三角形孔口多孔板水力空化特性研究

Study on hydrodynamic cavitation characteristics of triangular orifices plates

随着废水中污染物成分越来越复杂,传统水处理技术已经很难满足相应的处理要求。水力空化是一种新型水处理技术,空化泡溃灭形成的微射流、冲击波能在短时间内释放巨大的能量。此外,空化泡溃灭时产生的局部异常高温高压可以使水分子结合键断裂产生具有高氧化能力的羟基自由基·OH,可以与其它分子发生化学反应。采用三角形孔口多孔板作为水力空化发生器,研究了多孔板孔径大小、开孔数目对其水力空化特性的影响,并结合对硝基苯酚废液处理实验得出多孔板型水力空化反应器能够用于含酚类废水处理,为以后含酚类难降解废水处理提供参考.

As the pollutant constituents in wastewater become more and more complex, traditional wastewater treatment technology has been difficult to meet the processing requirements. Hydrodynamic cavitation is a new technique in wastewater treatment schemes. The collapsed cavitation bubbles which result in the generation of microjets and shock waves can release tremendous amounts of energy in a short time. Moreover, the local extremely high temperature and pressure resulted from bubble collapse in cavitation can induce the rupture of chemical bond of water and the occurrence of free hydroxyl radical ~ OH . The ~ OH with strong oxidation capacity can react to other molecules. The triangular orifices plates were used as the reactor of hydrodynamic cavitation. This paper analyzes the influence of the orifice diameter and orifice number on cavitation characteristics. The experiment about P-NP treatment shows the cavitation reactor can be used in phenol wastewater treatment, which can provide a reference for the further research.