Experimental study on the coexistent dual slagging in biomass-fired furnaces: Alkali- and silicate melt-induced slagging

Niu, Yanqing; Zhu, Yu; Tan, Houzhang; Wang, Xuebin; Suo, Hui; Du, Wenbo

doi:10.1016/j.proci.2014.06.120

Cited by 50 publications

(13 citation statements)

References 15 publications

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“…Pelenų formavimosi ir jų šlakavimosi mechaniz mams pastaraisiais metais skiriamas padidintas dėmesys [17][18][19][20][21][22][23], nes išsamūs duomenys apie šiuos procesus gali gerokai palengvinti agromasės panaudojimą termokonversijos procesuose;…”

Section: įVadasunclassified

Biokuro savybių ir juo kūrenamų mažos bei vidutinės galios įrenginių efektyvumo ir taršos parametrų tyrimai

Pedišius¹,

Praspaliauskas²,

Valantinavičius³

et al. 2016

energetika

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Atlikti mažos galios šildymo katilų, kūrenamų biokuru, efektyvumo ir išmetamų emisijų tyrimai. Tyrimai vykdyti keliais etapais: pirmajame etape buvo eksperimentiškai tiriamos šiuo metu plačiausiai naudojamo biokuro, pagaminto iš biomasės, ir potencialiai perspektyvaus biokuro, pagaminto iš agromasės, savybės siekiant nustatyti, kaip toks kuras turi būti paruošiamas, kad efektyviai sudegtų šildymo įrenginiuose; antrajame etape atlikti oro / degiųjų produktų maišymosi įvairios konstrukcijos šildymo katilų degimo kamerose ir oro / degimo produktų kanaluose skaitiniai, eksperimentiniai tyrimai siekiant užtikrinti tinkamą degimo produktų buvimo laiką karštojoje zonoje ir jų temperatūrą. Šiame darbe taip pat pateikiami kietųjų dalelių (KD) koncentracijos pasiskirstymo degimo produktuose priklausomai nuo jų dydžio tyrimo rezultatai ir KD koncentracijos mažinimo metodų analizė.

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Section: įVadasunclassified

Biokuro savybių ir juo kūrenamų mažos bei vidutinės galios įrenginių efektyvumo ir taršos parametrų tyrimai

Pedišius¹,

Praspaliauskas²,

Valantinavičius³

et al. 2016

energetika

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“…The high potassium content and low alumina content were the reasons for the lower IDT of biomass than that of coal. 7,22,23 Moreover, with the increase of the biomass blending ratio, the content of alumina and potassium in the ash samples changed the most. The content of alumina in the coal ash (20.6 wt %) was much larger than that in the biomass ash (2.2 wt %), while the content of potassium in biomass ash was 26.9 wt %, which was far more than that in the coal ash (1.9 wt %).…”

Section: Resultsmentioning

confidence: 99%

Experiment and Kinetics Studies on Ash Fusion Characteristics of Biomass/Coal Mixtures during Combustion

et al. 2019

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Cofiring of biomass and coal significantly reduces carbon emissions and alleviates ash-related problems of biomass. This study investigates the effect of the biomass/coal blending ratio on ash fusion characteristics through the ash fusion test, X-ray fluorescence, and X-ray diffractometry. Meanwhile, kinetic analysis of the ash fusion process was conducted to provide a new method and reading benchmark for obtaining precise and repeatable initial deformation temperature (IDT). Results showed that the IDT decreased with the increase of the biomass blending ratio because of the decrease of alumina content and the increase of potassium content. When the biomass blending ratio increased, the content of orthoclase and diopside at the low melting point increased, while the content of andalusite, quartz, and anhydrite at the high melting point decreased, resulting in the decline of IDT. Kinetic analysis indicated that with increasing biomass blending ratio, the activation energy of ash fusion reaction decreased, which is the essential reason for the decrease of IDT. Coal ash had an activation energy of 1144.67 kJ·mol–1, while it decreased to 145.89 kJ·mol–1 with an increased biomass blending ratio to 100%. Compared with the larger error (up to 60 °C) caused by visual reading on the morphological change of the triangle ash cone, kinetics calculation gave precise prediction with less error between 2 and 7 °C. As an optimal recommendation, the average shrinkage rate of height at 41% could be used as a reading benchmark for the determination of IDT in further study.

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“…10). Furthermore, its reduction (or disappearance) in the diffraction intensities in bottom ash can be explained with the volatilization and silication of KCl, [34,35] which for some samples is not complete and still appears in the bottom ash. On the other hand, KCl present in y ash is mostly attributed to condensation of gaseous KCl (derived from K and Cl volatilization and recombination) over existing ash.…”

Section: Phase Compositionmentioning

confidence: 99%

Effect Of Exhausted Olive Cake Contamination On Fly And Bottom Ash In Power Plants

Pazo

Lapuerta

Acosta

et al. 2021

Preprint

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With the aim to prevent possible power plant malfunction due to the feedstock properties and suggest possible ash applications, feedstock samples and bottom and fly ash samples collected along more than a year in a 16 MW suspension-fired boiler power plant, fed mainly with pulverized exhausted olive cake (orujillo), were studied. A detailed characterization of fly and bottom ash has been done, as well as a seasonal evolution study. Altogether in order to find any trend on the ash composition changes and to study the relationship between ash (both fly and bottom fractions) and, on the one hand, the feedstock composition, and on the other hand, the troublesome deposit formation. A relationship between deposit growth and higher Cl and Na content in the feedstock has been noticed, showing the need for some control on these feedstock’s components. The high Cl and Na content is attributed to external contamination. Furthermore, the high Al content in the feedstock and the strong relationship between Al, Fe and Si (indicating a common origin) suggest some biomass soil contamination. However, no relationship was observed between troublesome deposit formation and the hypothesized biomass soil contamination.

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Experimental study on the coexistent dual slagging in biomass-fired furnaces: Alkali- and silicate melt-induced slagging

Cited by 50 publications

References 15 publications

Biokuro savybių ir juo kūrenamų mažos bei vidutinės galios įrenginių efektyvumo ir taršos parametrų tyrimai

Biokuro savybių ir juo kūrenamų mažos bei vidutinės galios įrenginių efektyvumo ir taršos parametrų tyrimai

Experiment and Kinetics Studies on Ash Fusion Characteristics of Biomass/Coal Mixtures during Combustion

Effect Of Exhausted Olive Cake Contamination On Fly And Bottom Ash In Power Plants

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