Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Correlation between Air Emission Gas and Alternative Fuels Used in Cement Sintering Process

시멘트 소성공정에 사용된 대체연료와 대기배출가스간 상관관계 연구

  • 최재원 (아세아시멘트 기술연구소) ;
  • 백주익 (아세아시멘트 기술연구소) ;
  • 권상진 (아세아시멘트 기술연구소) ;
  • 원필성 (아세아시멘트 기술연구소) ;
  • 강봉희 (아세아시멘트 기술연구소)
  • Received : 2020.08.05
  • Accepted : 2020.09.07
  • Published : 2020.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we tried to verify the correlation of the amount of combustible industrial by-products, household waste used as fuels on cement sintering process and the amount of NOx, and CO, harmful components in the exhaust gas. The analysis uses coal as natural fuel, soft plastics (plastics with properties that tend to be scattered by wind, such as vinyls), hard plastics (plastics with properties that are not scattered by wind, such as PETs, wate rubbers), and reclaimed oils as alternative fuels. Utilizing the response surface analysis (RSM) technique using the process data of 2019, such as the fuel input and combustion temperature of a domestic A cement manufacturer's sintering facilities as independent variables, and the NOx, and CO emissions to the stack as dependent variables. Correlation was analyzed. As a result, it was confirmed that the impact on the emission material differs for each waste. In particular, it was analyzed that the hard plastics increase the CO emission but have an excellent effect of reducing NOx.

본 연구에서는 시멘트 소성공정에 연료로 사용된 가연성 산업부산물 및 생활폐기물의 사용량와 대기배출가스중 유해성분인 NOx, CO 발생량을 비교함으로써 상관관계를 확인하고자 하였다. 분석은 천연연료로서 유연탄, 대체연료로서 연질 플라스틱류(비닐류 등 풍력에 의해 비산되기 쉬운 성질의 플라스틱류), 경질 플라스틱류(폐고무, PET 등 풍력에 비산되지 않는 성질의 플라스틱류), 재생유를 사용하는 국내 A시멘트 제조사 소성설비의 연료투입량 및 연소온도 등 2019년 공정 데이터를 독립변수로 하고, stack으로 배출되는 NOx, CO량을 종속변수로 하여 반응표면분석(RSM) 기법을 활용해 상관관계를 분석하였다. 분석결과 폐기물마다 배출물질에 미치는 영향이 상이함을 확인하였고, 특히 경질 플라스틱류는 CO 배출은 증가시키지만 NOx를 저감하는 효과가 뛰어난 것으로 분석되었다.

Keywords

References

  1. Beychok, M.R. (1973). NOX emission from fuel combustion controlled, Oil & Gas Journal, 3, 53-56.
  2. EPA. (1994). Alternative Control Techniques Document Update - NOx Emissions from Cement Manufacturing, U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, Research Triangle Park, North Carolina.
  3. EPA. (2000). NOX Control Technologies for the Cement Industry - Final Report, U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, Research Triangle Park, North Carolina.
  4. EPA. (2007). Alternative Control Techniques Document Update - NOx Emissions from New Cement Kilns, U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, Research Triangle Park, North Carolina.
  5. FLSmidth. (2003). Emission from Cement Kilns of $SO_2$ and NOx, The International Cement Production Seminar 2003, Lecture:05-12.
  6. Gartner, E.M. (1983). Nitrogenous Emissions from Cement Kiln Feeds, in: Rule 1112 Ad Hoc Committee Meeting South Coast Air Quality Management District, El Monte, CA, June 7.
  7. Groendyk, M.A., Rothamer, D. (2015). Effects of fuel physical properties on auto-ignition characteristics in a heavy duty compression ignition engine, SAE International Journal of Fuels and Lubricants, 8(1), 200-213. https://doi.org/10.4271/2015-01-0952
  8. Hilovsky, R.J. (1977). NOX Reductions in the Portland Cement Industry With Conversion to Coal-Firing, 1977 U.S. EPA Emission Inventory/Factor Workshop. Raleigh, NC.
  9. Lefebvre, A.H. (2000). Gas Turbine Combustion, Taylor & Francis.
  10. Liu, H., Xu, J., Zheng, Z., Li, S., Yao, M. (2013a). Effects of fuel properties on combustion and emissions under both conventional and low temperature combustion mode fueling 2,5-dimethylfuran/diesel blends, Energy, 62, 215-223. https://doi.org/10.1016/j.energy.2013.09.057
  11. Liu, H.B., Chen, X.D., Gu, J. (2013b). NOx Reduction Review on Fuel Alternative in Cement Kiln, Advanced Materials Research, 864, 1626-1629. https://doi.org/10.4028/www.scientific.net/AMR.864-867.1626
  12. Rose, D., Brentrup, L. (1995). Effective Emission Reduction when Using Secondary Materials at the Siggenthal Cement Works in Switzerland, Zement-Kalk-Gips, 4, 204-214.
  13. Rozendaal, C.M., Witcamp, J.G., Vliet, H.N., Vissers, A.M.C. (1997). Impact of coal quality and coal blending on NO emissions for two pulverized coal fired unit, Proceedings of the Combined Utility Air Pollutant Control Symposium, Pleasant Hill, CA, USA, 25-29.
  14. Shimizu, T., Sazawa, Y., Adschiri, T., Furusawa, T. (1992). Conversion of char bound nitrogen to nitric oxide during combustion, Fuel, 71, 361-365. https://doi.org/10.1016/0016-2361(92)90022-G
  15. Shreve, R.N., Brink, J.A. (1977). Chemical Process Industries, New York, NY. Fourth Edition, McGraw Hill, Inc.
  16. Walter, L., Greer, G.J.H. (2004). A Qualitative Examination of the Control of Major Gaseous Pollutants Generated in Portland Cement Kilns, Indiana, USA, Portland Cement Association, 33.
  17. Winter, N. (2009). Understanding Cement, WHD Microanalysis Consultants Ltd., Suffolk, 32.
  18. Zeldvich, Y.B. (1946). The Oxidation of Nitrogen in Combustion Explosions, Acta Physicochimica U.S.S.R., 21, 577-628.