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一、概述在给水净化过程中,一般需经过沉淀或澄清的阶段,在原水中投加混凝剂就是为了形成密实的絮体为快速沉淀创造良好条件。长期以来混凝剂的投加都是由人工凭经验来完成的目前还没有一套完整、科学的计量装置,即使有的水厂在投药管路上安装了转子流量计,但由于流量和浑浊度并未经常测定,投加混凝剂仍免不了带有一定的盲目性操作人员往往为了追求较低的出水浊度而过分加大混凝剂的用量,这样一来,既造成了浪费又恶化了水质。近年来国内外一些大中型水厂对自动投加混凝剂装置进行了研究,路内水厂基本上还没
I. Overview In the purification process of water supply, it is generally necessary to go through the stage of precipitation or clarification. The addition of coagulant in the raw water is to create a compact floc to create favorable conditions for rapid precipitation. For a long time, the dosage of coagulant was artificially completed. There is no complete and scientific metering device. Even if some water plants have rotameters installed on the pipelines, due to the flow rate and turbidity It is not always determined that the addition of coagulant is still inevitably accompanied by a certain amount of blindness. Operators often excessively increase the amount of coagulant in order to pursue lower effluent turbidity, which results in waste and deterioration. Water quality. In recent years, some large and medium-sized water plants at home and abroad have studied the automatic dosing of coagulant devices.