Autor: Hernik, B. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical studies on the influence of air staging on the temperature of flue gas and emission of gases in the combustion chamber of OP 230 boiler
Autorzy:: Hernik, B.
Jagodzińska, K.
Matuszek, D.
Powiązania:: https://bibliotekanauki.pl/articles/185572.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: combustion
CFD
emission
boiler
NOx
spalanie
emisja
bojler
Opis:: The primary methods of reducing nitrogen oxides, despite the development of more advanced technologies, will continue to be the basis for NOx reduction. This paper presents the results of multivariate numerical studies on the impact of air staging on the flue gas temperature and composition, as well as on NOx emissions in a OP 230 boiler furnace. A numerical model of the furnace and the platen superheater was validated based on measurements using a 0-dimensional model of the boiler. Numerical simulations were performed using the ANSYS Workbench package. It is shown that changes in the distribution of air to OFA nozzles, the angle of the air outflow from the nozzles and the nozzle location involve a change in the flue gas temperature and in the volume of NOx and CO emissions at the furnace outlet.
Źródło:: Chemical and Process Engineering; 2018, 39, 1; 59--74
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: An analysis of coal and coal mine methane co-combustion in an 140 t/h pulverized coal boiler
Autorzy:: Jagodzińska, K.
Hernik, B.
Pronobis, M.
Powiązania:: https://bibliotekanauki.pl/articles/175356.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Co-combustion
methane
heat transfer
power boiler
Opis:: The paper presents an attempt to evaluate the impact of coal and coal mine methane cocombustion on the physics of the heat exchange in an 140 t/h pulverized-coal boiler through an analysis of 21 combinations of the boiler operating parameters – three diﬀerent boiler loads (50, 75, and 100%) and seven values of the ﬁred gas thermal contribution (0–60%). The obtained results are the temperature distribution of ﬂue gas and steam in the boiler characteristic points, the heat transfer coeﬃcient values for the boiler individual elements expressing the nature of changes in the heat transfer and the change in the boiler eﬃciency depending on how much gas is actually ﬁred. An increase in the amount of co-ﬁred gas involves a temperature increase along the ﬂue gas path. This is the eﬀect of the reduction in the amount of heat collected by the evaporator in the furnace. For these reason, the ﬂue gas temperature at the furnace outlet rises by 9 K on average per a 0.1 increment in the ﬁred gas thermal contribution. The temperature rise improves the heat transfer in the boiler heat exchangers – for the ﬁrst- and the secondstage superheater the improvement totals 2.8% at a 10 pp. increase in the ﬁred gas thermal contribution. However, the rise in the ﬂue gas temperature at the boiler outlet involves a drop in the boiler eﬃciency (by 0.13 pp. for a rise in the ﬁred gas thermal contribution by 0.1).
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2017, 137; 3-18
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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