COREX煤气富氢改质的数值模拟

Preliminary Numerical Simulation of Hydrogen-Enriching Reforming of COREX Gas

考虑到COREX熔融还原炼铁工艺中高温煤气物理余热的有效利用和富氢预还原的可行性,模拟了在某一假想碳基填充床内待改质气流通量和气体温度对改质过程的影响。模拟结果表明,在碳基填充床内进行煤气富氢改质是可行的;水消耗量随气流通量或气体温度的提高而增加,碳消耗量随气体温度的提高而增大,但随气流通量的增加而减少;改质后(?)(CO)随气流通量或气体温度的提高而减少,(?)(H_2)随气体温度的提高而增加,但随气流通量的增加则先增加后减少。

Considering the feasibility of hydrogen-enriching pre-reduction in COREX smelting reduction process, and in order to make the effective utilization of gas high-temperature physical heat, the effect of gas flux and temperature on hydrogen-enriching reforming of gas in an imaginary carbon-based packed bed was simulated. The resuits show that hydrogen-enriching reforming of gas in the carbon-based packed bed was feasible. Vapour consumption increases with the increasing of gas flux or gas temperature, carbon consumption increases with the increasing of gas temperature, while it decreases with the increasing of gas flux. Reformed carbon monoxide molar fraction decreases with the increasing of gas flux and gas temperature, reformed hydrogen molar fraction increases with the gas temperature, while it increases first and decreases afterwards with the increasing of gas flux.