Characterisation of Biomass and Coal Co-Firing on a 3 MWth Combustion Test Facility using Flame Imaging and Gas/Ash Sampling Techniques

Molcan, Peter and Lu, Gang and Le Bris, Thomas and Yan, Yong and Taupin, Benoit and Caillat, Sebastien (2009) Characterisation of Biomass and Coal Co-Firing on a 3 MWth Combustion Test Facility using Flame Imaging and Gas/Ash Sampling Techniques. Fuel, 88 (12). pp. 2328-2334. ISSN 0016-2361. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Co-firing of biomass with pulverised coal at existing coal power stations remains a practical option available to power plant operators and is being widely adopted as one of the main technologies for reducing greenhouse gas emissions. However, there is a range of technological problems that are not well undersood. This paper presents experimental investigations into the co-firing of pulverised coal directly co-milled with 5-20% biomass on a 3 MWth Combustion Test Facility. A number of combustion paramters, including flame temperature and oscillation frequency and particle size distribution, were measured under a range of co-firing conditions. The gas species within the flame and fly ash in flue gas were also sampled and analysed. The experimental data collected are used to study the impact of biomass additions to pulverised coal on the combustion characteristics of the co-firing process. The relationships between the flame characteristics, gas species and ash deposition of the furnace are investigated. The results suggest that, due to the varying physical and chemical properties of the biomass fuels, the biomass additions have impact on the combuystion characteristics in a very complicated way. It has been found that the bio-mass addition to coal would improve the combustion efficiency because of the lower CO concentrations and high char burnout level in co-firing. In addition, NOx emission has been found closely linked to the flame stability, and SOx emission reduced in general for all co-firing cases.

Item Type: Article
Uncontrolled keywords: Co-firing, Biomass, Pulverised coal, Flame temperature
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA166 Instrumentation
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: J. Harries
Date Deposited: 14 Apr 2010 14:11
Last Modified: 29 May 2014 13:25
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