Authors:
S. I. Cheberiachko, Dr. Sc. (Tech.), Prof., orcid.org/0000-0003-3281-7157, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
O. O. Yavorska, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0001-5516-5310, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
D. H. Klimov, orcid.org/0000-0002-3817-9697, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A. V. Yavorskyi, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-4484-3723, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract:
Purpose. To determine the dependence between the design parameters (diameter and height) of a filtering box, the gas filter resistance and the protective power time.
Methodology. The calculation results of the filter sorption capacity for the specified organic compound are obtained involving classic statements of the theory of monomolecular adsorption. Experimental studies of gas filters were carried out according to DSTU EN 13274-3:2005 “Respiratory protective devices. Testing methods”.
Findings. It is shown that in terms of the similar sorbent volume and dimensions of the outlet of a filtering box with the exhale valve, the increasing filter area reduces considerably the breathing resistance; however, that results in the reduced protective time of a gas respirator. It has been determined that in this case an increased filter area causes nonuniform distribution of the filtration rate over the filter area and, as a result, nonuniform use of the filter sections. A section in front of the outlet experiences the greatest load in terms of sorption of the harmful gases.
Originality. It has been specified that the increase in the outlet diameter relative to the filter diameter prolongs the protective time of a filter in terms of the same sorbent volume.
Practical value. Dimensions of a filtering box have been identified to provide uniform use of the sorbent and maximum protective time.
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