【摘要】 可凝结颗粒物(CPM)是指在固定污染源排气中在采样位置处为气态、离开烟道后在环境状况下降温数秒内凝结为液态或固态的一类颗粒物。采取过滤-捕集-烘干称重的方式测定固定源的颗粒物浓度,无法对气态CPM进行有效捕集而逃脱监测,导致固定污染源排放清单不完善。为了减少固定污染源CPM的排放,并准确地评估固定污染源对大气环境的影响,国内外学者对CPM测试方法、排放特征及转化机理进行了研究,使得CPM逐渐成为研究热点。该文从CPM问题的由来、其测试方法问题及采样装置的改进等方面入手,总结多种固定污染源CPM的量级和成分谱,描述燃煤电厂CPM排放特征及转化机理,并指出当前研究存在的问题,明确下一步研究方向。更多还原

【Abstract】 Condensable particulate matter(CPM) means material that is vapor phase at stack conditions, but condenses and/or reacts upon cooling and dilution in the ambient air to form solid or liquid particulate matter immediately after discharge from the stack. In China, the standard method of testing PM emitted from stationary sources is filtration-collection-drying weighing.Therefore, the gaseous CPM cannot be captured and monitored, resulting in the failure of getting accurate emission lists of stationary sources. In order to reduce the emission of CPM and accurately assess the impact of stationary pollution sources on the atmospheric environment, domestic and foreign researchers have studied CPM testing methods, emission characteristics and transformation mechanism. The recent researches on the origin of CPM, the test methods and sampling device, and the magnitude and composition were reviewed, and the emission characteristics and the transformation mechanism of CPM emitted from coal-fired power plant were described. Finally, the existing problems of current research were pointed out for future study.更多还原