三氯异氰尿酸应用特性的研究

Study on Application Features of Trichloro - isocyanuric Acid

三氯异氰尿酸在水中水解生成次氯酸和异氰尿酸,由于异氰尿酸的存在,使次氯酸在水中的状态更加稳定,因此表现出与其它氯类杀菌剂不同的一些特性,本文对三氯异氰尿酸的应用特性进行了研究。实验室静态实验研究结果表明:三氯异氰尿酸溶解时水中的余氯质量浓度先增加而后减少,大致在完全溶解时余氯质量浓度达到最大值。加入三氯异氰尿酸的初始质量浓度越大,水中余氯的衰减也就越快。污水中有机物对次氯酸的消耗造成余氯减少。在不同水质条件下,相同投加质量浓度可能会有不同的余氯初始质量浓度,表现出不同的杀菌效果。三氯异氰尿酸对不锈钢几乎无腐蚀作用,对黄铜的腐蚀比对碳钢的腐蚀强烈。该研究能够为三氯异氰尿酸在循环冷却水系统中的应用提供技术支持。

Trichloro-isocyanuric acid（TCCA） can generate hypochlorous acid and cyanuric acid when it is hydrolyzed in water.Hypochlorous acid is more static due to the existence of cyanuric acid.Therefore,TCCA exerts some features which are different from other chlorine category bactericides.In this paper,the application features of TCCA are investigated.The laboratory static tests show that the mass concentration of residual chlorine increases firstly and then decreases when TCCA is dissolved in water and approximately reaches the maximum when it is completely dissolved.The attenuation of residual chlorine is more rapid with the higher initial concentration of TCCA.The organic substances in sewerage consume the hypochlorous which results in the decrease of residual chlorine.In different water quality conditions,the same concentration of TCCA may result in different initial concentrations,representing different effect of sterilization.TCCA has little corrosion on stainless steel,and is more corrosive for brass than carbon steel.The study can provide a technical support for the application of TCCA in cooling water system.