重庆主城区钻井地热水结垢及腐蚀趋势研究  

Research of the Scaling and Corrosion Tendency of Geothermal Well Waters in the Main Urban Area of Chongqing

作　　者：余琴[1,2] 杨平恒[1,2] 程群 张媚[1,2] 谢正兰[1,2] YU Qin YANG Ping-heng CHENG Qun ZHANG Mei XIE Zheng-lan(School of Geographical Sciences, Southwest University/Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, Chongqing 400715, China Field Scientific Observation ＆ Research Base of Karst Eco-Environments at Nanchuan in Chongqing, Nanchuan Chongqing 408435, China Nanjiang Hydrogeology and Engineering Geology Team of Chongqing Bureau of Geology and Mineral Resources, Chongqing 401121, China)

机构地区：[1]西南大学地理科学学院/三峡库区生态环境教育部重点实验室,重庆400715 [2]国土资源部岩溶生态环境-重庆南川野外基地,重庆408435 [3]重庆市地质矿产勘查开发局南江水文地质工程地质队,重庆401121

出　　处：《西南大学学报（自然科学版）》2017年第10期95-101,共7页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金(41103068);重庆市院士专项(CSTC2013JCYJYS20001);2014年度重庆市国土房管科技计划项目(CQGT-KJ-2014056);中央高校基本科研业务费专项(XDJK2014A016;XDJK2015D022)

摘　　要：地热水对金属管道的结垢与腐蚀是其开发利用中常见的技术和环境问题.该文对重庆主城区36口钻井地热水物理水化学特征进行分析,采用指数法判定地热水结垢腐蚀趋势和主要的结垢物,提出阻垢防腐建议.结果表明:理论上大部分钻井地热水有轻微或严重的碳酸钙垢和硫酸钙垢,无硅酸钙垢形成,引起结垢的矿物主要为方解石等碳酸盐岩矿物;大部分钻井地热水对金属设备无腐蚀性.而实际上,重庆大部分钻井地热水有轻微的碳酸钙结垢现象,金属管道有轻微腐蚀,与指数判断结果并不完全相符.建议采用流体预处理、阻垢涂层的应用与开发等除垢方法,选择耐腐蚀的材质、修饰涂层、改变工艺流程等防腐方法.Scaling and corrosion of metal equipment are a common environmental and technical problem in the development and utilization of geothermal waters.The physical and chemical properties of a total of 36 geothermal well waters in the main urban area of Chongqing were analyzed,and based on the results the scaling and corrosion tendency of the geothermal well waters and their the chief scale products were calculated and determined with the index method.Theoretically,most of the geothermal well waters had slight or serious scaling.The main precipitated scaling matters were calcium carbonate and calcium sulfate,without calcium silicate formation.Carbonate minerals,such as calcite,were responsible for the scaling.Most of the geothermal well waters were noncorrosive to metal equipment.But actually,most of the geothermal well waters had slight calcium carbonate scaling,and were slightly corrosive to metal pipes,a fact which did not agree with the results judged with the index method.It is recommended that such descaling methods as pretreatments of geothermal well waters and application of coating layers,and such anticorrosive methods as selection of corrosion-resistant materials,coating layers and improvement of process should be adopted,preferably in combination.

关 键 词：结垢 腐蚀 钻井地热水 重庆 

分 类 号：P641[天文地球—地质矿产勘探]