双区式电凝并技术对提高细微粉尘凝并效率的影响

为了进一步提高电凝并装置对细微粉尘的凝并效率，降低细微粉尘对人体的危害，设计一种由双极芒刺预荷电区和平行板收尘区组成的双区芒刺式电凝并装置，通过实验探究了安装双区芒刺预荷电装置、极配间距、外加电压3个凝并参数对细微粉尘凝并效率的影响。结果表明：当外加电压≤13 kV时，细微粉尘的凝并效率随外加电压的升高而增大，而当外加电压>13 kV时，电凝并效率无明显提高；安装双极芒刺预荷电装置和缩短极配间距都可以有效提高细微粉尘凝并效率，当外加电压为13 kV时，极配间距由0.03 m缩短至0.02 m，各粒径粉尘的凝并效率均有10%以上的提高。根据实验结果可以得出，细微粉尘电凝并最优实验参数为安装双极芒刺预荷电装置、极配间距0.02 m、外加电压13 kV。以上研究结果可为电凝并技术的推广及工业应用提供参考。

Effect of two-zone electrocoagulation technology on improving the coagulation efficiency of fine dust

In order to further improve the coagulation efficiency of fine dust by electrocoagulation device and reduce its harm to human body, a type of two-zone thorn-type electrocoagulation device consisting of bipolar burr pre-charged area and parallel plate dust collection area was developed. And the experiments were conducted to study the effects of three coagulation parameters: the installation of two-zone burr pre-charged device, the polar spacing, the applied voltage on the coagulation efficiency of fine dust. The results showed that when the applied voltage was not higher than 13 kV, the coagulation efficiency of fine dust increased with the increase of applied voltage. While the electrocoagulation efficiency didn’t increase obviously when the applied voltage exceeded 13 kV. The installation of bipolar burr pre-charge device and shortening polar spacing could effectively improve the coagulation efficiency of fine dust. When the applied voltage was 13 kV and the polar spacing was reduced from 0.03 m to 0.02 m, the coagulation efficiencies of dusts with all sizes increased by over 10%. According to the experimental results, the optimal experimental parameters for fine dust electrocoagulation were as follows: the installation of the bipolar burr pre-charge device, the polar spacing of 0.02 m, and the applied voltage of 13 kV. The research results can provide a theoretical basis for the promotion of electrocoagulation technology and industrial applications.