Abstract:

The scale inhibition capacity of PCA for CaCO₃ and CaSO₄ has been studied through synthetic and inhibition experiments and the analysis of the form of polluted samples. The results show that PCA has low scale inhibition rate for CaCO₃,but the inhibition effect on CaSO₄ is very good. When PCA dosage is 2 mg/L,the scale inhibition rate for CaSO₄ reaches above 90%,which is superior to that of the traditional scale inhibitors HEDP and PESA significantly. The CaCO₃ scale crystals turn into flakes after PCA has been added,which makes the scale texture porous. The length of CaSO₄ scale crystals becomes shorter,the crystal surface becomes distorted severely and scale texture is porous,too,no longer smooth and compact.

Key words: PCA, CaCO₃, CaSO₄, scale inhibition

摘要：

通过合成和阻垢实验及垢样形貌分析，研究了聚柠檬酸对CaCO₃和CaSO₄的阻垢性能。结果表明，聚柠檬酸对CaCO₃的阻垢率很低；对CaSO₄的阻垢效果很好，当聚柠檬酸投加量为2 mg/L时，阻CaSO₄垢率可达到90%以上。与传统阻垢剂羟基亚乙基二膦酸（HEDP）和聚环氧琥珀酸（PESA）相比，聚柠檬酸对CaSO₄的阻垢效果明显优于HEDP和PESA。加入聚柠檬酸后CaCO₃垢晶体变成片状，垢质疏松；CaSO₄垢晶体长度变短，晶体表面不再光滑致密，出现严重畸变，垢质也比较疏松。

关键词: 聚柠檬酸, CaCO₃, CaSO₄, 阻垢

CLC Number: 

• TQ316.3

• TQ085