【摘要】 面向工业雾气排放过程的水回收需求，提出一种将空冷式冷凝与静电除雾过程集成的静电水回收方法，可实现水蒸气与液滴的协同捕获。构建水蒸气冷凝与静电捕雾过程相耦合的数学模型，数值分析离子风强化水蒸气冷凝的机理及静电水回收器的性能。研究表明环境空气侧自然对流换热系数仅为雾气侧对流换热系数的10%,通过针状放电极产生离子风在空气侧形成局部冲击射流，可使空气侧的局部对流换热系数呈脉冲状分布，最大强化幅度约13倍。相比空气侧为自然对流的情况，在空气侧设置7层放电极所产生的离子风可使水蒸气收集效率强化1.5倍。在定义的雾气和空气条件下，静电水回收器的水蒸气和液滴收集效率最高分别可达9.2%和97.7%。更多还原

【Abstract】 For the water recovery needs of the industrial fog emission process, an electrostatic water collection method integrating the air-cooled condensation and electrostatic fog collection processes was proposed, which can achieve the synergistic collection of the water vapor and droplets. The mathematical model for the process coupling the water vapor condensation and electrostatic fog collection processes was established. The mechanism of the ionic wind-enhanced water vapor condensation and the performances of the electrostatic water collectors were investigated numerically. The results show that the heat transfer coefficient of the natural convective on the air side is only 10% of that of the forced convection on the fog side. The ionic wind generated by the needle discharge electrode on the air side forms a local impingement jet, which causes the pulse-like distribution of the local convective heat transfer coefficient with a maximum enhancement of 13 times. Compared with the natural convection on the air side, the ionic wind generated by 7 layers of discharge electrodes on the air side can increase the water vapor collection efficiency by 1.5 times. For the fog and air conditions defined in this paper, the electrostatic water collectors can achieve a maximum a maximum water vapor collection efficiency of 9.2% and droplet collection efficiency of 97.7%.更多还原