CAJ | 학술논문

将低效率的燃煤锅炉改烧低热值煤层气是一项很好的节能减排措施.燃煤锅炉改烧低热值煤层气后,对炉膛内流动及燃烧过程进行了燃烧试验和三维数值模拟,分析了燃煤锅炉改烧煤层气后炉内流动及燃烧特性,并预测了炉膛内流场、温度场和甲烷组分的分布规律.结果表明,燃煤链条炉改烧低热值煤层气后,流动和燃烧状况良好,锅炉效率比燃煤时提高了25.5%.炉膛上部形成回流区;额定负荷时,CH_4浓度下降最慢,整个炉膛的火焰充满度较好.
장저효솔적연매과로개소저열치매층기시일항흔호적절능감배조시.연매과로개소저열치매층기후,대로당내류동급연소과정진행료연소시험화삼유수치모의,분석료연매과로개소매층기후로내류동급연소특성,병예측료로당내류장、온도장화갑완조분적분포규률.결과표명,연매련조로개소저열치매층기후,류동화연소상황량호,과로효솔비연매시제고료25.5%.로당상부형성회류구;액정부하시,CH_4농도하강최만,정개로당적화염충만도교호.
The low efficiency coal-burning chain link stove converted to burn low heat value coal-bed methane is an energy saving and emission reducing measure. To analyze the in-boiler flow and combustion conditions, experimental research and three-dimensional numerical simulation were conducted. The distribution of in-boiler flow field, temperature field, and CH_4 component were obtained. The predictions show that the in-boiler flow and combustion conditions are optimal. Compared to coal-fired, the boiler efficiency ratio is enhanced by 25.5%. The recirculation region is formed at the top of chamber. At the rated load, the CH_4 concentration drops slowly, and the entire chamber's flame fullness is ideal.