According to the law of the People's Republic of China on the prevention and control of atmospheric pollution, Beijing "boiler air pollutant emission standard" (DB11/139-2015), since April 1, 2017, the concentration of gas boiler emissions more than 80 mg/cubic meter of the unit should be about 10, 1 million fine, if the circumstances are serious, shall be ordered to shut, shut down. 2017 is the key year of "clean coal and reduce nitrogen". This year more and more enterprises are joining the trend of boiler reform.
Note for boiler low nitrogen burner renovation 1: inspection before commissioning
Check whether the gas of the low nitrogen burner is in place, whether the gas pipeline is clean and free, and whether the valve has been opened. Low nitrogen burners with or without pipeline leakage, pipeline installation is reasonable. Drain air from the pipe in front of the gas valve to ensure that there is no mixed air in the pipeline and the drain pipe should be outside.
Attention to the reform of boiler low nitrogen burner two: combustion stability and dynamic balance
Remember that combustion adjustment is the basis of all low nitrogen burner adjustment, combustion is essential for steam temperature, under any condition change, no matter as long as the guarantee stability and combustion of dynamic balance, because the steam temperature is a sign of flue gas heat and steam heat absorption phase equilibrium, as long as you can to maintain the dynamic balance, steam temperature can remain stable.
Note for boiler low nitrogen burner renovation 3: boiler flame center
The height of the boiler flame center is also an important factor influencing the temperature of steam. When the temperature of steam is high, the amount of coal in the upper exhauster can be reduced and the amount of coal in the lower burner can be increased, and vice versa. Also note in the operation of the low nitrogen burner in coal mill run different combinations of the influence of steam temperature, discharge low level of combined smoke temperature steam temperature regulation margin, and combination on the smoke temperature caused high steam temperature regulating margin small yi chao wen, according to the situation in a timely manner to strengthen blowing and pay attention to adjust the air distribution.
Nitrogen burner on the market because of the low boiler operating time is short of, understanding of the problem is not enough, but not enough experience to deal with problems, coal-fired power plants to alleviate environmental pressure, reduce nitrogen emissions technology still need further research and development, choose low nitrogen burner that is worth of trust is particularly important. More importantly, after the application of new emission reduction technologies and environmental protection facilities, the capacity to deal with problems will be further improved, so as to achieve greater environmental benefits for the sustainable development of coal-fired power plants.