水循环对垃圾土温度影响的室内试验及验证研究
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摘要
垃圾土在填埋场中的降解是一个复杂的过程,在此过程中不仅会产生填埋气和渗滤液,而且还会产生热量这一伴生产物,垃圾土产生的热量会使垃圾土自身温度不断升高,而过高的温度对填埋气、衬垫系统以及垃圾填埋场的安全性都会产生影响.通过水循环对垃圾土温度及降解产气影响的室内试验,监测垃圾土中温度变化,根据试验的产气时间过程线和垃圾土降解反应方程式,拟合出产气方程的参数,建立了降解产热源项和垃圾土温度变化的轴对称模型,推求模型解答.由模型计算结果与试验结果比较分析,建立的产热源项和计算模型能较好地模拟水循环对垃圾土温度的影响过程.
In this paper,the degradation of waste in landfills is a complex process in which not only landfill gas and leachate are produced,but also heat is produced as a companion product. The heat generated by the waste increases the temperature of the waste itself,and the excessive temperatures have an impact on landfill gas,liner systems,and the safety of the landfill. We find the laboratory test gets the influence of water cycle on the temperature of waste,the degradation of gas production,and monitors the temperature changes in the waste. According to the experimental gas production time of process line and the waste degradation reaction equation,the parameters of the gas production equation are fitted. The axisymmetric model of the heat source degradation and the waste soil temperature change is established,and the model is solved. From the comparison between the model calculation results and the test results,the established heat source and calculation model can better simulate the influence of water cycle on the temperature of the waste.
In this paper,the degradation of waste in landfills is a complex process in which not only landfill gas and leachate are produced,but also heat is produced as a companion product. The heat generated by the waste increases the temperature of the waste itself,and the excessive temperatures have an impact on landfill gas,liner systems,and the safety of the landfill. We find the laboratory test gets the influence of water cycle on the temperature of waste,the degradation of gas production,and monitors the temperature changes in the waste. According to the experimental gas production time of process line and the waste degradation reaction equation,the parameters of the gas production equation are fitted. The axisymmetric model of the heat source degradation and the waste soil temperature change is established,and the model is solved. From the comparison between the model calculation results and the test results,the established heat source and calculation model can better simulate the influence of water cycle on the temperature of the waste.
引文
[1]HANSON J L,YE?ILLER N,ONNEN M T,et al.Development of numerical model for predicting heat generation and temperatures in MSW landfills[J].Waste Management,2013,33(10):1993-2000.
[2]REES J F.Optimisation of methane production and refuse decomposition in landfills by temperature control[J].Journal of Chemical Technology and Biotechnology,1980,30(1):458-465.
[3]ATTAL A,AKUNNA J,CAMACHO P,et al.Anaerobic degradation of municipal wastes in landfill[J].Water Science and Technology,1992,25(7):243-253.
[4]YESILLER N,HANSON J L,LIU W L.Heat generation in municipal solid waste landfills[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(11):1330-1344.
[5]YESILLER N,HANSON J L,YEE E H.Waste heat generation:a comprehensive review[J].Waste Management,2015,42:166-179.
[6]ROWE R K.Long-term performance of contaminant barrier systems[J].Geotechnique,2005,55(9):631-678.
[7]LAMOTHE D,EDGERS L.The effects of environmental parameters on the laboratory compression of refuse[C]//International madsion waste conference:municipal and industrial waste,Wisconsin-Madison.Madison,USA,1994:592-604.
[8]CHEN Y,KE H,FREDLUND D G,et al.Secondary compression of municipal solid wastes and a compression model for predicting settlement of municipal solid waste landfills[J].Journal of Geotechnical and Geoenvironmental Engineering,2010,136(5):706-717.
[9]CHEN R H,CHEN K S,LIU C N.Study of the mechanical compression behavior of municipal solid waste by temperaturecontrolled compression tests[J].Environmental Earth Sciences,2010,61(8):1677-1690.
