费托合成水相副产物混合醇渗透蒸发分离工艺

发布时间：2018-02-16 15:11

本文关键词： 费托合成醇渗透蒸发分离　出处：《化工进展》2017年06期 　论文类型：期刊论文

【摘要】：对以钴基催化剂、浆态床工艺为核心的费托合成中试装置产生的水相副产物的分离提纯过程进行了研究,针对目前混合醇多塔精馏回收工艺能耗高的问题,提出了渗透蒸发与精馏耦合的分离提纯工艺。新工艺保留传统多塔精馏回收工艺中的脱水塔和粗分塔,对原工艺中C_1~C_3混合醇-水的分离提纯采用渗透蒸发技术替代传统的精馏技术。研究结果表明:NaA型沸石分子筛渗透膜是混合醇渗透蒸发脱水适宜的膜分离材料,该渗透膜的渗透通量可达2.4 kg/(m~2·h),粗分塔塔顶产品C_1~C_3混合醇-水混合物经过渗透蒸发,混合醇中含水量由17.09%降低到0.5%以下。费托合成水相副产物混合醇经渗透蒸发-精馏耦合工艺可得到含水量低于0.5%的醇产品,与传统多塔精馏回收工艺相比,渗透蒸发-精馏耦合工艺可节能24%,节能效果显著。
[Abstract]:The separation and purification process of water phase by-products produced in the pilot plant of Fischer synthesis with cobalt based catalyst and slurry bed process as the core was studied. The problem of high energy consumption in the recovery process of multi-tower distillation of mixed alcohols was discussed. The separation and purification process of the coupling of osmotic evaporation and distillation is put forward. The new process retains the dehydration tower and the coarse separation column in the traditional multi-tower distillation recovery process. The separation and purification of C _ 1H _ 3C _ S _ 3 mixed alcohol-water in the original process was carried out by using permeation evaporation instead of traditional distillation technology. The results showed that the permeable membrane of zeolite zeolite (zeolite) was suitable for dehydration of mixed alcohol by pervaporation and dehydration. The permeation flux of the membrane is up to 2. 4 kg/(m~2 路h ~ (-1), and the mixture of alcohol and water mixed with C _ 1 / C _ (1) C _ (3) is evaporated by osmotic evaporation. The water content in mixed alcohols was reduced from 17.09% to 0.5%. The alcohols with water content less than 0.5% could be obtained by the coupling process of pervaporation and distillation, which was compared with the traditional multi-tower distillation recovery process. The coupling process of osmotic evaporation and distillation can save 24% energy, and the effect of energy saving is remarkable.
【作者单位】：福州大学石油化工学院;
【基金】：福建省科技厅项目(2014Y0066)
【分类号】：TQ028.3

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