Abstract:

Desulfurization and decarburization amines become metamorphic because of the degradation and mixed impurities during the long running period, leading to the efficiency decline of desulfurization and decarburization, amine foaming, equipment corrosion, increase of energy consumption and so on. The technology of the amine purification and reclamation is the effective means to solve the amine system problems. The origin, harm and control measures of the amine contaminants such as solid particle, hydrocarbon and surfactant, amine metamorphic product, and heat stable salts in metamorphic amine have been summarized in the first. Then towards the main refractory pollutants such as heat stable salts, the technology principle, the research and application of purification and reclamation technologies such as distillation recovery, ion exchange, and electrodialysis have been introduced, and the technology characteristic have been summarized. In the end, by comparison of amine purification and reclamation technologies, electrodialysis is considered as the most potential development direction in the field of amine purification and reclamation in China, owing to the characteristics such as high amine recovery, deep heat stable salts purification, moderate energy consumption, and low easily-treated pollutant level.

Key words: amine, degradation, metamorphic, corrosion, pollution, impurity, purification and reclamation

摘要：

用于脱硫及脱碳的胺液在长期使用中因降解或杂质混入发生变质，导致脱硫脱碳效率下降、胺液发泡、装置腐蚀及能耗增大等系列问题，而胺液净化复活技术是解决胺液系统问题的有效手段。本文从变质胺液中污染物出发，分别总结了固体颗粒物、烃类及表面活性物质、胺变质产物及热稳定盐的成因、危害及其控制手段。针对热稳定盐等重点难处理污染物，主要介绍了蒸馏回收、离子交换以及电渗析等净化技术的技术原理及国内外研究与应用概况，并对技术特点进行总结分析。最后通过技术对比指出，电渗析因具备胺液回收率高、热稳定盐净化深度高、能耗适中、产生少量易处理污染物等特点，是我国在胺液净化复活技术领域最具潜力的发展方向。

关键词: 胺液, 降解, 变质, 腐蚀, 污染, 杂质, 净化复活