天然气减阻剂研究进展

Research Progress in Drag Reducing Agents with Inhibition Performance for Natural Gas

减阻剂加注是一种重要的天然气管道增输技术,加注减阻剂克服了管道内涂层使用寿命短、易脱落、不可再次涂覆、无法应用于旧管道和施工复杂等缺点,可有效提高输送量,并能保证管线的安全运行。综述了天然气减阻剂的减阻机理及国内外关于减阻剂发展的技术现状,详细叙述了天然气管道实施减阻的原因、减阻剂的室内成膜性和稳定性评价以及环道评价测试装置和测试过程。依据合成方法,将减阻剂分为Mannich碱类、咪唑啉类、酰胺类、磷酸酯类和聚合物类,并分别对其进行了论述和举例。同时还指出了天然气减阻剂的适用范围,从减阻机理、分子结构设计、评价方法和现场应用技术等方面提出了目前研究中存在的问题,对于深入研究减阻剂减阻机理、合成、评价方法和在大口径管线的应用提出了一些建议。

Drag reducing agents（ DRAs） technology is an important technology in pipeline transportation for natural gas.DRAs can overcome the defects of undercoat,such as short service life,ease to fall off,unable to be re-coated,and not applicable to old pipeline,complex construction,and so on. DRAs can effectively improve the flow and meanwhile ensure the safe operation of the pipeline. In this paper,the current research status of the drag reducing agent technology for natural gas as well as the drag reducing mechanism was reviewed. The reasons for the drag reduction of natural gas pipeline,evaluation of indoor film forming and stability for DRAs,and device and procedure of loop testing were discussed in detail. According to the synthesis method,DRAs were classified as Mannich bases,imidazolines,amides,phosphates and polymers. And they were discussed and illustrated respectively,on the basis of classification. And the scope of application for DRAs was given and the existing problems in research were presented from the aspects of mechanism,design of molecular structure,evaluation methodology and technology of practical application. Some suggestions were given for drag reducing mechanism,synthesis,evaluation methodology of drag reducing agents and their application in large-diameter pipeline.