化工学报 ›› 2016, Vol. 67 ›› Issue (12): 4994-5005.DOI: 10.11949/j.issn.0438-1157.20160550

• 流体力学与传递现象 • 上一篇    下一篇

汽油装罐油气扩散排放的实验测定及数值模拟

黄维秋1, 王兆利1, 纪虹1, 赵晨露2, 吕爱华1, 徐先阳1, 王翊红1   

  1. 1 江苏省油气储运技术重点实验室(常州大学), 江苏 常州 213016;
    2 上海河图工程股份有限公司, 上海 200000
  • 收稿日期:2016-04-26 修回日期:2016-09-19 出版日期:2016-12-05 发布日期:2016-12-05
  • 通讯作者: 黄维秋(1965-),男,教授。hwq213@cczu.edu.cn
  • 基金资助:

    国家自然科学基金项目(51574044);江苏省高校“青蓝工程”资助项目(SCZ1409700002);江苏省油气储运重点实验室项目(SCZ1211200004/004)。

Experimental determination and numerical simulation of vapor diffusion and emission in loading gasoline into tank

HUANG Weiqiu1, WANG Zhaoli1, JI Hong1, ZHAO Chenlu2, LÜ Aihua1, XU Xianyang1, WANG Yihong1   

  1. 1 Jiangsu Key Laboratory of Oil & Gas Storage and Transportation Technology(Changzhou University), Changzhou 213016, Jiangsu, China;
    2 Shanghai Hoto Engineering Inc., Shanghai 200000, China
  • Received:2016-04-26 Revised:2016-09-19 Online:2016-12-05 Published:2016-12-05
  • Supported by:

    supported by the National Natural Science Foundation of China(51574044), the Qing Lan Project of the Jiangsu Higher Education Institutions of China(SCZ1409700002) and the Major Research Plan of the Oil and Gas Storage and Transportation Laboratory of Jiangsu Province(SCZ1211200004/004).

摘要:

正确预测储油罐收油作业时罐内油气扩散排放规律对研究油品蒸发损耗及污染控制具有重要意义,因而两个关键参数(油罐排放气液比λ及损耗率η)被重点考虑。基于VOF模型、扩散传质模型和RNG k-ε湍流模型,对汽油喷溅式装油损耗进行数值模拟研究。分析比较了不同装油口高度、不同装油速度、不同油罐初始油气浓度条件下罐内的油气扩散规律,并建立汽油装罐蒸发损耗实验平台验证以上数值模拟,模拟值与实验值吻合良好。研究结果表明:装油口位置越高,汽油损耗率η越大,随装油速度增大,高装油口损耗率η最大约为0.34%,低装油口约为0.025%。增大油罐初始油气浓度,高装油口损耗率η最大约为0.44%,中装油口约为0.21%,低装油口约为0.043%。最后建议固定顶油罐大呼吸API损耗评估计算公式考虑装油速度及油罐初始油气浓度对蒸发损耗的影响,并尽量采用低装油口及清洗油罐装油。

关键词: 汽油, 蒸发, 扩散, 装油速度, 初始油气浓度, 数值模拟

Abstract:

It was of great significance correctly to predict the vapor diffusion and emission inside the tank for the researches of gasoline evaporation loss and vapor pollution control during the operation of loading gasoline into a tank. Then, two key parameters of the volumetric ratio λ of the displacement mixture gas of the vapor-air to the loaded gasoline and the qualitative ratio η of the evaporation loss to the loaded gasoline were mainly considered. Based on the models of volume of fluid(VOF), mass transfer and RNG k-ε turbulence, the evaporation loss was numerically simulated and experimentally investigated during the splash loading operation, and the oil vapor-air diffusion was analyzed and compared for the different loading exit heights, different loading velocity and the different initial vapor mass fraction. Meanwhile, an experimental system of evaporation loss in loading into a tank was built up to verify the numerical simulation, and the results of the numerical simulation were agreed well with the experimental data. The simulation results furthermore showed that the higher of the loading exit, the greater the qualitative ratio η of the evaporation loss to the loaded gasoline. The qualitative ratio of high exit was at around 0.34% and the qualitative ratio of low exit at around 0.025% by the increase of the loading velocity. The qualitative ratio η of high exit was at around of 0.44%, the qualitative ratio of mid exit at around 0.21% and the qualitative ratio of low exit at around 0.043% by increasing the initial vapor mass fraction. It was recommended that the effect of loading velocity and the initial vapor mass fraction should be considered in API loss formula by using a clean tank and low exit when loading and reducing loading speed appropriately before the loading pipe exit was submerged.

Key words: gasoline, evaporation, diffusion, loading velocity, initial vapor mass fraction, numerical simulation

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