Development of ammonia co-firing burner with coal for coal firing boiler

抄録

Coal firing power plant operated as one of main power sources in many countries must apply significant CO2 reduction technology immediately. Recently ammonia utilization has been investigated as one of effective solutions for CO2 reduction. IHI has developed ammonia co-firing burner and the related combustion technology, then ammonia co-firing burner for demonstration was designed and verified up to now. Ammonia combustion is expected NOx increasing when ammonia combustion in coal fired power plant due to much nitrogen content. Therefore, it is required for ammonia combustion to maintain NOx emission and unburnt combustible in ash simultaneously as same level as coal firing condition. IHI designed some ammonia co-firing burners for demonstration in commercial plant and conducted combustion testing in considering with actual plant operating condition. Co-firing rate of ammonia is set at 20% in calorific value basis. As the result of investigation by combustion testing and study for ammonia combustion at 20% co-firing, IHI found out the burner design condition for ammonia co-firing to maintain NOx and unburnt combustible at the all condition of plant operation and has developed ammonia co-firing burner for demonstration.