Research Papers: Energy Conversion/Systems

A Compartmental Model for Supercritical Coal-Fired Boiler Systems

[+] Author and Article Information
Longzhou Qi, Shuhong Huang, Xing Xu, Yu Li, Yong Wang

College of Energy and Power Engineering,
Huazhong University of Science & Technology,
Wuhan 430074, China

Yanping Zhang

College of Energy and Power Engineering,
Huazhong University of Science & Technology,
Wuhan 430074, China
e-mail: zyp2817@hust.edu.cn

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received December 2, 2012; final manuscript received August 19, 2013; published online January 15, 2014. Assoc. Editor: Muhammad Mustafizur Rahman.

J. Energy Resour. Technol 136(2), 021602 (Jan 15, 2014) (7 pages) Paper No: JERT-12-1276; doi: 10.1115/1.4025959 History: Received December 02, 2012; Revised August 19, 2013

A compartmental furnace model for supercritical coal-fired boiler systems is presented in this paper. Instead of the traditional lumped parameter method, the furnace is divided to seven compartments along the height based on the positions of the burner groups. The lower six compartments correspond to the six groups of burners, respectively. This model provides the possibility to connect the pulverization system and the furnace, the variability of the combustion property caused by changes of the pulverization system can be studied by switching the operating conditions. To evaluate the proposed model, simulation results are compared with available data from a 600 MW supercritical coal-fired boiler and reasonably good agreement is achieved. The simulation results also show that the compartmental model features a better precision than the lumped parameter modeling. This model allows for evaluating different control strategies and subsequently proposing optimization strategies for boiler system operation.

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Fig. 1

The Schematic representation of the four corners tangentially fired boiler and the compartments of furnace

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Fig. 2

The schematic plot of the model of each mill and corresponding compartment

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Fig. 3

The schematic plot of the connection of the total model

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Fig. 4

Response curve of mill capacity under different operation conditions

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Fig. 5

Response curve of outlet temperature under different operation conditions

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Fig. 6

The temperature distribution in the furnace at different loads




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