A partition rectification column for the separation of c8-c11 normal paraffin mixed fractions

Abstract

A clapboard rectification tower for separating mixed fractions of C8-C11 normal alkanes, relates to a clapboard rectification tower structure, a vertical clapboard is arranged in the middle of the cavity, and the cavity is divided into four part, the partition includes spacer A (11) and spacer B (37), the lower part of one side of spacer A (11) is in contact with the upper part of one side of spacer B (37), gear A (16) and tooth A (15) Engagement, gear B (34) and teeth B (35) are engaged; the present invention sets the separator as a retractable structure, so that the present invention can account for various n-alkanes in the C8-C11 n-alkane mixture The difference in the ratio adjusts the size of the spaces of the four sections, and the floating packing layer A and the floating packing layer B are located in different sections according to the needs, and the purpose of fine fractionation is achieved.

Description

technical field [0001] The invention relates to a structure of a clapboard rectification column, in particular to a clapboard rectification column used for the separation of C8-C11 normal paraffin mixed fractions. Background technique [0002] Most of the mixed fractions contained in Fischer-Tropsch synthetic oil include C8-C20 n-paraffins. In industrial production, distillation cut fractions or multiple vacuum distillations are mainly used to extract n-paraffins in Fischer-Tropsch synthetic oil. When the separation section is a mixture of C8-C11 n-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 requires a large area, and because of low thermal efficiency, it leads to high energy consumption. Now, partition rectification towers are often used for separation. The design of clapboard rectification ...

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

Images