전산유체역학을 활용한 시멘트 제조 공정의 염소 바이패스 시스템 최적화 연구
Optimization of the Chlorine Bypass System in the Cement Manufacturing Process Through Computational Fluid Dynamics
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The cement industry is an energy-intensive and carbon-emitting sector, highlighting the increasing importance of greenhouse gas reduction strategies and the development of related technologies to achieve carbon neutrality. Greenhouse gas emissions from the cement manufacturing process can be classified into process emissions, direct emissions, and indirect emissions. Among these, direct emissions resulting from fuel combustion can be mitigated by substituting conventional bituminous coal with alternative fuels such as waste synthetic resin. However, waste synthetic resins contain chlorine, which can adversely affect the manufacturing process and cement quality. To minimize these negative impacts, the chlorine bypass (CBP) system is essential. The bypass ratio is proportional to the fuel substitution rate, and when the substitution rate exceeds 65%, a bypass ratio of 12% is required to maintain an appropriate chlorine concentration in the kiln under the carbon neutrality roadmap. This study employed computational fluid dynamics to determine the optimal probe design conditions for a CBP system capable of efficiently processing 12% of the extracted gas. The proposed design is expected to facilitate the expansion of waste synthetic resin fuel utilization and contribute to the reduction of greenhouse gas emissions.
Abstract
The cement industry is an energy-intensive and carbon-emitting sector, highlighting the increasing importance of greenhouse gas reduction strategies and the development of related technologies to achieve carbon neutrality. Greenhouse gas emissions from the cement manufacturing process can be classified into process emissions, direct emissions, and indirect emissions. Among these, direct emissions resulting from fuel combustion can be mitigated by substituting conventional bituminous coal with alternative fuels such as waste synthetic resin. However, waste synthetic resins contain chlorine, which can adversely affect the manufacturing process and cement quality. To minimize these negative impacts, the chlorine bypass (CBP) system is essential. The bypass ratio is proportional to the fuel substitution rate, and when the substitution rate exceeds 65%, a bypass ratio of 12% is required to maintain an appropriate chlorine concentration in the kiln under the carbon neutrality roadmap. This study employed computational fluid dynamics to determine the optimal probe design conditions for a CBP system capable of efficiently processing 12% of the extracted gas. The proposed design is expected to facilitate the expansion of waste synthetic resin fuel utilization and contribute to the reduction of greenhouse gas emissions.