脱硝设备入口NOx浓度经济值的控制

摘要

The methods of computing the indirect running costs of the low NOx staged combustion technology and the direct running costs of the reducing agent of SCR equipment are introduced. An equation for calculating the total costs of NOx reduction with the two methods of NOx control used in boilers is established. According to the principle of minimizing the total costs of NOx reduction, the NOx concentration at the inlet of SCR equipment is taken as the variable and, a viewpoint on the existence of the economic inlet NOx concentration is put forward. The main conclusion is that the economic concentration is a critical value for equitably assigning the indirect costs of low NOx staged combustion technology and the direct costs of SCR equipment. Only when the NOx concentration is the economic value, are the total costs of NOx reduction the least.%介绍了应用最为广泛的低NOx空气分级燃烧技术的间接运行费用与锅炉尾部烟气脱硝设备(脱硝设备)消耗还原剂的直接运行费用的计算方法,建立了两者配套应用时锅炉NOx减排总费用的关系式；并按照NOx减排总费用最小的原则,将脱硝设备入口NOx浓度作为变量,提出了两者配套应用时脱硝设备入口必然存在NOx浓度经济值的观点.主要结论为:脱硝设备入口NOx浓度经济值是合理分配炉内空气分级燃烧技术的问接运行费用与脱硝没备直接运行费用的关键参数,NOx浓度只有在该经济值下,NOx减排的总费用才是最低的.