Emission characteristics of co-combustion of a low calorie and high-sulfur-lignite coal and woodchips in a circulating fluidized bed combustor: Part 2. Effect of secondary air and its location

Varol, Murat; Atimtay, Aysel T.; Olgun, Hayati

doi:10.1016/j.fuel.2014.04.002

Cited by 39 publications

(23 citation statements)

References 12 publications

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“…The results showed that the axial temperature increased with the secondary air ratio in the lower region of the combustor while no significant effect was observed at the upper region of the combustor. This finding agreed with results obtained in [8], [32]. This observation can be explained by the decrease in the convection loss and increase in the residence time.…”

Section: Utp-ump Ses 2015supporting

confidence: 93%

An Experimental Study on Axial Temperature Distribution of Combustion of Dewatered Poultry Sludge in Fluidized bed combustor

Abbas

Sulaiman

Aris

2016

MATEC Web of Conferences

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Abstract.A laboratory scale bubbling fluidized bed combustor was designed and fabricated to study the combustion of dewatered poultry sludge at different operational parameters. This paper present a study on the influence of equivalent ratio, secondary to primary air ratio and the fuel feed rate on the temperature distribution along the combustor. The equivalent ratio has been changed between 0.8 to 1.4% under poultry sludge feed rate of 10 kg/h and from 0.8 to 1 under poultry sludge feed rate of 15 kg/h. The secondary to primary air ratio was varied from 0.1 to 0.5 at 0.65 m injection height and 1.25 equivalent ratio. The results showed that these factors had a significant influence on the combustion characteristics of poultry sludge. The temperature distribution along the combustor was found to be strongly dependent on the fuel feed rate and the equivalent ratio and it increased when these two factors increased. However, the secondary air ratio increased the temperature in the lower region of the combustor while no significant effect was observed at the upper region of the combustor. The results suggested that the poultry sludge can be used as a fuel with high thermal combustor efficiency.

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Section: Utp-ump Ses 2015supporting

confidence: 93%

An Experimental Study on Axial Temperature Distribution of Combustion of Dewatered Poultry Sludge in Fluidized bed combustor

Abbas

Sulaiman

Aris

2016

MATEC Web of Conferences

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“…Therefore, it will be wise to use lignite and biomass sources together in energy production with a suitable cofiring technology. A suitable technology for burning low calorie, high ash, and high sulfur fuels with biomass will be the fluidized bed or pulverized coal combustion technology . Biomass cofiring has the potential to reduce emissions from coal‐fired power plants, and it is more environmentally friendly than coal firing.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Turkey is a rich country in lignite resources. 2,3 Turkey's proved recoverable lignite reserves were 14 billion tons in 2015. The calorific values of these lignites are generally medium and low.…”

Section: Introductionmentioning

confidence: 99%

“…A suitable technology for burning low calorie, high ash, and high sulfur fuels with biomass will be the fluidized bed or pulverized coal combustion technology. 2,3 Biomass cofiring has the potential to reduce emissions from coal-fired power plants, and it is more environmentally friendly than coal firing. Contribution of biomass to emission reduction in cofiring with coal is limited with their structures.…”

Section: Introductionmentioning

confidence: 99%

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Torrefaction of pine wood in a continuous system and optimization of torrefaction conditions

et al. 2018

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Summary Red pine wood particles were torrefied in a screw conveyor reactor system continuously having a capacity of 5 kg/hour. During torrefaction, operating conditions were very important. Changes in the reactor temperature and the reactor residence times had large influences on product yields. With increasing torrefaction temperature, the volatile matter and oxygen content of biomass decreased, while fixed carbon content and heating value greatly increased. Design‐Expert software package was used for the design of experiments (DOE) and to carry out the statistical analysis according to the experimental results. The optimum biocoal yield of 56.59%, energy yield of 47.49%, higher heating value of 26 761.9 kJ/kg, hardgrove grindability index of 91.76, H/C ratio of 0.099, and O/C ratio of 0.312 were obtained at 299.71°C and 28.4 minutes (approximately 300°C and 30 minutes). The biocoal prepared in this work exhibited similar properties to selected Turkish lignites. It suggests that the biocoal can be used as a supplementary fuel for production of energy in coal‐fired combustion systems, especially as an auxiliary fuel for existing power plants.

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“…Gaseous emissions of major pollutants (CO, NO X , and SO 2 ) during co-firing were studied. Varol et al (2014) tested co-firing of Turkish lignites and wood chips in a circulating bed combustor and investigated changes in emissions of CO, NO, and SO 2 as a function of excess air ratio. Leckner et al (2004) studied co-combustion of sewage sludge and coal/wood in two circulating fluidized bed (CFB) units, a laboratory scale plant and a pilot scale CFB boiler respectively.…”

Section: Introductionmentioning

confidence: 99%

Co-combustion of tannery sludge in a commercial circulating fluidized bed boiler

et al. 2015

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Emission characteristics of co-combustion of a low calorie and high-sulfur-lignite coal and woodchips in a circulating fluidized bed combustor: Part 2. Effect of secondary air and its location

Cited by 39 publications

References 12 publications

An Experimental Study on Axial Temperature Distribution of Combustion of Dewatered Poultry Sludge in Fluidized bed combustor

An Experimental Study on Axial Temperature Distribution of Combustion of Dewatered Poultry Sludge in Fluidized bed combustor

Torrefaction of pine wood in a continuous system and optimization of torrefaction conditions

Co-combustion of tannery sludge in a commercial circulating fluidized bed boiler

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