垃圾焚烧厂烟废气分布特征研究

Study on the Distribution Characteristic of Flue Gas Released From Solid Waste Incineration Plant

目的研究垃圾焚烧厂排放烟气对周边居民区的影响,为城市规划设计和应对环境污染提供参考依据.方法以深圳市某区一垃圾焚烧厂及周边区域为研究区域,该厂排放的烟废气为研究对象,根据收集该区域一年气象数据及地形状况,确定该区域的主导风向和实际地貌,利用CFD数值模拟了垃圾焚烧厂烟废气的扩散行为,并对烟废气的分布特征进行分析.结果在垃圾焚烧厂东北方向即下风向1 300 m处居民区受污染程度最为严重,周边半径为5 km范围内空气环境均有不同程度污染.结论该垃圾焚烧厂下风向居民区受烟气污染的影响程度明显大于同等距离其他方向,尤其是SO_2、NO_x随气流运动的扩散程度更加显著,且各污染物浓度均与据垃圾焚烧厂距离呈负相关性.

This paper was proposed to study the influence of flue gas emission of solid waste incin- eration plant on the surrounding residents in a district of Shenzhen to provide the reference for ur- ban planning and preventing environmental pollution. Based on the meteorological and landform data of the research area, the flue gas diffusion process was simulated through the method of CFD （ Computational Fluid Dynamics） to analyzed the distribution characteristic. The result showed that the most seriously polluted area was about 1 300 m on the east-north direction from the centre of the solid waste incineration plant, and nearly all of the area within the local radius 5 km was pollu- ted. The conclusion was that the polluted degree of down wind direction was significantly greater than other areas with the same distance, for the diffusion of SO2, NO2 were significantly effected with the air movement, and the pollutant concentrations were associated with the distances from solid waste incineration plant according to a negative correlation.