26 KB562 KB24 KB200020242004Kizek, JanLazić, LadislavVarga, Augustínletnik:38številka:56 stranistr. 269-274ISSN:1580-2949COBISSID:363178URN:URN:NBN:SI:doc-YIELNPNRenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijedušikovi oksidigorilnikiredukcijazgorevanjeAn experimental and numerical study of the influence of FGR on NOx formation|In many countries NOx emissions are limited because of their adverse impact on the environment. Different methods to reduce the amount of NOx released into the environment from combustion devices have been developed. The main technique to prevent NOx formation in accordance with the regulation limit at a reasonable cost is flue-gas recirculation (FGR). This paper presents the results of laboratory tests to determine the emissions of nitrogen oxides from a standard natural-gas-fired burner. There was a marked effect on the NOx emissions by varving the excess air and the quantity of recirculated flue gases in the combustion air. A significant reduction in the NOx, by approximately 80 %, was achieved by external flue-gas recirculation. The results obtained from the measurements were compared with those obtained from a calculation of the equilibrium compositions and the adiabatic flame temperature of the combustion products related to the quantity of supplied combustion air and recirculated flue gasesV številnih državah je emisija NOx omejena zaradi škodljivega vpliva na okolje. Razvite so bile različne metode za zmanjšanje NOx, emitiranega v okolje iz zgorevnih naprav, in najvažnejša metoda za preprečenje tvorbe NOx, skladno s predpisi in za sprejemljivo ceno je recirkulacija zgorevnih plinov (FGR). V tem članku predstavljamo rezultate serije laboratorijskih preizkusov, namenjenih ugotavljanju emisije dušikovih oksidov iz standardiziranega gorilnika za zemeljski plin. Emisija NOx je močno odvisna od prebitka zraka in od količine recirkuliranih zgorevnih plinov v zraku za zgorevanje. Pomembno zmanjšanje NOx, približno 80 %, je bilo doseženo z eksterno recirkulacijo zgorevnih plinov. Eksperimentalno določene vrednosti so bile primerjane s tistimi, ki so bile izračunane na osnovi ravnotežne sestave in adiabatske temperature plamena v odvisnosti od količine zgorevnega zraka in recirkuliranih zgorevnih plinovTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije