中国关于水合物在管道中的生成过程研究进展

doi:10.16085/j.issn.1000-6613.2017-1632

摘要/Abstract

摘要： 近几年来，水合物浆液混输技术作为多相安全混输的方式受到了越来越多的重视。本文主要对中国近三年在多相流管道中水合物生成过程、水合物聚并理论和水合物颗粒管壁沉积理论三方面的研究成果进行了介绍，并提出了未来的发展方向。在多相流管道中水合物生成过程方面，主要总结了国内学者在不同的管输介质和流量压降的条件下，通过实验得出的管道内水合物生成过程的研究结论以及表面活性物质对管道中水合物宏观形态演化过程的影响和管线堵塞的条件等；在水合物聚并理论方面，主要对液桥力颗粒聚并原理和水合物诱导原理两种假设进行介绍并提出不足；由于水合物聚并理论无法解释水合物生成时管路压降会出现大幅增加的现象，因此近些年来出现了水合物颗粒管壁沉积理论，但关于该理论的研究较少。文章指出未来的发展方向如下：①深入研究多相流管道中水合物生长过程与管输介质种类、流量、压降、含水率以及在实际工程中沿程管路落差和温度变化等因素的耦合关系，并建立数学模型；②探讨不同情况下加入新型防聚剂对管线中水合物宏观形态演化的影响作用以及不同介质情况下管线堵塞的条件；③目前关于水合物聚并机理主要有液桥力颗粒聚并原理和水合物诱导原理两种假设，并且该两种假设均有一定的实验结论支撑，因此未来关于水合物聚并机理的研究重点应该放在这两种学说的区分与联系上；④国内关于水合物管壁沉积理论研究极少，未来应着重这方面的研究。

关键词: 水合物浆, 聚并理论, 管壁沉积理论, 液桥

Abstract: As a new type of hydrate control method and multiphase safe mixing method, hydrate slurry mixing infusion technology has attracted more and more attention. In this paper, the research of hydrate formation process, hydrate coalescence theory and deposition theory of hydrate particle tube wall are introduced in recent three years in China, and the future research direction is presented. The research conclusions of hydrate formation process in pipeline which are obtained by experiment under the condition of different pipe transportation media and pressure drop as well as the influence of inhibitor on macroscopic evolution of hydrate in pipeline and the conditions of plugging of pipeline are summarized. In the aspect of hydrate coalescence theory, two hypotheses including particle coalescence principle and hydrate induction principle are introduced and the research deficiencies are put forward. Because the hydrate coalescence theory cannot fully explain the phenomenon that the pipeline pressure drop will increase sharply when hydrate formation occurs, the theory of deposition of hydrate particles has been developed in recent years, but few studies have been done on the theory in China. The future directions of development are as follows. ① The coupling between hydrate growth process and the types of pipe conveying media, flow rate, pressure drop, water cut as well as the change of pipe fall and temperature in the actual engineering should be studied, and establish mathematical model;② The influence of adding new type inhibitor on the macroscopic morphology evolution of hydrate in pipeline under different conditions should be investigated as well;③ At present, there are two main hypotheses about hydrate coalescence:particle coalescence principle and hydrate induction principle, but there are some experimental supports for this two hypotheses. Therefore, the study of the mechanism of hydrate coalescence in the future should be focused on the distinction and relation between these two theories; and ④ In China, there is little theoretical research on the pipe wall deposition, thus the future should focus on this aspect.

Key words: hydrate slurry, coalescence theory, pipe wall deposition theory, liquid bridge

中图分类号:

TQ022.115

孙贤, 刘德俊, 崔启华, 吴玉国. 中国关于水合物在管道中的生成过程研究进展[J]. 化工进展, 2018, 37(07): 2565-2576.

SUN Xian, LIU Dejun, CUI Qihua, WU Yuguo. Research progress on formation of hydrates in pipelines in China[J]. Chemical Industry and Engineering Progress, 2018, 37(07): 2565-2576.

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