| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively prevent a cooling water system from generating calcium carbonate scale in water treatment using no phosphorus compound. <P>SOLUTION: The method for preventing the cooling water system from scaling includes adding water-soluble polymers and zinc compounds to the cooling water system. The zinc compounds are added so that the concentration of zinc in the cooling water system becomes 0.5-3 mg/L and the water-soluble polymers are added so that the concentration of the water-soluble polymers becomes 2-50 mg-solid content/L. Addition of the water-soluble polymers and the zinc compounds together without using phosphorus compounds can raise the CSI of the water system and effectively prevents the cooling water system from generating scale, especially calcium carbonate scale, even though the system includes high calcium hardness water. <P>COPYRIGHT: (C)2013,JPO&INPIT |
