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为了控制大气污染,研究了大容量燃煤锅炉对大气环境中水溶性离子排放特性。以采用四角切圆和旋流对冲燃烧方式的大容量电站燃煤锅炉各一台为研究对象,通过现场采集锅炉产生的可吸入颗粒物,对其进行化学分析。结果表明,采用旋流对冲燃烧方式的锅炉排放的水溶性离子浓度均高于采用四角切圆燃烧方式的锅炉。采用这两种燃烧方式的电站锅炉排放的水溶性离子均为细模态占优状态,其中旋流对冲燃烧方式排放的水溶性离子在细模态上所占份额最高可达82%。C a2+和SO42-是主要的水溶性离子,对旋流燃烧锅炉,分别占水溶性离子质量总和的38%和30%;对四角切圆燃烧锅炉,分别占水溶性离子质量总和的49%和35%。
In order to control the air pollution, the characteristics of water-soluble ions in the atmosphere of large-capacity coal-fired boilers were studied. In this paper, one of the large-capacity coal-fired power station boilers, which uses the tangential and swirling heliostats, is used as the research object. Respirable particulate matter produced by the boiler is collected on site and chemically analyzed. The results show that the concentration of water-soluble ions emitted by the swirling hedge combustion boiler is higher than that of the boiler by the tangential combustion. The water-soluble ions emitted by the power plant boilers using these two combustion modes are in the fine mode state, in which the water-soluble ions released by the swirling hedge combustion mode occupy a maximum of 82% of the fine mode. C a2 + and SO42- are the major water-soluble ions, accounting for 38% and 30% of the total mass of water-soluble ions for the swirling boiler respectively; for tetragonal tangentially fired boilers, accounting for 49% of the sum of water- 35%.