석탄 보일러에서 회분 부착성향 예측 접근 방법에 대한 고찰 = Consideration on the Prediction Approach of Ash Deposition Propensity in Coal-fired Boilers

다국어 초록 (Multilingual Abstract)

Various approaches have been proposed to predict the ash deposition (slagging and fouling) propensity of coal, which is essential in maintaining high efficiency and preventing corrosion/damage of a coal-fired boiler. The common method is to establish an index of the ash deposition propensity based on elementary coal composition and advanced characterization of ash properties, which is readily applicable to design, operation and maintenance of coal-fired boilers. Although many indexes have been developed for this purpose, their validity is still not satisfactory in actual applications to particular coal types or operating conditions. This paper reviews the status of predictive approaches for the ash deposition propensity, and assesses the performance of existing indexes by comparing the results for selected coals. This work will contribute to the development of a comprehensive and practical method for prediction of the ash deposition propensity.

참고문헌 (Reference)

1 이현동, "인도네시아산 발전용 수입 석탄 2종의 연소특성 비교 평가" 한국에너지학회 19 (19): 136-142, 2010

2 J.D. Watt, "The Flow Properties of Slags Formed from the Ashes of British Coals: Part 1Viscosity of Homogeneous Liquid Clags in Relation to Slag Composition" 42 : 99-103, 1969

3 K.J. An, "Study on Slagging Characteristics of Hybrid Coals using the Thermo-mechanical Analysis" 59-61, 2013

4 B.P. Lim, "Studies of Rate of Ash Deposit of Various Coals for Analysis of IGCC Fouling Effect" 61-66, 2000

5 A. F. Stam, "Review of Models and Tools for Slagging and Fouling Prediction for Biomass Co-combustion"

6 S.H. Lee, "Prediction of Slagging Propensity of Coal Ash" 4 (4): 42-51, 1995

7 L.Y. Huang, "Prediction of Ash Deposition on Superheater Tubes from Pulverized Coal Combustion" 75 (75): 271-279, 1996

8 K. Jang, "Prediction of Ash Deposition Propensity in a Pilot-scaled Pulverized Coal Combustion" 87-90, 2013

9 B.C. Choi, "Phase Equilibrium Analysis of Slagging Propensity of Coal Ash in Combustion/Gasification Environments" 75-81, 1999

10 B.P. Lim, "Numerical Model of Ash Deposition Behavior in the Bench Scale Entrained-bed Gasifier with DTF(Drop Tube Furnace)" 25-32, 2001

11 S.K. Knudsen, "Numerical Investigation of Ash Deposition in Straw-fired Boilers- Using CFD as the Framework for Slagging and Fouling Predictions" Technology Institute of Energy, University of Aalborg 2001

12 F.C.C. Lee, "Modelling Ash Deposition in Pulverized Coal-fired Applications" 25 : 117-132, 1999

13 H. Wang, "Modeling of Ash Deposition in Large-scale Combustion Facilities Burning Pulverized Coal" 23 : 267-282, 1997

14 T. R. Bott, "Inorganic Transformations and Ash Deposition during Combustion" United Engineering Trustees Inc. 1992

15 Y.S. Kim, "Influence of Bituminous Coal Characteristics on Thermal Utility Boiler Design" 137-156, 2002

16 B.J. Jung, "High Temperature Viscosity Measurement of Coal Ash Slags in Oxidizing Atmosphere" 4 (4): 324-330, 1995

17 R.W. Bryers, "Firing Slagging, Fouling, and Hightemperature Corrosion of Heat-transfer Surface due to Impurities in Stream-raising Fuels" 29 : 29-120, 1996

18 T. Moskal, "Economic Consequences of Boiler Cheanning Effectiveness" Diamond Power International 1998

19 J.G. Singer, "Combustion, Fossil Power Systems:A Reference Book on Fuel Burning and Steam Generation" Combustion Engineering 1981

20 N. Mendes, "Characterization and Growth Modeling of Ash Deposits in Coal Fired Boilers" 217 : 61-68, 2012

21 B. Jung, "Characteristics of Coal Ash Melting in Bench Scale Entrained Coal Gasifier" 8 (8): 127-136, 1999

22 K. Kang, "An Experimental Study on Slagging/Fouling Characteristics for Various Coals in a 50kWth Pulverized Coal Combustion System" 107-109, 2012

23 H.Y. Park, "Advanced Slagging Propensity of Coal and its Assessment with the Conventional Indices" 21 (21): 427-434, 2012

24 B.C. Choi, "A Study on the Slagging Behavior with Various Composition of Coal Ash" 8 (8): 445-451, 1999

25 S.W. Chung, "A Study on the Slagging Behavior of Coal Ash in Gasifier using DTF" 4 (4): 203-213, 1994

26 A. Lawrence, "A Novel Tool for Assessing Slagging Propensity of Coals in PF Boilers" 87 : 946-950, 2008

27 Z. Ma, "A Comprehensive Slagging and Fouling Frediction Tool for Coal-fired Boilers and its Validation/application" 88 : 1035-1043, 2007

28 황민영, "500MW급 화력발전 보일러의 석탄회 연소 시뮬레이션" 대한기계학회 35 (35): 939-946, 2011

29 홍정우, "4-Layer Slagging Model을 적용한 300MW급 Shell형 1단 분류층 석탄 가스화기 전산수치해석" 한국연소학회 17 (17): 1-11, 2012