垃圾处理厂卸料坑吸风口位置及负压值对臭气逸散影响分析

Analysis of Odour Collection in Waste Unloading Pit when the Position and Negative Pressure of Air Outlet are Different Respectively in Municipal Solid Waste Treatment Plant

以垃圾处理站卸料坑为分析模型,采用CFD模拟方法分析卸料坑内吸风口负压值对卸料门处臭气逸散的影响。分析得出,卸料门处的负压值与吸风口负压值成线性关系,卸料门处的风速与吸风口负压值成二次函数关系。卸料门处的臭气浓度值与吸风口负压成幂函数关系。可以看出,侧吸风情况下,卸料门处的平均负压、风速值最大,但H_(2)S浓度却不是最小。工程设计中,在保证臭气不外逸的前提下,可通过优化臭气收集吸风口布置,降低吸风量,达到节能高效目的。

Through establishing physical models and using CFD method to analyze effects of odor collection in the door area,when negative pressure values of air outlet in the pit differs at different position.Correlation between pressure values of air outlet and average pressure values in door area are linear.Pressure values of air outlet and average velocities in door area present quadratic function relations.Pressure values of air outlet and average H_(2)S concentrations in door area present power function relations.Pressure values and average speed in door area are highest when outlet is on the sidewall,but the concentrations,which indicate effect of deodorization directly,are not the lowest.Illustrating that position of outlet affects the capture of odor in the pit,whereas it is an efficient way to optimizing odor capturing system.