Publication detail

Pressure drop evolution during dust loading of hollow-fiber membranes

BULEJKO, P. DOHNAL, M. KRIŠTOF, O. SVĚRÁK, T.

Original Title

Pressure drop evolution during dust loading of hollow-fiber membranes

English Title

Pressure drop evolution during dust loading of hollow-fiber membranes

Type

conference paper

Language

en

Original Abstract

This work focuses on the pressure drop evolution during particle loading of polypropylene HFMs. We used two types of dust to simulate a particle laden environment. Pressure drop, permeate velocity, and accumulated mass of particles until reaching the final pressure drop were recorded. Dust-holding capacity was measured after each experiment. The pressure drop increased slowly when loaded with high dust concentrations. The membrane was easily cleanable simply by shaking, with a minimal residual pressure drop. The loading profile (pressure drop/dust load curve) varied with the inner diameter of hollow fibers and permeate velocity. The loading profile of a new HFM was independent of dust concentration, which is similar to the behavior of planar fabric-based filters. However, when a cleaned membrane was used, the dependence on the dust concentration was obvious. The same was true for the fouling rate, which was higher for the cleaned membrane than for the pristine one. Based on the results, it can be concluded that the HFMs can be repeatedly cleaned and reused, which is not possible in commercially available HEPA filters. At the same time, however, they are limited to a very specific low volume, or short-term high volume applications due to the higher pressure drops caused by the hollow-fiber geometry.

English abstract

This work focuses on the pressure drop evolution during particle loading of polypropylene HFMs. We used two types of dust to simulate a particle laden environment. Pressure drop, permeate velocity, and accumulated mass of particles until reaching the final pressure drop were recorded. Dust-holding capacity was measured after each experiment. The pressure drop increased slowly when loaded with high dust concentrations. The membrane was easily cleanable simply by shaking, with a minimal residual pressure drop. The loading profile (pressure drop/dust load curve) varied with the inner diameter of hollow fibers and permeate velocity. The loading profile of a new HFM was independent of dust concentration, which is similar to the behavior of planar fabric-based filters. However, when a cleaned membrane was used, the dependence on the dust concentration was obvious. The same was true for the fouling rate, which was higher for the cleaned membrane than for the pristine one. Based on the results, it can be concluded that the HFMs can be repeatedly cleaned and reused, which is not possible in commercially available HEPA filters. At the same time, however, they are limited to a very specific low volume, or short-term high volume applications due to the higher pressure drops caused by the hollow-fiber geometry.

Keywords

Pressure drop; particle loading; hollow-fiber membrane; dust-holding capacity

Released

22.10.2019

Location

Kolín n. Rýnem

ISBN

978-3-941655-17-1

Book

International Conference and Exhibition for Filtration and Separation Technology, Filtech 2019

Pages from

1

Pages to

8

Pages count

8

URL

Documents

BibTex


@inproceedings{BUT159660,
  author="Pavel {Bulejko} and Mirko {Dohnal} and Ondřej {Krištof} and Tomáš {Svěrák}",
  title="Pressure drop evolution during dust loading of hollow-fiber membranes",
  annote="This work focuses on the pressure drop evolution during particle loading of
polypropylene HFMs. We used two types of dust to simulate a particle laden
environment. Pressure drop, permeate velocity, and accumulated mass of particles
until reaching the final pressure drop were recorded. Dust-holding capacity was
measured after each experiment. The pressure drop increased slowly when loaded
with high dust concentrations. The membrane was easily cleanable simply by
shaking, with a minimal residual pressure drop. The loading profile (pressure
drop/dust load curve) varied with the inner diameter of hollow fibers and permeate
velocity. The loading profile of a new HFM was independent of dust concentration,
which is similar to the behavior of planar fabric-based filters. However, when a
cleaned membrane was used, the dependence on the dust concentration was
obvious. The same was true for the fouling rate, which was higher for the cleaned
membrane than for the pristine one. Based on the results, it can be concluded that
the HFMs can be repeatedly cleaned and reused, which is not possible in
commercially available HEPA filters. At the same time, however, they are limited to a
very specific low volume, or short-term high volume applications due to the higher
pressure drops caused by the hollow-fiber geometry.",
  booktitle="International Conference and Exhibition for Filtration and Separation Technology, Filtech 2019",
  chapter="159660",
  howpublished="electronic, physical medium",
  year="2019",
  month="october",
  pages="1--8",
  type="conference paper"
}