After the transformation of the low nitrogen burner, the nozzle of the low nitrogen burner is about 1m lower than the original. During the analysis, with the bottom burner as the benchmark, the height of the remaining burner moves downward, causing the flame center to drop simultaneously, reducing the heat absorbed by all heated surfaces, thereby lowering the outlet smoke temperature. The modified low nitrogen burner has a great influence on the temperature of reheating steam. Due to the slow coordination of boiler unit and the incoordination of pressure tracking and adjustment, it is easy to cause the problem of excessive adjustment, which will also lead to the instability of steam temperature.
In addition, due to the low oxygen combustion should be paid attention to in the primary and secondary air ratio process, so the steam temperature adjustment will be limited, the whole adjustment time can not be shortened, the unit operation efficiency can not be improved. In order to ensure that the outlet temperature is within the standard range, the upper powder manufacturing system can be used in the low load stage, and the height of the nozzle can be appropriately raised, but this adjustment can make the low nitrogen steam into the standard range, which has become an important issue in the transformation of the low nitrogen burner.
In the process of transformation can be appropriate to adjust burnt out the nozzle of the wind, if adjust the nozzle of the burning wind be upward swing, reheat steam temperature would rise in the state, if adjust the nozzle of the burning wind become downward swing, reheat steam temperature will reduce until in standard range, therefore, Through this principle, the low nitrogen burner can be adjusted appropriately in the process of boiler operation.
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