Numerical Study Effect of Secondary Air Mass Flow to Characteristics of Circulating Fluidized Bed Boiler

Ahmad Tarmizi, Giri Nugroho, Achmad Syaifudi, Bambang Sudarmanta

Abstract


In this paper, computational study of Circulating Fluidized Bed (CFB) combustion is analyzed. The results are concern about volume fraction and velocity distribution along the boiler. Simulation result were present in velocity, volume fraction, and pressure profile in boiler. All discussed result are applicable to all type of fluidized bed boiler.

This paper will concern about how fluidization and combustion occur in boiler. Simulation present in unsteady state, multiphase direction, k-ε standard turbulence model, species transport combustion model and DPM. In this simulation, fuel, air, and other input materials are defined by actual data from power plant operation. As a result of analysis, the variation of secondary air does affect the characteristics of fluidization and combustion in CFB system. The superficial velocity is found around 4.1 m/s. The pressure generated is about 6642.3 Pa in the windbox area, and in the middle furnace area about -868.6 Pa

Keywords


Circulating Fluidized Bed Boiler; Secondary Air Mass Flow; Fluidization; Multiphase

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References


Direktorat Jenderal Ketenagalistrikan, Statistik Ketenagalistrikan 2015. Jakarta: Direktorat Jenderal Ketenagalistrikan, 2016.

P. Basu, Circulating Fluidized Bed Boilers. Cham: Springer International Publishing, 2015.

Pandey K. M and R. Kumar, “Numerical Analysis of Coal Combustion in Circulating Fluidized Bed,” Int. J. Chem. Eng. Appl., vol. 2, no. 6, pp. 390–394, 2011.

B. Sudarmanta, “Dual fuel engine performance using biodiesel and syn-gas from rice husk downdraft gasification fo power generation,” in International Seminar on Sustainable Biomass Production and Utilization: Challenges and Opportunities, 2015.

N. Zhang, B. Lu, W. Wang, and J. Li, “3D CFD simulation of hydrodynamics of a 150 MWe circulating fluidized bed boiler,” Chem. Eng. J., vol. 162, no. 2, pp. 821–828, Aug. 2010.

PJB Services, TOR Simulasi CFD PLTU Bangka. Sidoarjo.

UNEP, “Biomass Fired FBC Boiler for Cogeneration.”




DOI: http://dx.doi.org/10.12962/j23546026.y2018i1.3525

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