Abstract: Five kinds of scale inhibiting capacity evaluation methods, including calcium carbonate precipitation method, bubbling method, ultimate carbonate hardness method, turbidimetric method and conductivity method, have been used for evaluating the scale inhibiting capacities of PBTCA and another seven kinds of water quality stabilizers in stimulated water. The results show that calcium carbonate method and bubbling method are suitable for preliminary screening of a large number of chemicals, and the time consumption of bubbling method is comparatively long. Ultimate carbonate hardness method has better accuracy and repetition rate, suitable for carrying out the capacity evaluation of the chemicals added to cooling water system the last time. Turbidimetric method and conductivity method are convenient and swift, and can be used for the chemicals whose scale inhibiting capacities have obvious differences, and can rapidly be distinguished, and both of the accuracy and repetition rates of the latter are better than that of the former.

Key words: water quality stabilizers, scale inhibition, evaluation methods

摘要： 采用碳酸钙沉积法、鼓泡法、极限碳酸盐硬度法、浊度法、电导率法5种阻垢性能评价方法评价了PBTCA等8种水质稳定剂在模拟水中的阻垢性能。结果表明，碳酸钙沉积法和鼓泡法适用于对大量药剂进行初步筛选，鼓泡法相对耗时较长；极限碳酸盐硬度法准确度和重现性较好，适用于对最终投入冷却水系统使用的药剂进行性能评价；浊度法和电导率法试验快捷方便，可用于快速区分阻垢性能差异明显的药剂，且后者的准确度和重现性均好于前者。

关键词: 水质稳定剂, 阻垢, 评价方法

CLC Number: 

• TQ085+.4