Research on element migration and ash deposition characteristics of high-alkali coal in horizontal liquid slagging cyclone furnace

Hu, Shihao; Ni, Yuguo; Yin, Qi; Wang, Jiankang; Lv, Laiquan; Cen, Kefa; Zhou, Hao

doi:10.1016/j.fuel.2021.121962

Cited by 21 publications

(3 citation statements)

References 18 publications

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“…The experiment was firstly conducted in a 20-kW slagging-type cyclone fired combustor test facility, which was introduced in Refs. [5,6]. As shown in Figure 2, the test facility is mainly composed of primary air inlet, secondary air inlet, electrical heating cyclone chamber, burn-out chamber with a partition panel inside and a slag tapping hole at the bottom, and other auxiliary equipment.…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…In a recent research, the slagging-type cyclone combustion is also proved to be suitable for the Zhundong coal combustion because of the suppression of the molten slag on sodium diffusion [4]. A following experimental investigation in a slag-tapping combustor studied the sodium retention behavior of Zhundong high-alkali coal, which also shows that the molten slag has a high capacity of capturing alkali metals released during the slag-tapping combustion [5,6]. The release of vapor phase sodium has strong dependence on combustion temperature and coal composition in the slag-tapping combustion.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Gaseous Sodium Release in Slag-Tapping Coal-Fired Furnaces by Spontaneous Emission Spectroscopy

Jing

Li³

et al. 2022

Energies

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High-alkali coal is rich in alkali metals, which can cause serious effects such as slagging and corrosion on the heating surface during combustion and utilization. A portable spectral system was utilized to simultaneously measure gaseous Na concentration and temperature in a 20 kW slag-tapping combustor and a slagging boiler furnace of a 300 MW power generation unit by flame spontaneous emission spectroscopy (FES) for simultaneous measuring. The result shows that both ZD-FK and ZD-HSQ (Fukang coal and Hongshaquan coal, Xinjiang Zhundong high-alkali coal) combustion flame temperatures are around 1400 °C at the outlet of the cyclone burner while the latter is slightly higher. The sodium concentration in the gas phase increases with the rising of the initial combustion temperature and unit load for one kind of coal, and the level of sodium concentration has a strong correlation with the Na content for different coal. Most of the sodium in the high temperature zone of the furnace exists in the form of gas phase, and more sodium migrates to fly ash. Combined with the analysis of fly ash and liquid slag samples, a closed-loop analysis of the Na migration path could be established.

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Section: Experimental Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Gaseous Sodium Release in Slag-Tapping Coal-Fired Furnaces by Spontaneous Emission Spectroscopy

Jing

Li³

et al. 2022

Energies

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“…Coals with the significant economic value of critical element production are usually called 'metalliferous coal' [2,6] or 'coal-hosted rare-metal deposit' [7]. More recently, further studies have paid close attention to the occurrence and recovery methods from these coals [8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and Geochemistry of the Lower Cretaceous Coals in the Junde Mine, Hegang Coalfield, Northeastern China

Wei

Qin

et al. 2022

Energies

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Hegang coalfield is one of the areas with abundant coal resources in Heilongjiang Province. Characteristics of minerals and geochemistry of No. 26 coal (lower Cretaceous coals) from Junde mine, Hegang coalfield, Heilongjiang province, China, were reported. The results showed that No. 26 coal of Junde mine is slightly enriched in Cs, Pb, and Zr compared with world coals. The minerals in No. 26 coal of Junde mine primarily include clay minerals and quartz, followed by calcite, siderite, pyrite, monazite, and zircon. The diagrams of Al2O3–TiO2, Zr/Sc–Th/Sc, Al2O3/TiO2–Sr/Y, and Al2O3/TiO2–La/Yb indicate that the enriched elements in No. 26 coal were mainly sourced from the Late Paleozoic meta-igneous rocks in Jiamusi block. The volcanic ash contribution to No. 26 coal seems very low. Sulfate sulfur indicating oxidation/evaporation gradually decreases during No. 26 coal formation.

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Mixing performance of preheated flue gas entering selective catalytic reactor under low loads

Zhang

Zhou

2023

Applied Thermal Engineering

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Research on element migration and ash deposition characteristics of high-alkali coal in horizontal liquid slagging cyclone furnace

Cited by 21 publications

References 18 publications

Experimental Investigation of Gaseous Sodium Release in Slag-Tapping Coal-Fired Furnaces by Spontaneous Emission Spectroscopy

Experimental Investigation of Gaseous Sodium Release in Slag-Tapping Coal-Fired Furnaces by Spontaneous Emission Spectroscopy

Mineralogy and Geochemistry of the Lower Cretaceous Coals in the Junde Mine, Hegang Coalfield, Northeastern China

Mixing performance of preheated flue gas entering selective catalytic reactor under low loads

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