引用本文:颜晓琴,刘艳,吴明鸥,谭雪琴,张小兵,闵杰,等. 醇胺脱硫溶液中铁离子的来源及其影响研究[J]. 石油与天然气化工, 2017, 46(6): 8-13, 18.
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醇胺脱硫溶液中铁离子的来源及其影响研究
颜晓琴1,2,刘艳3,吴明鸥1,2,谭雪琴1,2,张小兵4,闵杰5,王向林4
1.中国石油西南油气田公司天然气研究院;2.国家能源高含硫气藏开采研发中心 ;3.中国石油西南油气田公司川中油气矿磨溪天然气净化厂 ;4.中国石油西南油气田公司重庆天然气净化总厂遂宁龙王庙净化厂 ;5.中国石油西南油气田公司重庆天然气净化总厂万州分厂
摘要:
通过分析天然气净化装置中水样和固体样品开展模拟实验,研究了醇胺脱硫溶液中铁离子的来源及其影响。研究结果表明,醇胺脱硫溶液中铁离子含量增大,是因为装置中产生了较多的碳酸亚铁、乙酸亚铁等溶解度较高的腐蚀产物；脱硫溶液中铁离子含量增大后,会与硫化氢反应生成硫化亚铁沉淀,硫化亚铁沉淀不断积累,堵塞部分塔盘和富液过滤器,继而导致装置出现拦液问题。 
关键词:  天然气净化装置  醇胺脱硫溶液  铁离子 
DOI：10.3969/j.issn.1007-3426.2017.06.002
分类号:
基金项目:
Study on the source and influence of iron ions in alkanolamine desulfurization solution
Yan Xiaoqin1,2, Liu Yan3, Wu Mingou1,2, Tan Xueqin1,2, Zhang Xiaobing4, Min Jie5, Wang Xianglin4
1. Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan, China;2. National Energy R&D Center of High Sulfur Gas Exploitation, Chengdu, Sichuan, China;3. Moxi Natural Gas Purification Plant of Central Sichuan Oil & Gas District, PetroChina Southwest Oil & Gasfield Company, Suining, Sichuan, China;4. Suining Longwangmiao Purification Plant of Chongqing Natural Gas Purification Plant General, PetroChina Southwest Oil & Gasfield Company, Suining, Sichuan, China;5. Wanzhou Branch of Chongqing Natural Gas Purification Plant General, PetroChina Southwest Oil & Gasfield Company, Wanzhou, Chongqing, China
Abstract:
The source and influence of iron ion in alkanolamine desulfurization solution were studied by analyzing the sample and carrying out the simulation experiment. The results showed that the increase of iron ion content in alkanolamine desulfurization solution was due to the formation of corrosion products, such as ferrous carbonate and ferrous acetate, which had high solubility; while the iron ion content in the desulfurization solution increased, the iron ion will react with the hydrogen sulfide to generate ferrous sulfide precipitation, and the ferrous sulfide precipitation will accumulate continuously and block the tray and rich liquid filter, ultimately lead to unit liquid flooding.
Key words:  natural gas purification unit  alkanolamine desulfurization solution  iron ion