污水好氧生物处理工艺中供气系统的优化与节能分析  

Optimization and Energy-saving Analysis of Aeration System on Aerobic Biological Wastewater Treatment

作　　者：韦朝海 叶国杰 李泽敏 韦景悦 李富生 江承付[3] WEI Chaohai;YE Guojie;LI Zemin;WEI Jingyue;LI Fusheng;JIANG Chengfu(School of Environment and Energy,South China University of Technology,Guangzhou 510006,China;River Basin Research Center,Gifu University,Gifu 501-1193,Japan;Baowu Group Guangdong Shaoguan Iron&Steel Co.,Ltd,Shaoguan 512123,China)

机构地区：[1]华南理工大学环境与能源学院,广东广州510006 [2]岐阜大学流域研究中心,日本岐阜501-1193 [3]宝武集团广东韶关钢铁有限公司,广东韶关512123

出　　处：《水处理技术》2021年第4期1-8,29,共9页Technology of Water Treatment

基　　金：国家自然科学基金项目(U1901218);广东省科技计划项目-国际科技合作领域(2018A050506009)。

摘　　要：对于污水好氧生物处理技术而言,供气系统包括曝气方式/装置、气体输送管线、曝气器(气体释放头)、反应器/反应池以及结合运行程序的监控仪表等,以节能降耗作为考察目标,本文全面分析了供气系统中的常见曝气方式的适用范围、影响因素、优化控制与节能途径。以鼓风曝气方式为主要考察对象,分析了空气从风机到曝气池释放的全过程耗能及节能途径,讨论了鼓风机的类型特征与污水处理适用范围,综合分析了环境因素(气温、气压、含湿量、粉尘)对供气系统稳定运行带来的影响并提出了设置空气预净化、采用管道内涂层以及合理布管等建议,如通过加装调节阀、选用枝状或环状管网、优化安装深度等措施实现气体在管道输送及分配过程中的低耗能运行,通过选择曝气器的孔径及安装位置来提高反应器内的传质,通过参数集成的精准控制实现供气系统的优化与节能。综合上述,认为污水处理好氧生物技术供气系统的优化必须包括高效的供风装置、低阻力的空气输送与分配、合理的曝气器安装以及均匀稳态流场反应器设计等的有效结合。For aerobic biological wastewater treatment processes,the aeration system includes aeration methods or devices,gas delivery pipelines,aerators/gas release heads,reactors,and monitoring instruments for operating procedures,etc.As the objective of energy-saving,this study comprehensively analyzed the application scope,influencing factors,optimization control and energy saving ways of common aeration methods in the aeration system.With blast aeration process as the main investigation subject,the energy-consumption and energy-saving ways of air release from blower to aeration tank were analyzed.Specifically,this paper discussed the relationship between selection characteristics of blower equipment and application scope of wastewater treatment.Also,we investigated the influence of environmental factors(like air temperature,air pressure,air humidity and dust) on the aeration system and put forward some suggestions such as setting up pre-purification system,adopting inner coating and decorating pipelines reasonable.The stable operation of the aeration system could be achieved by installation of regulating valves,selection of branched or ringshaped pipe network and optimization of installation depth.It also concluded that two ways could achieve low energy-consumption of gas transportation and distribution process,including selecting aperture and installation depth of the aerator to improve the mass transfer and accurate aeration volume control of parameter integration to achieve optimization and energy-saving of air supply system.To sum up,it is believed that the combination of high-efficiencyair supply devices,low resistance air delivery and distribution process,reasonable aerator installation and steady-state flow field reactor design are the important factors to optimize aeration system for aerobic biological wastewater treatment.

关 键 词：供气系统 空气输送 影响因素 污水生物处理 节能优化 

分 类 号：X703[环境科学与工程—环境工程]