温度对磁化防垢效果的影响及其机理  

Influence of temperature on antiscaling performance by magnetization and its mechanism

作　　者：林星彤 王宇斌[1] 李亮[1] 王雯雯 王望泊 Lin Xingtong;Wang Yubin;Li Liang;Wang Wenwen;Wang Wangbo(School of Resources Engineering,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China;Xi'an Northwest Geological Institute Company of Nonferrous Metals Co.,Ltd.,Xi'an Shaanxi 710054,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055 [2]西安西北有色地质研究院,陕西西安710054

出　　处：《化工矿物与加工》2022年第8期55-59,共5页Industrial Minerals & Processing

基　　金：国家自然科学基金(51974218)。

摘　　要：为掌握温度与磁化预防碳酸钙结垢效果之间的关系,采用SEM表征、pH和电导率检测等方法,并结合不同温度下碳酸钙溶解平衡的热力学计算,阐明了温度对磁化防垢的影响机理,结果表明:在平行磁场作用下,温度的升高不利于磁化防垢;当温度从20℃升高到100℃时,溶液中Ca^(2+)质量浓度和电导率分别降低了59.50%和13.78%,而pH则减小了0.42。Ca^(2+)质量浓度和电导率降低的原因在于温度的升高有利于溶液中碳酸钙晶体的析出。此外,温度越高越易生成溶解度较低的方解石型碳酸钙晶体,而低温则有利于溶解度高且化学性质不稳定的球霰石型碳酸钙晶体的析出。研究成果可为不同类型管路磁化防垢提供参考。To understand the relationship between temperature and the effect of magnetization on preventing calcium carbonate from scaling,the antiscaling mechanism by magnetization as a function of temperature was illustrated by SEM representation,determination of pH and the conductivity,and thermodynamic calculation based on the solubility equilibrium of calcium carbonate at different temperatures.The results show that under the action of magnetic field,rising temperature went against the antiscaling by magnetization.As the temperature went up from 20℃ to 100℃,the calcium concentration and conductivity in the solution declined by 59.50% and 13.78% respectively,while the pH dropped by 0.42.The reason for the decrease of calcium concentration and conductivity was that the higher temperature facilitated the precipitation of calcium carbonate from solution.In addition,the higher the temperature,the more likely calcite-type calcium carbonate crystals with low solubility precipitated.The vaterite-type calcium carbonate was likely to precipitate at a low temperature,which had high solubility and unstable chemical properties.The research results can be provided as reference for antiscaling of various pipelines by magnetization.

关 键 词：磁化防垢 温度 碳酸钙 球霰石型 方解石型 

分 类 号：TQ022.12[化学工程]