Partition rectifying tower for separating mixed fractions of C8-C11 n-alkanes

Abstract

A partition rectifying tower for separating mixed fractions of C8-C11 n-alkanes relates to a partition rectifying tower structure, a vertical partition is arranged in the middle of a cavity and divides the cavity into four parts, the partition comprises a partition piece A (11) and a partition piece B (37), the lower portion of one side of the partition piece A (11) is in contact with the upper portion of one side of the partition piece B (37), a gear A (16) is meshed with teeth A (15), and a gear B (34) is meshed with teeth B (35); and the partition plate is arranged to be the telescopic structure, such that the sizes of the four distillation section spaces can be adjusted according to the different proportions of various n-alkanes in the C8-C11 n-alkane mixture, and the floating filler layer A and the floating filler layer B are located at the different distillation sections according to the requirements so as to achieve the fine fractionation purpose.

Description

technical field [0001] The invention relates to a structure of a partitioned rectification tower, in particular to a partitioned rectification tower for separating mixed fractions of C8-C11 normal alkanes. Background technique [0002] The mixed fraction contained in Fischer-Tropsch synthetic oil mostly includes C8-C20 normal paraffins. In industrial production, the normal paraffins in the Fischer-Tropsch synthetic oil are mainly extracted by distillation cut fractions or multiple vacuum rectifications. When the separation section is a mixture of C8-C11 normal paraffins, multiple conventional rectification towers are required to be connected in series. In order to realize the preparation of high-purity n-paraffin products, it not only requires high equipment investment costs, but also occupies a large area, and because of low thermal efficiency, it leads to high energy consumption. Nowadays, partitioned rectification towers are often used for separation. The design of the p...

AI Technical Summary

Problems solved by technology

When the separation section is a mixture of C8-C11 normal paraffins with a clapboard rectification tower, the proportion of various normal paraffins in the mixture of raw materials C8-C11 normal paraffins for each separation is not constant, so each time Cutting fractions with the same clapboard rectification column every time will easily cause the accuracy of the cut products obtained from the top, bottom and side lines of the tower to fail to output according to the predetermined value

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