超临界水氧化技术中有关设备腐蚀问题的研究进展

超临界水氧化技术是一种新兴的有机废物和废水处理技术。该技术是基于水的温度和压力均超过超临界值(673.3 K和22.12 MPa)时,水的物理性质发生迅速变化而得到的。此时超临界水拥有很强的溶解能力,是氧化分解难溶物质的一种理想均相介质。虽然目前该技术有很大的前景,但是腐蚀问题严重的阻碍了该技术的工业化应用。本文在对超临界水氧化技术的研究基础上着重对水溶液有关参数进行分析,希望通过调节有关参数来减小设备的腐蚀。其次,对超临界水氧化中耐腐蚀性的材料进行分析,以便研发出不同介质中的抗腐蚀性较好的设备。

Progress in corrosion problem in process of supercritical water oxidation

Supercritical water oxidation is a new technology for treating organic pollutants and wastewater.When the temperature and pressure exceeds the critical value of water(Tc=374.2℃ and Pc=22.12 MPa),the physical properties of water changes tremendously.In details,supercritical water can dissolve some materials generally insoluble in liquid water,especially some organic chemicals can be oxidized and decomposed efficiently in supercritical water,which is regarded as a kind of ideal homogeneous medium.Although the technology has many advantages,the problem of corrosion seriously hinders the industrial application of the technology.This paper reviews the research progress on the corrosion problem occurring in the process of supercritical water oxidation.The relevant parameters are analyzed for reducing the corrosion to the materials of equipment.Beyond,this work reviews some corrosion-resistance materials used in the process of supercritical water oxidation in order to develop better equipments against corrosion in different media.