MDEA脱硫胺液发泡影响因素研究

Research on Influencing Factors of Foaming in Desulfurization Amine

摘要: MDEA (N-甲基二乙醇胺)溶液，广泛应用于天然气、油田气、煤气的净化工艺。胺液为易发泡体系，胺液发泡会引起脱硫装置液泛、溶剂损失、减产、净化气不合格等问题，甚至导致装置停车，影响脱硫装置的安全平稳运行。本文通过分析确定脱硫溶液中的污染物组成，分别开展单因素实验及不同种类杂质共同作用的正交实验研究各种污染物对MDEA胺液发泡性的影响，并采用数据分析软件对实验结果进行分析。结果表明，各类杂质中乙酸和二乙醇胺对胺液发泡促进效果最为明显，应针对性的防止胺液氧化降解现象发生。

Abstract: MDEA solution is widely used in the purification process of natural gas, oil field gas and coal gas. Amine liquid is an easy foaming system. The foaming of amine liquid will cause problems, such as flooding of the desulfurization device, solvent loss, production reduction, and unqualified purified gas, and even cause the device to shut down, affecting the safe and stable operation of the desulfurization device. The study determines the composition of pollutants in the desulfurization solution by analysis, studies the influence of various pollutants on the foamability of MDEA amine solution, carries out single-factor experiments and orthogonal experiments with different types of impurities, and uses data analysis software to conduct experimental results analysis. The results show that among various impurities, acetic acid and diethanolamine have the most obvious promotion effect on the foaming of amine liquid, and the oxidative degradation of amine liquid should be prevented.