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.
引文
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