卤水净化工艺CPAM絮凝机理研究

概述了石灰-烟道气法卤水净化工艺中苛化反应和碳化反应机理。对硫酸钠型卤水净化工艺中阳离子聚丙烯酰胺（CPAM）的絮凝机理进行了探讨：CPAM分子酰胺基上的2个氢原子与碳酸钙微晶中的羰基氧原子形成一种稳定的四边形氢键结构，并且与碳酸钙微晶内部的四边形结构通过羰基双键形成一个类似哑铃的对称结构，增加了整个分子结构的稳定性，极大提高了CPAM的絮凝能力。相似地，CPAM分子酰胺基上的2个氢原子与硫酸钙微晶中硫酸根上的2个氧原子极易形成一种非常稳定的六边形氢键结构。实验表明，当CPAM加入量为2 mg/L时，可以保证硫酸钠型卤水中钙质量浓度低于10 mg/L。

Research on CPAM coagu-flocculation mechanism in brine purification process

The mechanisms of caustification and carbonation reactions of lime-flue gas brine purification process were reviwed. Then the CPAM flocculating mechanism of sodium sulfate type brine purification process was discussed：two hydrogen atoms of amide group of CPAM molecules and carbonyl oxygen atoms of the CaCO3 molecules to form a stable quadrilateral hydrogen bond structure，and quadrilateral with CaCO3 molecular internal structure by carbonyl symmetrical structure of the double bonds to form a similar dumbbell，increase the stability of the whole of the molecular structure，and this structure greatly im- proves the flocculating ability of CPAM.Similarly，two hydrogen atoms on molecular amide group of CPAM and two oxygen atoms of sulfuric acid root ion in CaSO4 microcrystalline to form a very stable hexagonal hydrogen bond structure.When the addition of CPAM was 2 mg/L，it′s sure that the calcium′s mass concentration in sodium sulfate type brine was less than 10 mg/L.