针对某13亿m³/a典型煤制天然气联产甲醇和乙二醇工艺系统进行分析，挖掘该工艺存在的问题以及优化空间。在此基础上，提出了基于二氧化碳返炉的煤制天然气联产甲醇和乙二醇工艺，并利用模拟计算方法得到工艺的物料平衡和能量平衡数据。经分析，相比于典型煤制天然气联产甲醇和乙二醇工艺，基于二氧化碳返炉的煤制天然气联产甲醇和乙二醇工艺年可提升收益1.99亿元左右，表明将二氧化碳返炉技术集成于煤制天然气联产甲醇和乙二醇工艺更具有经济优势。

A typical 1.3 billion cubic meter per year coal to synthetic natural gas with methanol and ethylene glycol co-production process is analyzed by material flow and energy flow analysis methods to find out the existing problems and optimize the process space.On this foundation,a coal to synthetic natural gas,methanol and ethylene glycol co-production process based on carbon dioxide back to the gasifier is proposed.Material balance and energy balance data of the process are obtained by using the simulation calculation method.It is found through analysis that the co-production process based on carbon dioxide back to the gasifier can increase annual income by about RMB199 million compared with typical co-production process,showing that this process has more economic advantages by means of integrating carbon dioxide back to gasifier technology into the coal to synthetic natural gas,methanol and ethylene glycol co-production process.

刘阳(1989-),男,博士,研究方向为煤化工过程优化