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Low NOx combustion and SCR flow field optimization in a low volatile coal fired boiler (CROSBI ID 251866)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Liu, Xing ; Tan, Houzhang ; Wang, Yibin ; Yang, Fuxin ; Mikulčić, Hrvoje ; Vujanović, Milan ; Duić, Neven Low NOx combustion and SCR flow field optimization in a low volatile coal fired boiler // Journal of environmental management, 220 (2018), 30-35. doi: 10.1016/j.jenvman.2018.05.009

Podaci o odgovornosti

Liu, Xing ; Tan, Houzhang ; Wang, Yibin ; Yang, Fuxin ; 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 flue gas velocity deviations at furnace exit, leading to flow field unevenness in the SCR (selective catalytic reduction) 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 to improve flow field uniformity of SCR system. 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 to 650 mg/Nm³ to 330– 430 mg/Nm³. The sample standard deviation of the NOx emissions at the outlet section of SCR decreased from 34.8 mg/Nm³ to 7.8 mg/Nm³. The consumption of liquid ammonia reduced from 150 to 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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nije evidentirano

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nije evidentirano

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nije evidentirano

Podaci o izdanju

220

2018.

30-35

objavljeno

0301-4797

1095-8630

10.1016/j.jenvman.2018.05.009

Povezanost rada

Strojarstvo

Poveznice
Indeksiranost