Process for the energy-efficient operation of a distillation column

    公开(公告)号:DE3522234A1

    公开(公告)日:1987-01-02

    申请号:DE3522234

    申请日:1985-06-21

    Applicant: BASF AG

    Abstract: Process for the energy-efficient operation of a distillation column, which is provided in a section with a longitudinal division - executed in the form of a partition - for repressing transverse mixing of liquid streams and vapour streams, in which - in the longitudinally divided region of the column, in the central region of the part, which is situated both above the feed point and above the take-off point of the side fraction or in the case of two take-off points above the topmost take-off point, temperature measurement points are arranged in pairs in the feed part and in the take-off part at the same height of the column and/or - in the longitudinally divided region of the column, in the central region of the part, which is situated both beneath the take-off point of the side fraction or in the case of two take-off points beneath the lowest take-off point, temperature measurement points are arranged in pairs in the feed part and in the take-off part at the same height of the column, and - by means of a temperature difference control, which is performed automatically or manually, the temperatures at the described measurement points are adjusted in such a way that the temperature in the feed part at the upper measurement point is lower than, or at most the same as, in the take-off point and the temperature in the feed part at the lower measurement point is higher than, or at least exactly as high as, in the take-off part and - the control operation used for the temperature difference control is the liquid division at the top end of the longitudinal division.

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