Naslov
Low NOx Combustion and SCR Flow Field Optimization in a Low Volatile Coal fired boiler

Autori
Liu, Xing ; Tan, Houzhang ; Wang, Yibin ; Mikulčić, Hrvoje ; Vujanović, Milan ; Duić, Neven

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
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, 2017

Skup
12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES

Mjesto i datum
Dubrovnik, Hrvatska, 04.10.2017. - 08.10.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
NOx ; burner ; coal combustion ; air staging ; low volatile coal ; flow field optimization

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA