埋地天然气管道泄漏量计算与分析
发布时间：2019-06-04 20:50
【摘要】：为计算埋地天然气管道泄漏量,获得合理的埋地管道泄漏计算模型与埋地管道土中天然气吸收量,通过分析燃气管道泄漏的模型划分标准,建立等温与等熵模型计算小孔泄漏量。结合天然气管线泄漏强度的实验数据进行对比分析,得出了等熵与等温模型分别为实际小孔泄漏量的上下限;利用菲克定律推导埋地管道泄漏扩散浓度方程,并分析扩散范围,结合工程实例对泄漏量进行计算分析。研究结果表明,小孔泄漏孔径越小,处于爆炸浓度极限的时间越长,危险性越高。根据埋地管道周围土中各点天然气浓度分布规律,提出了土壤吸收量计算方法,改进了地面蒸气云泄漏质量计算方法,结合工程实例定量地给出了土壤的天然气吸收率。
[Abstract]:In order to calculate the leakage of buried natural gas pipeline, a reasonable calculation model of buried pipeline leakage and the amount of natural gas absorption in buried pipeline soil are obtained, and the classification standard of gas pipeline leakage model is analyzed. The Isothermal and Isentropy models were established to calculate the leakage of small pores. Combined with the experimental data of leakage intensity of natural gas pipeline, it is concluded that the Isentropy and isotherm models are the upper and lower limits of the actual leakage of small holes, respectively. The equation of leakage diffusion concentration of buried pipeline is derived by using Fick's law, and the diffusion range is analyzed, and the leakage quantity is calculated and analyzed with an engineering example. The results show that the smaller the leakage aperture of the hole is, the longer the time is at the explosion concentration limit, and the higher the risk is. According to the distribution law of natural gas concentration in the soil around the buried pipeline, the calculation method of soil absorption is put forward, the calculation method of surface vapor cloud leakage quality is improved, and the natural gas absorption rate of soil is quantitatively given with an engineering example.
【作者单位】： 解放军理工大学爆炸冲击防灾减灾国家重点实验室;
【基金】：国家自然科学基金资助项目(51478465,51308544,51508567) 江苏省自然科学基金资助项目(BK20151448)
【分类号】：TE973
[Abstract]:In order to calculate the leakage of buried natural gas pipeline, a reasonable calculation model of buried pipeline leakage and the amount of natural gas absorption in buried pipeline soil are obtained, and the classification standard of gas pipeline leakage model is analyzed. The Isothermal and Isentropy models were established to calculate the leakage of small pores. Combined with the experimental data of leakage intensity of natural gas pipeline, it is concluded that the Isentropy and isotherm models are the upper and lower limits of the actual leakage of small holes, respectively. The equation of leakage diffusion concentration of buried pipeline is derived by using Fick's law, and the diffusion range is analyzed, and the leakage quantity is calculated and analyzed with an engineering example. The results show that the smaller the leakage aperture of the hole is, the longer the time is at the explosion concentration limit, and the higher the risk is. According to the distribution law of natural gas concentration in the soil around the buried pipeline, the calculation method of soil absorption is put forward, the calculation method of surface vapor cloud leakage quality is improved, and the natural gas absorption rate of soil is quantitatively given with an engineering example.
【作者单位】： 解放军理工大学爆炸冲击防灾减灾国家重点实验室;
【基金】：国家自然科学基金资助项目(51478465,51308544,51508567) 江苏省自然科学基金资助项目(BK20151448)
【分类号】：TE973
【参考文献】
相关期刊论文 前7条
1 谢昱姝;汪彤;吕良海;白永强;宋冰雪;张晓峰;;城市管道天然气在土壤中扩散行为全尺度实验[J];天然气工业;2015年08期
2 张鹏;程淑娟;;埋地天然气管道小微孔泄漏规律研究[J];中国安全科学学报;2014年02期
3 冯云飞;吴明;闫明龙;陈杨;;燃气管道泄漏模型的研究进展[J];当代化工;2011年12期
4 冯文兴;王兆芹;程五一;;高压输气管道小孔与大孔泄漏模型的比较分析[J];安全与环境工程;2009年04期
5 唐保金;田贯三;张增刚;薛海强;;埋地燃气管道泄漏扩散模型[J];煤气与热力;2009年05期
6 彭世尼;周廷鹤;;燃气泄漏与扩散模型的探讨[J];煤气与热力;2008年11期
7 杨昭;张甫仁;赖建波;;非等温长输管线稳态泄漏计算模型[J];天津大学学报;2005年12期
相关硕士学位论文 前2条
1 韩光洁;埋地燃气管道泄漏量计算及扩散规律研究[D];重庆大学;2014年
2 杨小刚;城市燃气管线泄漏强度实验测定及扩散浓度模拟[D];哈尔滨工业大学;2009年
【共引文献】
相关期刊论文 前10条
1 董靖宇;王岳;范庆宇;王U，
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