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燃煤、燃油的工厂所排放的烟气中含有一定浓度的SO_2及NO_x。它们是造成大气污染和酸雨的主要物质。它使大片森林死亡、水生生物灭绝、农作物大面积减产。在医学方面,低浓度SO_2长期作用于上呼吸道和肺部,会引起呼吸道功能降低,引起和加重呼吸系统疾患。 对排放的烟气进行处理,消除其中的SO_2和NO_x是一种有效的治理措施。实际应用的烟气脱硫方法已有十多种。这些方法从经济、脱硫效率、以及产生二次污染物等方面看,均还
Flue gas emitted from coal-fired and oil-fired plants contains a certain concentration of SO 2 and NO x. They are the main source of air pollution and acid rain. It killed large tracts of forest, extinction of aquatic life, and large-scale crop cuts. In medicine, long-term effects of low concentrations of SO 2 on the upper respiratory tract and lungs can cause respiratory tract function decline, causing and aggravating respiratory disorders. The treatment of flue gas emissions, which eliminate the SO 2 and NO_x is an effective control measures. There are more than ten kinds of flue gas desulfurization methods actually used. These methods are still from the economic, desulfurization efficiency, as well as the secondary pollutants produced