城市污水处理厂鼓风机房节能潜力分析

Energy-saving potential analysis for the air blower room of the urban wastewater treatment plant

在城市污水处理厂能耗结构中,鼓风机房权重约为50%,并且由于技术和管理水平的限制,鼓风机房存在着严重的电能浪费问题。以某采用改良A2/O工艺的城市污水处理厂工程为例,通过鼓风机房单位水量电耗与生物系统单位水量需氧量的比较,对2009年12个月鼓风机房的节能潜力进行了分析。结果表明,鼓风机房单位水量电耗和好氧池需氧量随月份的变化趋势并不一致,其年均节能潜力为62%;仅通过鼓风机房的节能,污水处理厂的年均节能潜力就能达到27.2%,污水处理单耗就能由0.219 kW.h/m3降低到0.159 kW.h/m3,可节约运行费用110.885 8万元/a。

In energy consumption structure of the urban wastewater treatment plant,the air blower room with a rough ratio of 50%.The problem of serious electricity waste exists in the air blower room because of restriction of technology and management level.Taking some urban wastewater treatment plant with modified A2/O process as an example,energy-saving potential of the air blower room in the year of 2009 was analyzed by comparing electricity consumption for a ton of wastewater of air blower room with oxygen demand for a ton of wastewater of biological system.The results showed that： the variation trend with months of electricity consumption for a ton of wastewater of air blower room and oxygen demand for a ton of wastewater of biological system was inconsistent,and the air blower room energy-saving potential was 62% on average in a year;only by energy-saving of the air blower room,average energy-saving potential of the wastewater treatment plant could come to 27.2% in a year,electricity consumption for treating a ton of wastewater could be reduced from the original 0.219 kW·h/m3 to 0.159 kW·h/m3,and at the same time 110.885 8 million CNY of operation cost can be saved in a year.