Aerosol filters-II theory of the pressure drop across multi-component glass fibre filters

✍ Scribed by L.A. Clarenburg; F.C. Schiereck

• Book ID: 103001438
• Publisher: Elsevier Science
• Year: 1968
• Tongue: English
• Weight: 658 KB
• Volume: 23
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(68)85012-2

✦ Synopsis

Based on geometrical considerations a theoretical equation has been derived relating pressure drop to filter-and fibre properties of multi-component glass fibre filters. For a great number of filters theoretical predictions of the pressure drop are in excellent agreement with the experimental results for filter porosities not exceeding 0.94. These results constitute an indirect proof of the validity of the theory of tortuosity presented in an earlier paper. It was shown that by minor variations of the composition of a filter, almost without affecting the pressure drop, considerable gains in aerosolretention can be achieved. 1. INTRODUCTION This paper is intended as a continuation of our previous article[l]: Theory of the pressure drop across single component glass fibre filters.

A theoretical equation will be derived for the pressure drop across multi-component glass fibre filters of arbitrary composition. Again use will be made of the author's theoretical work on pore size distributions [3] and tortuosity [4] in fibrous filters; this means that also the present theory is based on purely geometrical filter considerations.

2. THEORETICAL

Consider a n-component glass fibre filter. Let the weight composition of the filter be denoted as