| 生物质成型燃料锅炉挥发性有机物排放特征 |
| 摘要点击 1694 全文点击 993 投稿时间：2016-11-25 修订日期：2017-01-04 |
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| 中文关键词 挥发性有机物 生物质成型燃料 排放特征 臭氧生成潜势 锅炉 |
| 英文关键词 volatile organic compounds (VOCs) biomass pellet fuels emission profiles ozone formation potential boilers |
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| 中文摘要 |
| 以5台燃成型生物质燃料锅炉为研究对象，基于预浓缩-GC-MS/FID的测量方法，对成型生物质燃烧产生的烟气进行了挥发性有机物（VOCs）排放特征研究，同时还测定颗粒物、NOx、SO2和汞及其化合物的排放浓度.结果表明，5台锅炉所排放的SO2和汞及其化合物均低于排放标准要求，而氮氧化物和颗粒物的排放存在高于国标排放限值现象.56种VOCs总质量浓度在（872.43±293.80）~（6929.66±1137.25）μg·m-3之间，影响因素分析表明VOCs浓度与炉膛中心温度及负荷有较强负相关性.VOCs的排放中烯烃占比最大，达41%~59%，其次是烷烃和芳香烃，分别为27%~49%和6%~18%.烯烃的排放以乙烯、1-丁烯、顺-2-丁烯和1-己烯为主，烷烃以正己烷、异戊烷和环戊烷为主，芳香烃则以苯和甲苯为主.臭氧生成潜势采用最大增量反应活性法进行分析，5台锅炉的臭氧生成潜势贡献主要来自于烯烃，高达76%~90%，而烷烃也可占6%~19%. |
| 英文摘要 |
| A pre-concentrator-GC-MS/FID was used to investigate the characteristics of volatile organic compounds (VOCs) based on the flue gases emitted from five biomass-pellets-fired boilers in this study. And the concentrations of particle matter, nitrogen oxides (NOx), sulfur dioxides (SO2) and mercury and its compounds were also measured. Results demonstrated that the concentrations of SO2 and mercury and its compounds emitted from all five boilers were relatively low, which were lower than the national emission standard, while NOx and particles from some boilers were higher than the standard. The mass concentration of 56 VOC species was in the range of (872.43±293.80)-(6929.66±1137.25) μg·m-3, and the analysis of influencing factors implied that the furnace temperatures and loads havd strong negative correlations with the concentration of total VOCs. The emission components of VOCs were mainly composed of alkenes (41%-59%) including ethylene, 1-butene, cis-2-butene and 1-hexene; alkanes (27%-49%) including hexane, isopentane and cyclopentane; and aromatics (6%-18%) including benzene and toluene. Moreover, the maximum incremental reactivity (MIR) method was applied to analyze ozone formation potential (OFP) of VOCs. The contribution of OFP of five boilers was mainly from alkenes, occupying a relatively high percentage of 76%-90%, and that of alkanes was in the range of 6% to 19%. |
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