Opposed multi-burner(OMB)gasification technology is the first large-scale gasification technology developed in China with completely independent intellectual property rights.It has been widely used around the world,in...Opposed multi-burner(OMB)gasification technology is the first large-scale gasification technology developed in China with completely independent intellectual property rights.It has been widely used around the world,involving synthetic ammonia,methanol,ethylene glycol,coal liquefaction,hydrogen production and other fields.This paper summarizes the research and development process of OMB gasification technology from the perspective of the cold model experiment and process simulation,pilotscale study and industrial demonstration.The latest progress of fundamental research in nozzle atomization and dispersion,mixing enhancement of impinging flow,multiscale reaction of different carbonaceous feedstocks,spectral characteristic of impinging flame and particle characteristics inside gasifier,and comprehensive gasification model are reviewed.The latest industrial application progress of ultralarge-scale OMB gasifier and radiant syngas cooler(RSC)combined with quenching chamber OMB gasifier are introduced,and the prospects for the future technical development are proposed as well.展开更多
The particle residence time distributions in the entrained-flow gasifier as the important parameters in the gasification process were studied by using a new stimulus response method.The differences of the particle res...The particle residence time distributions in the entrained-flow gasifier as the important parameters in the gasification process were studied by using a new stimulus response method.The differences of the particle residence time distributions in the opposed multi-burner entrained-flow(OMBEF) and Texaco gasifier were compared.The influence of gas velocity and particle diameter on particle residence time distributions was discussed.The experimental results showed that the new stimulus response method was reliable and could be used to measure the particle residence time distributions in the entrained-flow gasifier and the particle residence time in the OMBEF gasifier was more favorable than in the Texaco gasifier.The results also showed that with increasing gas velocity and decreasing particle diameter,the mean and variance of particle residence time increased in both kinds of entrained-flow gasifier.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
基金supported by the National Natural Science Foundation of China(21776086,21761132034)。
文摘Opposed multi-burner(OMB)gasification technology is the first large-scale gasification technology developed in China with completely independent intellectual property rights.It has been widely used around the world,involving synthetic ammonia,methanol,ethylene glycol,coal liquefaction,hydrogen production and other fields.This paper summarizes the research and development process of OMB gasification technology from the perspective of the cold model experiment and process simulation,pilotscale study and industrial demonstration.The latest progress of fundamental research in nozzle atomization and dispersion,mixing enhancement of impinging flow,multiscale reaction of different carbonaceous feedstocks,spectral characteristic of impinging flame and particle characteristics inside gasifier,and comprehensive gasification model are reviewed.The latest industrial application progress of ultralarge-scale OMB gasifier and radiant syngas cooler(RSC)combined with quenching chamber OMB gasifier are introduced,and the prospects for the future technical development are proposed as well.
文摘The particle residence time distributions in the entrained-flow gasifier as the important parameters in the gasification process were studied by using a new stimulus response method.The differences of the particle residence time distributions in the opposed multi-burner entrained-flow(OMBEF) and Texaco gasifier were compared.The influence of gas velocity and particle diameter on particle residence time distributions was discussed.The experimental results showed that the new stimulus response method was reliable and could be used to measure the particle residence time distributions in the entrained-flow gasifier and the particle residence time in the OMBEF gasifier was more favorable than in the Texaco gasifier.The results also showed that with increasing gas velocity and decreasing particle diameter,the mean and variance of particle residence time increased in both kinds of entrained-flow gasifier.
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.
