供水和污水处理

  • 干净且妥当处理的水资源是文明社会的基本要素; 是农业生产的命脉,对工业生产至关重要。作为世界上非常专注于供水应用的变频器制造商,我们深入了解所有与水有关的应用和流程。我们为您提供用于提高过程控制、水质量和资产保护的变频器解决方案,减少能源和维护成本,确保为您的工厂带来更高的可靠性和性能,增强水资源利用的可持续发展。

    水管理不必耗费过多的能源

    通常,供水和污水处理过程占到城市电费的 25–40%,相当于全球耗电量的 8%。因此,供水和污水设施通常是一个城市最大的单一电力消费者。

    随着变频器、节能组件和实际在线过程控制的广泛使用,同时结合污水处理厂消化池的沼气能源生产,如今,首个完全实现能源中和的全方位处理设施投入使用。该设施做到无需增加额外的碳能源。这种中和能源解决方案覆盖整个水循环过程,从水生产和配送到污水抽取和处理。

    减少泄露和能源消耗双管齐下 

    配水系统中消耗的能源占整个供水系统总能耗的 60–80%。根据实际需求利用压力区来调节压力并提高抽水站效率,可节省 25–40% 的能源。同时,漏水量也可减少 30–40%。

    调节供水网的压力也会带来下列好处:

    • a 新水管的断裂率减少 40–55 % 
    • 降低维护成本以及昂贵的水管和管道维修费用
    • 控制自来水细菌感染和污染(渗漏)的风险
    • 延长供水网的使用寿命 
    • 延缓对设施升级改造的投资
    • 降低水锤的风险
     

    高效的废水处理,变废为宝

    在废水处理厂中,高能耗与能源消耗量大的处理工艺和连续的工作周期有关: 全年全天无休。行业一直将重点放在开发新的流程和控制策略,以减少处理每公升水所消耗的能源。但是,对提高废水处理质量的需求(比如要求去除更多的营养素)增加了净能源消耗。这就更加需要减少采用先进过程控制产生的能耗。

    鼓风机或地表通气设备通常消耗废水处理厂所用全部能源的 40–60 %。而使用 Danfoss 变频器控制通气设备可节约 30–50% 的能源。 

    此外,利用变频器有效控制污泥平衡和污泥龄亦可降低能耗。还可提高消化池的碳含量,因此可产生更多气体用于能源生产。

    因此,最先进的设施在高度净化废水的同时还产生富余的能量。实现这一目的的前提通常有一个完全由计算机控制的设施,通过在几乎所有的旋转设备上安装变频器,以自动调整所有运行参数。

    应用

    变频器在供水行业的应用正在不断上升。如今,变频器广泛应用于所有行业,从水生产和供应到污水下水道系统和污水处理厂(无论是市政民用还是工业用)的废水抽取。变频器可控制各种泵、鼓风机、搅拌机和脱水应用中电机的速度,在节约能源和成本的同时提高性能和价值。  

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