基于Calpuff模型的生活垃圾填埋场恶臭气体影响范围评估

发布时间：2018-05-31 13:34

本文选题：恶臭 + 氨气　；参考：《东南大学学报(自然科学版)》2016年S1期

【摘要】：为了研究以氨气对代表的恶臭物质扩散对周边环境造成的影响,利用Calpuff模型评估了苏州某山谷型填埋场作业面上的气体释放,分析了大气温度、气压、风速和气体释放通量等参数的变化对下风向、距离填埋场1.7 km位置10 m高度处空气中氨气浓度的影响;计算了氨气在不同风速和不同单位时间释放质量下的最大影响距离,并对单位时间释放质量及最大影响距离关系进行了拟合;依据现有国家标准,对拟合公式与现有国标计算公式进行了比较.结果表明:风速与气体释放通量是主要的扩散影响因素;国标的计算公式中以5年平均风速作为主要依据选取参数存在缺陷,基于场地实际条件得到的拟合公式可以对国标公式计算结果进行修正,以保证填埋场周边群众避免受到恶臭问题的干扰.
[Abstract]:In order to study the effect of ammonia gas on the diffusion of odorous substances on the surrounding environment, the Calpuff model was used to evaluate the gas release from the surface of a valley landfill in Suzhou, and the atmospheric temperature and pressure were analyzed. The influence of the parameters such as wind speed and gas flux on the downwind direction and the concentration of ammonia gas in the air at a height of 10 m about 1.7 km from the landfill site was studied, and the maximum influence distance of ammonia gas under different wind speed and mass per unit time was calculated. The relationship between the mass released per unit time and the maximum influence distance is fitted, and the fitting formula is compared with the existing national standard formula according to the existing national standards. The results show that the wind speed and the gas flux are the main factors affecting the diffusion, and the 5-year mean wind speed is the main parameter in the calculation formula of the national standard. The fitting formula based on the actual conditions of the site can modify the calculation results of the national standard formula, so as to ensure that the people around the landfill can avoid being disturbed by the stench problem.
【作者单位】：浙江大学建筑工程学院;
【基金】：国家重点基础研究发展计划(973计划)资助项目(2012CB719806) 国家自然科学基金资助项目(51278452,41672288,51478427,51008274) 中央高校基本科研业务费专项资金资助项目(2014QNA4019) 浙江省公益性技术应用研究计划资助项目(2015C31005)
【分类号】：X512;X799.3

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