摘要
在一个实验室规模流化庆反应器上进行了三种煤的燃烧试验,以估计在流化床燃烧过程中燃料成分和主要运行参数对N_2O和NO生成的影响。试验结果证实,在923K至1273K温度下N_2O排放量很高(30～200μL/L)。决定燃料氮生成N_2O的主要参数是燃烧温度、煤种和过量氧。降低温度导致N_2O生成量增加而同时NO生成量减少,烟煤N_2O产量要比贫煤高一些。空气燃料比影响N_2O产量,特别在接近理想配比燃烧工况时,N_2O排放减少。燃料粒径对N_2O的产生在低温下有一定影响,在高温下影响不大、加入石灰石脱硫使N_2O排放减少。
Results of combustion testing on three kinds of coal, which was carried out in a laboratory FBC reactor to determinethe influence of coal components and main operation perameters on the N_2O and NO formation, show that the hishest N_2Oemission (30~200_礚/L) is noted at 923K^1273K. The main influence paraters of N_2O formation are combustion tem-perature. kinds of coal and oxygen excess. Temperature reduction leads to increasing N_2O formation, but to reducing NOformation; bituminous coal yields more N_2O than lean coal. Air-coal ratio influences on N_2O formation, perticutarly N_2Oformation is reduced when combustion proceeds with a air-coal ratio near to a stoichiometric value. Particle size of coal ex-erts an influence on N_2O formation to some extent at lower combustion temperature, but a little at higher temperature.
出处
《热力发电》
CAS
北大核心
1994年第6期29-35,共7页
Thermal Power Generation
