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近几年来,美国和日本等发达资本主义国家在制造新式动力锅炉和其它燃烧装置时,对动力机械制造者提出的任务是降低NO_x的排放量。这个问题的复杂性首先是NO_x排放量的标准值不断降低。此外,正是在最近几年,美国、日本、西德和其它一些国家中的燃料平衡有了明显变化:缩减在生态上比较清洁的天然气和重油的消费量,增加对煤的需要量(煤中氮的折算含量比重油几乎高10倍,比天然气就高得更多,天然气中氮化物含量接近为零)。例如,在美国从1980～2000年之间,液体燃料在工业、生活、运输等方面有机燃
In recent years, developed capitalist countries such as the United States and Japan have been mandating the manufacturers of power machinery to reduce NO x emissions when manufacturing new power boilers and other combustion equipment. The complexity of this problem is above all the continuous reduction of the standard value of NO_x emissions. In addition, it is precisely in recent years that the fuel balance in the United States, Japan, West Germany and other countries has changed markedly: to reduce the consumption of more ecologically clean natural gas and heavy oil, to increase the demand for coal The converted content of nitrogen is almost 10 times higher than that of heavy oil, much higher than that of natural gas, and the content of nitrides in natural gas is close to zero. For example, in the United States from 1980 to 2000, liquid fuels were burned mechanically, industrially, transported, etc.