Browse > Article
http://dx.doi.org/10.9713/kcer.2014.52.5.592

Linear Model Predictive Control of an Entrained-flow Gasifier for an IGCC Power Plant  

Lee, Hyojin (Department of Biomolecular and Chemical Engineering, Korea Advanced Institute of Science and Technology)
Lee, Jay H. (Department of Biomolecular and Chemical Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
Korean Chemical Engineering Research / v.52, no.5, 2014 , pp. 592-602 More about this Journal
Abstract
In the Integrated Gasification Combined Cycle (IGCC), the stability of the gasifier has strong influences on the rest of the plant as it supplies the feed to the rest of the power generation system. In order to ensure a safe and stable operation of the entrained-flow gasifier and for protection of the gasifier wall from the high internal temperature, the solid slag layer thickness should be regulated tightly but its control is hampered by the lack of on-line measurement for it. In this study, a previously published dynamic simulation model of a Shell-type gasifier is reproduced and two different linear model predictive control strategies are simulated and compared for multivariable control of the entrained-flow gasifier. The first approach is to control a measured secondary variable as a surrogate to the unmeasured slag thickness. The control results of this approach depended strongly on the unmeasured disturbance type. In other words, the slag thickness could not be controlled tightly for a certain type of unmeasured disturbance. The second approach is to estimate the unmeasured slag thickness through the Kalman filter and to use the estimate to predict and control the slag thickness directly. Using the second approach, the slag thickness could be controlled well regardless of the type of unmeasured disturbances.
Keywords
IGCC; Gasifier; Slag; MPC; Inferential Control;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Seyab, A. and Cao, Y., "Nonlinear Model Predictive Control for the ALSTOM Gasifier," Journal of Process Control, 16(8), 795-808(2006).   DOI   ScienceOn
2 Bittanti, S., Calloni, L., Canevese, S., Marco and A., Prandoni, V., "A Clean-coal Control Technology Application Study: Modelling and Control Issues for a Coal Gasifier," 7th IFAC International Symposium on Advanced Control of Chemical Processes, Turkey(2009).
3 Muske, K. and Badgwell, T., "Disturbance Modeling for Offsetfree Linear Model Predictive Control," Journal of Process Control, 12(5), 617-632(2002).   DOI   ScienceOn
4 Bemporad, A., Morari, M. and Ricker, N. L., "Model Predictive Control Toolbox User's Guide," The MathWorks Inc., Natick, MA(2012).
5 Yeu, J., Kim, W., Im, J., Lee, D. and Jee, G., "Obstacle Parameter Modeling for Model Predictive Control of Unmanned Vehicle," Journal of Institute of Control, Robotics and Systems, 18(12), 1132-1138(2012).   과학기술학회마을   DOI
6 Wen, C. Y. and Chaung, T. Z., "Entrained Coal Gasifier Modeling," Ind. Eng. Chem. Process Des. Dev., 18(4), 684-695(1979).   DOI   ScienceOn
7 Valero A. and Uson S., "Oxy-co-gasification of Coal and Biomass in an Integrated Gasification Combined Cycle (IGCC) Power Plant," Energy, 31(10-11), 1643-1655(2006).   DOI   ScienceOn
8 Govind, R. and Shah, J., "Modeling and Simulation of An Entrained Flow Coal Gasifier," AIChE J., 30(1), 79-92(1984).   DOI   ScienceOn
9 Robinson, P. J. and Luyben, W., "Simple Dynamic Gasifier Model That Runs in Aspen Dynamics," Ind. Eng. Chem. Res., 47(20), 7784-7792(2008).   DOI   ScienceOn
10 Watanabe, H. and Otaka, M., "Numerical Simulation of Coal Gasification in Entrained Flow Coal Gasifier," Fuel, 85(12-13), 1935-1943(2006).   DOI   ScienceOn
11 Ra, H., Lee, S., Yoon, S., Choi, Y., Kim, J. and Lee, J., "Entrainedflow Coal Water Slurry Gasification," Korean Chem. Eng. Res., 48(2), 129-139(2010).
