Filtration Efficiency Study of Industrial Effective Vacuum Cleaner

• Main Authors: Chou, Yu-An, 周育安
• Other Authors: Tsai, Chuen-Jinn
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/24142241214264544229

碩士 === 國立交通大學 === 環境工程系所 === 98 === In the present study, an efficient industrial vacuum cleaner and a general industrial vacuum cleaner were used to investigate the filtration efficiency of nanoparticles. The test results showed that in three filtration elements of the efficient vacuum cleaner: filtration paper bag, filter cloth, and HEPA cartridge, nanoparticles were mainly collected by the final HEPA cartridge. In addition, the emitted particles of the vacuum motor were found to mainly consist of metal, carbon, and soluble ions, and nanoparticles were found to be generated by the evaporation of lubrication oil. The final HEPA cartridge solved the motor emission problem in which most of the emitted nanoparticles were below 100 nm in diameter and peaked at about 10 nm. In comparison, the general industrial vacuum cleaner has only two filtration elements: filter cloth and filter cartridge, and the emitted particle number concentration of its motor was found to be about 19 times higher than the efficient vacuum cleaner. In addition, test results showed that the general vacuum cleaner had a low collection efficiency for nanoparticles. In this study, a filter cartridge made of high efficiency fibrous filter was fabricated to install behind the exhaust port of the general industrial vacuum cleaner. Test results showed that the filtration efficiency of nanoparticles was increased to greater than 83% and high concentration nanoparticles emitted by the motor could be removed efficiently.