高矿化度矿井水的结垢预测及影响因素分析  

Prediction of scale formation in high salinity mine water and analysis of influencing factors

作　　者：胡丽娜 董立婷 杜一枝 王玉忠 张亚超 HU Lina;DONG Liting;DU Yizhi;WANG Yuzhong;ZHANG Yachao(School of Electrical Engineering,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《工业水处理》2025年第4期99-105,132,共8页Industrial Water Treatment

基　　金：自治区重点研发任务专项(2022B03028-4);省部级高层次人才引进计划(TCBR202106);新疆维吾尔自治区自然科学青年基金项目(2021D01C100)。

摘　　要：以新疆乌东矿矿井水为研究对象,采用Oddo-Tomson饱和指数法对矿井水中的CaCO_(3)、CaSO_(4)进行结垢趋势预测,并通过静态结垢实验研究了单一CaCO_(3)垢、CaSO_(4)垢及混合沉积垢在换热金属表面上的沉淀机制。实验还分析了不同工况下矿井水在金属表面的结垢规律、结垢物成分及形貌。结果表明:高矿化度矿井水中CaCO_(3)成垢速度快,形成过程中基本观测不到诱导期,晶体主要由方解石和文石构成;而CaSO_(4)成垢速度慢,静态实验中结垢诱导期为10 min,晶体呈针状。混合垢沉积过程中,成垢机制主要由CaCO_(3)主导,壁上首先形成文石层,随后CaSO_(4)晶体生长。同时,随着温度的上升,矿井水的结垢量及晶型均有不同程度的变化:温度为70℃时有CaSO_(4)析出,实验结果与Oddo-Tomsom饱和指数法的计算结果一致;当温度提高到80℃时,CaCO_(3)有二次成核的趋势。This study focused on the well water from Wudong mine in Xinjiang as the research subject.The Oddo-Tomson saturation index method was employed to forecast the scaling trends of CaCO_(3) and CaSO_(4) in the mine water.Additionally,the mechanism of deposition of individual CaCO_(3) and CaSO_(4) scales,as well as mixed sedimentary scales on heated metal surfaces was investigated through static scaling experiments.The scaling pattern,composi-tion,and morphology of scaling substances on metal surfaces caused by mine water was analyzed under various working conditions.The results indicated that in highly mineralized mine water,the formation of CaCO_(3) scales was rapidly,with no discernible induction period observed during the scale formation process.The crystals primarily con-sisted of calcite and aragonite.In contrast,CaSO_(4) scales were formed at a slower rate,with a 10 minute induction pe-riod observed in static experiments with the form of needle-like structures.During the deposition process of mixed scales,the scaling mechanism was primarily dominated by CaCO_(3),with an aragonite layer initially forming on the wall,followed by the growth of CaSO_(4) crystals.with the increase of temperature,there were varying degrees of change in the scaling volume and crystal form of the mine water:at 70℃,CaSO_(4) precipitated,and the experimental results were consistent with those of the Oddo-Tomsom saturation index method.When the temperature rised to 80℃,CaCO_(3) showed a trend of secondary nucleation.

关 键 词：Oddo-Tomson饱和指数法 矿井水 硫酸钙 碳酸钙 

分 类 号：X703.1[环境科学与工程—环境工程]