污水泵站格栅间排风口布局及气流组织优化数值研究

Numerical Study on the Layout of Air Exhaust Vents and Airflow Organization Optimization in the Sewage Pumping Station

污水泵站格栅间恶臭气体的扩散严重影响周围居民的身体健康和人居环境.运用Fluent软件对格栅间不同送风口送风状态下室内的气流组织进行数值模拟,并考虑在格栅开口有污染物不断释放的条件下,分析送风系统对污染物扩散的影响,找寻一种用于格栅间排风系统的最优通风方式.研究表明,现有的送风方式均会引起格栅内气流组织的剧烈扰动,造成格栅内二次污染.在所有送风口共同作用下,室内污染物NH3的扩散强度大于H2S,送风系统对室内污染物的扩散产生更大的负面影响.与自由流出口相对的送风口送风方式对室内气流组织的干扰小,送风路径中污染物较少,对保持室内新风非常有利.

The spread of malodorous gas in the grid of the sewage pumping station has a serious effect on the health and living environment of the surrounding residents. The Fluent software is used to simulate the airflow in the air supply state of the air supply port between the grilles and consider the opening in the grille. Under the condition of continuous release of pollutants, the influence of the air supply system on the diffusion of pollutants is analyzed, and an optimal ventilation method for the exhaust system in the grille is found. The research shows that the existing air supply method causes the disturbance of the airflow in the grille, causing secondary pollution in the grille. Under the joint action of all air outlets, the diffusion intensity of indoor pollutant NH 3 is greater than H 2S. The air supply system has a greater negative impact on the diffusion of indoor pollutants. The air supply mode of the air outlet opposite to the free air outlet has less interference to the indoor airflow organization, and the less pollutants in the air supply path are very beneficial to keep the indoor fresh air.