In view of the limited effect of traditional water treatment technology on desulfurization wastewater treatment,taking the gas desulfurization wastewater of a steel coking plant as the research object,a new advanced oxidation technology-subcritical water oxidation was selected,and its effect on desulfurization wastewater treatment at different temperatures,pressures,pollutant concentrations was investigated.At the same time,experiments were made to explore the corrosion of five different materials under the subcritical environment.The results showed that:when the subcritical water environment reaction temperature reached 260℃,the reaction pressure was maintained at 6.0 MPa,the reaction time was 1 h,and the gas-liquid ratio was 100∶1,the COD degradation efficiency of desulfurization wastewater and its concentrate could reach more than 80%,and the removal efficiency of SCN-,volatile cyanide,total cyanide and other toxic substances could reach 99%;in the subcritical water environment,the heat exchanger and reactor made of TA10 titanium alloy had relatively optimal corrosion resistance.
关键词
亚临界水氧化技术/脱硫废液/高级氧化/浓缩减量/材质腐蚀
Key words
subcritical water oxidation technology/desulfurization waste liquid/advanced oxidation/reducing volume via concentration/material corrosion
维普
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