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首页> 外文期刊>Journal of Sustainable Mining >Assessment of Hazard Due to Release of Gaseous Ammonia from the Fly Ash-Water Mixture Applied in Longwall Mine Gobs
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Assessment of Hazard Due to Release of Gaseous Ammonia from the Fly Ash-Water Mixture Applied in Longwall Mine Gobs

机译：评估长壁矿采空区粉煤灰水混合物中释放的气态氨所致的危害

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PurposeThe introduction of flue gas denitrification technologies by selective catalytic reduction (SCR) or selective non-catalytic reduction (SNCR) in coal fired plants resulted in an increase of ammonia content in fly ash. The utilization of fly ash in fire and ventilation prevention of hard coal mines causes the release of ammonia from a fly ash-water mixture. In the applied technology of the ash and water mixture, ammonia in gaseous form is discharged and mixes with the air flowing through the mine airways. In this article, reference is made to the risk assessment of gaseous ammonia in the longwall area during the application of the fly ash-water mixture to the gobs in the U-tube ventilation system.MethodsThe test methods include: ammonia release from ash and water mixtures at various temperatures and in respect to different proportions of water to ash with use of a multigas analyzer with an FTIR detector.ResultsThe results of the laboratory tests helped to determine the size of the ammonia stream released from the fly ash-water mixture in respect to different ratios of water to ash.Practical implicationsLaboratory studies allow for ventilation and gaseous analysis to assess the level of ammonia risk, in the mine airways, from exhaust air discharged from the longwall area.Originality/valueBased on the literature review, this type of research has not been carried out so far.
机译：目的在燃煤电厂中通过选择性催化还原（SCR）或选择性非催化还原（SNCR）引入烟气脱氮技术导致粉煤灰中氨含量的增加。粉煤灰在硬煤矿的防火和通风中的利用导致从粉煤灰-水的混合物中释放氨。在粉煤灰和水的混合物的应用技术中，气态氨被排出并与流过矿井气道的空气混合。本文参考了在U型管通风系统中将粉煤灰-水混合物应用到采空区中时，在长壁区域中气态氨的风险评估方法。测试方法包括：灰分和水中的氨释放使用带有FTIR检测器的多气体分析仪，在不同温度下以及相对于水和灰分的不同比例混合混合物。结果实验室测试的结果有助于确定从粉煤灰-水混合物释放的氨流的大小实际意义实验室研究允许进行通风和气态分析，以评估从长壁区域排出的废气中矿井气道中氨气的危害水平。到目前为止，尚未进行任何研究。

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