Dust holding capacity

The dust holding capacity ( English dust retention capacity and dust holding capacity , French capacité de colmatage ) is a measure for the evaluation of filters for gas cleaning , in particular of depth filters . However, it is also used to characterize dust- absorbing media.

Filtration

In filtration , the dust storage capacity indicates the mass of dust that can be stored in a filter until a specified final pressure drop is reached .

In the now withdrawn standard DIN 24185 Part 1, this definition was also referred to as static dust storage capacity and was distinguished from dynamic dust storage capacity , which was based on a unit area and required an automatic renewal of the filter medium.

Dust holding capacity and service life

The dust holding capacity is only a relative quantity that cannot give any indication of the filter service life . They are measured using synthetic test dust . It only makes sense to use this size if the particle size distribution of the dust is known.

A homogeneous fiber distribution strives to increase the dust holding capacity with a low pressure loss at the same time. Attempts are also made to optimize their dust storage capacity by means of a multi-stage design of filter systems. In the case of respiratory masks , an extension of the service life is sought by using multi-layer filter media.

Other meanings

A mop's ability to bind loose dust is also known as its dust holding capacity.

See also

• Dust separation performance

literature

• VDI 3677 Part 2: 2004-02 Filtering separators; Depth fiber filters (filtering separators) . Beuth Verlag, Berlin. ( Summary and table of contents online )

Individual evidence

1. ↑ DIN EN 14799: 2007-07 Air filters for general air cleaning; Terminology; Trilingual version EN 14799: 2006. Beuth Verlag, Berlin, p. 15.
2. ↑ DIN EN 779: 2012-10 Particle air filters for general ventilation technology; Determination of the filter performance; German version EN 779: 2012 . Beuth Verlag, Berlin. P. 10.
3. ↑ VDI 4700 sheet 1: 2015-10 Terms in construction and building technology . Beuth Verlag, Berlin. P. 140.
4. ↑ DIN 24185 Part 1: 1980-10 Testing of air filters for general air conditioning; Terms, units, procedures . Beuth Verlag, Berlin. P. 2.
5. ↑ VDI 3677 sheet 2: 2004-02 Filtering separators; Depth fiber filters (filtering separators) . Beuth Verlag, Berlin. P. 23.
6. ^ T. Christopher Dickenson: Filters and Filtration Handbook . 4th edition. Elsevier Oxford 1997, ISBN 1-85617-322-4 , p. 216.
7. ^ Ernst-Rudolf Schramek, Hermann Recknagel, Eberhard Sprenger: Pocket book for heating + air conditioning . 73rd edition. Oldenbourg Industrieverlag Munich 2007, ISBN 3-8356-3104-7 , p. 1203.
8. ↑ Albert Hellmann, Kilian Schmidt, Siegfried Ripperger, Christoph Thelen, Carsten Möhlmann: Determination of the separation effect of fibrous filter media against ultrafine particles . In: Hazardous substances - cleanliness. Air . 72, No. 11/12, 2012, ISSN  0949-8036 , pp. 484-488.
9. ↑ Jens Nävy , Matthias Schröter: Facility Services - the operational level of facility management . Springer Vieweg Berlin / Heidelberg 2013, ISBN 978-3-642-39543-7 , p. 222.