连续精馏分离高温费托合成反应水中的含氧有机物  

Separation of organic compounds from high-temperature Fischer-Tropsch reaction water by continuous distillation

作　　者：杨正伟[1] 孙启文[1] 张宗森[1] 

机构地区：[1]上海兖矿能源科技研发有限公司煤液化及煤化工国家重点实验室,上海201203

出　　处：《化学工程》2014年第10期29-33,40,共6页Chemical Engineering(China)

摘　　要：根据高温费托合成反应水的组成特点,采用连续精馏塔对反应水进行初分,以脱除大部分水和有机酸,同时,将非酸类含氧有机物提浓,利于后续化学品分离。首先采用NRTL热力学方法对流程进行了模拟,考察了塔板数、进料位置、回流比等工艺条件对分离结果的影响,得到了最优操作条件,然后采用实验室小型精馏塔对高温费托合成中试副产反应水进行了实验验证。结果表明:塔顶有机物质量分数可提高到75%以上,有机酸质量分数为0;塔釜采出物中非酸有机物质量分数小于0.01%,模拟最优条件为塔板数35块、进料位置为第15块,回流比为4。实验值与模拟值吻合良好。According to the complicated characteristic of reaction water from high-temperature Fischer-Tropsch synthesis, the continuous distillation was used to deal with the primary separation for reaction water so as to remove carboxylic acids and most water. Simultaneously, the non acidic organic compounds were condensed to make for the downstream product separation. The NRTL thermodynamic method was used to investigate the effect of theoretical stage number, feed stage number and reflux ratio on the separation effect so as to get the best operational parameter. Then a bench-scale distillation column was used to verify the simulation value. The result shows that the mass fraction of organic compounds at the top is more than 75%, carboxylic acid mass fraction is 0; the mass fraction of the non acidic organic compounds at the bottom is less than 0.01%. The best operational parameters are as follows： theoretical stage number is 35, feed stage number is 15, and reflux ratio is 4. The experimental value matches well with the simulation value.

关 键 词：费托合成 反应水 精馏 模拟 优化 

分 类 号：TQ529.2[化学工程—煤化学工程]