胺液在线深度复活装置的设计及应用

Design and application of on-line deep reactivation device for amine solution

关键词:  天然气  脱硫装置  胺液  在线深度复活  热稳定盐  致泡变质产物  树脂 

Key words:  natural gas  desulfurization unit  amine solution  on-line deep reactivation  heat stabilized salts  foaming metamorphic products  resin

摘要:

目的解决天然气净化厂脱硫装置胺液系统中由于醇胺溶液自身降解与外来污染所导致的脱硫性能下降、腐蚀穿孔、发泡停产等一系列问题。 方法对溶液系统污染物来源进行解析,为有效降低溶液中的污染物、降解物和烃类杂质等,采取了以下措施:①增设原料气预处理设施；②设置溶液过滤器；③增设胺液在线深度复活系统等设施。 结果胺液在线深度复活装置可有效去除溶液中热稳定盐及致泡物质,使溶液的发泡高度由500 mm降至30 mm,消泡时间由110 s降至5 s。 结论通过对胺液进行深度复活,保证溶液的洁净度,恢复溶液性能,可大幅度降低脱硫装置的发泡频率,更好地保障天然气净化装置的平稳高效运行。 

Abstract:

ObjectiveThe aim is to solve a series of problems, such as the decrease of desulfurization performance, corrosion perforation, foaming and shutdown caused by the self-degradation of alcohol amine solution and external pollution in amine solution system of desulfurization unit in natural gas purification plant. Methods The solution system pollutants were analyzed to reduce the pollutants, degradation products and hydrocarbon impurities.The following measures were taken to achieve this goal. Firstly, the pretreatment facilities for feed gas was added. Secondly,the solution filter was set. Thirdly,facilities such as an on-line deep reactivation system of amine solution were added. ResultsThe on-line deep reactivation device of amine solution could effectively remove the heat-stable salt and foaming substances in the solution, reduce the foaming height of the solution from 500 mm to 30 mm, and reduce the defoaming time from 110 s to 5 s. ConclusionsBy the deep reactivation of the amine solution to ensure the cleanliness of the solution and restore the performance of the solution. This will significantly reduce the frequency of foaming in the desulfurization unit and ensure a stable and efficient operation of the natural gas purification device.