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1 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

1 2012

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The application of modified research method described in PN - EN 50281-2-1:2002 to determine minimal inerting oxygen concentration in the mixture with nitrogen

Jaskółowski W., Kręciwik D., Półka M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2012

No. 78

111--117

The application of modified research method described in the standard PN - EN 50281-2-1:2002 to determine minimal inerting oxygen concentration in the mixture with nitrogen. The article described the results of conducted research into minimal ignition temperature of cloud dust (MTCD) for chosen dust, i.e. dust of oak, jatoba, eucalyptus and azobe (lophira alata, also called “red ironwood”) using a different oxygen concentrations (5 %, 10 %, 15 %, 21% , 50 %) in the mixture with nitrogen, which was used to force dust in recovery chamber. The research was carried out in accordance with modified research method described in the standard PN-EN 50281-2-1:2002. The article also presented that the suitability of this method to solve the research problem is not significant, referred to in the title of the article. The start of ignition in oxygen concentration 5% and 10%, respectively, states that with certainty there was higher concentration in the moment of ignition as with such values of the oxygen concentration ignition is impossible. At standard conditions, i.e. with the oxygen concentration of 21%, the lowest ignition temperature of cloud dust was obtained for azobe dust, while the highest for eucalyptus.