熔融还原煤气改质的数值模拟

考虑到两步法熔融还原中煤气的显热没有得到充分的利用,对煤气改质进行数值模拟研究.研究结果表明,相同的气体温度和气体流量下,碳消耗量随着填充床的高度增加(或碳基粒度的减少)而增加,水蒸气消耗量随着填充床高度的增加(或碳基粒度的减少)而减少;COREX终还原炉发生煤气改质后氧化度由0.10降至0.065,HIsmelt熔融还原炉炉顶煤气氧化度由0.625降至0.223,煤气的显热得到充分利用.

Numerical Simulation of Gas Reforming During Smelting Reduction

Given the incomplete utilization of enthalpy heat in a two-step smelting reduction process,gas reforming was studied by using numerical simulation.Under fixed gas temperature and flux,carbon consumption increased with increasing of carbon-based packed bed height and decreasing carbon particle size,while water vapor consumption decreased with carbon-based packed bed height and decreasing carbon particle size;extent of oxidation of gas in the COREX decreased from 0.10 to 0.065,while oxidation of gas in the HIsmelt decreased from 0.625 to 0.223,and the heat was fully utilized.