单根加热管原位加热土壤过程中温度变化规律
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摘要
原位热传导技术在有机污染场地修复中的应用逐年增加,但国内对加热半径、升温和冷却速率等关键参数的研究仍处于起步阶段。结合土壤理化性质,研究单根加热管升温和降温过程中周围土壤的温度变化情况。结果表明:经过813 h的加热升温过程,相隔25 cm不同位置的4个温度监测井的平均温度分别为166.3,89.3,68.7,47.8℃,总耗电量为1438.7 kW·h。随后经过145 h的持续冷却,4个监测井的平均温度基本持平。监测井温度变化规律可为污染场地的原位热修复工程提供技术及工艺参数参考。
In-situ thermal conductive technology has been applied increasingly in remediation process of organic contaminated soil, however, the study of key parameters, such as heating diameter, heating and cooling rate are still in its infancy. Combining the physical and chemical properties of the soil, this paper researched the temperature variation of surrounding soil during heating and cooling process with single heating tube. The experiment results showed that: after 813 h of heating process, the average temperatures of four monitoring wells were 166.3, 89.3, 68.7, 47.8 ℃ respectively, and the total power consumption was 1438.7 kW·h. After continuous cooling of 145 h, the average temperatures of the four monitoring wells were basically equal. The temperature variation law of the monitoring wells provided reference of technical and technological parameters for in-situ thermal remediation projects of contaminated sites.
In-situ thermal conductive technology has been applied increasingly in remediation process of organic contaminated soil, however, the study of key parameters, such as heating diameter, heating and cooling rate are still in its infancy. Combining the physical and chemical properties of the soil, this paper researched the temperature variation of surrounding soil during heating and cooling process with single heating tube. The experiment results showed that: after 813 h of heating process, the average temperatures of four monitoring wells were 166.3, 89.3, 68.7, 47.8 ℃ respectively, and the total power consumption was 1438.7 kW·h. After continuous cooling of 145 h, the average temperatures of the four monitoring wells were basically equal. The temperature variation law of the monitoring wells provided reference of technical and technological parameters for in-situ thermal remediation projects of contaminated sites.
引文
[1] 鹿守敢, 孟慧芳. 某化工企业搬迁遗留场地环境调查与健康风险评估[J]. 环境科技, 2017(6): 40-45.
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[9] 康绍果, 李书鹏, 范云, 等. 污染地块原位加热处理技术研究现状与发展趋势[J]. 化工进展, 2017, 36(7):2621-2631.
[10] Mihaila M, Hotnog C, Theodor V, et al. In situ thermal treatment (ISTT) for source zone remediation of soil and groundwater[J]. British Medical Journal, 2013, 31(31):482-484.
[11] Hegele P R, Mumford K G. Gas production and transport during bench-scale electrical resistance heating of water and trichloroethene[J]. Journal of Contaminant Hydrology, 2014, 165:24-36.
[12] 刘凯, 张瑞环, 王世杰. 污染地块修复原位热脱附技术的研究及应用进展[J]. 中国氯碱, 2017(12):31-37.
[13] 孙常龙, 王岳, 邵慧龙, 等. 原位电法开发油页岩的温度场数值分析[J]. 辽宁石油化工大学学报, 2015, 35(4): 40-43.
[14] 薛晋霞, 刘中华. 油页岩电加热法原位干馏温度场分布的数值仿真[J]. 地下空间与工程学报, 2015, 11(3): 669-672.
[15] Baston, Daniel P Kueper, Bernard H. Thermal conductive heating in fractured bedrock: screening calculations to assess the effect of groundwater influx[J]. Advances in Water Resources 2009, 32(2): 231-238.
[2] 展漫军, 赵鹏飞, 赵忠伟, 等. 搬迁化工企业遗留场地氯苯污染迁移模拟与不确定分析[J]. 环境污染与防治, 2014, 36(6): 111.
[3] 黄擎, 李发生, 桂明英. 石油污染场地土壤中多环芳烃的赋存和分布[J]. 哈尔滨工业大学学报, 2009, 41(10): 142-145.
[4] 刘五星, 骆永明, 王殿玺. 石油污染场地土壤修复技术及工程化应用[J]. 环境监测管理与技术, 2011, 23 (3): 47-51.
[5] Kingston, Jennifer L Triplett, et al. State-of-the-practice review of in situ thermal technologies[J]. Groundwater Monitoring and Remediation, 2010, 30(4): 64-72.
[6] Kingston, Jennifer L Triplett, Johnson, et al. In situ thermal treatment of chlorinated solvent source zones[J]. Chlorinated Solvent Source Zone Remediation, 2014, 7: 509-557.
[7] 刘昊, 张峰, 马烈. 有机污染场地原位热修复:技术与应用[J]. 工程建设与设计, 2017(16): 93-98.
[8] Kueper, Bernard H Shepard, Alicia J Stroo, et al. Future directions and research needs for source zone remediation[J]. Chlorinated Solvent Source Zone Remediation, 2014, 7: 653-668.
[9] 康绍果, 李书鹏, 范云, 等. 污染地块原位加热处理技术研究现状与发展趋势[J]. 化工进展, 2017, 36(7):2621-2631.
[10] Mihaila M, Hotnog C, Theodor V, et al. In situ thermal treatment (ISTT) for source zone remediation of soil and groundwater[J]. British Medical Journal, 2013, 31(31):482-484.
[11] Hegele P R, Mumford K G. Gas production and transport during bench-scale electrical resistance heating of water and trichloroethene[J]. Journal of Contaminant Hydrology, 2014, 165:24-36.
[12] 刘凯, 张瑞环, 王世杰. 污染地块修复原位热脱附技术的研究及应用进展[J]. 中国氯碱, 2017(12):31-37.
[13] 孙常龙, 王岳, 邵慧龙, 等. 原位电法开发油页岩的温度场数值分析[J]. 辽宁石油化工大学学报, 2015, 35(4): 40-43.
[14] 薛晋霞, 刘中华. 油页岩电加热法原位干馏温度场分布的数值仿真[J]. 地下空间与工程学报, 2015, 11(3): 669-672.
[15] Baston, Daniel P Kueper, Bernard H. Thermal conductive heating in fractured bedrock: screening calculations to assess the effect of groundwater influx[J]. Advances in Water Resources 2009, 32(2): 231-238.
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