石油与天然气化工2024，Vol.53Issue(2)：119-125,7.DOI:10.3969/j.issn.1007-3426.2024.02.018
小型LNG站便携式取样技术研究
A portable sampling technology for small LNG stations
摘要
Abstract
Objective In order to the solve the problems that there is a lack of effective quality inspection sampling technology for small liquefied natural gas(LNG)stations,the existing portable LNG sampling technology lacks practical sampling applications,and the reliability needs further verification,a new type of portable LNG sampling device and technology,as well as a sampling reliability verification method are provided.Methods This study builds upon the theoretical framework of LNG phase diagram control.Through theoretical calculations,we have devised a portable LNG sampling apparatus featuring a vacuum-cooled probe and a vaporizer.This ensures that LNG remains in a supercooled state during the sampling process,subsequently undergoing complete vaporization upon entry into the vaporizer.Consequently,the representativeness of the LNG samples is guaranteed.Additionally,we have developed a point sampling device to facilitate comparative analyses with the portable LNG sampling method.By comparing the compositional analysis results of samples obtained from both methods,we have conducted a comprehensive study to verify the representativeness and reliability of the portable LNG sampling technique.Results Demonstration applications have been successfully carried out at LNG refueling stations and LNG plants.The outcomes of these practical tests have demonstrated remarkable consistency among the samples obtained through the use of the portable LNG sampling apparatus across eleven consecutive sampling attempts.The composition analysis results of the LNG liquid samples,obtained through two consecutive sampling attempts,have satisfied the reproducibility requirements outlined in GB/T 13610-2020 Analysis of natural gas composition-Gas chromatography.Furthermore,these results have aligned with the composition analysis findings of the samples obtained through the point sampling method.This indicates that the sampling process is genuinely representative.Conclusion The portable LNG sampling device and technique have achieved the expected sampling effect,and fulfilled the sampling requisites for quality inspection at small LNG stations.关键词
小型LNG站/液化天然气/取样/便携/质量检测Key words
small LNG stations/liquefied natural gas/sampling/portability/quality inspection引用本文复制引用
朱华东,张镨,宋柯静,谢羽..小型LNG站便携式取样技术研究[J].石油与天然气化工,2024,53(2):119-125,7.基金项目
中国石油西南油气田公司科学研究与技术开发项目"便携式LNG取样系统应用研究"(20210308-06) （20210308-06）
