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Research Papers

Options for Biomass Utilization in Coal Fired Power Stations

[+] Author and Article Information
Amir Tadros1

 Aurecon, Neutral Bay, New South Wales 2089, Australiaa.tadros@unswalumni.com

Rodney Boyd

 Aurecon, Neutral Bay, New South Wales 2089, Australiaboydr@ap.aurecongroup.com

Peter Benyon

 Aurecon, Neutral Bay, New South Wales 2089, Australiabenyonp@ap.aurecongroup.com

Charles Grima

 Aurecon, Neutral Bay, New South Wales 2089, Australiagrimac@ap.aurecongroup.com

1

Corresponding author.

J. Thermal Sci. Eng. Appl 1(4), 041008 (Jun 24, 2010) (9 pages) doi:10.1115/1.4001805 History: Received December 03, 2009; Revised April 23, 2010; Published June 24, 2010; Online June 24, 2010

This paper summarizes the results of engineering investigations conducted using a variety of computational modeling tools to evaluate different options for cofiring up to 10% (input energy) biomass in an existing large tangentially coal fired boiler. Options investigated included the direct combustion of solid biomass via both existing and auxiliary burners, the external gasification of the solid biomass, and the external combustion of the biomass in an auxiliary boiler. The methodology used, key results, and discussion of the relative features of the options studied are described in this paper.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Plane and elevation views of the considered boiler

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Figure 2

Injection of pulverized biomass into pulverized fuel pipework upstream of existing burners

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Figure 3

Biomass gasification and syngas injection into dedicated gas burners

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Figure 4

Biomass combustion in an auxiliary boiler

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Figure 5

Temperature profiles of solid biomass combustion options for 45% moisture biomass

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Figure 6

Temperature profiles of solid biomass combustion options for 45% moisture biomass

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Figure 7

Basic types of gasification processes

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Figure 8

Furnace temperature contours for coal and syngas for the three cases studied

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Figure 9

Horizontal plane temperature contours

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Figure 10

Reduction in cycle efficiency

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Figure 11

Reduction in CO2 intensity

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