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基于ASPEN PLUS软件模拟平台,对生物质与煤气流床共气化过程进行模拟,考察操作条件及生物质与煤配比变化对气化性能的影响。模拟计算结果表明:与生物质单独气化相比,生物质与煤共气化能提高气化温度及气化效率;与煤单独气化相比,生物质可部分替代煤且不会明显改变气化效果,尽管气化温度略有下降,但混合物灰熔点的降低能很好弥补这一变化。生物质质量分数为20%,[O]/[C]摩尔比在1.1～1.3时气化效果最佳,气化温度约为1250℃,有效气产率1.92Nm~3/kg,煤气热值可达到11.5MJ/Nm~3,冷煤气效率79.7%。
Based on ASPEN PLUS software simulation platform, the co-gasification process between biomass and coal bed was simulated, and the influence of operating conditions and the ratio of biomass to coal on gasification performance was investigated. The simulation results show that biomass co-gasification with coal can increase the gasification temperature and gasification efficiency compared with biomass gasification alone. Compared with coal gasification alone, biomass can partially replace coal and will not change significantly Gasification effect, although the gasification temperature decreased slightly, but the melting point of the mixture can be reduced to better compensate for this change. The mass fraction of biomass is 20%, and the optimal gasification is obtained when the molar ratio of [O] / [C] is 1.1-1.3. The gasification temperature is about 1250 ℃ and the effective gas production rate is 1.92Nm ~ 3 / kg. Can reach 11.5MJ / Nm ~ 3, cold gas efficiency of 79.7%.