Experimental Study of Discharge and Dispersion of Supercritical CO2, Released Accidentally From an Industrial-scale Pipeline

摘要：

　　A large-scale pipeline set-up with a total length of 258 m and an internal diameter of 233 mm was constructed to perform CO2 release experiments.A dual-disc blasting device was designed to control the CO2 release precisely.The pressures and temperatures in the pipeline were measured, together with the CO2 concentrations and temperatures within the downstream dispersion region.A total of five tests were conducted, with various discharge diameters and different purities of supercritical CO2.Results indicate that at different locations in the pipeline, fluid pressures decrease synchronously, whereas the fluid temperatures decrease after release.Bottom fluid temperature is lower than top fluid values in the same location.CO2 changes from the supercritical phase to liquid-vapour phases, and then to a single-vapour phase in the pipeline.However, when flowing through the release orifice, the CO2 phase is liquid first and then vapour during the release process.The CO2 concentration distributions appear as an elliptical shape in the dispersion region.The large discharge diameter gives large CO2 gas concentrations.However, the effect of impurity on concentration is complicated.

关键词： carbon dioxide discharge dispersion industrial-scale pipeline

作者: YAN Xingqing GUO Xiaolu YU Jianliang ZHANG Yongchun CHEN Shaoyun Haroun MAHGEREFTEH Sergey MARTYNOVC

作者单位: School of Chemical Machinery and Safety, Dalian University of Technology, Dalian116024, Liaoning, Ch School of Chemical Engineering, Dalian University of Technology, Dalianl16024, Liaoning, China Department of Chemical Engineering, University College London, London WC 1E 7JE, UK

会议类型: 国际会议

会议名称: The 2016 International Symposium on Safety Science and Technology(2016安全科学与技术国际会议)

会议地点: 昆明

会议语种:英文

页码: 245-251

在线出版日期: 2016-10-17（万方平台首次上网日期，不代表论文的发表时间）