基于CFD模拟的智能自适应PID控制一体化污水处理系统  

Intelligent adaptive PID control integrated sewage treatment system based on CFD simulation

作　　者：许睿 樊德强 李建 XU Rui;FAN Deqiang;LI Jian(School of Computer and Information Security,Guilin University of Electronic Technology,Guilin 541004,China;School of Life and Environmental Sciences,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学计算机与信息安全学院,广西桂林541004 [2]桂林电子科技大学生命与环境科学学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2024年第6期628-633,共6页Journal of Guilin University of Electronic Technology

基　　金：广西重点研发计划(桂科AB21196063);桂林市重大成果转化项目(20190213-1);广西自然科学基金(2021GXNSFAA220056)。

摘　　要：针对当前养殖废水传统处理工艺成本高、效率低和占地面积大等问题,采用CFD模拟技术设计了一种利用水动力循环回流的一体化污水处理系统。通过有限元模拟寻优设备空间几何结构,设计了一种新的污水生化处理单元回流方式,减少了动能设备的数量和能耗。构建了模糊自适应PID控制系统,精准控制各单元的溶解氧浓度,可减少生物反应池溶解氧波动幅度。模拟结果表明,当厌氧池至缺氧池与缺氧池至好氧池的开口比为4∶1时,池体剖面的流速分布比较均匀,流体的循环可以避免形成死水区,从而减少污泥沉积。试验结果表明,研制的一体化系统运行稳定,可连续监测数据,COD、氨氮和TN去除率分别达98.76%、97.57%和96.43%,溶解氧能耗降低了20%。In view of the current problems of high cost and low efficiency of traditional aquaculture wastewater treatment process,integrated sewage treatment equipment has attracted much attention because of its low investment cost,small footprint and good treatment effect.An integrated sewage treatment system based on CFD simulation technology using hydrodynamic recycling was designed.By optimizing the pond structure and changing the recycling mode of sewage biochemical treatment unit,the use of kinetic energy equipment was reduced.The fuzzy adaptive PID control system was applied to aeration system in order to intelligently control the concentration of dissolved oxygen in each unit and reduce the fluctuation of dissolved oxygen in biological reaction tank.The simulation results show that the velocity distribution of tank body profile is more uniform,and the circulation of fluid is beneficial to avoid the formation of dead water zone and reduce sludge deposition,in the case of the opening ratio of anaerobic pool to anoxic pool and anoxic pool to aerobic pool is 4:1.According to the analysis of continuous monitoring data,the integrated equipment ran stably,the removal rates of COD,TN and ammonia nitrogen reach 98.66%,96.43%and 98.57%,and the fuzzy adaptive PID control system could save 20%energy consumption after controlling dissolved oxygen.

关 键 词：一体化设备 CFD模拟 溶解氧 PID控制 脱氮 

分 类 号：X703[环境科学与工程—环境工程] TP273[自动化与计算机技术—检测技术与自动化装置]