内蒙褐煤地下气化对地下水潜在的污染

发布时间：2017-12-27 02:34

本文关键词：内蒙褐煤地下气化对地下水潜在的污染　出处：《化学工程》2016年11期 　论文类型：期刊论文

【摘要】：采用富氧空气/水蒸气两阶段气化工艺,用自行研制的煤炭地下气化模拟试验系统,对内蒙褐煤进行地下气化模型试验,并收集气化后的煤气洗涤水。之后对煤气洗涤水的有机组分、挥发酚和氨氮进行检测,考察内蒙褐煤地下气化对地下水可能造成的污染。由结果可知:不同气化阶段煤气洗涤水的有机组分相似,均以酚类物质为主,酚类物质体积分数最高可达有机组分的76.82%。其次为多环芳香烃和杂环化合物,还含有少量的单环芳烃和脂肪烃,几乎不含卤代烃;水蒸气气化阶段煤气洗涤水中的多环芳烃和酚类化合物均比空气气化阶段的多,氨氮和挥发酚的浓度变化也符合这一规律。表明水蒸气气化剂对地下水的污染可能更严重。
[Abstract]:Based on the two stage gasification technology of oxygen enriched air / steam, the underground gasification experiment of Inner Mongolia lignite was carried out by self developed underground coal gasification simulation test system, and the gas washing water after gasification was collected. Then the organic components, volatile phenol and ammonia nitrogen of the gas washing water were tested to investigate the possible pollution of the underground gasification of Inner Mongolia lignite to the groundwater. According to the results, there are similar organic compounds in gas washing water at different gasification stages, which are mainly phenolics, and the volume fraction of phenolic compounds reaches 76.82% of the organic fraction. The polycyclic aromatic hydrocarbons and heterocyclic compounds, also contain a small amount of aromatic hydrocarbons and aliphatic hydrocarbons, hardly containing halogenated hydrocarbons; polycyclic aromatic hydrocarbons and phenols in steam gasification stage of gas washing water than air gasification stage, the concentration change of ammonia and volatile phenol also comply with this law. It shows that the water vapor vaporizing agent may be more serious in the pollution of the groundwater.
【作者单位】：河南理工大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(51174077) 教育部博士点基金资助课题(20124116110002)
【分类号】：X523;TD84
【正文快照】： 传统的采煤技术在环境和安全等方面存在不足,煤炭高效清洁的洁净煤技术对我国社会经济的发展尤为重要。煤炭地下气化(UCG)技术是集建井、采煤、煤炭气化为一体,通过煤的热化学作用产生可燃气体的采煤技术,具有安全性好、投资少、效益高、污染少等优点,被誉为新一代采煤技术[1]

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