[10]ROWE R K.Long-term performance of contaminant barrier systems[J].Geotechnique,2005,55(9):631-678.
[11]ROWE R K.Advances and remaining challenges for geosynthetics in geoenvironmental engineering applications[J].Soils and Rocks,2007,30(1):3-30.
[12]BARLAZ M A,MILKE M W,HAM R K.Gas production parameters in sanitary landfill simulators[J].Waste Management and Research,1987,5(1):27-39.
[13]罗锋,陈万志,李小鹏,等.三种垃圾填埋场单元模拟器对废物降解的对比试验[J].中国环境科学,2004,24(4):474-479.
[14]赵燕茹,谢强,张永兴,等.城市生活垃圾降解-压缩特性试验研究[J].岩土工程学报,2014,36(10):1863-1871.
[15]HAO Z,SUN M,DUCOSTE J,et al.Heat generation and accumulation in municipal solid waste landfills[J].Environmental Science and Technology,2017,51(21):12434-12442.
[16]邰俊.垃圾土有机成分降解产热规律试验研究[D].南京:河海大学,2018.
[17]杨世铭,陶文铨.传热学[M].4版.北京:高等教育出版社,2006.
[18]钱正亚.垃圾土导热特性试验研究[D].南京:河海大学,2017.
[2]REES J F.Optimisation of methane production and refuse decomposition in landfills by temperature control[J].Journal of Chemical Technology and Biotechnology,1980,30(1):458-465.
[3]ATTAL A,AKUNNA J,CAMACHO P,et al.Anaerobic degradation of municipal wastes in landfill[J].Water Science and Technology,1992,25(7):243-253.
[4]YESILLER N,HANSON J L,LIU W L.Heat generation in municipal solid waste landfills[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(11):1330-1344.
[5]YESILLER N,HANSON J L,YEE E H.Waste heat generation:a comprehensive review[J].Waste Management,2015,42:166-179.
[6]ROWE R K.Long-term performance of contaminant barrier systems[J].Geotechnique,2005,55(9):631-678.
[7]LAMOTHE D,EDGERS L.The effects of environmental parameters on the laboratory compression of refuse[C]//International madsion waste conference:municipal and industrial waste,Wisconsin-Madison.Madison,USA,1994:592-604.
[8]CHEN Y,KE H,FREDLUND D G,et al.Secondary compression of municipal solid wastes and a compression model for predicting settlement of municipal solid waste landfills[J].Journal of Geotechnical and Geoenvironmental Engineering,2010,136(5):706-717.
[9]CHEN R H,CHEN K S,LIU C N.Study of the mechanical compression behavior of municipal solid waste by temperaturecontrolled compression tests[J].Environmental Earth Sciences,2010,61(8):1677-1690.
[10]ROWE R K.Long-term performance of contaminant barrier systems[J].Geotechnique,2005,55(9):631-678.
[11]ROWE R K.Advances and remaining challenges for geosynthetics in geoenvironmental engineering applications[J].Soils and Rocks,2007,30(1):3-30.
[12]BARLAZ M A,MILKE M W,HAM R K.Gas production parameters in sanitary landfill simulators[J].Waste Management and Research,1987,5(1):27-39.
[13]罗锋,陈万志,李小鹏,等.三种垃圾填埋场单元模拟器对废物降解的对比试验[J].中国环境科学,2004,24(4):474-479.
[14]赵燕茹,谢强,张永兴,等.城市生活垃圾降解-压缩特性试验研究[J].岩土工程学报,2014,36(10):1863-1871.
[15]HAO Z,SUN M,DUCOSTE J,et al.Heat generation and accumulation in municipal solid waste landfills[J].Environmental Science and Technology,2017,51(21):12434-12442.
[16]邰俊.垃圾土有机成分降解产热规律试验研究[D].南京:河海大学,2018.
[17]杨世铭,陶文铨.传热学[M].4版.北京:高等教育出版社,2006.
[18]钱正亚.垃圾土导热特性试验研究[D].南京:河海大学,2017.