Low NOx Combustion and SCR Flow Field Optimization in a Low Volatile Coal fired boiler (CROSBI ID 654084)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Liu, Xing ; Tan, Houzhang ; Wang, Yibin ; Mikulčić, Hrvoje ; Vujanović, Milan ; Duić, Neven
engleski
Low NOx Combustion and SCR Flow Field Optimization in a Low Volatile Coal fired boiler
Low NOx burner redesign and deep air staging have been carried out to optimize the poor ignition and reduce the NOx emissions in a low volatile coal fired 330 MWe boiler. Residual swirling flow in the tangentially-fired furnace caused the flue gas velocity deviations at furnace exit, leading to flow field unevenness in the SCR system and poor denitrification efficiency. Numerical simulations on the velocity field in the SCR system were carried out to determine the optimal flow deflector arrangement. Full-scale experiment was performed to investigate the effect of low NOx combustion and SCR flow field optimization. Compared with the results before the optimization, the NOx emissions at furnace exit decreased from 550~650 mg/Nm³ to 330~430 mg/Nm³. The sample standard deviation of the NOx emissions at the outlet of SCR decreased from 34.8 mg/Nm³ to 7.8 mg/Nm³. The consumption of liquid ammonia reduced from 150~200 kg/h to 100~150 kg/h after optimization.
NOx ; burner ; coal combustion ; air staging ; low volatile coal ; flow field optimization
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Podaci o prilogu
2017.
objavljeno
Podaci o matičnoj publikaciji
Digital Proceedings of 12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES
Ban, Marko et al.
Zagreb: Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu
1847-7178
Podaci o skupu
12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES
predavanje
04.10.2017-08.10.2017
Dubrovnik, Hrvatska