Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations

doi:10.1016/j.cjche.2017.03.017

›› 2017, Vol. 25 ›› Issue (8): 1101-1108.DOI: 10.1016/j.cjche.2017.03.017

Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations

Lei Huang¹, Lin Qi¹, Hongna Wang¹, Jinli Zhang^2,3, Xiaoqiang Jia^1,2,3

1 Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 Key Laboratory of Systems Bioengineering(Ministry of Education), Tianjin University, Tianjin 300072, China;
3 SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

收稿日期:2016-09-20 修回日期:2017-01-23 出版日期:2017-08-28 发布日期:2017-09-11
通讯作者: Xiaoqiang Jia
基金资助:
Supported by the National Basic Research Program of China (2014CB745100), the National Natural Science Foundation of China (21576197), Tianjin Research Program of Application Foundation and Advanced Technology (14JCQNJC06700), and Tianjin Penglai 19-3 Oil Spill Accident Compensation Project (19-3 BC2014-03).

Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations

Lei Huang¹, Lin Qi¹, Hongna Wang¹, Jinli Zhang^2,3, Xiaoqiang Jia^1,2,3

1 Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 Key Laboratory of Systems Bioengineering(Ministry of Education), Tianjin University, Tianjin 300072, China;
3 SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received:2016-09-20 Revised:2017-01-23 Online:2017-08-28 Published:2017-09-11
Supported by:
Supported by the National Basic Research Program of China (2014CB745100), the National Natural Science Foundation of China (21576197), Tianjin Research Program of Application Foundation and Advanced Technology (14JCQNJC06700), and Tianjin Penglai 19-3 Oil Spill Accident Compensation Project (19-3 BC2014-03).

摘要/Abstract

摘要： Heat exchangers play an important role in supercritical water coal gasification systems for heating feed and cooling products. However, serious deposition and plugging problems always exist in heat exchangers. CFD modeling was used to simulate the transport characteristics of solid particles in supercritical water through the shell and tube of heat exchangers to alleviate the problems. In this paper, we discuss seven types of exchangers (A, B, C, D, E, F and G), which vary in inlet nozzle configuration, header height, inlet pipe diameter and tube pass distribution. In the modeling, the possibility of deposition in the header was evaluated by accumulated mass of particles; we used the velocity contour of supercritical water (SCW) to evaluate the uniformity of the velocity distribution among the tube passes. Simulation results indicated that the optimum heat exchanger had structure F, which had a rectangular configuration of tube pass distractions, a bottom inlet, a 200-mm header height and a 10-mm inlet pipe diameter.

关键词: Supercritical water, Shell and tube heat exchanger, Particle conveying, Pneumatic transport, CFD simulations, CFX

Abstract: Heat exchangers play an important role in supercritical water coal gasification systems for heating feed and cooling products. However, serious deposition and plugging problems always exist in heat exchangers. CFD modeling was used to simulate the transport characteristics of solid particles in supercritical water through the shell and tube of heat exchangers to alleviate the problems. In this paper, we discuss seven types of exchangers (A, B, C, D, E, F and G), which vary in inlet nozzle configuration, header height, inlet pipe diameter and tube pass distribution. In the modeling, the possibility of deposition in the header was evaluated by accumulated mass of particles; we used the velocity contour of supercritical water (SCW) to evaluate the uniformity of the velocity distribution among the tube passes. Simulation results indicated that the optimum heat exchanger had structure F, which had a rectangular configuration of tube pass distractions, a bottom inlet, a 200-mm header height and a 10-mm inlet pipe diameter.

Key words: Supercritical water, Shell and tube heat exchanger, Particle conveying, Pneumatic transport, CFD simulations, CFX

Lei Huang, Lin Qi, Hongna Wang, Jinli Zhang, Xiaoqiang Jia. Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations[J]. , 2017, 25(8): 1101-1108.

