合成气深冷分离部分冷凝与甲烷洗工艺的模拟与对比分析  

Simulation and comparison of syngas cryogenic partial condensation and methane wash separation processes

作　　者：孙彦泽[1] SUN Yanze(Beijing Petrochemical Engineering Co.,Ltd.,Xi′an 710100,Shaanxi Province,China)

机构地区：[1]北京石油化工工程有限公司,陕西西安710100

出　　处：《化学工程》2024年第9期90-94,共5页Chemical Engineering(China)

摘　　要：根据常规原料合成气中氢、一氧化碳、甲烷组分含量的不同,通常有2种不同的分离工艺用于提纯一氧化碳产品和纯氢或富氢产品。当这些原料合成气中组分与常规工业气体组成相差较大时,往往无法直接判断采用部分冷凝工艺还是采用甲烷洗工艺对此类合成气进行分离。为找到一种快捷判断采用哪种分离工艺更为合理的依据,通过调整原料合成气中关键组分一氧化碳和甲烷的体积比,利用ASPEN HYSYS模拟计算出部分冷凝和甲烷洗2种合成气深冷分离工艺各自对应不同工况所需配置的制冷压缩机组功耗,经过对比发现当原料合成气中一氧化碳与甲烷组分体积比≤30及甲烷体积分数≥1.5%时,甲烷洗工艺能耗优于部分冷凝工艺,此时选择甲烷洗工艺进行合成气分离更为合理,反之采用部分冷凝工艺更为合理。Based on the differences of the common industrial feed syngas compositions of hydrogen,carbon monoxide and methane,there are two main separation processes,the partial condensation process and liquid methane wash process,applied accordingly to produce the pure carbon monoxide product and pure hydrogen or hydrogen rich product.When the syngas compositions are far different from the common syngas compositions,it will be quite difficult to find a direct way to select which separation process is superior to the other one.To find a reasonable criteria of deciding which cryogenic separation process is better suited for the given syngas,process simulations were carried out using ASPEN HYSYS software to calculate the different scenarios of the refrigeration compressor power consumptions by adjusting the volumetric ratio of the key components of carbon monoxide and methane.A conclusion is made that methane wash process is superior to partial condensation process with a carbon monoxide to methane volumetric ratio no greater than 30 and methane volume fraction no less than 1.5%in the feed syngas and vice versa.

关 键 词：合成气 深冷分离 部分冷凝 甲烷洗 

分 类 号：TQ54[化学工程—煤化学工程]