B4-SH11A ding to orderrelated documentation Free space fo Bevel-helical gear Reduction Box B4

Flender/Flender Gear Units/Bevel-helical gear Reduction Box B4

Soot can possibly be considered leading component for PAHs. The question if this assumption applies to different flame types (yellow and blue flames) and to different types of fuel will also be object of the investigations. 1 Furthermore, the results of these investigations should give knowledge about the expressive- ness of routinely executed measurements (done by the chimney sweep) and should build the base for an optimal design of burners and for an economical and pollutant reduced operation of firing places 3. Results On small-scale furnace (atomizing oil burner, vaporizing oil burner), investigations with an olfactometer developped by the institute were carried out which show how odorous and hydrocarbon emissions are dependent on the burner adjustment. For this purpose, different adjustments were chosen according to the oxygen and carbon monoxide concentiations, and to the smoke spot number. The exhaust gases were mixed with odourless air, and were presented in three stages of dilution to group op examiners. The examiners established the intensity of the odour sample and estimated its hedonic effect. It turned out that the human sense of smell when breathing in does not pass on informations separatelyto the brain butthat all the other senses are active at the same time; this regards in particular the sense of taste. For this reason, the tasting perceptions were integrated into the testing programme. In order to keep the influence of unwanted sense perceptions low, cabin for odour testing was installed. The testing sequences with the diluted exhaust gases of the respective burner adjustments presented for investigation in the different dilution stages were repeated so many times until one could expect sufficient statistic reliability of the results. The exhaust ases, besides to the olfactometer, were also conducted to the sampling device for the gas cxomatojraphic anayis. By this analysis, hydrocarbons typical for combustion processe