【作者】 谢嘉；

【导师】 汪华林； 张明会；

【作者基本信息】 华东理工大学 ， 动力工程， 2012， 硕士

【摘要】 旋流器作为一种典型的化工机械中的分离设备,其研究开发受到国内外的广泛关注。采用旋流器改进单元操作过程是当前研究热点。本文以粉煤灰为吸附剂,采用旋流分离器作为吸附-分离器,吸附亚甲基蓝和甲基橙的水溶液模拟的印染废水。通过正交试验法及单因素试验确定旋流吸附过程中吸附剂粒径、吸附剂浓度、有机物浓度和进口流量对有机物吸附效率和分离效率的影响,结果表明：吸附剂粒径和进口流量对分离效率影响显著,吸附剂粒径和吸附剂浓度对吸附效率影响显著。在最佳旋流吸附条件即吸附剂粒径为350-400目,吸附剂浓度为900mg/L,有机物浓度为70mg/L,进口流量0.88m3/h时,对亚甲基蓝的吸附效率为60.57%,对甲基橙的吸附效率为71.48%。此外,拟合出旋流吸附过程中粉煤灰吸附有机物的吸附等温线方程及吸附动力学方程。对旋流器内流场进行模拟,获得了旋流器内部的压力场、切向速度、轴向速度分布等。更多还原

【Abstract】 As a typical equipment for separation, hydrocyclone has been widely studied all over the world. The implementation of it into the unit process is also a hot issue currently.Printing and dyeing wastewater, represented by the water solution with methylene blue and methyl orange, is treated using fly ash as the adsorbent and hydrocyclone as the separation device in this study. An orthogonal test and a single factor experiment were designed to determine the influence of the particle size of fly ash, concentration of fly ash, organic concentration and inlet flow on the organic adsorption efficiency and separation efficiency. The results show that the particle size of fly ash and inlet flow rate have more influence on the separation efficiency, while particle size of fly ash and concentration of fly ash influence more on the adsorption efficiency. In the best working condition for adsorption (particle size of fly ash is 350-400 mesh, concentration is 900 mg/L, organic concentration is 70 mg/L, and inlet flow rate is 0.88 m3/h), adsorption efficiency of methylene blue and methyl orange is 60.57%and 71.48% separately. The isotherms and kinetic models for adsorption process inside a hydrocyclone were also obtained.Moreover, Computational Fluid Dynanics (CFD) method was adopted to investigate the distributions of pressure and velocities inside a hydrocyclone.更多还原