优化水泵叶轮选型用于污水处理厂节能降耗

Energy Saving and Cost Consumption Reduction from Wastewater Treatment Plants by the Optimization of Pump Impeller Selection

作为污水处理厂的高耗电单元,水泵的效率高低会显著影响污水处理厂的节能降耗运行。针对昆山市某污水处理厂存在的水泵流量偏小以及气蚀严重等问题,选择了比较经济高效的方案——优化水泵的叶轮选型,并对比了技改前、后的运行效果。结果表明,技改之后的水泵能够在实际工况下处于高效运行区,在保证提升流量达到生产需求的前提下,仅通过更换水泵叶轮即可使污水处理厂的电费降低0.018元/m^3,节能效果明显。

As a high power consumption unit of the wastewater treatment plant, the efficiency of the pump may significantly influence the effect of energy-saving operation of WWTP. According to the problems of small water pump flow and serious cavitation erosion existed in a wastewater treatment plant in Kunshan, a cost-effective method based on the optimization of pump impeller selection was utilized. The operational results showed that the water pump could perform high efficiency by optimizing the impel- ler selection under actual working conditions. By means of replacing the pump impeller, the electricity cost of WWTP would be reduced 0. 018 yuan/m3 when the wastewater flow reached the requirement of full-scale operation, which indicated considerably energy-saving performance.