废水深度处理反应器流体数值模拟与优化

发布时间：2018-03-26 20:45

本文选题：深度处理反应器　切入点：数值模拟　出处：《林产化学与工业》2017年04期

【摘要】：利用Fluent软件对废水深度处理反应器的流体进行三维数值模拟比较,结果表明:旋流式布水器可在反应器内形成类似于桨式搅拌器的流态形式,搅拌效果好。示踪剂模拟显示,相对于消能引流布水器,旋流式布水器粒子滞留时间更接近理论停留时间,返混更小,可作为深度处理反应器的布水器。对深度处理反应器进行数值模拟,结果显示流体经过催化剂层后只存在上向层流,无搅拌混合作用,影响药液混合反应效果,采用螺旋折流板对反应器进行优化,优化后的流速矢量发散并有旋流涡流,流体搅拌更充分,优化后速度接近原来的4倍。优化后的深度处理反应器压力降主要位于进口处,其次位于催化剂层,螺旋折流板对压力的损失可以忽略。
[Abstract]:Three-dimensional numerical simulation of the fluid in wastewater advanced treatment reactor was carried out by using Fluent software. The results show that the swirling water distributor can form a flow pattern similar to that of an impeller in the reactor, and the mixing effect is good. The tracer simulation shows that, Compared with the energy dissipation and draining water dispenser, the particle retention time of the swirl water distributor is closer to the theoretical residence time and the backmixing is smaller, so it can be used as the water distributor of the advanced treatment reactor. The numerical simulation of the advanced treatment reactor is carried out. The results show that there is only upward laminar flow after the fluid passes through the catalyst layer, no agitation, which affects the effect of the mixture reaction. The reactor is optimized by the helical baffle, and the velocity vector diverges and there is swirl eddy current after the optimization. The pressure drop of the optimized advanced treatment reactor is mainly located at the inlet, followed by the catalyst layer, and the pressure loss of the spiral baffle plate can be neglected.
【作者单位】：中国林业科学研究院林业新技术研究所;中国林业科学研究院林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室;
【基金】：中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2016SY029)
【分类号】：TQ052;X703

【相似文献】