城市污水处理厂鼓风机房节能潜力分析

摘要

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.