[1] Wang Yajun, Dong Wantao, Chen Tianjing, et al. In-situ remediation of deep petroleum-contaminated soil injection [J]. Journal of Southeast University (English Edition), 2021, 37 (4): 394-400. [doi:10.3969/j.issn.1003-7985.2021.04.008]

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In-situ remediation of deep petroleum-contaminated soil injection()

深层石油类污染土壤注射原位修复

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

37

Issue:

2021 4

Page:

394-400

Research Field:

Environmental Science and Engineering

Publishing date:

2021-12-20

Info

Title:

In-situ remediation of deep petroleum-contaminated soil injection

深层石油类污染土壤注射原位修复

Author(s):

Wang Yajun¹;  2;  Dong Wantao¹;  Chen Tianjing¹;  Li Li³Zhang Yurong¹;  Xu Shenghui¹;  Fu Dafang¹;  2

¹School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730000, China
²SEU-Monash Joint Research Center for Future Cities, Suzhou 215123, China
³China Railway Research Institute Co., Ltd. Chengdu Branch, Chengdu 610000, China

王亚军¹;  2;  董万涛¹;  陈甜婧¹;  李丽³;  张玉蓉¹;  许生辉¹;  傅大放¹;  2

¹兰州理工大学土木工程学院, 兰州 730000; ²东南大学-莫纳什大学未来城市研究院, 苏州 215123; ³中铁科学研究院有限公司成都分公司, 成都 610000

Keywords:

in-situ chemical oxidation;  high-pressure jet;  total petroleum hydrocarbons;  remediation of contaminated soil;  computational fluid dynamics(CFD)numerical simulation

原位化学氧化;  高压旋喷;  总石油烃;  污染土壤修复;  CFD数值模拟

PACS:

X53

DOI:

10.3969/j.issn.1003-7985.2021.04.008

Abstract:

A computational fluid dynamics(CFD)numerical simulation and field experiment were used to investigate optimal operating parameters of high-pressure jet grouting equipment and clarify the boundary law of the injection area in the remediation process. The response surface optimization design results show that the optimal injection pressure is 30 MPa, rotation speed is 23 r/min, commission speed is 30 cm/min, and the optimal injection diameter is 147.3 cm. Based on the CFD numerical simulation, the ratio of the injection core, turbulent zone, and seepage zone is approximately 1∶4∶2. The distribution law of jet core, turbulence zone and seepage zone at different cross-sections under 30 MPa operating conditions is as follows: The jet core radius is approximately 100 mm, the turbulence zone is mainly distributed at 100 to 500 mm, the seepage zone is mainly distributed at 500 to 700 mm, the seepage zone could be completed within 2 h, and the proportion of the three boundary zones in the injection zone is similar to that of the numerical simulation. This study provides theoretical parameters and practical reference for the remediation of deep pollution via in-situ chemical oxidation in the Loess Plateau soil environment.

采用CFD数值模拟和现场实验方法, 考察高压旋喷设备最佳运行工况参数, 探讨修复过程中注射区域分界规律.通过响应面优化设计得出高压旋喷运行最佳注射压力为30 MPa, 旋转速度为23 r/min, 提升速度为30 cm/min, 最佳注射直径为147.3 cm.通过CFD数值模拟出注射区域分界的喷射核、湍流区和渗流区比例约为1∶4∶2.在30 MPa运行工况下不同断面喷射核、湍流区和渗流区的分布规律为:喷射核半径在100 mm左右, 湍流区主要分布在100~500 mm处, 渗流区主要分布在500~700 mm, 且渗流区域可在2 h内完成.通过现场实验得到的注射区域3个分界区比例与数值模拟结果类似.该研究为黄土高原土壤环境下原位化学氧化修复深层污染提供了理论参数和实践参考.

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Memo

Memo:

Biography: Wang Yajun(1979—), male, doctor, associate professor, wyj79626@163.com.
Foundation items: The National Natural Science Foundation of China(No.41967043, 52160003), the Natural Science Foundation of Gansu Province(No.20JR5RA461), the Key Project of China Railway Southwest Research Institute Co., Ltd.(No.2018-KJ003-Z003-XB), the Industrial Support Program of the Higher Education of Gansu Province(No.2020C-40).
Citation: Wang Yajun, Dong Wantao, Chen Tianjing, et al. In-situ remediation of deep petroleum-contaminated soil injection[J].Journal of Southeast University(English Edition), 2021, 37(4):394-400.DOI:10.3969/j.issn.1003-7985.2021.04.008.

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