“双气头”甲醇-电多联产系统的设计与优化

Design and optimization of methanol-power polygeneration based on coal gas and coke-oven gas

为使焦炉煤气得到有效利用,设计了基于气化煤气与焦炉煤气的“双气头”多联产工艺流程,建立了系统配置最优化判据,计算发现在分流比为0.802时,低位热值效率具有最大值为48.7％.借助Aspen Plus和GT Pro模拟软件设计了年产12～32万t甲醇和274～ 496 MW电力等不同等级规模的多联产系统,并对系统整体性能和单元过程操作参数等方面进行了分析与讨论,通过模拟得到的最佳低位热值效率与系统配置最优化判据得到的数据十分吻合.

For full use of the coke-oven gas,a double gas head polygeneration flowsheet is designed based on coal gas and coke-oven gas.An optimization criterion is built and the maximal low heat value efficiency is 48.7％ when the split ratio is 0.802.To help clearly understand the system performance,a 120-320 kt methanol and 274-496 MW power polygeneration system is simulated by using the commercially available softwares ASPEN Plus and GT Pro.The modeling result is compatible with the optimization criterion.The performance of the system and operating parameters of units are also analyzed and evaluated.These will be used for building industrial device.