摘要
通过数值模拟研究,评估某300MW切圆燃烧锅炉燃烧改造后由无烟煤改烧高挥发分烟煤的燃烧以及NOx排放特性。通过锅炉改造前的现场实测数据与数值模拟数据对比,指出目前研究中采用的数值模型可以合理地预测锅炉的燃烧和NOx排放特性。模拟结果表明,在锅炉燃烧改性后,氮氧化物排放量可大大降低,由原来的994mg/m^3降至323mg/m^3,减少约67.5%;并且煤粉的燃尽率有所提高。
The numerical simulations have been carried out to evaluate the characteristics of combustion and NOx emissions in a 300 MW tangentially fired boiler, which will be expected to bum high-volatile bituminous coal by combustion modification. By comparing the field measured data with the numeri cal simulation data before the transformation of the boiler, it is pointed out that the numerical model adopted in the present study can reasonably predict the combustion and N0x emission characteristics of the boiler. The simulation results show that, after the combustion modification, the N0x emission can be greatly reduced, from 994 mg/m^3 to 323 mg/m^3 reducing by about 67. 5%, and the burnout rate of pulverized coal has been improved.
作者
罗存存
Luo Cuncun(Aluminum Corporation of China Limited, Beijing 100082, China)
出处
《轻金属》
北大核心
2019年第8期57-62,共6页
Light Metals
关键词
燃煤锅炉
无烟煤
烟煤
改造
燃烧特性
NOX排放
coal-fired boiler
anthracite
bituminous coal
modification
combustion characteristics
N0x emission NOx
