Abstract
A model to quantitatively describe penetration change during filter clogging through a fiber filter is proposed. This model is developed using two different analytical methods and indicates that filter penetration is a function of the coefficient K and deposited dust mass in the filter. This is verified through a number of laboratory filter experiments. The coefficient K is obtained using regression analysis via the results of the experiments with different dust loading parameters. K is expressed as a function of aerosol particle diameter, efficiency, and filter material. A larger value of K illustrates a higher increasing rate of efficiency during clogging. A larger value of K also correlates with a smaller aerosol particle size and a higher penetration filter.
Highlights
As a simple and effective way of particle removal from gas streams, fibrous filters are widely used in many industries, such as pharmaceutical, biotechnology, microelectronics and semiconductor manufacturing
A model to quantitatively describe penetration change during filter clogging through a fiber filter is proposed. This model is developed using two different analytical methods and indicates that filter penetration is a function of the coefficient K and deposited dust mass in the filter
Wright et al (1957) photographed aerosol particles that were deposited on individual glass fiber, and indicated that the nature of the aerosol and the deposition velocity had significant influence on the character of the deposit
Summary
As a simple and effective way of particle removal from gas streams, fibrous filters are widely used in many industries, such as pharmaceutical, biotechnology, microelectronics and semiconductor manufacturing. Penetration and pressure drop are the most important aspects of performance of fiber filters. Only limited studies have been devoted to the penetration of a dust-loaded filter. Watson (1946) described the general process of particles accumulation on a glass fiber where they build up in chains. Wright et al (1957) photographed aerosol particles that were deposited on individual glass fiber, and indicated that the nature of the aerosol and the deposition velocity had significant influence on the character of the deposit. It was found that the density of compaction of the aerosol deposit was the main factor in determining the effect of dust loading on the pressure drop and collection efficiency
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