Characterisation of ash deposits on a probe at different temperatures during combustion of a Zhundong lignite in a drop tube furnace

Li, Jianbo; Zhu, Mingming; Zhang, Zhezi; Zhang, Kai; Shen, Guoqing; Zhang, Dongke

doi:10.1016/j.fuproc.2015.12.024

Cited by 118 publications

(56 citation statements)

References 41 publications

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“…Substances with a low fusion point and high viscosity, such as NaSO 4 and CaSO 4 , which were formed during high-temperature ashing, lowered the four characteristic ash fusion temperatures of high-sodium coal. Thus, this was one of the crucial reasons for fouling during the combustion of high-sodium coal.…”

Section: Ash Fusion Characteristics Of Manasi Coal Oil Shale and MImentioning

confidence: 99%

“…The coal found in Zhundong region is mainly high-sodium coal, with sodium content (by ash) higher than 2%. The coal in this region is characterized by its low rank, inflammability, ease of burnout, medium/high water content, low ash content, high volatile content, moderate calorific value, high slagging tendency, high alkali-metal content, and high fouling tendency [2][3][4]. These distinct properties of Zhundong coal result in problems of fouling, slagging, and corrosion of the heat exchange surface and boiler wall during its combustion in boilers in power plants.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of ash fusion characteristics and migration of sodium during co-combustion of Zhundong coal and oil shale

Wang

et al. 2017

Applied Thermal Engineering

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Section: Ash Fusion Characteristics Of Manasi Coal Oil Shale and MImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of ash fusion characteristics and migration of sodium during co-combustion of Zhundong coal and oil shale

Wang

et al. 2017

Applied Thermal Engineering

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“…Since the air-cooling condition is similar to the actual industrial boiler, attention should be paid to the Cl-caused corrosion of deposits. Additionally, alkali-metal-sulfate-caused corrosion might occur during the combustion of Zhundong coal [34]. XRD reveals more mineral phases in deposits than in ash (Figs.…”

Section: Differences Between Ash and Depositsmentioning

confidence: 99%

Effects of wall temperature on slagging and ash deposition of Zhundong coal during circulating fluidized bed gasification

Song

et al. 2016

Applied Thermal Engineering

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“…The too high content of alkali and alkaline earth metal (AAEM) elements in Zhundong coal has been considered as the main reason for slagging and fouling (Li et al, 2015(Li et al, , 2016a(Li et al, , 2016b. The phase analysis of slags by X-ray diffraction (XRD) collected from boilers with Zhundong as fuel showed lots of AAEM-rich silicates and aluminosilicates, which melted at $1100 C (Li et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of bed materials on slagging and fouling during Zhundong coal gasification

Song

et al. 2017

Energy Exploration & Exploitation

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The suitable bed material is important to inhibit ash-related problems including agglomeration and slagging in furnace and fouling on tail heated surfaces during coal gasification in fluidized bed. For newfound high-alkali vast-reserve Zhundong coal in China, the selection of bed material in fluidized bed should be paid more attention because of its more serious ash-related issues. Five bed materials including quartz, kaolin, corundum, sludge ash, and phosphate rock were used to investigate their feasibility to solve the ash-related issues of two typical types of Zhundong coal including Tianchimulei coal and Shaerhu coal. All of five bed materials could effectively impact the release and transformation of alkali and alkaline earth metal species, especially Na species. The capture order of Na by five bed materials from high to low was sludge ash, quartz, kaolin, corundum, and phosphate rock for the two types of coal, and ash fusion temperatures of residual ash added different bed materials were in orders of phosphate rock > corundum > sludge ash > kaolin > quartz for Tianchimulei coal and corundum > phosphate rock > sludge ash > kaolin > quartz for Shaerhu coal. This influence of bed materials was mainly related to their chemical compositions, especially Al-, Si-, and P-based compounds. Due to the strong capture of alkali and alkaline earth metal-based compounds and high ash fusibility temperature, sludge ash was suggested as the appropriate selection of the bed material during Zhundong coal gasification in fluidized bed. Moreover, this suggestion would contribute to the sewage sludge treatment.

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Characterisation of ash deposits on a probe at different temperatures during combustion of a Zhundong lignite in a drop tube furnace

Cited by 118 publications

References 41 publications

Investigation of ash fusion characteristics and migration of sodium during co-combustion of Zhundong coal and oil shale

Investigation of ash fusion characteristics and migration of sodium during co-combustion of Zhundong coal and oil shale

Effects of wall temperature on slagging and ash deposition of Zhundong coal during circulating fluidized bed gasification

Effect of bed materials on slagging and fouling during Zhundong coal gasification

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