12 Sun, B., Liu, Y., Chen, X., Zhou, Q. and Su, M., "Dynamic Modeling and Simulation of Shell Gasifier in IGCC," Fuel Process. Technol., 92(8), 1418-1425(2011).   DOI
13 Mongahan, R. and Ghoniem, A, "A dynamic Reduced Order Model for Simulating Entrained Flow Gasifiers PartI: Model Development and Description," Fuel, 91(1), 61-80(2012).   DOI   ScienceOn
14 Park, Y., Moon, J., Lee S., Lee, D. and Jin, G., "The Computeraided Simulation Study on the Gasification Characteristics of the Roto Coal in the Partitioned Fluidized-bed Gasifier," Korean Chem. Eng. Res., 50(3), 511-515(2012).   과학기술학회마을   DOI
15 Gnielinski, V., "New Equation for Heat and Mass Transfer in Turbulent Pipe and Channel Flow," International Chemical Engineering, 16(2), 359-368(1976).
16 Dixon, R., Pike, W. and Donne, S., "The ALSTOM Benchmark Challenge on Gasifier Control," J. Syst. Control Eng., 214(6), 389-394(2000).
17 Mills, K. and Rhine, J., "The measurement and Estimation of the Physical Properties of Slag Formed During Coal Gasification: 2. Properties Relevant to Heat Transfer," Fuel, 68(7), 904-910(1989).   DOI   ScienceOn
18 Schobert, H., Streeter, R. and Diehl, E., "Flow Properties of Low-rank Coal Ash Slags: Implications for Slagging Gasification," Fuel, 64(11), 1611-1617(1985).   DOI   ScienceOn
19 Mills, K. and Keene, B., "Physical Properties of BOS Slags," Int. Mater. Rev., 32(1), 1-120(1987).   DOI
20 Dixon, R., "Benchmark Challenge at Control 2004," Comput. Control Eng. IEE, 10(3), 21-23(2005).
21 Seyab, A., Cao, Y. and Yang, S., "Predictive Control for the ALSTOM Gasifier Problem," IEE Proc.-Control Theory Appl., 153(3), 293-301(2006).   DOI
22 Seggiani, M., "Modelling and Simulation of Time Varying Slag Flow in a Prenflo Entrained-flow Gasifier," Fuel, 77(14), 1611-1621(1998).   DOI   ScienceOn
23 Montagnaro, F. and Salatino, P., "Analysis of Char-slag Interaction and Near-wall Particle Segregation in Entrained-flow Gasification of Coal," Combust. Flame, 157(5), 874-883(2010).   DOI   ScienceOn
24 Massoudi, M. and Wang, P., "Slag Behavior in Gasifiers.PartII: Constitutive Modeling of Slag," Energies, 6(2), 807-838(2013).   DOI
25 Lee, J., "Model Predictive Control: Review of the Three Decades of Development," International Journal of Control, Automation, and Systems, 9(3), 415-424(2011).   DOI
26 Phillips, J., "CoalFleet RD&D Augmentation Plan for Integrated Gasification Combined Cycle(IGCC) Power Plants," EPRI, Palo Alto, CA(2006).
27 "2010 Worldwide gasification database," US Department of Energy's National Energy Technology Laboratory(2010).
28 Paek, M., "300MW IGCC Gasification Plant Engineering and Technology Development Status," Green Energy International Business Conference, Daegu, Korea(2011).
29 "The 6th basic plan on electricity demand," Ministry of knowledge economy of Korea government, Korea(2013).
30 Rao, A., "Combined cycle systems for near-zero emission power generation," Woodhead Publishing(2012).
31 Lee, J. W., Park, S., Seo, H., Kim, M., Kim, S., Chi, J. and Kim, K., "Effects of Burner Type on a Bench-scale Entrained Flow Gasifier and Conceptual Modeling of the System with Aspen Plus," Korean J. Chem. Eng., 29(5), 574-582(2012).   과학기술학회마을   DOI   ScienceOn