소형 석탄-암모니아 혼소반응기 내에서의 NO 및 NH3의 농도분포
NO and NH3 Distribution in a Small Scale Coal-ammonia Co-firing Reactor
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As part of reducing greenhouse gas emissions, verification efforts targeting commercial thermal power generation facilities are actively underway not only in Korea but also in many other countries around the world. Securing stability against nitrogen oxides or ammonia slip generated during the energy conversion process is very important for the successful use of ammonia co-firing technology. Through this study, we attempted to effectively control NO generation and minimize ammonia slip by analyzing the behavior of fuel and oxidizer within the furnace. The concentration of reaction gas containing ammonia was measured in the reaction field, and the effect of combustion factors such as ammonia injection location and oxidant supply method on NOx distribution was analyzed. There is no combustion delay due to ammonia co-firing, and there is little possibility of ammonia slip occurring during normal operation. As the co-firing ratio increases, the amount of NO production tends to increase. Since a large amount of oxygen is supplied intensively to the ammonia reaction, NO production can increase significantly, so care must be taken during co-firing system design. Implementing high temperature air combustion in ammonia mixture helps to suppress NO generation. And it is thought that using multi-stage combustion of oxidizer and separate supply of ammonia will be effective in reducing NO generation by inducing reduction reaction.
Abstract
As part of reducing greenhouse gas emissions, verification efforts targeting commercial thermal power generation facilities are actively underway not only in Korea but also in many other countries around the world. Securing stability against nitrogen oxides or ammonia slip generated during the energy conversion process is very important for the successful use of ammonia co-firing technology. Through this study, we attempted to effectively control NO generation and minimize ammonia slip by analyzing the behavior of fuel and oxidizer within the furnace. The concentration of reaction gas containing ammonia was measured in the reaction field, and the effect of combustion factors such as ammonia injection location and oxidant supply method on NOx distribution was analyzed. There is no combustion delay due to ammonia co-firing, and there is little possibility of ammonia slip occurring during normal operation. As the co-firing ratio increases, the amount of NO production tends to increase. Since a large amount of oxygen is supplied intensively to the ammonia reaction, NO production can increase significantly, so care must be taken during co-firing system design. Implementing high temperature air combustion in ammonia mixture helps to suppress NO generation. And it is thought that using multi-stage combustion of oxidizer and separate supply of ammonia will be effective in reducing NO generation by inducing reduction reaction.
참고문헌 (15)
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