MDEA脱硫溶液发泡研究

Study on the foaming of MDEA desulfurization solution

关键词:  MDEA  脱硫  发泡  致泡因素 

Key words:  MDEA  desulfurization  factors caused foaming

摘要:

大型天然气处理装置普遍采用醇胺法工艺,目前主要使用MDEA及其配方溶剂对酸性天然气进行净化处理。由于MDEA溶液本身抗污染能力存在不足,加之醇胺溶液的降解、变质、腐蚀等因素,溶液发泡的情况时有发生,影响了装置的平稳操作,导致产品气不合格,造成溶剂大量损失,严重时甚至引起装置停车。从发泡机理入手,通过开展大量实验,系统地评价了MDEA溶液系统中存在的多种杂质对脱硫溶液发泡的影响,对实际生产可起到一定的借鉴作用。 

Abstract:

Alkylol amine technique is adopted at natural gas processing plant in a large scale, and MDEA or formula solvents are mainly used to purify sour natural gas. Because of the poor anti-pollution ability of MDEA, as well as the degradation, deterioration and corrosion of alkanolamine solution, solution foaming always occurs, which affects the smooth operation of the unit and may even lead to substandard product gas, solvents loss and plant shutdown. In order to solve the problem, many experiments were carried based on foaming mechanism, and the influence of different impurities in MDEA on foaming of desulfurization solution were systematic analyzed, which would provide reference for actual production.