微波处理炼焦烟气中多环芳烃的基础研究

发布时间：2018-07-01 15:21

  本文选题：多环芳烃 + 炼焦烟气　； 参考：《华北理工大学》2017年硕士论文

【摘要】：21世纪以来,随着人类对环保认识不断深入,由焦化带来的环境问题也越来越引起人们的关注,特别是焦化烟气中存在大量的美国EPA优先推荐处理的16种多环芳烃:萘、苊、苊烯、芴、菲、蒽、荧蒽、芘、苯并[a]蒽、(?)、苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]芘、茚[123-cd]并芘、二苯并[a,h]蒽、苯并[g,h,i]傒,极易对人体的呼吸道等器官造成严重的危害,导致肺癌、食道癌等疾病发生。微波作为一种清洁、节能环保的处理技术有利于在炼焦烟气中多环芳烃的处理。首先通过FLUENT软件模拟,对40kg实验室焦炉的温度场进行了模拟,并结合各阶段多环芳烃产生规律,得到炼焦过程多环芳烃产生的温度区间为700~1000℃。通过采用竖式电炉模拟制备炼焦烟气,并对裂解烟气通入微波管式炉进行微波处理,以二氯甲烷和玻璃纤维对多环芳烃进行采集,高效液相色谱法定性、定量分析,研究了不同处理温度和吸波介质条件对微波处理炼焦烟气中多环芳烃效果的影响,为炼焦烟气中多环芳烃的末端处理提供可靠的理论依据。通过不同微波温度对多环芳烃的处理效果的影响研究得到,当微波温度为400℃时,烟气中多环芳烃的处理效率达37.30%,16种多环芳烃总体处理效果最佳。通过对多环芳烃环数的处理分析,四环和五环多环芳烃的处理效果较好。通过研究活性炭和碳化硅两种吸波介质粒径和用量对多环芳烃处理的影响得出,当以活性炭为吸波介质时,采用粒径6mm,质量5g活性炭,微波处理为温度400℃时,对炼焦烟气中多环芳烃的处理效果最好,处理效率为44.76%;而以碳化硅为吸波介质时,当微波温度400℃时,200目粉末状碳化硅的用量为6g时,处理效率可达49.10%;采用微波降解联合活性炭吸附耦合处理方法,当微波温度400℃,吸波介质活性炭粒径4mm时,对炼焦烟气中多环芳烃的处理效果最好,处理效率可达90%以上。
[Abstract]:Since the 21st century, with the deepening of human understanding of environmental protection, the environmental problems caused by coking have attracted more and more attention. In particular, there are a large number of 16 PAHs: naphthalene, acenaphthene, which are first recommended by American EPA in coking flue gas. Acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo [a] anthracene, benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [a] pyrene, indene [123-cd] and pyrene, dibenzo [ahuh] anthracene, benzo [] anthracene, benzo [123-cd] anthracene, benzo [a] anthracene, etc. Diseases such as esophageal cancer occur. As a clean, energy saving and environmental protection technology, microwave is beneficial to the treatment of polycyclic aromatic hydrocarbons (PAHs) in coking flue gas. Firstly, the temperature field of coke oven in 40kg laboratory was simulated by fluent software, and the temperature range of polycyclic aromatic hydrocarbons (PAHs) in coking process was obtained by combining with the law of polycyclic aromatic hydrocarbons (PAHs) generation in different stages. The temperature range of PAHs in coking process was 700 鈩，

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