| 典型工业生物质锅炉多环芳烃排放特征 |
| 摘要点击 2078 全文点击 677 投稿时间：2017-09-12 修订日期：2017-10-30 |
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| 中文关键词 生物质燃料 工业锅炉 多环芳烃 排放 成分谱 |
| 英文关键词 biomass fuel industry boil PAHs discharge source profile |
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| 中文摘要 |
| 选择13个不同类型的工业生物锅炉，利用气相色谱质谱联用技术，对其排放的15种PAHs进行研究.结果显示，Σ15PAHs排放量为0.02~27.8 g·h-1，排放浓度为0.77~3173 μg·m-3，各锅炉之间的排放量与浓度水平差别较大，最大排放量出现在PAHs含量与烟气流量均相对较高的第4号锅炉样品中，最大排放浓度值出现在第13号锅炉样品中.气相的PAHs是主要贡献源，其占比为45.9%~100%，颗粒相中的含量相对较低.组成以苊烯、菲、荧蒽、芘等低中环PAHs为主，各个生物质锅炉组成谱轮廓相近，总体浓度水平C3，4环 > C5，6环.生物质燃烧源诊断参数[荧蒽/（荧蒽+芘）]除了第4号锅炉的气相样品为0.4外，其余均大于0.5.O2与两相中的苊烯、苊、菲、蒽等有明显的正相关性，CO与苊及毒性相对较大的茚并[1，2，3-cd]芘、苯并[g，h，i]苝有明显相关性. |
| 英文摘要 |
| This research selected 13 types of industrial biomass boilers and used GC-MS technology to investigate the characteristics of 15 polycyclic aromatic hydrocarbons (PAHs) emitted from the boils. The results show that the total emissions of the 15 PAHs was 0.02-27.8 g ·h-1, and the concentration was 0.77-3173 μg ·m-3. There was a large different in the Σ15 PAHs concentration and emissions for each boiler. The maximum concentration appeared in the No.13 boiler sample, and the maximum emissions appeared in the No.4 boiler sample; these have relatively high concentrations of PAHs and large stack gas velocities. PAHs were found to be dominant in the gas phase, with a proportion of 45.9%~100%. Acenaphthylene, phenanthrene, fluoranthene, and pyrene were the main PAHs. The spectral distribution profiles of the 15 PAHs were similar, and the general concentrations were C3,4 rings > C5,6 rings. Diagnostic ratios the fluoranthene to fluoranthene plus pyrene (Flu/(Flu+Pyr)) from biomass combustion were greater than 0.5, except for the No.4 sample, which was 0.4. There were obvious positive interrelationships between O2 and acenaphthylene, acenaphthene, phenanthrene, and anthracene. In addition, there were obvious interrelationships between CO and indeno[1,2,3-cd]pyrene, benzo (g,h,i) perylene, and acenaphthene. |
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