静态管道混合器流场分布特性研究

发布时间：2018-10-17 19:15

【摘要】：随着社会经济的发展,水资源日益紧缺。给水加药系统在国内油田采油废水处理过程中不可或缺,然而目前国内常采用水资源浪费严重、经济效益较低的搅拌池加机械搅拌设备,因此研究经济效益高、符合可持续发展规划的静态混合器至关重要。本文采用混合单元分为左旋右旋两部分的螺旋混合器,进而确定新型管道混合器结构设计；利用CFD软件分析研究混合器流场特性,通过模拟研究不同参数的混合器,分析得出随着叶片组数增加混合器流动阻力明显增大、叶片扭转角增大混合效果提高压降略有增加,模拟分析三种加药方式,采用加药效果最优的三支加药管管内加药方式,叶片长度对混合器混合效果影响较小,因此可以根据现场要求选择叶片长度,同时进一步优化静态混合器螺旋叶片组数、叶片扭转角度、加药方式以及叶片长度；确定混合器结构计算,设计并使用双筒相套结构新型便携式取样器；建立混合器混合效果检测评价方法,通过混合度明确表达混合器混合效果,同时通过聚丙烯酰胺浓度的测定实验确定新型混合器具有良好的混合效果。新型螺旋混合器混合效果明显、压降损失较低、能耗较少同时能够有效利用水资源,因而具有良好的社会、经济利用价值。
[Abstract]:With the development of social economy, water resources are becoming increasingly scarce. Feed water dosing system is indispensable in the treatment of oil recovery wastewater in domestic oil field. However, at present, the mixing tank and mechanical mixing equipment with serious waste of water resources and low economic benefit are often used in our country, so the economic benefit of the research is high. A static mixer in line with sustainable development planning is essential. In this paper, the structure design of a new type of pipe mixer is determined by using the helical mixer, which is divided into two parts of left-handed and right-handed parts, and the flow field characteristics of the mixer are analyzed by using CFD software, and the mixer with different parameters is studied by simulation. The results show that with the increase of the number of blades, the flow resistance of mixer increases obviously, the mixing effect of blade torsion angle increases slightly, and the pressure drop is slightly increased. The blade length has little effect on the mixer mixing effect, so the blade length can be selected according to the field requirements, and the number of spiral blades, blade torsion angle, dosing mode and blade length of static mixer can be further optimized. Determine the mixer structure calculation, design and use a new type of portable sampler with double phase sleeve structure, establish a mixing effect detection and evaluation method of mixer, express the mixing effect of mixer through mixing degree. At the same time, it is proved that the new mixer has good mixing effect by measuring the concentration of polyacrylamide. The new screw mixer has the advantages of obvious mixing effect, low pressure drop loss, less energy consumption and effective utilization of water resources, so it has good social and economic value.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.71

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