含油污水处理用立式多级气旋浮装置的理论与实验研究

发布时间：2018-01-21 10:49

本文关键词： 含油污水微细气泡气浮分离离心分离除油效率　出处：《北京化工大学》2015年硕士论文　论文类型：学位论文

【摘要】：高含水油田、深水油田开发以及日趋严格的环保标准迫切需要研制紧凑高效的含油污水处理技术设备。论文在探究国内外不同厂家的气浮旋流一体化设备结构及工作原理基础上,结合本课题组已有理论体系,首次在国内推出了内部两级串联协同运行的立式气旋浮装置实验样机。前期提出五种可行结构方案并进行一一对比论证,挑选出理论上最优的设计方案进行结构设计。在现有理论体系下,依靠处理量、停留时间、旋流强度等主要设计参数控制设备初始结构尺寸。后期利用GAMBIT软件进行建模,并利用ANSYS FLUENT软件对内部核心构件的尺寸进行改进与优化。实验阶段由两部分构成：微细气泡性能评估实验及气浮旋流设备除油实验。微细气泡性能评估实验利用宁波公司所提供的气泡发生器进行室内实验研究,摸索流量、注气比、注气压差三个参数对微细气泡粒径影响的规律,为后续的实验提供一定的参考。实验结果表明：较小的微孔孔径、较大的流量、适当的注气比与注气压差有利于形成较好的微细气泡。气浮旋流设备除油实验分单级与内部两级串联实验两部分进行,借助设备单级运行的正交实验、变流量实验摸索出大致的最优参数；基于设备单级运行的最优参数进行内部两级串联设备的实验研究。实验结果表明：在不添加破乳剂的情况下,设备单级稳定运行时除油效率约为30%左右,两级稳定运行时除油效率约为35%左右；加入破乳剂后,设备两级串联稳定运行时除油效率约为45%左右。本文通过理论研究与实验研究相结合的方式,验证了内部两级串联气浮旋流一体化设备的可行性,为下一阶段即将进行的改进优化及工业放大提供了一定的指导。
[Abstract]:High water cut oil fields. The development of deepwater oil fields and the increasingly stringent environmental protection standards urgently require the development of compact and efficient oil-bearing sewage treatment technology equipment. This paper explores the structure and working principle of air-floatation swirl integrated equipment from different manufacturers at home and abroad. Go. Combined with the existing theoretical system of our group, the experimental prototype of the vertical cyclone floatation device is first developed in China. Five feasible structural schemes are put forward and compared one by one. The optimal design scheme is selected for the structural design. Under the existing theoretical system, it depends on the processing capacity and the residence time. The main design parameters, such as swirl intensity, control the initial structure size of the equipment. GAMBIT software is used to model the model later. The size of internal core components is improved and optimized by ANSYS FLUENT software. The experiment consists of two parts:. The performance evaluation experiment of micro bubble and the deoiling experiment of air floatation swirl equipment. The performance evaluation experiment of micro bubble is carried out in laboratory by using bubble generator provided by Ningbo company. The effects of three parameters, such as flow rate, gas injection ratio and air pressure difference, on the particle size of micro bubble are studied. The experimental results show that the smaller pore diameter and larger flow rate can be used as reference for further experiments. Proper gas injection ratio and air pressure difference are favorable to the formation of fine bubbles. The oil removal experiment of air floatation swirl equipment is divided into two parts: single stage and internal two stage series experiment, with the aid of the orthogonal experiment of single stage operation of the equipment. The approximate optimal parameters are found out by variable flow experiments. Based on the optimal parameters of the single stage operation of the equipment, the experimental results show that the oil removal efficiency of the equipment is about 30% when the demulsifier is not added. The oil removal efficiency of two-stage stable operation is about 35%; With the addition of demulsifier, the oil removal efficiency of the equipment is about 45% when the two-stage series operation is stable. This paper combines the theoretical and experimental studies. The feasibility of the internal two-stage air-floatation swirl integrated equipment is verified, which provides some guidance for the improvement and optimization and industrial amplification in the next stage.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

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