乙二胺四乙酸铁络合物湿法络合脱硝液的再生研究进展

doi:10.16085/j.issn.1000-6613.2017-0898

摘要/Abstract

摘要： 近年来，面对大气污染日益严峻的现状，用于燃煤烟气中氮氧化物减排控制技术的研发显得尤为关键。乙二胺四乙酸铁络合物（Fe （Ⅱ） EDTA）络合脱硝法由于吸收速率快、络合容量大以及可应用于脱硫被广泛研究。但是Fe （Ⅱ） EDTA易被氧气氧化为Fe （Ⅲ） EDTA，从而失去对氮氧化物的络合能力，因此为了提高Fe （Ⅱ） EDTA脱硝效率，Fe （Ⅱ） EDTA再生十分必要。本文综述了Fe （Ⅱ） EDTA再生技术，详细介绍了含硫化合物、金属粉末、尿素、有机物、催化剂以及微生物再生Fe （Ⅱ） EDTA的原理，并阐述了各种再生技术的技术特点，指出了各种再生方法的优势与不足，并对各种再生技术工业化现状进行了分析。最后指出微生物再生Fe （Ⅱ） EDTA是前景较好的再生技术，研究好氧微生物菌种再生Fe （Ⅱ） EDTA以及微生物再生Fe （Ⅱ） EDTA的设备，发展一套高效的微生物再生Fe （Ⅱ） EDTA与湿法脱硝一体化吸收工艺，是再生Fe （Ⅱ） EDTA技术未来的发展方向。

关键词: 乙二胺四乙酸铁络合物, 湿法脱硝, 再生, 烟道气, 吸收, 工业化

Abstract: In recent years, with the increasingly serious situation of air pollution, the research of control technology of NO_x emission in coal-fired flue gas is particularly critical. Wet denitrification with Fe(Ⅱ)EDTA has been widely researched due to the fast absorption rate, large complex capacity and good capacity of wet desulfurization, but Fe(Ⅱ)EDTA can be easily oxidized by oxygen to Fe(Ⅲ)EDTA, losing the complexing ability to NO. Therefore, in order to improve the denitrification efficiency of Fe(Ⅱ)EDTA, it is necessary for Fe(Ⅱ)EDTA regeneration. In this paper, the research progress of the regeneration technology Fe(Ⅱ)EDTA was presented. The principles and properties of the regeneration with sulfur compounds, metal powder, urea, organic compound, catalyst, and microorganism were respectively explained. Then their own advantages and shortcomings were elaborated and the industrialization with these regeneration technologies were analysed. Finally, it is pointed out that microbial regeneration of Fe(Ⅱ)EDTA is a promising regeneration technique. Studying Fe(Ⅱ)EDTA regeneration with aerobic bacteria, exploring the equipment of microbial Fe(Ⅱ)EDTA regeneration, and developing an efficient absorption process integrated microbial regeneration of Fe(Ⅱ)EDTA, is the future direction of Fe(Ⅱ)EDTA regeneration.

Key words: Fe (Ⅱ) EDTA, wet denitrification, regeneration, flue gas, absorption, industrialization

中图分类号:

X701

何飞强, 邓先和, 陈民. 乙二胺四乙酸铁络合物湿法络合脱硝液的再生研究进展[J]. 化工进展, 2018, 37(02): 737-743.

HE Feiqiang, DENG Xianhe, CHEN Min. Research progress on Fe(Ⅱ)EDTA regeneration accompanied wet denitrification[J]. Chemical Industry and Engineering Progress, 2018, 37(02): 737-743.

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