干气制氢装置提高氢气回收率减少二氧化碳排放的研究  

Research on improvement of hydrogen recovery rate and reduction of carbon dioxide emissions in hydrogen generation unit from dry gas

作　　者：田进军[1] 王绪远[1] 张保申[2] 

机构地区：[1]中国石油化工股份有限公司济南分公司,山东省济南市250101 [2]山东三维石化工程股份有限公司,山东省淄博市255434

出　　处：《炼油技术与工程》2016年第1期25-28,32,共5页Petroleum Refinery Engineering

摘　　要：中国石油化工股份有限公司济南分公司干气制氢装置采用的是干气(天然气、轻烃)蒸汽转化+变压吸附制氢工艺,该工艺具有氢气纯度高的优点,但也具有氢气回收率低,二氧化碳排放量大的缺点,造成炼油厂氢气成本高,加工损失率大。通过分析中变气性质和各脱碳工艺,拟选择醇胺法脱除中变气中的二氧化碳,吸收剂选用活化N-甲基二乙醇胺溶剂,并从工艺流程、原料、产品、公用工程消耗、经济评价方面分析了项目可行性。研究结果表明:通过增加中变气脱除二氧化碳设施,干气制氢装置可以多回收氢气1 003 t/a,可提高氢气回收率5百分点左右,有效降低制氢成本;同时回收85 620 t/a的二氧化碳副产品,降低企业加工损失率约1.71百分点,减少二氧化碳排放,增加经济和社会效益。The dry gas（ natural gas,light hydrocarbons） steam reforming ＋ PSA（ pressure swing adsorption） process has been applied in the dry gas hydrogen generation unit in SINOPEC Jinan Company. Although the hydrogen generation process has the advantage of high hydrogen purity,it also has the shortcomings of low hydrogen recovery rate and carbon dioxide emissions,which will lead to high hydrogen cost and high rate of refinery processing loss. By analyzing the medium-temperature shift gas properties and decarbonization process,it is suggested to use alkanolamine solution to remove carbon dioxide from the medium-temperature shift gas. The feasibility of the project is studied in respect of process,feedstock,products,utility consumption and economics. The results show that the installation of carbon dioxide gas removal facilities will recover 1 003 tons of additional hydrogen and 85 620 t / a of additional carbon dioxide by-product. The hydrogen recovery rate is increased by 5%,and the processing loss is reduced by 1. 71%. The carbon dioxide emissions are decreased and economic and social benefits are improved.

关 键 词：干气制氢 氢气回收率 二氧化碳排放 

分 类 号：TQ116.2[化学工程—无机化工]