不同合成工艺的二氧化碳催化加氢制甲醇装置经济性分析  

Plants economic analysis of catalytic hydrogenation of CO_(2)to methanol with different synthesis processes

作　　者：吴子波 蹇守华 吴路平 WU Zibo;JIAN Shouhua;WU Luping(State Key Laboratory of Industrial Vent Gas Reuse,Southwest Institute of Chemical Co.,Ltd.,Chengdu 610225,Sichuan,China)

机构地区：[1]西南化工研究设计院有限公司工业排放气综合利用国家重点实验室,四川成都610225

出　　处：《低碳化学与化工》2023年第6期60-66,共7页Low-Carbon Chemistry and Chemical Engineering

摘　　要：为研究二氧化碳催化加氢制甲醇规模化装置的经济性,以较有代表性的3种工艺(单塔带循环工艺、双塔带循环工艺和双塔带循环加小合成工艺)为研究对象,以10×10^(4)t/a甲醇产能为例,分别从固定资产投资、公用工程消耗和总成本费用这三方面,对3种工艺的经济性进行了分析和比较。结果表明,双塔带循环工艺较单塔带循环工艺的总成本费用减少5.3%,双塔带循环加小合成工艺较单塔带循环工艺的总成本费用减少9.0%。在总成本费用中,氢气占比为46%~52%,因此氢气是影响总成本费用的决定性因素,当甲醇价格取2696.9 CNY/t,二氧化碳价格小于等于0.4 CNY/m^(3),氢气价格小于等于0.7 CNY/m^(3)时,双塔带循环加小合成工艺具有经济可行性。In order to study the economy of carbon dioxide catalytic hydrogenation large-scale methanol production plants,three representative processes(one methanol tower with circulation process,two methanol towers with circulation process and two methanol towers with circulation and small synthesis process)were taken as the research object,and 10×10^(4)t/a methanol production capacity was taken as an example from three aspects:fixed asset investment,public engineering consumption and total cost.The economic efficiency of the three processes was analyzed and compared.The results show that the total cost of two methanol towers with circulation process is reduced by 5.3%compared to one methanol tower with circulation process and the total cost of two methanol towers with circulation and small synthesis process is reduced by 9.0%compared to one methanol tower with circulation process.In the total cost,hydrogen accounts from 46%to 52%,so hydrogen is the decisive factor affecting the total cost.When the price of methanol is 2696.9 CNY/t,the price of carbon dioxide is less than or equal to 0.4 CNY/m^(3)and the price of hydrogen is less than or equal to 0.7 CNY/m^(3),two methanol towers with circulation and small synthesis process is economically feasible.

关 键 词：二氧化碳 催化加氢 甲醇 固定资产投资 公用工程消耗 总成本费用 

分 类 号：TQ223.12[化学工程—有机化工]