EXPERIMENTAL STUDY ON RESTORATION EFFECT OF IN SITU THERMAL DESORPTION IN COKING CONTAMINATED SITES
-
摘要: 针对苯和多环芳烃污染的焦化类污染场地,开展原位燃气热脱附试验。创新性地将燃烧和抽提结合,通过加入小抽提管设计形式,将有机污染气体二次回燃的处置效果和能源消耗达到最佳状态,在尾气、尾水模块化设计中采用了"二次燃烧+活性炭吸附"和"油水分离+活性炭"的组合工艺,既强化了有机污染物去除效果,又降低了废气活性炭产生量。通过在100 m2的焦化类污染场地开展修复试验发现,热脱附过程4个升温阶段分界明显,修复周期约55 d,修复后检测苯并(a)芘和苯浓度小于GB 36600-2018《土壤环境质量建设用地土壤污染风险管控标准(试行)》中第Ⅱ类用地筛选值标准,尾气排放符合北京市DB 11/501-2017《大气污染物综合排放标准》。Abstract: In-situ gas thermal desorption experiments were conducted on coking sites contaminated by benzene and PAHs. In this paper, the disposal effect and energy consumption of the secondary combustion of organic pollutants reached an optimal state by innovatively combining combustion and extraction and means of the design form with small extraction tube. In the modular design of tail gas and tail water, the combined process of secondary combustion and adsorption of activated carbon, as well as oil-water separation and activated carbon was adopted, thereby enhancing the removal effect of organic pollutants, and reducing the production of waste gas and activated carbon. Through the remediation experiments conducted on a coking contaminated site of 100 square meters, the four heating periods in the thermal desorption process were well-defined, and the remediation duration was about 55 days. After remediation, the concentrations of benzo (a) pyrene and benzene were less than the standard values for screening the second type land according to Soil Environment Quality Risk Control Standard for Soil Contamination of Development Land (GB 36600-2018), and the exhaust emissions conformed to the Comprehensive Emission Standard of Air Pollutants of Beijing (DB 11/501-2017).
-
[1] 黎箭. 土壤污染修复技术综述[J]. 区域治理, 2019(28):72-74. [2] 许春娅. 工业污染场地土壤修复技术研究[J]. 资源节约与环保, 2019(3):99. [3] 王玉军, 刘存, 周东美,等. 客观地看待我国耕地土壤环境质量的现状:关于《全国土壤污染状况调查公报》中有关问题的讨论和建议[J]. 农业环境科学学报, 2014, 33(8):1465-1473. [4] 苏杨, 程红光. 解读土壤污染公报,量化结果需纠偏[J]. 环境经济, 2014(8):20. [5] 李书鹏, 焦文涛, 李鸿炫,等. 燃气热脱附技术修复有机污染场地研究与应用进展[J]. 环境工程学报, 2019,13(9):2037-2048. [6] 徐建, 林玉锁, 李群, 等. GTR技术对土壤加热效果及对污染物的去除效果[C]//中国环境科学学会2016年学术年会. 2016. [7] 刘惠. 污染土壤热脱附技术的应用与发展趋势[J]. 环境与可持续发展, 2019,44(4):144-148. [8] 康绍果, 李书鹏, 范云. 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. [9] 王锦淮. 原位热脱附技术在某有机污染场地修复中试应用[J]. 化学世界, 2018, 59(3):182-186. [10] 赵涛, 马刚平, 周宇,等. 多环芳烃类污染土壤热脱附修复技术应用研究[J]. 环境工程, 2017,35(11):183-186. [11] 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. [12] 王雄科. 挥发性有机物废气处理技术进展与前瞻[J]. 探索科学, 2019(4):89-90. [13] 张学良, 廖朋辉, 李群, 等. 复杂有机物污染地块原位热脱附修复技术的研究[J]. 土壤通报, 49(4):243-250. [14] 王奕文, 马福俊, 张倩, 等. 热脱附尾气处理技术研究进展[J]. 环境工程技术学报, 2017, 7(1):52-58. [15] 蒋村, 孟宪荣, 施维林,等. 氯苯污染土壤低温原位热脱附修复[J]. 环境工程学报, 2019, 13(7):1720-1726.
点击查看大图
计量
- 文章访问数: 255
- HTML全文浏览量: 30
- PDF下载量: 18
- 被引次数: 0