深部煤矿降温系统管道结垢与腐蚀机理研究

发布时间：2018-07-21 12:43

【摘要】：管道结垢及腐蚀问题是国内外深部高温矿井降温工程中面临的技术难题,本文以张双楼煤矿降温系统管道结垢及腐蚀作为研究对象,首先,现场调研结垢及腐蚀严重的区域并采集表面物质样品及水样进行实验分析,得到降温系统管道水物理化学特性；其次,建立化学反应模型、数学模型及运用电化学腐蚀原电池等理论,进行降温系统管道结垢及腐蚀机理的理论分析；最后,利用第一性原理方法建立计算模型,从微观尺度验证降温系统管道结垢及腐蚀机理理论分析结果。研究结果表明：1)降温系统管道表面物质以CaCO3和铁的氧化物为主；2)张双楼煤矿降温系统管道水温维持在恒定的范围：10-35℃,且具有“高硬度、高矿化度、弱碱性”的化学特性；3)深井降温系统管道结垢机理为Ca2+与C032-离子的结合结晶以及CaSO4、MgCO3的转化。4)深井降温系统管道腐蚀机理为杂质离子及溶解氧的促进作用。研究结果对于其它高温矿井降温系统管道结垢、腐蚀机理及防垢、防腐措施研究具有重要的借鉴意义。
[Abstract]:The problem of pipe scaling and corrosion is a technical problem in deep high temperature mine cooling project at home and abroad. In this paper, the pipe scaling and corrosion in the cooling system of Zhangshuanglou Coal Mine is taken as the research object. Field investigation of serious scaling and corrosion areas and collection of surface material samples and water samples for experimental analysis to obtain the cooling system pipe water physical and chemical characteristics. Secondly, establish a chemical reaction model, The mathematical model and the theory of electrochemical corrosion primary battery are used to analyze the scaling and corrosion mechanism of cooling system pipeline. Finally, the calculation model is established by first principle method. The theoretical analysis results of scaling and corrosion mechanism of cooling system pipeline are verified from microscopic scale. The results show that the surface material of the cooling system is mainly CaCO3 and iron oxides. The water temperature of the cooling system of Zhangshuanglou Coal Mine is maintained in the constant range of 10 ~ (-35 鈩，

本文编号：2135565