Rectification system

Abstract

The invention belongs to the technical field of chemical equipment and particularly relates to a rectification system. The rectification system comprises two parallel rectifying towers, a protective reactor and a reboiler, wherein the protective reactor is communicated with the feed inlets I of the parallel rectifying towers through pipelines; the reboiler comprises a shell, a pipeline I and a pipeline II are arranged in the shell, the left end of the shell is provided with a pipeline I inlet and a pipeline II outlet, and the right end of the shell is provided with a pipeline I outlet and a pipeline II inlet; the pipeline I and the pipeline II are spiral pipelines coaxial with the shell, and the spiral directions of the pipeline I and the pipeline II are identical; the spiral parts of the pipeline I and the pipeline II are arranged at interval; the pipeline I inlet is communicated with the discharge outlets I of the parallel rectifying towers through pipelines, and the pipeline I outlet is communicated with the feed inlets II of the rectifying towers; the pipeline I is a material pipeline; the pipeline II is a heating-medium pipeline. By the rectification system, rectification efficiency can be increased effectively, the rectification effect can be guaranteed, and online replacing of catalysts in the rectifying towers can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a rectification system. Background technique [0002] Distillation is one of the commonly used operating methods in the chemical industry, and it is usually realized by a rectification tower. However, the commonly used distillation towers have the following problems: [0003] 1. The raw materials contain impurities such as metal cations, which can easily lead to the deactivation of the catalyst in the rectification tower; [0004] 2. After the catalyst in the rectification tower is deactivated, the rectification needs to be stopped for replacement, which reduces the rectification efficiency; [0005] 3. The residence time of the material in the reboiler is too short in the reboiler, and the material and the heating medium cannot fully exchange heat. [0006] The above-mentioned problems all lead to the reduction of rectification efficiency and poor recti...

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Problems solved by technology

[0003] 1. The raw materials contain impurities such as metal cations, which can easily lead to the deactivation of the catalyst in the rectification tower;

[0004] 2. After the catalyst in the rectification tower is deactivated, the rectification needs to be stopped for replacement, which reduces the rectification efficiency;

[0005] 3. The residence time of the material in the reboiler is too short in the reboiler, and the material and the heating medium cannot fully exchange heat

[0006] The above problems all lead to the reduction of rectification efficiency and poor rectification effect

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