| Title |
An Experimental and Numerical Study on the Oxy-MILD Combustion at Pilot Scale Heating Capacity |
| Authors |
Chun-Loon Cha ; Ho-Yeon Lee ; Sang-Soon Hwang |
| DOI |
http://dx.doi.org/10.6110/KJACR.2016.28.7.275 |
| Keywords |
MILD ; 희석연소 ; 산소연소 ; 재순환율 ; 희석효과 ; 유입효과 Moderate and Intense Low-oxygen Dilution ; combustion ; Oxy-fuel combustion ; Recirculation ratio ; Dilution effect ; Entrainment effect |
| Abstract |
MILD (Moderate and Intense Low-oxygen Dilution) combustion using oxygen as an oxidizer is considered as one of the most promising combustion technologies for high energy efficiency and for reducing nitrogen oxide and carbon dioxide emissions. In order to investigate the effects of nozzle angle and oxygen velocity conditions on the formation of oxygen-MILD combustion, numerical and experimental approaches were performed in this study. The numerical results showed that the recirculation ratio (Kv), which is an important parameter for performing MILD combustion, was increased in the main reaction zone when the nozzle angle was changed from 0 degrees to 15 degrees. Also, it was observed that a low and uniform temperature distribution was achieved at an oxygen velocity of 400 m/s. The perfectly invisible oxy-MILD flame was observed experimentally under the condition of a nozzle angle of 10° and an oxygen velocity of 400 m/s. Moreover, the NOx emission limit was satisfied with NOx regulation of less than 80 ppm. |