Post-mortem analysis of Cr2O3-Al2O3-ZrO2 refractory bricks used in an industrial opposed multi-burner gasifier

Gao, Jinghong; Su, Weiguang; Song, Xudong; Bai, Yonghui; Wang, Jiaofei; Yu, Guangsuo

doi:10.1016/j.engfailanal.2021.106017

Cited by 10 publications

(4 citation statements)

References 37 publications

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“…Cr 2 O 3 –Al 2 O 3 –ZrO 2 bricks are frequently used as K-brick for CWS gasifier on account of their excellent heat stability and corrosion resistance Table indicates the chemical composition and some of physical properties of the Cr 2 O 3 –Al 2 O 3 –ZrO 2 brick.…”

Section: Finite Element Analysesmentioning

confidence: 99%

“…Cr 2 O 3 −Al 2 O 3 −ZrO 2 bricks are frequently used as K-brick for CWS gasifier on account of their excellent heat stability and corrosion resistance. 7 3.3. Load Conditions.…”

Section: Finite Element Analysesmentioning

confidence: 99%

“…Coal-water slurry (CWS) gasification is the most critical technology for clean and efficient utilization of coal. Due to its wide adaptability of raw materials, high carbon conversion rate, large capacity of single gasifier, and environmental friendliness, this technology has been widely used in electric power, petroleum, chemical, and other industries. − The refractory lining is a key component of a CWS gasifier, which can isolate elevated temperature, restrict the flow field, and resist corrosion by particles, slag, and gas. , During long-term service in a CWS gasifier, the refractory lining will inevitably initiate fatigue cracks due to the cyclic thermal shock caused by repeated heating and cooling of the gasifier. Fatigue crack growth has always been the main failure mechanism for a refractory lining serving at elevated temperature and high pressure conditions, leading to early failure of the refractory lining prior to the design life. − This will not only affect the operation cycle and stability of the gasifier, but also cause production accidents.…”

Section: Introductionmentioning

confidence: 99%

“…1−5 The refractory lining is a key component of a CWS gasifier, which can isolate elevated temperature, restrict the flow field, and resist corrosion by particles, slag, and gas. 6,7 During long-term service in a CWS gasifier, the refractory lining will inevitably initiate fatigue cracks due to the cyclic thermal shock caused by repeated heating and cooling of the gasifier. Fatigue crack growth has always been the main failure mechanism for a refractory lining serving at elevated temperature and high pressure conditions, leading to early failure of the refractory lining prior to the design life.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Fracture Failure Behavior of Refractory Lining in Coal-Water Slurry Gasifier

Gao

Shi

et al. 2022

ACS Omega

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Fatigue crack fracture is one of the main reasons for the failure of a refractory lining in a coal-water slurry gasifier. To explore the fracture failure behavior of a refractory lining during the operation of a gasifier, the stress intensity factor (SIF) and J -integral at crack front were calculated by the finite element method, and a crack growth model for the refractory was established. At the same time, the effects of different crack length, depth, and angle on the stress and SIF, as well as J -integral distribution around the crack-tip, were presented. The simulation results demonstrated that very large stresses occurring at the crack tip and the distribution regulation of K I and J -integral along the crack front for surface cracks were similar. The maximum values occurred near the two ends of the crack (θ = 0°, 180°), and the minimum values appeared near the deepest crack front (θ = 90°). K I and J -integral values at the same position increase with increasing crack length and depth and decrease with the angle of crack when the a / c was kept constant. Furthermore, J -integral results indicated that excessive crack depths were likely to cause destabilizing crack growth. These results have provided a reliable theoretical basis for fracture analysis and life prediction of the refractory lining in a gasifier.

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Section: Finite Element Analysesmentioning

confidence: 99%

“…Cr 2 O 3 −Al 2 O 3 −ZrO 2 bricks are frequently used as K-brick for CWS gasifier on account of their excellent heat stability and corrosion resistance. 7 3.3. Load Conditions.…”

Section: Finite Element Analysesmentioning

confidence: 99%