高盐工业废水浓缩工艺中的换热器结垢机理和阻垢技术

Review of Heat Exchanger Fouling Mechanism and Anti-Scaling Technology in High-Salt Industrial Wastewater Concentration Process

高盐废水处理是环境保护领域的主要研究对象,其高含盐量和高硬度的特征提高了污水处理工艺难度。国家对污染物提出的“零排放”要求使得热蒸发成为了高盐废水处理的必经之路,随之带来的换热器结垢问题给蒸发浓缩工艺带来了巨大的阻垢难题。因此,针对高盐废水的有效阻垢技术成为了研究热点。介绍了高盐废水工业处理中的结垢机理和影响因素,并对现有的阻垢技术进行总结分析,为研究高盐废水换热器结垢、除垢、阻垢问题提供研究思路。

High-salt wastewater treatment is the one hot research field in the environmental industry.Its characteristics of high organic matter,high salt content,and high hardness limit the wastewater treatment process.Thermal evaporation is necessary since the national requirement of pollutants,i.e.,‘Zero Emission’is proposed.The scaling problem of heat exchanger has brought huge problems to the industrial production chain.How to solve the scaling problem of heat exchanger and put forward effective scale inhibition technology for high salt wastewater has,therefore,become a research hotspot.This paper mainly introduces the scaling mechanism and influencing factors of high salt wastewater in industrial treatment.It also summarizes and analyzes the existing scale inhibition technologies,so as to provide theoretical support for future research of scaling,descaling,and scale inhibition of high salt wastewater heat exchangers.