| 基于COMSOL热强化SVE技术的污染场地数值模拟 |
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| 引用本文： | 陈永俊,孙如华,王翔,徐峰.基于COMSOL热强化SVE技术的污染场地数值模拟[J].环境工程,2020,38(3):174-179. |
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| 作者姓名： | 陈永俊 孙如华 王翔 徐峰 |
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| 作者单位： | 1. 国家山区公路工程技术研究中心, 重庆 400000; |
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| 摘 要： | 利用COMSOL仿真软件分别模拟了尺度为2 m×2 m×1 m的SVE技术热反应单元，在地表以下1 m深度的温度场变化情况和地表以下0.5 m深度平面中的污染物迁移状态。对该尺度模型的温度场模拟发现，当热源功率在80 kW/m3时，加热至70 h，场地最高温和最低温分别达到2500，500 K的稳定值，随后在此温度下增加速度场，抽气钻孔负压达到101.325 kPa时，在6 min达到迁移速度峰值0.3 m/s，6~10 min出现最大降幅，10 min后基本保持稳定。表征污染物在10 min时已实现大部分去除，随后产生常见的拖尾效应。
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| 关 键 词： | COMSOL SVE 温度场 速度场 污染物迁移 |
| 收稿时间： | 2019-07-19 |
NUMERICAL SIMULATION OF POLLUTED SITES BASED ON COMSOL THERMAL ENHANCEMED SVE TECHNOLOGY |
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| CHEN Yong-jun,SUN Ru-hua,WANG Xiang,XU Feng.NUMERICAL SIMULATION OF POLLUTED SITES BASED ON COMSOL THERMAL ENHANCEMED SVE TECHNOLOGY[J].Environmental Engineering,2020,38(3):174-179. |
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| Authors: | CHEN Yong-jun SUN Ru-hua WANG Xiang XU Feng |
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| Affiliation: | 1. National Engineering and Research Center for Mountainous Highways, Chongqing 400000, China;2. College of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221000, China;3. College of Geosciences, Chengdu University of Technology, Chengdu 610000, China |
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| Abstract: | In this paper, COMSOL simulation software was used to simulate the thermal response unit of SVE technology with a scale of 2 m×2 m×1 m, for the temperature field variation of 1 m depth below the surface and the migration state of pollutants in the plane with a depth of 0.5 m below the surface. The temperature field simulation of the scale model showed that when the heat source power was 80 kW/m3 with a duration of 70 h, the highest and lowest temperature of the site reached the stable values of 2500 K and 500 K, respectively. And then velocity field was applied at this temperature, when the negative pressure of pumping hole reached 101.325 kPa, and the peak migration velocity reached 0.3 m/s at 6 min. Migration velocity showed a most obvious decline in 6~10 min and got basically stable after 10 min. Therefore, most of the symbolizing pollutants had been removed in 10 min, followed by the trailing effect that was commonly seen in actual projects. |
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