Study on combustion characteristics of pulverized coal in confined space
To improve the burnout rate of coal in blast furnace and enhance the effect of pulverized coal injection in blast furnace,the mathematical models of gas-solid two-phase turbulence flow,heat exchange and pulverized coal combustion in blowpipe and raceway were studied.At the same time,based on the technological parameters of practical blast furnace,the effects of blast temperature,the distribution of particle size of pulverized coal and mixed pulverized coal on the combustion of pulverized coal were studied by numerical simulation.The burnout rate of coal was used as the measure of the combustion extent of pulverized coal in blast furnace.The results showed that decreasing the particle size of pulverized coal and increasing the blast temperature and the ratio of the volatile in mixed coal could raise the burnout rate of coal.In the combustion process,the combustion amount of volatile reached 100 ％.The factor which influenced the burnout rate was mainly the combustion amount of the fixed carbon.
NETL
NSTL
万方数据
维普