参考文献

[1] M.J. Veraa, A.T. Bell, Effect of alkali metal catalysts on gasification of coal char, Fuel 57(1978) 194-200.
[2] S. Nosé, A molecular dynamics method for simulations in the canonical ensemble, Mol. Phys. 52(1984) 255-268.
[3] W.G. Hoover, Canonical dynamics:Equilibrium phase-space distributions, Phys. Rev. A 31(1985) 1695-1697.
[4] T. Takarada, Y. Tamai, A. Tomita, Reactivities of 34 coals under steam gasification, Fuel 64(1985) 1438-1442.
[5] Z.L. Liu, H.H. Zhu, Steam gasification of coal char using alkali and alkaline-earth metal catalysts, Fuel 65(1986) 1334-1338.
[6] T. Takarada, Y. Tamai, A. Tomita, Effectiveness of K₂CO₃ and Ni as catalysts in steam gasification, Fuel 65(1986) 679-683.
[7] L.Q. Wang, Y.H. Dun, X.N. Xiang, Z.J. Jiao, T.Q. Zhang, Thermodynamics research on hydrogen production from biomass and coal co-gasification with catalyst, Int. J. Hydrog. Energy 36(2011) 11676-11683.
[8] A.A. Vostrikov, S.A. Psarov, D.Y. Dubov, O.N. Fedyaeva, M.Y. Sokol, Kinetics of coal conversion in supercritical water, Energy Fuel 21(2007) 2840-2845.
[9] L. Han, R. Zhang, J. Bi, L. Cheng, Pyrolysis of coal-tar asphaltene in supercritical water, J. Anal. Appl. Pyrolysis 91(2011) 281-287.
[10] S. Wang, Y. Guo, L. Wang, Y. Wang, D. Xu, H. Ma, Supercritical water oxidation of coal:Investigation of operating parameters' effects, reaction kinetics and mechanism, Fuel Process. Technol. 92(2011) 291-297.
[11] L. Guo, H. Jin, Boiling coal in water:Hydrogen production and power generation system with zero net CO₂ emission based on coal and supercritical water gasification, Int. J. Hydrog. Energy 38(2013) 12953-12967.
[12] J. Zhang, X. Weng, Y. Han, W. Li, Z. Gan, J. Gu, Effect of supercritical water on the stability and activity of alkaline carbonate catalysts in coal gasification, J. Energy Chem. 22(2013) 459-467.
[13] P.A. Marrone, G.T. Hong, Corrosion control methods in supercritical water oxidation and gasification processes, J. Supercrit. Fluids 51(2009) 83-103.
[14] M.M. Aslam Bhutta, N. Hayat, M.H. Bashir, A.R. Khan, K.N. Ahmad, S. Khan, CFD applications in various heat exchangers design:A review, Appl. Therm. Eng. 32(2012) 1-12.
[15] M. Brennan, K. Bremhorst, CFD modeling of alumina slurry heat exchanger headers:(ii) Parametric studies, Seventh International Conference on CFD in the Minerals and Process IndustriesCSIRO 2009, pp. 1-6.
[16] M. Kim, Y. Lee, B. Kim, D. Lee, W. Song, CFD modeling of shell-and-tube heat exchanger header for uniform distribution among tubes, Korean J. Chem. Eng. 26(2009) 359-363.
[17] K. Bremhorst, M. Brennan, CFD modelling of alumina slurry heat exchanger headers:(i) Comparison of CFD approaches, Seventh Int. Conf. on CFD in the Minerals and Process IndustriesCSIRO, Melbourne, Australia 2009, pp. 9-11.
[18] H.M. Badr, M.A. Habib, R. Ben-Mansour, S.A.M. Said, S.S. Al-Anizi, Erosion in the tube entrance region of an air-cooled heat exchanger, Int. J. Impact Eng. 32(2006) 1440-1463.
[19] J. Ding, D. Gidaspow, A bubbling fluidization model using kinetic theory of granular flow, AIChE J 36(1990) 523-538.
[20] V. Jiradilok, D. Gidaspow, S. Damronglerd, W.J. Koves, R. Mostofi, Kinetic theory based CFD simulation of turbulent fluidization of FCC particles in a riser, Chem. Eng. Sci. 61(2006) 5544-5559.
[21] Y. Lu, L. Guo, C. Ji, X. Zhang, X. Hao, Q. Yan, Hydrogen production by biomass gasification in supercritical water:A parametric study, Int. J. Hydrog. Energy 31(2006) 822-831.
[22] D. Gidaspow, Multiphase Flow and Fluidization:Continuum and Kinetic Theory Descriptions, Academic Press, San Diego, CA, (1994) 467.
[23] N. Yang, W. Wang, W. Ge, L. Wang, J. Li, Simulation of heterogeneous structure in a circulating fluidized-bed riser by combining the two-fluid model with the EMMS approach, Ind. Eng. Chem. Res. 43(2004) 5548-5561.
[24] W. Wagner, A. Kruse, H.-J. Kurtzschmar, Properties of Water and Steam:The Industrial Standard IAPWS-IF97 for the Thermodynamic Properties and Supplementary Equations for Other Properties:Tables Based on These Equations, Springer-Verlag, Berlin, 1998.
[25] J. Serin, J. Mercadier, F. Marias, P. Cezac, F. Cansell, Use of CFD for the design of injectors for supercritical water oxidation, Proceedings of the 10th European Meeting on Supercritical Fluids:Reactions, Materials and Natural Products Processing, Colmar, France, 2005.
[26] T. Yoshida, Y. Matsumura, Reactor development for supercritical water gasification of 4.9 wt% glucose solution at 673 K by using computational fluid dynamics, Ind. Eng. Chem. Res. 48(2009) 8381-8386.
[27] M.L. de Bertodano, Turbulent Bubbly Flow in a Triangular Duct, Ph. D. Thesis, Rensselaer Polytechnic Institute, Troy New York, 1991.
[28] C. Chen, P. Wood, A turbulence closure model for dilute gas-particle flows, Can. J. Chem. Eng. 63(1985) 349-360.
[29] C. Narayanan, C. Frouzakis, K. Boulouchos, K. Príkopský, B. Wellig, P. Rudolf von Rohr, Numerical modelling of a supercritical water oxidation reactor containing a hydrothermal flame, J. Supercrit. Fluids 46(2008) 149-155.
[30] X. Zhou, J. Gao, C. Xu, X. Lan, Effect of wall boundary condition on CFD simulation of CFB risers, Particuology 11(2013) 556-565.
[31] D. Elvery, K. Bremhorst, Erosion-corrosion due to inclined flow into heat exchanger tubes-investigation of flow field, Proceedings of the ASME Fluids Engineering Division Summer Meeting, San Diego, California, USA July, 1996, pp. 7-11.

Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations

Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations

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