基于混凝沉降原理,对旋流器和涡流反应器的结构进行改进,提出了一种新型旋流混凝设备,该设备集混合、絮凝、沉降于一体,介绍了其结构及工作原理.基于计算流体力学(CFD)方法,运用CFX软件对其内部流场进行了数值模拟分析,依据产水率、速度和速度梯度进行功能评价,以此确定结构优化方法.研究结果表明:对底流口口径、入流口结构、接触面圆角进行优化可以有效改善旋流混凝器的性能;采用对称双切向入口,上部出口交界面采用倒角,底流口直径小于30 mm,可达到旋流混凝器的设计功能要求.

Aiming to the surface water pollution situation and drinking water-induced disease in rural area of Jianghan Plain, the rural water purification scheme and technology were designed to meet the basic drinking water demand of rural populations. The designed technology considered both the tight-structure demand of integrated equipment and the water purification function;the ozone pre-oxidation and coagulating sedimentation are selected as pre-treatment, the reliable quartz sand filtering are se-lected as regular treatment and the ultraviolet sterilization and membrane separation are chosen as advanced treatment. Based on the technical design of water treatment, a set of hydro -cyclone and enhanced coagulation equipment is designed, which in-tegrates mixing, flocculating and settling. As a modularization design, the water purification system is tight in structure, conven-ient in installation and use, and provides a new method for the purification of drinking water in rural areas.

The stress distribution of cylinder of double-layer shrunk-on ultrahigh pressure vessel under non-working condition and working condition was simulated by using finite element analysis software. The strength theory was used to optimize wall thickness and interference of the cylinder, which not only could decrease the interference to reduce installation difficulty, but also make stress distribution of each layer of cylinder achieve equal, stress change of the inner wall, inner tube to outer tube wall could be decreased, the tube material could be saved.

管道作为油气运输的载体,其性能直接影响油气储运的安全性和经济性.针对某凝析气田等径三通管件严重腐蚀导致出现管壁偏蚀刺漏等情况.用ADINA有限元分析软件,对现场缓蚀剂实际加注情况进行数值模拟.结果表明,粒径为25 u m的缓蚀剂液滴,在管道介质流速为11.09m/s时,缓蚀剂在管道内部所有部位的浓度均低于标准浓度5.1×103ppm,因此才会出现腐蚀失效的情况.同时做了保持粒径不变,改变管输介质流速和保持管输介质流速不变,调整粒径大小的两组对比仿真,得到结论为,缓蚀剂粒径越小,管输介质流速越低,越有利于缓蚀剂在管道内部的均匀分布.