPOSE:To restrain generation of nitric oxide in such a way that air for primary combustion is made less than theorematic air gain, air for secondary combustion gets flowed into flame through cooling water pipes which are allocated in the propinquity of the secondary combustion range on the downstream side of the combustion chamber. CONSTITUTION:Fuel flowing out of a fuel feeding port 2 is burned in the primary combustion chamber 4 with use of air flowing through a primary air feeding port 3, while it comes into a secondary combustion chamber 9 in the condition of imperfact combustion because air gain for the primary combustion is less than theorematic air gain. Air necessary for the secondary combustion passes from an air feeding port 5 for the secondary combustion through an air diffuser 7 by way of a gap 8 of a cooling water pipe 6 before mixing with the primary combustion gas. In consequence, unburnt lot in the primary combustion gas burns near by the cooling water pipe 6 with use of air flowing through the gap 8 of the cooling water pipe 6, while combustion temperature is kept in lower temperature by dint of cooling with use of the cooling water pipe 6. Thus, the generation of azotic oxide is restrained. |
