Elucidation of Ash Deposition Mechanisms with Interfacial Reaction

Naganuma, Hiroshi; Ikeda, Nobuya; Ito, Tadashi; Sato, Fumio; Urashima, Kazuaki; Takuwa, Tsuyoshi; Yoshiie, Ryo

doi:10.3775/jie.88.816

Cited by 5 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…38 These substances form a bridge between the ash and the metal, increasing the adhesion strength. 8…”

Section: Macroscopic and Microscopic Morphology Analysismentioning

confidence: 99%

“…[4][5][6] The adhesion strength between the ash and the heat exchange tube is also an important factor affecting the growth and shedding of the ash. [7][8][9][10] Ash particles with strong adhesion strength are more likely to stay on the heating surface of the water wall. Ash is difficult to be removed by the soot blower and can capture the ash particles in the flue gas, causing the ash to thicken further.…”

Section: Introductionmentioning

confidence: 99%

“…Masuda et al reported that a liquid bridge was formed between the ash particles, and the increase of the liquid bridge force leaded to the adhesion strength between the particles. Meanwhile, Naganuma et al 8 believed that the ash and metal surfaces were corroded at high temperatures, which also caused the increase in adhesion strength. At present, there are few reports about the research on the adhesion strength of ZDc ash.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation of Zhundong high‐calcium coal ash adhesion characteristics on metal surfaces at high temperatures

Liu

Jin

Zheng

et al. 2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Herein, the influence of ash adhesion characteristics on the slagging of Zhundong high-calcium coal (ZDc) has been firstly investigated via a selfdesigned measuring instrument. The results demonstrate that the early appearance and rapid growth in adhesion strength of ZDc ash are the important reasons for its serious slagging in the furnace, and the temperature plays an important role on the adhesion between ZDc ash and metal. From 800 C to 1000 C, the adhesion strength of ZDc gradually increases from 1.858 to 21.725 kPa. Meanwhile, the adhesion strength could increase rapidly due to the production of more liquid phase when the temperature exceeds 1000 C, and the adhesion strength is 184.933 at 1200 C. The calculation results via FactSage software also indicates that molten sulfate is the main component of liquid-phase ash and the enhancement of the CaO content contributes to promote the low-temperature eutectic of gehlenite, etc., thereby enhances the strengthen of the adhesion.

show abstract

“…38 These substances form a bridge between the ash and the metal, increasing the adhesion strength. 8…”

Section: Macroscopic and Microscopic Morphology Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of Zhundong high‐calcium coal ash adhesion characteristics on metal surfaces at high temperatures

Liu

Jin

Zheng

et al. 2021

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

show abstract

Quantum chemistry mechanism study on preventing slag‐bonding via modifying the material surface properties

Zhang

et al. 2016

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

A huge amount of coal with high content of Na and K in ash was found in Xinjiang Province, China. However, the most serious ash fouling/slagging problems of that kind of coal usually cause the increasing of operating costs and energy consumption in a power plant. In order to clarify the mechanism of the effect on ash deposition behavior on different material surfaces, the experimental study, as well as quantum chemistry calculation, was used in this study. The results show that the nickel‐based material can significantly alleviate the ash deposition of high‐alkali coal. The adsorption energy between Na atom and NiO is much higher than that between Na atom and Fe2O3. The much lower system energy between Na atom and Fe2O3 will cause more stable system of Na‐Fe2O3. However, for nickel‐based material, the electrons of Na‐NiO system are being at a higher energy status, which will cause the system to stay at a relative unstable status. The quantum chemistry calculation results can well explain the phenomena of the experimental result. Furthermore, the interaction mechanisms between Na and Al‐based materials were also calculated to predict the effect of Al‐based material on preventing ash fouling and slagging. Copyright © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.

show abstract

Reduction mechanisms of ash deposition in coal and/or biomass combustion boilers

Naganuma

Ikeda

Ito³

et al. 2013

Fuel

View full text Add to dashboard Cite

Elucidation of Ash Deposition Mechanisms with Interfacial Reaction

Cited by 5 publications

References 19 publications

Experimental investigation of Zhundong high‐calcium coal ash adhesion characteristics on metal surfaces at high temperatures

Experimental investigation of Zhundong high‐calcium coal ash adhesion characteristics on metal surfaces at high temperatures

Quantum chemistry mechanism study on preventing slag‐bonding via modifying the material surface properties

Reduction mechanisms of ash deposition in coal and/or biomass combustion boilers

Contact Info

Product

Resources

About