水力空化装置设计模拟及强化降解苯酚的研究

发布时间：2018-10-08 08:58

【摘要】：根据水力学原理,自制水力空化装置,基于Fluent软件模拟空化装置中文丘里管内部场的分布,并用其联合Fenton试剂强化降解模拟苯酚废水.考察了空化时间,入口压力,溶液p H值和苯酚初始浓度对苯酚降解效果的影响.实验结果表明:空化时间为120min,入口压力为0.4MPa,p H值为3.0,初始浓度为60mg/L时苯酚降解效果最好,降解率可达55.74%.水力空化/Fenton对模拟苯酚废水降解结果显示,当加入H_2O_2浓度为120mg/L,Fe~(2+)的浓度为30mg/L,空化120min,降解率可达96.62%,较单独使用水力空化时降解率提高了40.88%,较单独使用Fenton时降解率提高了55.65%.动力学研究表明,苯酚降解近似为一级反应,其强化因子f为2.46.最后,采用水力空化/Fenton联用处理新疆宜化实际煤气化废水,苯酚和COD降解率60min分别可达72.9%和78.6%,120min分别可达78.3%和84.2%.
[Abstract]:According to the principle of hydraulics, a self-made hydraulic cavitation device was developed to simulate the distribution of the internal field of Venturi tube in the cavitation unit based on Fluent software, and to enhance the degradation of simulated phenol wastewater with Fenton reagent. The effects of cavitation time, inlet pressure, pH value of solution and initial concentration of phenol on the degradation of phenol were investigated. The experimental results show that when the cavitation time is 120 min, the inlet pressure is 0.4 MPA / h = 3.0, and the initial concentration is 60mg/L, the degradation efficiency of phenol is the best, and the degradation rate can reach 55.74%. The results of degradation of simulated phenol wastewater by hydraulic cavitation / Fenton showed that when the concentration of H_2O_2 was 120 mg / L, the degradation rate reached 96.62 2 min, and the degradation rate was increased by 40.88% and 55.65% respectively when the concentration of H_2O_2 was 120 mg / L and the concentration of Fe2 was 30 mg 路L ~ (2). Compared with hydraulic cavitation alone, the degradation rate was increased to 96.62%, and 55.65% higher than that of Fenton alone. The kinetic study showed that the degradation of phenol was approximately a first-order reaction, and the enhancement factor f was 2.46. Finally, the degradation rates of phenol and COD were 72.9% and 78.6% for 120min and 78.3% and 84.2% for phenol and COD, respectively, using hydrodynamic cavitation / Fenton combination to treat the actual coal gasification wastewater in Xinjiang, and the degradation rates of phenol and COD were 72.9% and 78.6%, respectively.
【作者单位】：新疆大学化学化工学院;新疆大学煤炭清洁转化与化工过程自治区重点实验室;
【基金】：自治区重点实验室开放课题(2015KL022) 国家级大学生创新创业训练计划项目(201510755008)
【分类号】：X703

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