The main characteristics of high chrome refractories for coal water slurry gasifiers were introduced. The damage mechanism of the refractories was analyzed by observing the microstructure of the used high chrome refra...The main characteristics of high chrome refractories for coal water slurry gasifiers were introduced. The damage mechanism of the refractories was analyzed by observing the microstructure of the used high chrome refractories with the aid of SEM. The main influencing factors on the service life of the refractories were summarized.展开更多
On a laboratory scale opposed multi-burner gasifier(OMBG),the fly ashes at different sampling mouths are collected and analyzed by SEM,EDS,XRF and Malvern mastersizer.Most fly ash particles produced in the gasificatio...On a laboratory scale opposed multi-burner gasifier(OMBG),the fly ashes at different sampling mouths are collected and analyzed by SEM,EDS,XRF and Malvern mastersizer.Most fly ash particles produced in the gasification are irregular,aggregate or spherical.As for the composition of the particles,carbon is the main content,while S,Fe and Na get enriched.At the same time,the concentration of Al and Si in the fly ash particles is lower than that in the original slag.From the nozzle plane to the exit of gasification chamber,the carbon content of particles decreases along the axes of gasifier.The carbon content of particles decreases rapidly from the nozzle plane to No.7 sampling mouth and declines slowly from No.7 sampling mouth to the chamber exit.The size of particles generated in the gasification appears a triple-humped-distribution with peaks at 0.1—0.2 μm,2 μm and 14 μm.The particle size distribution in different sampling places is different.Above the impact plane,more ultra-fine particles are found and coarse particles are larger in location near the impact plane.In symmetrical up and down locations of the impact plane,the particle size distributions are similar,but there are more coarse particles below the impact plane.The coarse particle size decreases and the proportion of fine particles increases below the impact plane,while the proportion of coarse particles increases at the chamber exit.展开更多
文摘The main characteristics of high chrome refractories for coal water slurry gasifiers were introduced. The damage mechanism of the refractories was analyzed by observing the microstructure of the used high chrome refractories with the aid of SEM. The main influencing factors on the service life of the refractories were summarized.
文摘为了考察新型水煤浆气化炉与多喷嘴对置式水煤浆气化炉的对比,应用数值模拟的方法,对该新型水煤浆气化炉与多喷嘴对置式水煤浆气化炉的气化进行了热态数值模拟研究.结果表明,新型水煤浆气化炉在炉内气化流场的组织和产出的有效气成分上均优于多喷嘴对置式水煤浆气化炉,在相同容量的气化炉内,新型水煤浆气化炉与多喷嘴对置式水煤浆气化炉对比,碳转化率高0.75%,水解率高近2.91%,干有效气成分高5.34%,冷煤气效率高7.09%,每产出1 000 m3有效气(CO+H2)可节省氧气20 m3,节省煤36 kg.
文摘On a laboratory scale opposed multi-burner gasifier(OMBG),the fly ashes at different sampling mouths are collected and analyzed by SEM,EDS,XRF and Malvern mastersizer.Most fly ash particles produced in the gasification are irregular,aggregate or spherical.As for the composition of the particles,carbon is the main content,while S,Fe and Na get enriched.At the same time,the concentration of Al and Si in the fly ash particles is lower than that in the original slag.From the nozzle plane to the exit of gasification chamber,the carbon content of particles decreases along the axes of gasifier.The carbon content of particles decreases rapidly from the nozzle plane to No.7 sampling mouth and declines slowly from No.7 sampling mouth to the chamber exit.The size of particles generated in the gasification appears a triple-humped-distribution with peaks at 0.1—0.2 μm,2 μm and 14 μm.The particle size distribution in different sampling places is different.Above the impact plane,more ultra-fine particles are found and coarse particles are larger in location near the impact plane.In symmetrical up and down locations of the impact plane,the particle size distributions are similar,but there are more coarse particles below the impact plane.The coarse particle size decreases and the proportion of fine particles increases below the impact plane,while the proportion of coarse particles increases at the chamber exit.
