天然气净化厂脱硫溶液污染物来源及发泡控制措施

Pollutants source and foaming control measures for desulfurization solution in natural gas purification plant

关键词:  天然气  净化  MDEA  发泡  热稳定盐

Key words:  natural gas  purification  MDEA  foaming  thermal stably salt

摘要:

中国石油西南油气田公司天然气净化总厂万州分厂自2009年建成投产后,脱硫塔拦液情况频发,每次检修后的平稳运行时间逐年缩短,严重影响了装置的安全、平稳运行,制约了渝东北的产能发挥。针对该问题,收集和分析了10年来天然气净化装置胺液发泡的相关数据,认为造成发泡的主要原因是溶液被内部产生及外部带入系统的热稳定盐、油、脂、金属等杂质污染。针对上述因素,分别阐述了两种因素带来的不同现象及相应的控制措施,结合逐渐形成的经验教训对装置进行优化管理,现已连续平稳运行3年。

Abstract:

Since 2009, PetroChina Southwest Oil & Gasfield Company, Wanzhou Branch of Natural Gas Purification Plant General had been built and put into production, the desulfurization tower flooding appeared frequently. The smooth running time reduced year by year after each overhaul, which seriously impacted the safety and steady operation of the devices and restricted the development capacity of the northeast of Chongqing. Aiming at the problem, after collecting and analyzing the data relevant to amine solution foaming of natural gas purification devices in the recent ten years, it was included that the main foaming reason was that the whole solution system was polluted by thermal stably salt, oil, fat, and metal elements, which were brought into the solution system internally or from external environment. According to above factors, this paper separately described different phenomena and corresponding measures. The unit management was optimized combined with the lessons and experiences formed gradually, and the whole plant has been running steadily for three years.