李欣泽,袁亮,张超,王梓丞,邢晓凯,熊小琴,陈晓玲,尚妍,张文辉,陈潜
LI Xinze,YUAN Liang,ZHANG Chao,WANG Zicheng,XING Xiaokai,XIONG Xiaoqin,CHEN Xiaoling,SHANG Yan,ZHANG Wenhui,CHEN Qian

• 1:中国石油大学(北京)克拉玛依校区工学院
• 2:中国石油新疆油田公司开发公司
• 3:中国石油新疆油田公司基本建设工程处
• 4:中国石油新疆油田公司工程技术研究院

摘要(Abstract)：

长距离超临界CO_2管道瞬态输送的核心技术还有待突破，相关模型和方法亟需工业规模示范工程的验证及修正。以成就型综述法，对超临界CO_2管道输送过程中停输、水击、泄漏和放空工况下形成的CO_2瞬态流加以描述、成果比较和综合评价。结果表明：超临界CO_2瞬态流的关键因素是温度、压力、相态变化、协同作用；超临界CO_2管道安全停输时间可定义为从停输开始至管内任一点流体即将进入气液共存区的时间；CO_2发生相变首先造成流速突变，进而是压力的突变，产生水击现象，引起新的瞬变流动；站场放空系统的设计目标是在放空过程不出现冰堵、材料冷脆、噪声污染、放空系统激振等问题的前提下，放空时间尽量短；埋地管道泄漏规律涉及到土壤渗流场、温度场、浓度场等多场耦合问题。研究结果可为超临界CO_2管道流动安全保障提供参考。
Core technology of long-distance supercritical CO_2 pipeline transient transportation needs much progress.Relevant models and methods need to be validated and modified by industrial scale demonstration projects. Achievement review method is used to describe transient flow of CO_2 formed in conditions of shutdown, water hammer, leakage and blow-down during supercritical CO_2 pipeline transportation, with results comparison and comprehensive evaluation. The results show that key factors for CO_2 transient flow are temperature, pressure, phase transition and synergistic effect. Safe shutdown time of supercritical CO_2 pipeline is defined as the time from the beginning of shutdown to the time when any fluid in pipeline is about to enter gas-liquid coexistence zone. Phase transition of CO_2firstly causes sudden change of flow velocity and then pressure, resulting in water hammer and new transient flow.Design goal of blow-down system in station is to shorten blow-down time as much as possible without problems of ice blockage, cold brittleness of material, noise pollution or blow-down system excitation. Leakage law of buried pipeline involves coupling of soil seepage field, temperature field and concentration field. The research provides reference for safety assurance of supercritical CO_2 pipeline flow.

关键词(KeyWords)： CO_2管输;瞬变特性;停输再启动;水击;放空;泄漏;相变
pipeline transportation of CO_2;transient characteristics;shutdown and restart-up;water hammer;blow-down;leakage;phase transition

Abstract:

Keywords:

基金项目(Foundation): 中国石油大学（北京）克拉玛依校区科研启动基金项目（XQZX20230021）;; 新疆维吾尔自治区自然科学基金项目“二氧化碳管道停输再启动温压协同变化机理与安全控制理论研究”（2023D01A19）;; 新疆维吾尔自治区克拉玛依市创新环境建设计划（创新人才）项目“管输二氧化碳瞬变过程温压及相态协同变化机理和安全控制研究”（20232023hjcxrc0001）;; 中国石油新疆油田公司项目“超临界CO_2管道瞬态输送工艺技术研究”（XQHX20220064）;; 新疆维吾尔自治区“天池英才”引进计划项目

作者(Author): 李欣泽,袁亮,张超,王梓丞,邢晓凯,熊小琴,陈晓玲,尚妍,张文辉,陈潜
LI Xinze,YUAN Liang,ZHANG Chao,WANG Zicheng,XING Xiaokai,XIONG Xiaoqin,CHEN Xiaoling,SHANG Yan,ZHANG Wenhui,CHEN Qian

DOI: 10.19597/J.ISSN.1000-3754.202308069

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