Evaluation of the combustion behaviour and ash characteristics of biomass waste derived fuels, pine and coal in a drop tube furnace

Wang, Gongliang; Silva, R.B.; Azevedo, J. L. T.; Dias, Sandra; Costa, Mário

doi:10.1016/j.fuel.2013.09.080

Cited by 86 publications

(53 citation statements)

References 42 publications

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“…The hot junction was installed and supported on 250 lm wires of the same material located in a twin-bore alumina sheath with an external diameter of 5 mm. The temperature measured with an exposed thermocouple is the gas temperature biased by the furnace wall temperature so that the ''true'' temperature was estimated based on an energy balance on the thermocouple bead [12]. It was estimated that the measured gas temperature will not exceed the ''true'' gas temperature by more than 20°C.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Particle sampling along the DTF axis was performed with the aid of a 1.5 m long, water-cooled, nitrogen-quenched stainless steel probe [12]. The probe (see Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Fig. 1 shows a schematic of the DTF used in this study, which is described in greater detail elsewhere [11,12]. The combustion chamber of the DTF is an electrically heated ceramic tube with an inner diameter of 38 mm and a length of 1.3 m. The furnace wall temperatures are continuously monitored by eight type-K thermocouples uniformly distributed along the combustion chamber.…”

Section: Introductionmentioning

confidence: 99%

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Particle fragmentation of raw and torrefied biomass during combustion in a drop tube furnace

Costa

2015

Fuel

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Section: Experimental Methodsmentioning

confidence: 99%

“…Particle sampling along the DTF axis was performed with the aid of a 1.5 m long, water-cooled, nitrogen-quenched stainless steel probe [12]. The probe (see Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Particle fragmentation of raw and torrefied biomass during combustion in a drop tube furnace

Costa

2015

Fuel

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“…Devolatilisation was modeled by the single rate devolatilisation model given in equation 7 and 8. The rate constants for coal and RDF were taken from (Badzioch and Hawksley, 1970) and (Wang et al, 2014), respectively.…”

Section: Theorymentioning

confidence: 99%

“…The rate constant for coal was used as in (Baum and Street, 1971) and (Field, 1969). The rate constant for RDF was taken from (Wang et al, 2014).…”

Section: Theorymentioning

confidence: 99%

Numerical modeling of the calcination process in a cement kiln system

Kahawalage

Melaaen

Tokheim

2017

Linköping Electronic Conference Proceedings

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The calcium carbonate decomposition into calcium oxide and carbon dioxide is a key process step in a cement kiln. The reaction requires thermal energy input, and pulverized coal is the fuel typically used for this purpose in the cement industry. Coal can in many cases be replaced by different types of alternative fuels, but this may impact process conditions, emissions or product quality. In this study, CFD simulations were carried out to investigate the possibility to replace 50 % of the coal by refuse derived fuel (RDF). The spatial distribution of gas and particle temperatures and concentrations were calculated, and the simulations indicated that replacement of coal by RDF resulted in a reduction of fuel burnout, lower gas temperatures and a lower degree of calcination.

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Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

et al. 2019

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The cement industry is one of the largest pollutant emitters. One way to cope with high pollutant emissions is to co‐combust biomass with pulverized coal. A mathematical model was developed, which is detailed enough to consider the complex physical and chemical behavior of the co‐combustion process but simple enough to perform simulations with a real geometry of cement rotary kiln within reasonable time. Numerical simulation with a 20‐% share of pulverized biomass of total fuel heating value was performed. An industrial rotary kiln geometry was simulated; temperature and velocity fields along with mass fractions of released volatiles and combustion products were analyzed. The model allows better insights in the co‐firing process with the main goal to reduce CO2 emissions by optimizing the combustion process inside the rotary kiln.

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Evaluation of the combustion behaviour and ash characteristics of biomass waste derived fuels, pine and coal in a drop tube furnace

Cited by 86 publications

References 42 publications

Particle fragmentation of raw and torrefied biomass during combustion in a drop tube furnace

Particle fragmentation of raw and torrefied biomass during combustion in a drop tube furnace

Numerical modeling of the calcination process in a cement kiln system

Improving Pulverized Coal and Biomass Co‐Combustion in a Cement Rotary Kiln by Computational Fluid Dynamics

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