Experimental study on particle plugging in ultrafine capillaries

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Tian, Mei^1 ; Han, Xiaoyuan^1 ; Gan, Zongyu^1 ; Wang, Yindong^1 ; Zou, Ronghu^1

Northwest Institute of Nuclear Technology, Xi'an, Shaanxi

710024, China^1

关键词: Aerosol exposures;    Bore sizes;    Capillary bores;    Leak paths;    Practical procedures;    Pressure differences;    Ultrafine;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/5/052014/pdf
DOI  :  10.1088/1755-1315/237/5/052014

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A practical procedure was used to study the plugging process of particles in ultrafine capillaries with bore sizes ranging from 10 to 20 μm and lengths from 10 mm to 40 mm under pressure differences from 60 to 400 kPa. The results show that the particle plugging in capillary is a popular phenomenon and plugging process is of great uncertainties. The ultrafine capillary could be plugged completely under a certain pressure difference after a long period aerosol exposure, and the plugging position was diagnosed to be at or near the leak path entrance. It was believed that pressure difference might play a special role in plugging situation as well as compactness of the deposit. In many cases, the deposit was not firm enough, and could be re-suspended. The possibility of complete plugging decreases gradually with the increase of the capillary bore, but partly plugging and unplugging of the capillary may occur repeatedly.