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本发明涉及一种用于分离醋酸和水的方法,主要解决现有技术中醋酸脱水过程能耗高,操作费用高的问题。本发明通过采用醋酸脱水塔采用加压的方式进行精馏脱水,热泵循环中采用水作为换热介质,醋酸脱水塔塔顶出料冷凝释放的热量通过闭式热泵流程中的换热介质吸收,换热介质吸收塔顶出料的能量后经过压缩机压缩后温度升高,用于塔釜再沸器与塔底出料换热,在塔釜换热后的蒸汽减压后进入气液分离罐,分离后的液相进入塔顶冷凝器换热,分离后的气相与塔顶冷凝器出口的气体混合后一起进入压缩机,用于再次与塔釜换热的技术方案较好地解决了该问题,可应用于分离醋酸和水的工业生产中。
The present invention relates to a method for separating acetic acid and water, which mainly solves the problem of high energy consumption and high operating cost in the prior art process of acetic acid dehydration. In the invention, water is used as a heat exchange medium in the heat pump cycle, and the heat released by condensation on the top of the acetic acid dehydration tower is absorbed by the heat exchange medium in the closed heat pump process, After the heat transfer medium absorbs the energy discharged from the top of the tower, the temperature increases after being compressed by the compressor, and is used for the heat exchange between the tower reboiler and the bottom of the tower after being decompressed by the steam in the tower kettle, Tank, the separated liquid enters the overhead condenser for heat exchange, and the separated gas phase is mixed with the gas at the outlet of the overhead condenser to enter the compressor, which is then used to solve the technical solution of the heat exchange with the tower kettle again This problem can be applied to the industrial production of acetic acid and water.