The influence of burner injection mode on pulverized coal and biomass co-fired flames

Abbas, Tahir; Costen, P.; Kandamby, Naminda; Lockwood, F.C.; Ou, J.J.

doi:10.1016/0010-2180(94)90055-8

Cited by 60 publications

(33 citation statements)

References 4 publications

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“…Various options such as hoppers or lock hoppers, screw feeders (Dai, 2007), conveyor belts (Abbas et al, 1994), and pneumatic feeding systems (Tmej and Haselbacher, 2000;Sami et al, 2001;Dai, 2007), have proved to be suitable for different kinds of biomass. The feeding system should be designed to handle the specific fuel flow properties.…”

Section: Handling and Feeding Of Biomassmentioning

confidence: 99%

Overview and some issues related to co‐firing biomass and coal

et al. 2008

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Low heating values, variable chemical compositions, peculiar physical properties, high investment cost and insecurity of biomass feedstocks supply limit the applications of biomass for energy and other processes. Co-firing biomass and coal has potential for the development of biomass-to-energy capacity with significant economic, environmental, and social benefits. However, co-firing is not straightforward, and some questions need to be addressed due to the differences in chemical compositions and physical properties of biomass and coal. This paper highlights key issues related to co-firing, including reactor types, feeding, hydrodynamics, ash sintering, fouling, and corrosion, based on previous studies, as well as calculations and analysis. Direct co-firing is the most common option for biomass and coal co-firing currently, mostly due to relatively low investment needed to turn existing coal power plants into co-firing plants. For direct co-firing, the physical characteristics and chemical compositions of the fuel entering the combustors or gasifiers are critical to an optimum operation. Any biomass mixed with coal needs to have acceptable physical properties. More research is needed on co-firing biomass and coal, including work on: preparation, handling, storage, and feeding of biomass feedstocks (e.g. drying, torrefaction, pelletization); co-firing mechanisms; hydrodynamic analysis of co-firing combustors and gasifiers; boiler/gasifier capacity, slagging, fouling, corrosion, efficiency, reliability, fuel flexibility; lower emissions and gas cleaning; catalyst poisoning; investment and operating costs.Les applications de la biomasse pour les procédésénergétiques et d'autres procédés sont limités par les faibles pouvoirs calorifiques, des compositions chimiques variables, des propriétés physiques particulières, des coûts d'investissementélevés et l'insécurité quantà l'approvisionnement en biomasse comme matière première. La co-alimentation biomasse-charbon est potentiellement intéressante pour la transformation de la biomasse enénergie, avec des avantageséconomiques, environnementaux et sociaux significatifs. Toutefois, la co-alimentation n'est pas simple et certaines questions se posent du fait des différences dans les compositions chimiques et les propriétés physiques de la biomasse et du charbon. On souligne dans cet article les principaux aspects entrant dans la co-alimentation, notamment le type de réacteurs, l'alimentation, l'hydrodynamique, le frittage des cendres, l'encrassement et la corrosion, d'après desétudes antérieures ainsi que des calculs et analyses. La co-alimentation directe est l'option la plus commune pour la co-alimentation biomasse-charbon, principalement en raison de l'investissement relativement faible requis pour transformer les centralesélectriques alimentées au charbon actuelles en centrales hybrides. Pour la co-alimentation directe, les caractéristiques physiques et les compositions chimiques du fioul entrant dans les chambres de combustion et les gazéifieurs sont critiques pour un fo...

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Section: Handling and Feeding Of Biomassmentioning

confidence: 99%

Overview and some issues related to co‐firing biomass and coal

et al. 2008

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“…2 Experimental studies of biomass combustion or biomass/coal co-firing in well-defined laboratory burner reactors have been reported in the literature, which mainly focus on the overall combustion characteristics of various biomass flames or cofiring flames. For instance, the share and injection mode of biomass and design and operation of burners were found to have significant effects on flame ignition, combustion aerodynamics, and NO x emissions, 3 on NO x emissions, 4 on flame structure and emissions, 5,6 and on flame stability. 7 There are also some fundamental studies with focus on reactivity and conversion of single biomass particles or biomass char.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Effects of Particle Shape and Operating Conditions on Combustion Characteristics of Single Biomass Particles

et al. 2012

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An experimental study is performed to investigate the ignition, devolatilization, and burnout of single biomass particles of various shapes and sizes under process conditions that are similar to those in an industrial combustor. A chargecoupled device (CCD) camera is used to record the whole combustion process. For the particles with similar volume (mass), cylindrical particles are found to lose mass faster than spherical particles and the burnout time is shortened by increasing the particle aspect ratio (surface area). The conversion times of cylindrical particles with almost the same surface area/volume ratio are very close to each other. The ignition, devolatilization, and burnout times of cylindrical particles are also affected by the oxidizer temperature and oxygen concentration, in which the oxygen concentration is found to have a more pronounced effect on the conversion times at lower oxidizer temperatures.

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“…Based on the literature (Abbas et al, 1994;Van Doorn et al, 1996) it was found out that the content of volatile particles at the level of 15-30±0.3 p by weight and the elemental carbon content 80-90±0.3 by weight in the biomass results in the higher value of heat of combustion. Such content of volatile particles was obtained in biochar obtained within the temperature of pyrolysis of 300-450 o C.…”

Section: Results Of Elementary and Technical Analysismentioning

confidence: 99%

“…Biomass combustion is one of the methods, which may be used regardless the location on account of energy biomass variability and its availability (Demirbas, 2005). The biomass combustion consists in the use of existing organic waste from other industry branches such as: paper (Singh et al, 2000), wood chips (Sampson et al, 1991), sawdust and sewage (Abbas et al, 1994), proso millet (Aerts et al, 1997), straw (Denisiuk, 2006), nutshell (Rozwadowski et al, 2012) and other waste material (Abbas et al, 1994). The greatest advantage of such a solution is, inter alia, reduced emission of CO 2 and practically no emission of sulphur oxide and nitrogen oxide and chem-ical composition which has a similar quality to traditional fuels (Hein and Bemtgen, 1998;Easterly and Burnham, 1996).…”

Section: Introductionmentioning

confidence: 99%

Impact of the Temperature of Waste Biomass Py-Rolysis on the Quality of the Obtained Biochar

Marczak

Karczewski

Makowska

et al. 2016

Agricultural Engineering

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Combustion and co-combustion of biomass from different sources is one of the most popular technologies applied in Poland. It allows management of numerous industrial, communal and agricultural waste. Organic waste constitutes one of the richest sources of cheap biomass solid fuels since they are very popular. The paper includes an assessment of practical use of biomass waste: hazelnut shell and pistachio nut shell. The impact of pyrolysis temperature (300, 450 and 550ºC) of the investigated biomass on the quality of the obtained biochar was determined and the optimal temperature of this process was defined. The quality of the investigated biomass was analysed on account of its use for energy purposes. Numerous advantageous properties of the obtained materials were found out, for instance: low content of ash and a noticeable increase of the calorific value with an increase of the pyrolysis temperature.

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The influence of burner injection mode on pulverized coal and biomass co-fired flames

Cited by 60 publications

References 4 publications

Overview and some issues related to co‐firing biomass and coal

Overview and some issues related to co‐firing biomass and coal

Experimental Study on Effects of Particle Shape and Operating Conditions on Combustion Characteristics of Single Biomass Particles

Impact of the Temperature of Waste Biomass Py-Rolysis on the Quality of the Obtained Biochar

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