【摘要】 基于静态变螺距螺旋切割原理自主研发了一种高效低耗、易操作的新型溶氧曝气装置。运用响应面法研究了空气流量、液体流量、水体深度对标准氧转移系数、氧利用率和理论动力效率的影响。结果表明,当空气流量为0.5 m³/h、液体流量为10 m³/h、水体深度为0.3 m时,新型溶氧曝气装置的标准氧转移系数、氧利用率、理论动力效率分别为1.4394 min^-1、37%、7.4388 kg O₂/（kW·h）;装置较传统曝气设备具有显著优势。粒径分布测定结果表明,61.31%的气泡粒径集中在0.1μm以下,37.27%的气泡粒径集中在20～75μm,表明新型曝气设备所产生的气泡属于微纳米气泡;该装置可用于水体增氧、养殖、黑臭水体修复和污水处理等方面,应用前景广阔。更多还原

【Abstract】 Based on the principle of static variable-pitch helical cutting, a new type of dissolved oxygen aeration device was developed with high oxygen transfer efficiency, low energy consumption and easy-operation.Response surface method was used to investigate the effects of air flow, liquid flow and water depth on the standard oxygen transfer coefficient, oxygen utilization efficiency and theoretical power efficiency.The results showed that the aeration device achieved a better oxygenation performance over traditional aeration equipment when the air flow rate was 0.5 m³/h, the liquid flow rate was 10 m³/h and the water depth was 0.3 m.For example, standard oxygen transfer coefficient was 1.4394 min-, oxygen utilization efficiency was 37% and theoretical power efficiency was 7.4388 kg O₂/（kW·h）.Particle size distribution showed that 61.31% of the bubbles generated by the new aeration device was less than 0.1 μm and 37.27% of that was in 20～75 μm,indicating that the generated bubbles belong to the micro-nanometer bubbles.Therefore,the developed aeration device can be a promising aeration method in terms of water oxygenation, aquaculture, black and odor water body remediation, and sewage treatment.更多还原