Gasification of furfural residue with coal can realize its efficient and clean utilization.But the high alkali metal content in furfural slag is easy to cause the corrosion of gasifier refractory.Two gasification coal...Gasification of furfural residue with coal can realize its efficient and clean utilization.But the high alkali metal content in furfural slag is easy to cause the corrosion of gasifier refractory.Two gasification coals with different silica alumina ratio and a furfural residue were selected in the study.The effects of furfural residue additions on corrosion of silica brick,corundum brick,high alumina brick and mullite brick were investigated by using XRD,SEM-EDS and Factsage Software,and the corrosion mechanism was analyzed.With increasing furfural residue addition,the permeability of the slags to high-aluminium-bearing refractories first decreases and then increases,while the permeability on silica brick shows a slight decrease trend.Leucite(KAlSi_(2)O_(6))with high-melting temperature is generated from the reaction of K_(2)O and SiO_(2)in slag with Al_(2)O_(3)in refractories after furfural residue is added,which hinders the infiltration of slag in refractories.Kaliophilite(KAlSiO_(4))of low-melting point is formed when K_(2)O content increases,and this contributes to the infiltration of slag in refractories.The acid-base reaction between slag and silica brick is distinctly occurred,more slag reacts with SiO_(2)in the silicon brick,resulting in a decrease in the amount of slag infiltrating into the silicon brick as furfural residue is added.The corrosion of silica brick is mainly caused by the acid-base reaction,while the corrosion of three alumina based refractory bricks of corundum,mullite and high alumina brick is determined by slag infiltration.A linear correlation between the percolation rate and slag viscosity is established,the slag permeability increases with decreasing viscosity,resulting in stronger permeability for the high Si/Al ratio slag with lower viscosity.展开更多
在布料仿真过程中,基于位置的动力学方法(Position Based Dynamics, PBD)在布料模拟的效果及实时性方面展现了其优越的性能,但在布料网格精度提升时,为了加快其收敛速度而增加迭代计算次数,会导致模拟效率大幅降低及约束震荡现象的出现...在布料仿真过程中,基于位置的动力学方法(Position Based Dynamics, PBD)在布料模拟的效果及实时性方面展现了其优越的性能,但在布料网格精度提升时,为了加快其收敛速度而增加迭代计算次数,会导致模拟效率大幅降低及约束震荡现象的出现。为了解决以上问题,文章结合对位置动力学方法的研究,提出一种以多重网格思想为核心的布料模拟方法,采用基于二次误差度量(Quadric Error Metrics, QEM)的网格简化法对布料多重网格进行构建,同时结合空间插值算法进行层与层之间的数据传递及位置矫正,可以构建出质量良好的三角网格结构,避免不规则多边形的出现;在布料层次化模拟的基础上,提出结合逐次超松弛迭代法(Successive Over Relaxation, SOR)与Gauss-Seidel方法(GS)的混合平滑方案并验证了其有效性。经实验分析,布料层次化模拟方法提高了质点数目增加后的收敛速度,具有一定的稳定性。展开更多
基金Shandong Province Natural Science Foundation,China(ZR2020KB014,ZR2022QB206)the National Natural Science Foundation of China(22178001)+1 种基金Anhui Provincial Natural Science Foundation(2308085Y19)Research Project for Outstanding Youth of Department of Education of Anhui Province(2022AH030045).
文摘Gasification of furfural residue with coal can realize its efficient and clean utilization.But the high alkali metal content in furfural slag is easy to cause the corrosion of gasifier refractory.Two gasification coals with different silica alumina ratio and a furfural residue were selected in the study.The effects of furfural residue additions on corrosion of silica brick,corundum brick,high alumina brick and mullite brick were investigated by using XRD,SEM-EDS and Factsage Software,and the corrosion mechanism was analyzed.With increasing furfural residue addition,the permeability of the slags to high-aluminium-bearing refractories first decreases and then increases,while the permeability on silica brick shows a slight decrease trend.Leucite(KAlSi_(2)O_(6))with high-melting temperature is generated from the reaction of K_(2)O and SiO_(2)in slag with Al_(2)O_(3)in refractories after furfural residue is added,which hinders the infiltration of slag in refractories.Kaliophilite(KAlSiO_(4))of low-melting point is formed when K_(2)O content increases,and this contributes to the infiltration of slag in refractories.The acid-base reaction between slag and silica brick is distinctly occurred,more slag reacts with SiO_(2)in the silicon brick,resulting in a decrease in the amount of slag infiltrating into the silicon brick as furfural residue is added.The corrosion of silica brick is mainly caused by the acid-base reaction,while the corrosion of three alumina based refractory bricks of corundum,mullite and high alumina brick is determined by slag infiltration.A linear correlation between the percolation rate and slag viscosity is established,the slag permeability increases with decreasing viscosity,resulting in stronger permeability for the high Si/Al ratio slag with lower viscosity.
文摘在布料仿真过程中,基于位置的动力学方法(Position Based Dynamics, PBD)在布料模拟的效果及实时性方面展现了其优越的性能,但在布料网格精度提升时,为了加快其收敛速度而增加迭代计算次数,会导致模拟效率大幅降低及约束震荡现象的出现。为了解决以上问题,文章结合对位置动力学方法的研究,提出一种以多重网格思想为核心的布料模拟方法,采用基于二次误差度量(Quadric Error Metrics, QEM)的网格简化法对布料多重网格进行构建,同时结合空间插值算法进行层与层之间的数据传递及位置矫正,可以构建出质量良好的三角网格结构,避免不规则多边形的出现;在布料层次化模拟的基础上,提出结合逐次超松弛迭代法(Successive Over Relaxation, SOR)与Gauss-Seidel方法(GS)的混合平滑方案并验证了其有效性。经实验分析,布料层次化模拟方法提高了质点数目增加后的收敛速度,具有一定的稳定性。
