摘要
为了确定有利于超临界CO2管道输送的参数范围，保证安全输送，基于超临界CO2流体作为管输介质与天然气和原油的不同之处，分析了超临界CO2管道输送技术的特殊性，进而通过软件模拟计算，分别研究了不同入口温度、管输流量、总传热系数下管输压力、温度、密度、黏度与输送距离的关系，得到了特定条件下的有效输送距离，不同管输流量对压温及物性的影响规律。结果表明：在研究条件范围内，输送距离超过100km后，CO2由超临界态变为密相，若要保持超临界态输送，需要在每100km范围内设置加热站；管输流量介于200-250t／h之间较理想；总传热系数介于0．84～1．3W／（m2 ℃）之间为宜。该研究属于超临界CO2管道输送基础研究，对于我国形成完整的超临界CO2管道输送系统具有参考价值。（图3，表3，参10）
To determine the range of parameters conducive to supercritical COz pipeline transportation and ensure the transportation safety, the particularity of supercritical CO2 pipeline transportation technology is analyzed based on the differences between supercritical CO2 fluid and natural gas and crude oil. Furthermore, a software simulation system is developed to study the relationship between pipeline pressure, temperature, density, viscosity and transportation distance under different inlet temperature, pipeline flowrate and overall heat transfer coefficient. Through simulation calculation, effective transportation distance and the influence of different pipeline flowrate on physical properties, pressure and temperature under certain conditions have been figured out. The results show that when the transportation distance exceeds 100 kin, the phase of CO2 will shift from supercritical state to dense state under the research conditions. To maintain the supercritical state, heating stations at less than 100 km interval should be set up; the ideal pipeline flowrate is between 200 t/hr and 250 t/hr; the appropriate overall heat transfer coefficient is between 0.84 W/（m2.℃） and 1.3 W/（m2.℃）. This research is a basic research on supercritical CO2 pipeline transportation, and can provide references for the construction of a complete system of supercritical CO2 pipeline transportation. （3 Figures, 3 Tables, 10 References）
出处
《油气储运》
CAS
2014年第4期359-363,共5页
Oil & Gas Storage and Transportation
基金
国家科技支撑计划项目"大规模燃煤电厂烟气CO2捕集纯化
输送及安全控制技术研究"
2012BAC24B01
国家自然科学基金项目"含杂质超临界二氧化碳管道输送安全控制关键技术研究
51374231
中央高校基本科研业务费专项资金资助项目"天然气及二氧化碳安全高效输送关键技术研究"
13CX05012A
关键词
超临界
CO2
管道输送
特殊性
敏感性
supercritical, CO2, pipeline transportation, particularity, sensitivity
